| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310490010 | Stepping | 73 |
| 20090206685 | MOTOR DEVICE - A motor device may include a motor main body having a stator portion and a rotary shaft having a lead screw portion projecting from the stator portion. The motor frame may have a rotary shaft support portion supporting an end of the rotary shaft on an output side and a stator support portion opposed to the rotary shaft support portion and fixed to the stator portion. An engaging member is engaged with the lead screw portion and movable in an axial direction of the rotary shaft. The engaging member is provided with two opposing faces respectively opposed to the rotary shaft support portion and the stator support portion. Positioning sections are formed on both the rotary shaft support portion and the stator support portion or on the two opposing faces of the engaging member for determining an original position for the engaging member to move in the axial direction. | 08-20-2009 |
| 20090309429 | STEPPING MOTOR - A stepping motor is disclosed, configured in such a manner that a cover is hitched by a hitching protruder of a housing to allow the cover to be coupled to the housing, or the cover is hitched by a caulking unit of the housing to allow the cover to be coupled to the housing, whereby the problem of parts being damaged by using adhesive can be reduced or eliminated because the adhesive is not used in coupling the cover. In addition, bending of the hitching protruder of the housing or caulking of a surface of the housing allows the cover to be coupled to the housing, whereby assembly time can be shortened to enhance the productivity. | 12-17-2009 |
| 20100194216 | Electronic Retrofit Controller for Hydraulically Adjusted Printing Press - A retrofit kit for a printing press adjustment hydraulic actuator. The hydraulic actuator is maintained to benefit from its mounting position and alignment, but the hydraulic fluid is removed. A hydraulic actuator shaft is attached to a mechanism that converts the rotary motion of an electric motor to linear motion. The electric motor provides faster and more accurate control of the hydraulic actuator shaft than the hydraulic fluid, providing for faster adjustment of the printing press. | 08-05-2010 |
| 20110057521 | Air-core stepping motor and shaft support structure - An air-core stepping motor includes: a tubular stator including a yoke and a coil; a tubular rotor including a cylindrical magnet; and rotor support means for supporting the rotor rotatably with respect to the stator, the rotor support means including a sleeve fixed to the rotor, a holder fixed to the stator, and a ball held between the sleeve and the holder, the holder having a first holder member and a second holder member separated in a rotational-axial direction of the motor, the first holder member and the second holder member being assembled with the first holder member or the second holder member fitted to the sleeve, and being used thereafter with the first holder member or the second holder member disconnected from the sleeve. | 03-10-2011 |
| 20110084560 | Step Motor - Disclosed herein is a step motor, including a lead screw, a rotor fixed to an outer surface of the lead screw, a fixture containing a stator disposed to face the rotor and a housing whose one side end part is open to insert the stator and wrap the stator, and a bracket having a bracket body of a plate shape on which the housing is disposed and a bending part bent towards the one side end part of the housing from the bracket body. | 04-14-2011 |
| 20110089776 | STEPPING MOTOR - A stepping motor includes: a cylindrical rotor assembly disposed around the rotation axis; a stator assembly including two stator units disposed around the rotor assembly and axially coupled to each other; and a terminal structure disposed at the axial center of the outer circumference of the stator assembly. The terminal structure includes: a terminal block cluster composed of four terminal blocks; and four terminals fixed respectively to the four terminal blocks. The four terminals each include: an internal connection portion to which one of two wire ends of the winding is connected; and an external connection portion which is disposed substantially parallel to the internal connection portion and which is connected to a driving circuit disposed externally. The four terminals are arranged in a line along a direction substantially orthogonal to the rotation axis, and the internal connection portion and the external connection portion are aligned along the rotation axis. | 04-21-2011 |
| 20120019082 | Linear Stepping Motor - The present invention relates to a linear stepping motor, the motor characterized by: a housing; a stator mounted inside the housing: a rotor rotatively arranged at an inner surface of the stator and mounted with a female screw threaded to a lead screw; a mounting plate fixed at a lateral surface of the housing for passing the lead screw; and a plate cover coupled between the mounting plate and the housing configured to prevent a bearing rotatively supporting the female screw from axially moving, such that the bearing can be securely fixed in a simple structure by the plate cover itself to allow a free design in the size of a central hole of the housing or the size of an outer diameter of a magnet regardless of the size of outer diameter of the bearing, and the bearing is securely fixed to the plate cover by caulking to prevent the bearing from moving axially, whereby vibration and noise can be remarkably reduced to enhance the reliability of the product. | 01-26-2012 |
| 20120200180 | MOTOR CAPABLE OF ADJUSTING PHASE DIFFERENCE BETWEEN OUTPUT SIGNALS - A motor capable of performing mechanical position adjustment of a magnetic detection unit to thereby adjust a phase difference between signals output from respective two magnetosensitive pole pieces. A rotor includes a magnet having an axial end surface magnetized to have circumferentially alternately different poles. A stator has two outer magnetic pole portions opposed to an outer peripheral surface of the magnet. Two coils are energized to excite the outer magnetic pole portions. A magnetic sensor is opposed to an axial end surface of the magnet. The magnetosensitive pole pieces of the magnetic sensor detect a magnetic field change caused by rotation of the magnet. The magnetosensitive pole pieces are arranged side by side in a direction orthogonal to a diametrical direction of the magnet. The position of the magnetic sensor can be adjusted in the diametrical direction of the magnet. | 08-09-2012 |
