Class / Patent application number | Description | Number of patent applications / Date published |
310062000 | Suction pump or fan | 75 |
20080303361 | AUTOMOTIVE ALTERNATOR - A positive-side heatsink and a negative-side heatsink that constitute a rectifier are disposed inside a case at a rear end of a rotor so as to be separated axially such that front surfaces of a positive-side base portion and a negative-side base portion face each other. The negative-side heatsink is disposed such that radiating fins that are disposed so as to project from a rear surface of the negative-side base portion are positioned radially outside a cooling fan so as to face a coil end of a stator coil. | 12-11-2008 |
20080315693 | CORDLESS POWER TOOL - To provide a cordless power tool which can suppress heat generation of a protection unit and prevent the erroneous operation. A cordless power tool | 12-25-2008 |
20090033161 | AIRFLOW COOLING PATTERN FOR BELT-DRIVEN VEHICLE ELECTRICAL POWER GENERATOR - A belt-driven electric machine for a vehicle includes a front housing including at least one front housing opening and a rear housing including at least one rear housing opening. The electric machine further includes at least one fan capable of urging cooling air into the electric machine through the at least one front housing opening and out of the electric machine through the at least one rear housing opening. A method for cooling a belt-driven electric machine for a vehicle includes urging cooling air into the electric machine at substantially the front of the electric machine. The cooling air is flowed substantially rearward in the electric machine, and heat is radiated from the electric machine into the cooling air. At least a first portion of the cooling air is expelled from the rear of the electric machine in a substantially axial direction. | 02-05-2009 |
20090039719 | Automotive alternator with cooling fan having projections for preventing foreign particles - An alternator of the present invention is mounted on an automotive vehicle to supply electric power to an on-board battery and electric loads. The alternator is composed of a housing, a stator fixedly held in the housing, a rotor rotatably supported in an inner bore of the stator, and other associated components. Alternating current generated in the stator is rectified into direct current and supplied to the on-board battery and electric loads. A cooling fan is connected to an axial end surface of the rotor. The cooling fan includes an annular portion extending in the axial direction to overlap with a bearing holder formed in the housing. A small annular gap is made between the annular portion and the bearing holder. Plural projections extending from the annular portion in the outer radial direction are formed integrally with the annular portion. Foreign particles are prevented from entering into the bearing by the annular portion having the projected portions. | 02-12-2009 |
20090085417 | Rotor assembly, in which at least one inter-claw space is sealed by the fan - The invention relates to a rotor assembly which is mounted such as to rotate around an axis of rotation (X-X′) and which comprises two magnet wheels with claws ( | 04-02-2009 |
20090179510 | Rotating Electrical Machine - A rotating electrical machine main body | 07-16-2009 |
20090184593 | Rotor for vehicle alternator - A vehicle alternator is disclosed as having a rotor including magnetic pole pieces, each having claw-like magnetic pole fingers, a field coil wound on boss portions of the magnetic pole pieces, and cooling fans fixedly mounted on the magnetic pole pieces, respectively. Each cooling fan includes a central disc portion, a plurality of fan base portions formed on the central disc portion, and fan blades standing upright from the fan base portions in an axially outward direction, respectively. The central disc portion has an outer circumferential periphery formed with a plurality of cutout portions to be contiguous with roots of the fan base portions, respectively, and placed in areas radially inward of the fan blades, respectively. Each cutout portion is so placed to be perpendicular to the radial direction on which each claw-like magnetic pole finger is oriented. | 07-23-2009 |
20090230791 | DRIVE UNIT HAVING OPTIMIZED COOLING - The invention concerns an electric drive unit with a steering motor and a propulsion motor which are arranged co-axially with one another and which, respectively, steer a wheel of the vehicle or drive it in the sense of propulsive movement. A first motor ( | 09-17-2009 |
20090243407 | CONTROLLER-INTEGRATED ELECTRIC ROTATING MACHINE - In a controller-integrated electric rotating machine provided with a power circuit unit and a control circuit unit, a cooling property is improved so that the control circuit unit does not impair a flow of air for cooling the power circuit unit. | 10-01-2009 |