| 20130033133 | STEPPING MOTOR - Disclosed herein is a stepping motor. The stepping motor include a bracket including a fixing hole; a shaft supporter rotatably supporting one end of a shaft and fitted into the fixing hole; and a pressure supporter pressing and supporting the fixing hole and the shaft supporter while forming a plurality of pressure support points between the fixing hole and the shaft supporter. As such, the plurality of pressure support points is formed between the shaft supporter and the fixing hole, thereby enabling the shaft supporter to be stably press-fitted into and fixed to the fixing hole of the bracket. | 02-07-2013 |
| 20140167534 | STEPPING MOTOR - A stepping motor includes a first plate; a second plate having a side facing the first plate and a reverse side; a stator held by the first plate and the second plate axially; plural band connecting portions equipped in the first plate, disposed at a side surface of the stator, extending toward the second plate and having an engaging portion at an outer side thereof; and a band portion contacting the reverse side of the second plate, extending toward the first plate and having plural arm portions engaging respective engaging portions of the band connecting portion. The band portion is connected to the first plate while holding the second plate and the stator therebetween by engaging the plural arms with the engaging portions, the band portion is elastically deformed, the deformation causes tensile force in which the arm portions pull the band connecting portions toward the band portion. | 06-19-2014 |
| 20150357894 | HYBRID STEPPING MOTOR - A hybrid stepping motor comprises a front-end cover, a rear end cover, a rotating shaft, a rotor, a stator, a front bearing and a rear bearing and magnet steel, wherein the stator is an injection-molded stator. A stator core is internally provided with a plurality of injection-molded frameworks for bearing an enameled wire winding. Each injection-molded framework is provided with an enameled wire guard board on the inside. The inner side of each enameled wire guard board forms an inner hole of the stator and each enameled wire guard board serves as a seam for motor assembling. In the case of the same motor thickness, use of the motor of the present invention can enhance the moment by 15%˜45%. In the case of the same moment, use of the motor of the present invention can reduce the thickness by 10%˜15%. Thus, iron loss can be reduced when the motor is running. | 12-10-2015 |
| 20160049843 | MOTOR HAVING STATOR ASSEMBLY WITH INTEGRATED MOUNTING AND HEAT SINK FEATURES - A step motor integrates its mounting face and heat sink into the stator design. In particular, mounting holes (typically, four in number) are provided through the stator stack in outer perimeter areas. The stator stack itself becomes the mounting surface, allowing the heat generated from the stator to conduct directly to the mounting plate. The front end cap for holding the rotor in alignment is situated inside of the stator's mounting surface and takes no part in mounting the motor to the mounting surface. The end caps only hold the rotor in proper relation within the stator and contain the bearing assembly for the rotor's axial drive shaft. The perimeter of the stator assembly between the mounting screw holes may have saw-tooth cutouts that define heat-dissipation fins. | 02-18-2016 |
| 20160065042 | STEP MOTOR - Disclosed herein is a step motor. The step motor includes a casing, a stator disposed in the casing, with a coil being wound around the stator, a rotor disposed in the stator, having a rotor shaft that is rotatably supported at both ends of the casing, and rotated by interaction with the stator, a rotary sensing unit provided in the casing to detect a rotation of the rotor, and a coil connector formed on an outer surface of the stator, with an end of the coil being connected to the coil connector. | 03-03-2016 |
| 20160079838 | STEPPER MOTOR - A stepper motor includes: a rotor including a rotor core and a permanent magnet, the rotor core including a plurality of teeth; and a stator arranged around the rotor while being spaced apart from the rotor and including a plurality of magnetic pole teeth, the magnetic pole teeth including a plurality of teeth and projecting toward the rotor. A winding is wound around every other magnetic pole tooth. A phase of the teeth of the magnetic pole teeth with no winding therearound is shifted from a phase of the teeth of the other magnetic pole teeth. | 03-17-2016 |
| 310490020 | Having a coil axially concentric to rotor axis (e.g., toroid coil) | 9 |
| 310490030 | With bias magnet to position rotor (e.g., parking magnet, auxiliary flux) | 1 |
| 20100259114 | Vibration Motor - Disclosed herein is vibration motor. The vibration motor includes a bearing rotatably fitted over a support shaft which is installed to be perpendicular to a base. A hub is coupled to the bearing, with an eccentric member provided on the edge of the hub. A coil is mounted to the hub to form an electric field. A magnet having 2n poles is mounted on the base, and rotates the hub using electromagnetic force between the magnet and the coil. A detent magnet is mounted to the hub and stops the coil in the middle between the poles of the magnet. | 10-14-2010 |
| 310490050 | Axially adjacent to rotor end | 2 |
| 20100013328 | STEPPING MOTOR - A stepping motor includes: a rotating shaft; a rotor fixed to the rotating shaft; a terminal unit disposed at a side of the rotor, and having an external power supply applied thereto; a coil coupled to the terminal unit; and an outer yoke disposed in circumferential directions around outsides of the coil and the rotor to form magnetic pole portions, and disposed in a circumferential direction around an inside of the coil to increase an area through which magnetic flux flows. | 01-21-2010 |
| 310490070 | Coil axially adjacent to each end of a rotor | 1 |
| 20090295238 | DRIVING APPARATUS - A driving apparatus includes a first magnet, second magnet, stator, first coil, second coil, first bearing, second bearing and rotor. The first and second magnets respectively have a magnetized portion in which S pole and N pole are alternately magnetized. The rotor has a magnetic pole portion opposite to each magnetized portion. The stator fixes the first magnet and second magnet to the same axis to rotatably support the rotor. The first coil magnetically excites a portion where the magnetic pole portion of the rotor faces the first magnet. The second coil magnetically excites a portion where the magnetic pole portion of the rotor faces the second magnet. Thereby, a driving apparatus is provided which stabilizes the quality by simplifying the configuration of a rotor and makes it possible to realize high speed of rotation and improvement of response speed by decreasing the moment of inertia of a rotor. | 12-03-2009 |
| 310490130 | Having coil bobbin | 1 |
| 20120212081 | STEP MOTOR AND METHOD OF MANUFACTURING THEREOF - Disclosed are a step motor and a manufacturing method thereof. The step motor includes a stator having a bobbin in which a coil is received to generate a magnetic field when power is supplied, and a yoke having a plurality of yoke teeth engaged with the bobbin, a casing covering and protecting the stator, and a rotor inserted into an inner diameter part of the stator and having magnets on a circumference of a rotary shaft, so as to generate rotary force, wherein a bearing is installed to an end of the rotary shaft to support the rotor, and an elastic member is assembled to the bearing to force the end of the rotary shaft inwards in a motor assembly composed of the stator and rotor. | 08-23-2012 |
| 310490150 | Having interfitting poles | 3 |
| 20110285217 | STEPPING MOTOR - A claw-pole-type stepping motor includes a stator annularly disposed therein and having a coil, a rotor rotatably disposed inside the stator and having a multiply magnetized permanent magnet and a shaft, an outer yoke provided in the stator and having a cup shape opening toward an axially outside direction an outer circumferential portion provided in the outer yoke and having a cylindrical shape and an inner circumferential portion including first pole teeth, an inner yoke provided in the stator and having second pole teeth provided in an inner circumference thereof and an outer circumferential portion fixed to an inner circumferential surface of the outer circumferential portion of the outer yoke, in which the first pole teeth and the second pole teeth are engaging with each other via a gap in an axial direction and are disposed with respect to the permanent magnet of the rotor via a gap, a fixed portion of the inner yoke and the outer yoke is positioned at the axial inside of an opening end of the cup shape of the outer yoke and the opening end protrudes beyond the fixed portion toward the axially outer direction. | 11-24-2011 |
| 20140300219 | STEPPING MOTOR - A stepping motor may include a rotor having a rotation shaft and a permanent magnet, a fixed body having a cylindrical stator provided with a plurality of pole teeth so as to face the permanent magnet, an urging member which urges the rotor toward one side in a motor axial line direction, a supported face of the rotor which faces the one side in the motor axial line direction, and a support face of the fixed body which slidably supports the supported face of the rotor on the one side with respect to the supported face. When a first sliding load which is a total sliding load applied to the rotor is “Ta”, a detent torque acted on the rotor is “Td”, and a dynamic torque acted on the rotor by the stator is “Te”, then “Ta”, “Td” and “Te” satisfy the following expression: | 10-09-2014 |
| 310490160 | Having a particular dimension | 1 |
| 20110050009 | STEPPING MOTOR - A stepping motor may include a rotor having a drive magnet and a stator having a drive coil wound in a tube shape and disposed on the drive magnet. The stator may include a first yoke, a second yoke, a plurality of first pole teeth provided in the first yoke, and a plurality of second pole teeth provided in the second yoke. The plurality of the first pole teeth and the second pole teeth may be alternately disposed in a circumferential direction of the rotor. | 03-03-2011 |
| 310490180 | With rotary to linear conversion | 2 |
| 20110018371 | STEP-BY-STEP MOTOR ABLE TO CARRY OUT UP-AND-DOWN TRANSMISSION - A step-by-step motor able to carry out up-and-down transmission includes a housing, a top rod, a circuit board, a magnet, a coil unit and a cover. The top rod is inserted in an insert hole of the housing, having a wall bored with a cut recess. The circuit board has a position-limiting switch received in an engage groove of the housing and provided with a sidewise rod inserted in the cut recess of the top rod. The magnet is fixed with a connecting member connecting a bearing, and the lower end of the top rod is engaged with the connecting member. The coil unit is fitted around the magnet and positioned in the housing, and the cover is covered on the bottom of the housing. The magnet is driven by the coil unit to rotate and actuate the top rod to move upward or downward steadily. | 01-27-2011 |
| 20110181134 | Stepping Motor - Disclosed is a stepping motor in which the rim of a substrate and the lower surface of the substrate directed toward the outside of a bracket are arranged inside of the bracket to prevent the rim and lower surface of the substrate from projecting outwardly. Accordingly, the substrate is prevented from colliding against an object during a falling impact test, thus preventing damage to the substrate and improving the durability and reliability of the stepping motor. Further, the substrate gets caught by a hook of the bracket when the substrate is pressed toward the bracket when the substrate is located at a predetermined point of the bracket. This leads to a simplified assembly process and improved productivity. | 07-28-2011 |
| 310490220 | Axially thin type (e.g., disk-shaped motor, planer) | 1 |
| 310490230 | Having a particular stator feature | 1 |
| 20100194217 | Stepping motor and method of manufacturing the same - A stepping motor includes a housing, a supporting shaft, a rotor, and a stator. The housing includes a first wall and a second wall facing each other. The supporting shaft is inserted into a through hole of the rotor and is held by the first wall and the second wall. The rotor has a first end face and a second end face in an axial direction of the rotor. The first end face and the second end face are separated from the first wall and the second wall, respectively. A lubricant fills between the through hole and the supporting shaft, and an oil repellent agent is applied at a predetermined first area of the first wall around the supporting shaft and a predetermined second area of the second wall around the supporting shaft. | 08-05-2010 |