20090284087 | STARTER GENERATOR - A starter generator which comprises a rotor having a cuplike-shaped rotor yoke and magnets attached to an inner periphery of the rotor yoke, a stator mounted on a stator bracket and a protecting cover covering said rotor and stator, in which a hermetically sealed casing is constituted by said protecting cover and stator bracket, wherein a plurality of fans are provided on an outer surface of a bottom wall portion of said rotor yoke, a plurality of vent holes are provided through said bottom wall portion, said plurality of fans constitute a centrifugal fan which draws out air inside the rotor yoke through said vent holes and sends the air to an outer periphery of the rotor yoke, and a guide surface which guides the air sent to the outer periphery of the rotor yoke to a space inside the rotor yoke is provided on the stator bracket. | 11-19-2009 |
20090289513 | Cooling System for a Motor and Associated Electronics - A cooling system is provided for an electric motor having control circuitry and including a motor housing surrounding the motor. The motor drives at least one radial fan at one end thereof for directing airflow through the motor housing across the motor. A fan housing encloses the cooling fan and defines a diverter chamber radially outboard of the fan that is sized to divert a portion of the airflow away from the electric motor. A control box contains the control circuitry and includes a base having a heat sink for contacting the control circuitry. The base defines a plenum in communication with the diverter chamber and a channel in communication with the plenum and the heat sink to direct the diverted airflow across the heat sink. | 11-26-2009 |
20100026112 | ELECTRIC MOTOR - An electric motor has a stator and a rotor. The stator has a housing with inlets and outlets. The rotor has a shaft, a rotor core and a commutator. A fan is fixed to the rotor. An end cap is fitted to the housing to close a first end of the housing and support electrical components, including brush gear. The brush gear includes two brush assemblies, each comprising a brush for making sliding electrical contact with the commutator and a brush guidance mechanism for resiliently urging the brush into contact with the commutator. The brush assemblies are accommodated in compartments of the end cap. Each compartment has vents on an axially facing side thereof and openings in a transverse wall thereof. An air guide guides a part of the airflow generated by the fan exiting from at least one of the outlets of the housing to flow into the compartments via the openings and exit the compartments via the vents to cool the brushes. | 02-04-2010 |
20100102654 | ADAPTIVE COOLING UNIT FOR A POWER TOOL - A cooling unit for a power tool comprises a fan wheel ( | 04-29-2010 |
20100117466 | DEVICE FOR RECTIFYING THE CURRENT OF AN ELECTRIC ROTARY MACHINE AND ROTARY ELECTRIC MACHINE INCLUDING SUCH DEVICE - A device for rectifying the current of a rotary electric machine comprising a bearing ( | 05-13-2010 |
20100117467 | EXCITER MACHINE COMPRISING AN AUXILIARY EXCITER MACHINE - An exciter machine including an auxiliary exciter machine and a fan is provided. The fan is arranged on one side of the exciter machine and includes a mount ring on the external circumference on which permanent magnets are arranged in order to form an auxiliary rotor. The auxiliary rotor is moved within an auxiliary exciter stator. | 05-13-2010 |
20100133933 | COOLING ARRANGEMENT FOR AN ELECTRICAL MACHINE - A cooling arrangement is disclosed for an electrical machine in which the main cooling air circulation within the machine is arranged using a centrifugal blower in at least one of the ends of the machine, making the main cooling air circulation flow through at least an air space in the machine and the outer surface of the stator. A circulating fan is arranged in the immediate vicinity of the centrifugal fan for the purpose of generating a coil end circulation that circulates air at least in the area of the machine's coil ends. | 06-03-2010 |
20100141063 | Cooling frame for electric motors - A housing for an electric motor, the housing including a substantially cylindrical shaped frame having a first and second opposing ends and a longitudinal axis running between the first and second opposing ends, and a plurality of air flow outlets each having a longitudinal axis, the plurality of air flow outlets being radially disposed about a circumference of the frame such that the longitudinal axis of each of the plurality of air flow outlets is located in a plane that is substantially orthogonal to the longitudinal axis of the frame. | 06-10-2010 |
20100171379 | VEHICLE AC GENERATOR - There is provided a vehicle AC generator in which the contact face of at least one of a pair of cases that make contact with the respective axis-direction end faces of a stator core is provided with a cooling air path that connects the outer circumferential surface of a coil end portion with the outer circumferential surface of the stator core and has an opening in the axis direction at the outer circumferential surface of the stator core so that the coolability of the coil end portions of the stator coil is raised, and the amount of cooling air is increased so that the overall coolability of the AC generator is improved. | 07-08-2010 |