| 310490320 | Permanent magnet rotor with axially directed flux path | 7 |
| 20090200877 | STEPPING MOTOR - A stepping motor is provided with a rotor having with a rotor shaft A permanent magnet is attached to an outer peripheral side of the rotor shaft and a stator having pole teeth faces the permanent magnet in a radial direction. The stepping motor is characterized in that the rotor shaft is formed of aluminum or aluminum alloy. | 08-13-2009 |
| 310490330 | Having stepping function related to a particular stator winding arrangement | 1 |
| 20100231063 | ROTATION STRUCTURE - A rotation structure rotates a rotatable segment via the attraction between a number of electromagnetic elements disposed on another rotatable segment around a screw and a magnet disposed on another rotatable segment. The rotated angle of the rotatable segment can be controlled by selectably magnetizing the electromagnetic elements in response to an instruction generated by pressing a button formed on another rotatable segment. | 09-16-2010 |
| 310490340 | Having particular stator pole feature | 1 |
| 20140132092 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine having high efficiency and torque, in which the stator is provided with a stator core including an annular yoke portion and n winding poles radially extending from the annular yoke portion, the rotor core includes a circumference portion having small teeth substantially in parallel with the rotary shaft, and an end surface portion having small teeth substantially perpendicular to the rotary shaft, the circumference portion of the winding pole in the stator and the circumference portion of the rotor core in the rotor face each other via an air gap to provide a radial gap, and the end surface portion of the winding pole in the stator and the end surface portion of the rotor core in the rotor face each other via an air gap to provide an axial gap, and n is an integer of 2 or more. | 05-15-2014 |
| 310490370 | Having particular stator-pole to rotor-pole relationship | 4 |
| 20110304225 | ROTARY ELECTRIC MACHINE - A rotary electric machine includes a stator in which windings are arranged around a plurality of main poles of a stator core, and a hybrid type rotor arranged with an air gap between the stator and the rotor has a step angle for the rotor of about 4.09° and uses metal bearings for supporting a rotor shaft of the rotor. Setting of the step angle for the rotor to be about 4.09° can make a rotation angle of the rotor caused by excitation of the windings by an input pulse signal larger as compared with a typical motor having a step angle of about 1.8°. With this unique arrangement, the rotor can be rotated at higher speeds, increasing the motor efficiency. Therefore, the motor output at approximately the same level as that of a conventional motor can be obtained without keeping the air gap high precision. Due to this, even if inexpensive slide bearings, i.e., metal bearings to support the rotor, are used, the performance equal to or higher than that of the conventional motor can be ensured, resulting in a large cost reduction. | 12-15-2011 |
| 20130154405 | HYBRID ROTARY ELECTRICAL MACHINE - A hybrid rotary electrical machine that obtains a deviation angle of about one half of a pole teeth pitch between magnetic teeth of two rotor magnetic pole members gripping a permanent magnet of a rotor including rotor magnetic pole members that include the magnetic teeth at an equal pitch T on a surface thereof. The rotor magnetic pole members include cutout portions on the inner circumferential surface or the outer circumferential surface of the rotor magnetic pole members in a specified positional relationship with respect to the magnetic teeth. The cutout portions of one of the rotor magnetic pole members are axially aligned with the cutout portions of the other rotor magnetic pole member turned upside down so the magnetic teeth of one of the rotor magnetic pole members have a phase difference of about T/2 with respect to the magnetic teeth of the other rotor magnetic pole member. | 06-20-2013 |
| 20130249331 | HYBRID STEPPING MOTOR - There is provided a hybrid stepping motor including a rotor including a plurality of rotor small teeth arranged on an outer circumferential surface thereof, and a stator including a plurality of salient poles, each including a plurality of stator small teeth. The stator small teeth have a predetermined stator tooth thickness and are arranged at a predetermined stator tooth pitch, the rotor small teeth have a predetermined rotor tooth thickness and are arranged at a predetermined rotor tooth pitch, and a facing area which is a difference between an area of attraction poles of the stator small teeth and the rotor small teeth and an area of repulsion poles thereof ranges between a maximum value in a parameter space of a dimensional ratio of the stator and/or the rotor and a threshold value of the maximum value. | 09-26-2013 |
| 20130249332 | HYBRID STEPPING MOTOR - There is provided a hybrid stepping motor including a rotor including a plurality of rotor small teeth arranged at an equal pitch on an outer circumferential surface thereof, and a stator including a plurality of salient poles, each including a plurality of stator small teeth arranged to face the outer circumferential surface of the rotor via a gap. The stator small teeth have a predetermined stator tooth thickness and are arranged at a predetermined stator tooth pitch. The rotor small teeth have a predetermined rotor tooth thickness and are arranged at a predetermined rotor tooth pitch. A repulsion area ratio which is a ratio of an area of repulsion poles to a total area of all stator small teeth facing the rotor ranges from 0% to a predetermined threshold value. | 09-26-2013 |
| 310490420 | Having dual axial air gaps | 1 |
| 20120001502 | Multi-unit Modular Stackable Switched Reluctance Motor System with Parallely Excited Low Reluctance Circumferential Magnetic Flux loops for High Torque Density Generation - The present invention is a apparatus of multi-unit modular stackable switched reluctance motor system with parallely excited low reluctance circumferential magnetic flux loops for high torque density generation. For maximized benefits and advanced motor features, the present invention takes full combined advantages of both SRM architecture and “Axial Flux” architecture by applying “Axial Flux” architecture into SRM design without using any permanent magnet, by modularizing and stacking the “Axial Flux” SRM design for easy configuration and customization to satisfy various drive torque requirements and broad applications, and by incorporating an en energy recovery transformer for minimizing switching circuitry thus further lowering the cost and further increasing the reliability and robustness. Unlike prior arts, the present invention does not use any permanent magnet and this “Axial Flux” SRM system is modularized and stackable with many benefits. | 01-05-2012 |
| 310490430 | Reluctance type | 29 |
| 20130015727 | ROTOR FOR RELUCTANCE MOTORAANM Iki; TomotakaAACI UtsunomiyaAACO JPAAGP Iki; Tomotaka Utsunomiya JP - A rotor described herein includes a plurality of flux barriers that include at least one magnetic path formed between a plurality of slits. The flux barriers are arranged in a circumferential direction at a predetermined interval. Adjacent flux barriers are concatenated on an inner circumferential side by an annular connector provided on the inner circumferential side, and are separated on an outer circumferential side by openings provided on the outer circumferential side. The rotor also includes a permanent magnet at least partially embedded within the annular connector. | 01-17-2013 |
| 20130043745 | SYNCHRONOUS RELUCTANCE MOTOR FOR CONDUCTING MEDIA - A synchronous reluctance motor for conveying media with large air gap for low speed operation with simple scalar control, which comprises a stator and a tapered reluctance rotor are reported. | 02-21-2013 |
| 20130154406 | SWITCHED RELUCTANCE MOTOR ASSEMBLY - Disclosed herein is a switched reluctance motor assembly including: a shaft becoming the rotation center of the motor; a rotor part rotatably coupled to the shaft; a first bearing part coupled to an upper portion of the rotor part in an axial direction; a stopper coupled to a lower portion of the rotor part in the axial direction; and a second bearing part coupled to a lower portion of the stopper in the axial direction. According to the present invention, a distance in the axial direction between the bearing parts formed at both sides based on the shaft of the switched reluctance motor is reduced, thereby making it possible to reduce vibration and noise generated at the time of driving of the motor. | 06-20-2013 |
| 20130169074 | SYNCHRONOUS RELCUTANCE MOTOR FOR CONDUCTING MEDIA - A synchronous reluctance motor for conveying media with large air gap for low speed operation with simple scalar control, which comprises a stator and a tapered reluctance rotor are reported. | 07-04-2013 |
| 20130342039 | Switched Reluctance Motor and Switched Reluctance Motor Drive System - A regenerative switched reluctance motor and a motor drive system therefor are provided. The motor has a rotor | 12-26-2013 |
| 20130342040 | Switched Reluctance Motor and Switched Reluctance Motor Drive System - A regenerative switched reluctance motor and a motor drive system therefor are provided. The motor has a rotor | 12-26-2013 |
| 20140125157 | Poly-Phase Reluctance Electric Motor with Transverse Magnetic Flux - Disclosed is a poly-phase reluctance electric motor with transverse magnetic flux, which electric motor is composed of a stator and a rotor. The stator is composed of a housing ( | 05-08-2014 |
| 20150084451 | SWITCHED RELUCTANCE MOTOR AND SWITCHED RELUCTANCE APPARATUS FOR HYBRID VEHICLES - An improved hybrid drive apparatus with a switched reluctance hub motor. The switched reluctance motor eliminates any drag caused by the existing magnetic fields of the motors used in the prior art by turning off the magnetic fields when not being used. It also is cleaner and more efficient to operate, as any magnetic road dust or debris attracted during operation is dropped or repelled when the magnetic fields are turned off. An improved switched reluctance motor may be used, with a stator ring and rotor ring designed so that the low reluctance flux path does not pass through the full diameter of the rotor or rotor bars. | 03-26-2015 |
| 20150349590 | COIL SLOT FOR CASTELLATED VARIABLE RELUCTANCE MOTOR (CVRM) - This publication relates to a coil slot for 6 poled CVRM with 60 degrees angle between the centre of the slots. The slot have a shape so the two planes through centre of the first layer of coil wires wound into two adjacent slots are parallel and that the bottom of the slot has a length so all wires in the first layer touch each other and that the sides walls of the slot has an angle of 60 degrees to the bottom so there is one extra wire in each new wire layer and that the side walls go over to top walls which are perpendicular to the bottom of the slot and that the outer top wall is extended all the way to the centre of the slot where the chamber against the outer top wall for the next coil is smaller than the wire radius and that the inner top wall of two adjacent slots are collinear and that the extension of the inner top walls are outside the inner radius of the teeth and that the outer top walls are collinear. | 12-03-2015 |
| 20160043621 | HOUSEHOLD APPLIANCE - A household appliance includes a drivable, especially rotatable, functional unit, and an electric motor being adapted to drive the functional unit. The electric motor is a synchronous reluctance motor having a stator, the stator having a number ns of stator slots with concentrated stator slot windings, and a rotor, the rotor having a number nr of rotor poles, wherein a ratio r=ns/nr between the number of stator slots and the number of rotor poles is 9/6, or 9/8, or 12/8. | 02-11-2016 |
| 20160094113 | Motor Topology with Exchangeable Components to Form Different Classes of Motors - Exchangeable stator components are selected and exchangeable rotor components are selected to transform a motor from one motor class to another motor class. A motor comprises at least two stator rings, at least two outer rotor rings, a first input, and a second input. The first input comprises at least one exchangeable stator component selected from a stator component group consisting of a stator spacer ring and an axially magnetized stator magnet ring. The second input comprises at least one exchangeable rotor component from a rotor component group consisting of a rotor spacer ring and an axially magnetized rotor magnet ring. The first input and the second input determine a motor class for the motor, the exchangeable stator component being exchangeable for a different exchangeable stator component to manufacture another motor having a different motor class, the exchangeable rotor component being exchangeable for a different exchangeable rotor component to manufacture another motor having another different motor class. | 03-31-2016 |