20100213775 | High power density generator - A high power density generator includes a rotor assembly, a rectifier assembly, and a cooling assembly configured in such a way so as to provide high electrical output power while retaining a small profile. The rotor assembly includes one or more rings configured to secure the main rotor windings to the main rotor poles by imparting a clamping force therebetween while conforming to the windings' profile allowing for operation at high RPM and high levels of shock and vibration. The rotor assembly may further include a rotating rectifier assembly positioned so as to reduce the moment arm between the mass centers of the rotor assembly and the drive-end bearing. The rectifier assembly comprises a rectifier housing and one or more rectifiers which are placed radially so as to dissipate heat directly into the airstream. The cooling assembly, comprising a fan and a shroud, is placed adjacent to the rectifier assembly providing immediate cooling of the rectifier. | 08-26-2010 |
20100225184 | SERVO MOTOR WITH IMPROVED HEAT DISSIPATION EFFICIENCY - A servo motor includes an enclosure defining airflow passages in the outer surface thereof, an end cover attached to the enclosure, a rotor shaft accommodated in the enclosure and having an end protruding out of the end cover, an encoder attached to the protruding end of the rotor shaft, an encoder cover attached to the end cover and covering the encoder, a fan duct covering the end cover, and a fan attached to the fan duct. The end cover, the encoder cover, and the fan duct cooperatively define an airflow space communicating with the airflow passages of the enclosure. The encoder cover includes a guiding portion gradually shrinking toward a small end which is away from the end cover. The fan duct includes a guiding portion gradually shrinking toward an end to which the fan is attached, thereby to guide the airflow smoothly flow toward the fan. | 09-09-2010 |
20100270877 | ELECTRIC POWER TOOL WITH AN ELECTRIC MOTOR - The invention relates to an electric machine tool, particularly an angle grinder, having an electric motor that can be forcibly cooled by a cooling air flow. The electric motor includes an armature and a field iron package disposed concentrically to the armature which are disposed in a cooling air flow. The invention proposes that the armature and the field iron package be disposed in series in the cooling air flow. | 10-28-2010 |
20100283336 | VENTILATING SYSTEM FOR ELECTRICAL ROTATING ELECTRICAL MACHINES EQUIPPED WITH A FORCED-FLUID FLOW COOLING DEVICE AND ROTATING ELECTRICAL MACHINE COMPRISING SAME - The invention concerns a ventilation system for a rotary electrical machine of the type comprising a rotor mounted so as to rotate in a stator and a device for cooling by forced flow of a cooling fluid, such as air, provided with at least one fan fixed to the rotor and an independent fan ( | 11-11-2010 |
20100295390 | STATOR FOR A POLYPHASE ELECTRIC MACHINE AND METHOD FOR MANUFACTURING SAME | 11-25-2010 |
20100301689 | BRUSHLESS AC GENERATOR FOR VEHICLE - To provide a brushless AC generator for a vehicle, which is capable of improving a cooing performance for an excitation coil and increasing an output of electric power generation with a simple structure. | 12-02-2010 |
20110006622 | ELECTRIC MACHINE HAVING A TWIN AXIAL FAN - An electric machine with improved cooling efficiency includes a stator, a rotor operating as a rotor fan and comprising a shaft defining an axial direction and having radial and axial cooling channels, and an axial fan configured as a twin axial fan and arranged coaxially with the shaft and supplying a coolant to the axial cooling channels. The axial fan has first and second blade rings and a funnel-shaped tube with a smaller opening directly connected to the axial cooling channels of the rotor to deliver coolant to the axial cooling channels of the rotor, and a larger opening, which is non-rotatably connected to and encloses the first blade ring. The second blade ring is firmly attached at an outer circumference of the funnel-shaped tube to deliver the coolant to the stator. Both the stator and the rotor can be cooled using an efficient coolant flow. | 01-13-2011 |
20110037330 | ELECTRIC MACHINE INCLUDING A MULTI-CHANNEL FAN - The present invention relates to an open rotary electric machine having a rotor mounted to rotate relative to at least one stator and co-operating with the stator to define at least one airgap, the rotor being suitable for rotating at least one fan having at least two channels, said fan including a first channel generating a first cooling air stream passing through the stator, and a second channel generating a second cooling air stream passing through the rotor, the fan including a solid web separating the first and second air streams. | 02-17-2011 |
20110074235 | AIR COOLED ELECTRIC MOTOR - An electric motor assembly. A stator includes a set of windings and has a first end, a second end, and an outer radial surface. A rotor includes a shaft having an axis. A first frame supports the shaft at a first axial position. A canopy substantially surrounds the first frame. The canopy includes a fluid inlet and a fluid discharge. A second frame supports the shaft at a second axial position and includes at least one fluid outlet. A chute is positioned downstream of the canopy fluid discharge. The chute directs fluid flow along the outer radial surface of the stator towards the fluid outlet. A fan is coupled to the shaft downstream of the fluid outlet for rotation with the shaft. | 03-31-2011 |