| 310490440 | Having a particular stator pole to rotor pole relationship | 10 |
| 20100052439 | Rotary reluctance motor - A rotary reluctance motor includes a set of inner disks each having an inner diameter root, an outer diameter free end, and a plurality of alternating high permeability teeth and low permeability material segments. A set of outer disks is interleaved with the inner disks to form a disk stack. Each outer disk has an outer diameter root, an inner diameter free end, and a plurality of alternating high permeability teeth and low permeability material segments. The inner and outer disks are configured to bear against and support each other in response to axial magnetic forces. Flux return portions are disposed axially adjacent the disks at each end of the disk stack. A coil is associated with the roots of one of the sets of disks and configured to provide axial flux through the disk stack to rotate one set of disks with respect to the other set of disks. | 03-04-2010 |
| 20100066184 | HYBRID TYPE ROTARY ELECTRIC MACHINE - A hybrid type stepper motor preferably includes a two-phase eight-main-pole stator and a rotor defined by two rotor units each having a pair of rotor magnetic poles with a permanent magnet interposed therebetween. Each rotor magnetic pole has fine teeth at a regular pitch. The permanent magnets are magnetized in opposite directions to each other. The adjacent rotor magnetic poles of the rotor units are arranged with their fine teeth aligned with each other in the axial direction. Each main pole has six inductor teeth including: a pair of innermost inductor teeth arranged at the first pitch in the central portion of the main pole; a pair of intermediate teeth on the outside of the innermost inductor teeth at the second pitch therefrom; and a pair of outermost inductor teeth on the outside of the intermediate inductor teeth at the third pitch therefrom. The first, second, and third pitches are all different from the pitch of the fine teeth of the rotor magnetic pole. At least one of the first, second, and third pitches is different from the others. | 03-18-2010 |
| 20100133929 | PERMANENT-MAGNET ROTARY ELECTRIC MACHINE - A permanent-magnet rotary electric machine preferably includes a stator and a rotor opposed thereto via an air gap. The stator includes a stator core having 4m (m is an integer equal to or larger than 2) main poles each having inductor teeth at a tip thereof. The rotor includes two rotor units adjacent to each other in the axial direction. Each rotor unit includes a pair of rotor magnetic poles and a permanent magnet arranged therebetween. The permanent magnets in the rotor are axially magnetized in opposite directions to each other. Each rotor magnetic pole has magnetic teeth on its outer periphery at a regular pitch. The rotor magnetic poles in each rotor unit are arranged such that the magnetic teeth of one rotor magnetic plate are offset by half a pitch from those of the other rotor magnetic pole, and the magnetic teeth of adjacent rotor magnetic poles are aligned with each other in the axial direction. The tooth pitch of the inductor teeth of each stator main pole is different from that of the magnetic teeth of the rotor magnetic pole to generate a fourth harmonic component of a permeance between the stator and the rotor zero. | 06-03-2010 |
| 20110221285 | ROLLING BEARING HAVING INTEGRATED RELUCTANCE STEPPER MOTOR - A rolling bearing, which includes a first bearing ring, a second bearing ring, an intermediate element, which can be a rolling body, or a cage for a rolling body, arranged movably between both bearing rings, and a reluctance stepper motor, which has a rotor and a stator. The stator is formed by at least one pole shoe, which is arranged between the two bearing rings and has magnetic field that can be electrically controlled. The intermediate element is designed as a rotor of the reluctance stepper motor. | 09-15-2011 |
| 20110248582 | SWITCHED RELUCTANCE MACHINE - A switched reluctance machine (SRM) having a rotor and stator pole numerical relationship of S number of stator poles and R number of rotor poles, where R=2S−2, when S is greater than 4; provides improved power density, torque production, torque ripple, and is readily adaptable to existing hardware such as known controllers and the like. | 10-13-2011 |
| 20120019083 | HIGH POWER-DENSITY, HIGH EFFICIENCY, NON-PERMANENT MAGNET ELECTRIC MACHINE - A system and method of manufacturing an electric machine comprising a rotor and a stator, wherein the stator comprises a fractional-slot concentrated winding having two sets of terminals, wherein a first set of terminals configures the fractional-slot concentrated winding to have a first pole-number (P | 01-26-2012 |
| 20130169075 | SWITCHED RELUCTANCE MOTOR - Disclosed herein is a switched reluctance motor including: a rotor part including a rotor core and rotor poles each formed to be protruded from the rotor core; and a stator part including a stator yoke rotatably receiving the rotor part therein and stator salient poles each formed to be protruded from the stator yoke so as to face the rotor poles, wherein a ratio of the number of stator salient poles to the number of rotor poles is (6×n+9):((6×n+9)+1) or (6×n+9):((6×n+9)−1), (n=0, 1, 2 . . . ), (where n=0, 1, 2 . . . ). | 07-04-2013 |
| 20140042837 | THREE PHASED BALANCED OR UNBALANCED ASYMMETRIC RELUCTANCE MOTOR - This patent describes a three-phased reluctance motor ( | 02-13-2014 |
| 20140152129 | DOUBLE ROTOR STEPPING MOTOR - In precision mechanical actuators, wherein a high precision stepping motor can notably be used in the actuating mechanisms of artificial satellites, a stepping motor comprises two rotors that rotate in opposite directions to generate a low-amplitude movement between one of the rotors and a stator. The first rotor comprises a first set of teeth distributed at a first pitch p | 06-05-2014 |
| 20190148998 | SWITCHED RELUCTANCE MACHINE WITH SHORT FLUX PATH | 05-16-2019 |
| 310490450 | Having a stepping function related to a particular stator winding arrangement | 1 |
| 20100033034 | High-Power and High-Torque Step Motor - A high-power and high-torque step motor comprising a stator which is provided with a first stator pole, a second stator pole, a third stator pole, a fourth stator pole, a fifth stator pole, a sixth stator pole, a seventh stator pole and a eighth stator pole. An A-phase winding orderly winds around the first, third, fifth and seventh stator poles, and a B-phase winding orderly winds around the second, fourth, sixth and eighth stator poles. The first, second, fifth and sixth stator poles are wound in the same direction, and the winding direction of the third, fourth, seventh and eighth stator poles is opposite to that of the first, second, fifth and sixth stator poles. By such arrangements, the high-power and high-torque step motor is formed. | 02-11-2010 |
| 310490460 | Having stator with winding and permanent magnet | 7 |
| 20090206686 | RING COIL MOTOR - The invention relates to a ring coil motor ( | 08-20-2009 |
| 20100033035 | Ring Motor - A ring motor ( | 02-11-2010 |
| 20100072832 | Flux-switching magnetic machine - A flux-switching magnetic machine is provided having a drive element and a driven element. The drive element is configured to generate a composite magnetic field comprising a fixed component and a variable component, the fixed component being generated by spaced fixed field members and the variable component being generated by spaced armature windings. The driven element has a plurality of magnetisable portions configured to be coupled to the composite magnetic field generated by the drive element, such that the driven element moves in response to changes in this field. The number of fixed field members is greater than the number of armature windings. | 03-25-2010 |
| 20110050010 | TRANSVERSE AND/OR COMMUTATED FLUX SYSTEM STATOR CONCEPTS - Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain exemplary stators for use in transverse and commutated flux machines may be configured with gaps therebetween, for example in order to counteract tolerance stackup. Other exemplary stators may be configured as partial stators having a limited number of magnets and/or flux concentrators thereon. Partial stators may facilitate ease of assembly and/or use with various rotors. Additionally, exemplary floating stators can allow a transverse and/or commutated flux machine to utilize an air gap independent of the diameter of a rotor. Via use of such exemplary stators, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications. | 03-03-2011 |
| 20110181135 | MICRO-STEPPING RELUCTANCE MOTOR - The present invention relates to control of electrical motors and in particular, to the design and control of reluctance motors capable of micro-stepping position control. According to the invention there is provided a single stack variable reluctance machine with salient stator teeth and salient rotor teeth, the stator further comprising field magnet sections created by either permanent magnets or field windings or a combination of permanent magnets and field windings, and further comprising armature windings connected to form at least two armature phase windings, the armature phase windings connected to a power source or power electronic inverter for the supply of positive and negative current to at least two armature phase windings such that the rotor rotates in small incremental steps in response to small changes in the current in one or more of the phase windings. | 07-28-2011 |
| 20110198950 | STEPPING MOTORS WITH SMALL STEP INTERVALS - An improved motor ( | 08-18-2011 |
| 20130082549 | SWITCHED RELUCTANCE MOTOR - Disclosed herein is a switched reluctance motor including: a stator including a plurality of magnets and stator salient poles disposed between the plurality of magnets; and a rotor including salient poles formed at an inner diameter thereof so as to face the stator salient poles, wherein three stator salient poles are disposed between the magnets, the number of stator salient poles is 6*N and the number of salient poles of the rotor facing the stator salient poles is 3*N, where N indicates a natural number of 2 or more. | 04-04-2013 |
| 310490470 | Gearing defines stepping effect | 2 |
| 310490480 | Positioned in magnetic air gap | 1 |
| 20110210627 | ELECTROMAGNETIC STEP-BY-STEP WOBBLE-TYPE MICROMOTOR - An electromagnetic step-by-step wobbling micromotor comprises an inner component and an annular component being external to the inner one. The outer component may be a stator and the inner component a rotor, or vice versa. The inner component has three or more poles with a winding on each pole, and an external surface facing an internal surface of the outer component. During the operation of the micromotor each winding is powered. The external and internal surfaces have toothed surfaces. Each tooth has a peak radius which is different from the valley radius. | 09-01-2011 |
| 310490490 | Pawl and ratchet type | 1 |
| 20120267968 | MOTOR - A motor may include a motor main body and an urging member. The urging member is provided with an end plate part having a plate spring part for urging the rotor and an engaging plate part which is extended along an outer peripheral face of a tube-like body part structuring an outer peripheral face of the motor main body. The engaging plate part is provided with a side plate part extended from the end plate part along the outer peripheral face of tube-like body part, a hook part which is bent from a tip end part of the side plate part to an inner side and is engaged with an opening part which is formed in the tube-like body part, and a pawl part which is bent from a tip end part of the hook part and is engaged with an inner peripheral face of the tube-like body part. | 10-25-2012 |
| 310490510 | Plural stators define stepping effect | 2 |
| 20110001367 | STEP MOTOR - Disclosed herein is a PM type step motor used to move a camera or an optical pickup lens of media related equipment. The step motor has a stator unit including first and second stators which butt against and are coupled to each other and each have a bobbin and a yoke attached thereto. Terminal blocks of the first and second stators are spaced apart from each other when the first and second stators are coupled to each other, thus allowing an automatic winding operation using winding equipment to be easily performed. The step motor includes a bushing which has in a central portion thereof a through hole through which a rotating shaft passes and is a two-stage structure having a small outer diameter part and a large outer diameter part, thus allowing the stator unit, the rotating shaft and a casing unit to easily be arranged coaxially. | 01-06-2011 |