20110101803 | BRUSHLESS ROTARY ELECTRIC MACHINE - Provided is a brushless AC generator for a vehicle, with improved cooling performance for an exiting core and an exciting coil. In the brushless AC generator for the vehicle, a rotor includes: magnetic-pole cores fixed to a shaft; a cylindrical exciting core fixed to a rear bracket, the exciting core being inserted into one of the magnetic-pole cores; and an exciting coil formed by winding a conductor around a minor-diameter portion of the exciting core. The rear bracket includes: vent holes for the rotor, through which cooling air generated by rotation of a cooling fin passes, the vent holes for the rotor being formed around a bearing housing portion for housing a rear bearing therein; and a guiding portion including an air duct for guiding the cooling air, which has passed through the vent holes for the rotor, to the exciting core. | 05-05-2011 |
20110148230 | Electric Motor, Especially External Rotor Motor - An electric motor has a stator bushing in which components that generate heat are disposed. A rotor housing that has at least one air conveying element is rotatably connected to the stator bushing. The air conveying element has a top side that is facing the stator bushing and that is at least basically smooth. The air conveying element has an annular disk that is provided with the basically smooth top side. The air conveying element has flow guiding elements that are radially extending ribs provided on the bottom side of the annular disk. | 06-23-2011 |
20110156511 | ELECTRIC MOTOR - An electric motor has a stator and a rotor rotatably mounted in the stator. The rotor has a shaft and a fan mounted on the shaft. A air guide structure with an axial extension portion is arranged at one end of the stator adjacent the fan. The gap between the axial extension portion and the fan in the axial and/or radial direction of the motor is narrow in order to reduce air swirl generated by air flowing from the outlet of the fan to the inlet of the fan through the gap. Preferably, the width of the gap is larger than 0.05 mm and smaller than 2.0 mm. The cooling efficiency of the fan is increased and the performance of the motor is improved. | 06-30-2011 |
20110169354 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes a rotor and a stator including an annular stator core formed by helically stacking a plurality of core pieces that are connected to each other by connecting portions, the rotor being disposed inside an inner periphery of the stator core. The connecting portions are linearly arranged along a stacking direction of the stator core so that grooves that extend in the stacking direction of the stator core are formed in an outer peripheral surface of the stator core at positions where the connecting portions are provided. | 07-14-2011 |
20110175469 | AUTOMOTIVE ALTERNATOR - An automotive alternator is provided that reduces exclusive circumferential space for a regulator assembly inside a rear bracket, and that also increases performance in cooling the regulator assembly and a rectifier by ensuring that flows of air that cool the regulator assembly and the rectifier do not interfere with each other. | 07-21-2011 |
20110187212 | AUTOMOTIVE ELECTRIC MOTOR-GENERATOR WITH RADIAL PLATES AND CIRCUIT BOARDS DISPOSED IN A FAN SHAPE IN A COMMON PLANE AROUND SHAFT OF ROTOR - The present invention provides an automotive electric motor-generator that can achieve sufficient cooling of a radiating plate by ensuring a sufficient cooling airflow ventilation channel within limited axial or radial dimensions. In the present invention, first and second radiating plates each form a fan shape, have N-channel power MOSFETs mounted thereto, and have a drain potential for the power MOSFETs. A first circuit board includes insert conductors that connect the power MOSFETs in series, and a second circuit board has insert conductors that are connected to source terminals of the power MOSFETs and that have negative potential. The first radiating plate, the second radiating plate, the first circuit board, and the second circuit board are disposed in a fan shape that is centered around a shaft so as to line up radially in a plane that is perpendicular to the shaft outside one axial end of a rear housing. | 08-04-2011 |
20110193432 | POWER SUPPLY UNIT-INTEGRATED DYNAMOELECTRIC MACHINE - A dynamoelectric machine main body that includes: a housing that is constituted by a rear bracket and a front bracket; a rotor; a stator; and a fan, and a power supply unit that is mounted integrally onto the dynamoelectric machine main body are included, the power supply unit is disposed between the fan and a bottom portion of the rear bracket, and the power supply unit is disposed between the fan and a bottom portion of the rear bracket, and the rear bracket has: air discharge ports that are formed on portions that are positioned radially outside the fan; and air suction ports that have openings nearer to a bottom portion than the power supply unit, and includes a partitioning member for configuring a ventilation channel that extends from the air suction ports to the air discharge ports that is disposed between the power supply unit and the fan. | 08-11-2011 |