| 20130334908 | STEPPING MOTOR, LENS APPARATUS, AND IMAGE PICKUP APPARATUS - A stepping motor includes a rotor having a rotor magnet fixed to a rotating shaft, a plurality of coil bobbins where coils are wound, a stator yoke group having a plurality of stator yokes each of which surrounds each of the plurality of coil bobbins in an axial direction and a radial direction of the rotating shaft, and the plurality of stator yokes each having pole teeth alternately arranged in a circumferential direction around the rotating shaft so as to be opposed to a side surface of the rotor magnet, and a magnetic attractive force generating member configured to attract the rotor magnet to the axial direction of the rotating shaft by a magnetic attractive force, and a magnetic center of the rotor magnet and a magnetic center of the stator yoke group coincide with each other. | 12-19-2013 |
| 310490530 | Permanent magnet defines stepping effect | 3 |
| 20110156506 | PERMANENT MAGNET-TYPE STEPPING MOTORS - A permanent magnet-type stepping motor broadly includes: a movable member (e.g., a rotor) having a number of magnetic poles on a surface thereof, with adjacent poles being of opposite polarity, the number of poles being a function of a constant, the number of phases and a desired step interval; and a stationary member (e.g., a stator) having a number of equally-spaced teeth arranged to face toward said movable member surface, each of said teeth having a plurality of fingers arranged to face toward said movable member surface, the number of said teeth being a whole integer that is a function of a constant, the number of said poles, the number of said fingers on each stator tooth, and the number of phases. | 06-30-2011 |
| 20110266894 | MANUFACTURING METHOD OF LAMINATED MAGNET FILM WITH SELF-BONDING LAYER - There is provided the manufacturing method of a laminated magnet film, including the steps of: a first step of preparing a magnet film, 40 μm to 300 μm in thickness, provided with a nanocrystalline structure magnetically isotropic; a second step of applying a self-bonding resin composition with film formability on the magnet film preparing a self-bonding magnet film composed of the magnet film and a self-bonding layer; a third step of mechanically processing the self-bonding magnet film being solid or hollow; a fourth step of preparing the laminated magnet film by laminating the self-bonding magnet films; a fifth step of melting the self-bonding layer of the laminated magnet film and then cooling and solidifying the self-bonding layer to integrally rigidify the laminated magnet film; and a sixth step of magnetizing the rigidified laminated magnet film. | 11-03-2011 |
| 20130093268 | PERMANENT-MAGNET STEPPING MOTOR - A stepping motor uses a low-cost ferrite magnet instead of an expensive rare-earth magnet. The stepping motor has characteristics equivalent or superior to those of a conventional stepping motor. The stepping motor is provided with a rotor | 04-18-2013 |
| 310490540 | Windings define stepping effect | 1 |
| 20140375151 | STEPPER MOTOR WITH INTEGRATED BRAKE AND DRIVE CIRCUIT - A stepper motor has a rotor, a stator and an electro-magnetic brake. The rotor has permanent magnet rotor poles. The stator has a stator winding with at least 2 phases. The brake is electrically connected to the phases of the stator winding and arranged to be released when at least one of the phases is energized. | 12-25-2014 |
| 310490550 | Start or stop locating feature (e.g., parking magnet, detent) | 4 |
| 20110148226 | Miniature Motor - A miniature motor includes a substrate having a pivotal portion. A coil unit and a detection element are provided around the pivotal portion. A rotor is rotatably mounted to the pivotal portion and includes a hub and a permanent magnet mounted to the hub and aligned with the coil unit and the detection element. The permanent magnet includes a plurality of north and south poles each having a stronger magnetism section. A weaker magnetism section is formed between two adjacent stronger magnetism sections. At least one auxiliary starting member is mounted between the substrate and the rotor and aligned with the permanent magnet. When the rotor stops rotating, the at least one auxiliary starting member aligns with and magnetically attracts at least one of the stronger magnetism sections, locating the detection element in a position not aligned with the weaker magnetism sections along an axis of the hub. | 06-23-2011 |
| 20130002062 | STEPPING MOTOR - A stepping motor includes a stator, a rotor which is rotatable to the stator, a rotor-side position regulation part which is fixed to the rotor and is rotated together with the rotor, and a stator-side position regulation part which is fixed to the stator. The rotor includes a rotary shaft, and a rotor magnet which is mounted on an outer periphery of the rotary shaft. The rotary shaft is integrally formed with the rotor magnet by resin. The stator-side position regulation part includes a first stator-side position regulation part which contacts the rotor-side position regulation part at a first position to regulate a rotation of the rotor in one direction, and a second stator-side position regulation part which contacts the rotor-side position regulation part at a second position different from the first position to regulate a rotation of the rotor in an opposite direction to the one direction. | 01-03-2013 |
| 20130278086 | STEPPER MOTOR WITH ADJUSTABLE DETENT TORQUE - A stepper motor has a rotor having a permanent magnet, a stator housing and a plurality of stator coil assemblies disposed within the stator housing. Each coil assembly has a bobbin, a coil wound about the bobbin, and two pole plates having pole fingers extending axially inside of the bobbin. The bobbin is disposed between the two pole plates and defines a space accommodating the rotor. A number of magnetic detent plates are disposed about the permanent magnet rotor. Each magnetic detent plate has a central opening accommodating the rotor and a plurality of projections extending inwardly, spaced about the central opening. The projections interact with the magnetic field of the rotor magnet. | 10-24-2013 |
| 20160065017 | BRUSHLESS MOTOR - The invention provides a brushless motor. A stator | 03-03-2016 |