20110266897 | Electric Machine - An electric machine is provided. The electric machine includes a stator, a rotor and a closed cooling channel through which a gaseous cooling medium circulates. The stator includes a stator lamination at least partially encasing several stator windings. The closed cooling channel is disposed in circumferential direction of the stator lamination. The stator lamination is at least partially formed as fins. | 11-03-2011 |
20110266898 | Cooling System for a Motor and Associated Electronics - A cooling system is provided for an electric motor having control circuitry and including a motor housing surrounding the motor. The motor drives at least one radial fan at one end thereof for directing airflow through the motor housing across the motor. A fan housing encloses the cooling fan and defines a diverter chamber radially outboard of the fan that is sized to divert a portion of the airflow away from the electric motor. A control box contains the control circuitry and includes a base having a heat sink for contacting the control circuitry. The base defines a plenum in communication with the diverter chamber and a channel in communication with the plenum and the heat sink to direct the diverted airflow across the heat sink. | 11-03-2011 |
20110273041 | ELECTRICITY-GENERATING DEVICE - An electricity-generating device has a rotator unit has a rotator, multiple magnetic strips and a shaft and has a stator unit comprising multiple annular steel sheets, a positioning post, multiple dividing boards, multiple insulating sheets, an inner coil and an outer coil. The shaft is connected to a drive motor and receives power from the drive motor so that the rotator unit rotates inside the stator unit of energy-generating device. By continuously shearing to perform electromagnetic inducement interaction, induced current is generated to output and to supply battery charge and outside electrical consumption or to actuate multiple electricity-generating modules arranged in parallel. | 11-10-2011 |
20110316369 | ROTOR FAN FOR AN ELECTRIC MACHINE - An electric machine includes a rotor. The rotor includes a body having a number of pole members, a central hub, and a plurality of mounting members. The plurality of mounting members are fewer than half the number of pole members. A fan member is mounted to the rotor. The fan member includes a number of fan blades that project outward from a hub portion. A plurality of mounting elements are provided on select ones of the number of fan blades. The plurality of mounting members engage respective ones of the plurality of mounting elements to attach the fan member to the rotor. | 12-29-2011 |
20120001505 | ELECTRIC MACHINE - Electric machine, in particular an electric motor, which comprises a motor support, a stator, a rotor, a fan arranged at the face end of said motor and an electronics casing disposed adjacent to the motor support for electronic components to be arranged in wherein a face-end wall of the motor support which is assigned to the fan is provided with an axial opening such that an air stream discharged from the motor support is by means of said fan deflected toward the electronics casing. | 01-05-2012 |
20120112575 | INTEGRATED PERMANENT MAGNET ALTERNATOR AND COOLING FAN - A permanent magnet alternator includes a permanent magnet alternator stator attached to a housing. A shaft is rotatable with respect to the housing with a permanent magnet alternator rotor attached to the shaft. The permanent magnet alternator rotor is positioned with respect to the permanent magnet alternator stator so as to generate electricity when the shaft rotates. A cooling fan is also attached to the shaft and is positioned in a gas flow path for flowing air through the gas flow path. | 05-10-2012 |
20120133223 | BRUSHLESS DC MOTOR STRUCTURE - A brushless DC motor structure including a motor body, a controller, and a fan radiator. The fan radiator is mounted between the motor body and the controller to disperse heat from the motor body and the controller. The brushless DC motor structure increases air flow on the surface of the motor body and the controller by the fan radiator and speeds up heat dispersion, and meanwhile effectively controls the operating temperature of the motor body and the controller. Thus, the brushless DC motor structure has an excellent heat dispersion capability, and the failure rate thereof has been largely reduced. | 05-31-2012 |
20120248908 | Cooled Fan Motor And Method Of Operation - A cooled fan motor may include an elongate housing adapted to be attached to a tankhead, the housing having at least one longitudinally extending groove, a shaft rotatably attached to the housing, a hub attached to the shaft, the hub having at least one opening therethrough and shaped to form a gap with a tankhead attached to the housing, a rotor attached to the hub, and a stator mounted on the housing such that the groove in the housing forms an air passage between the housing and the stator connecting the gap and the opening. Air external to the motor is able to enter through the gap between the hub and tankhead, flow along the air passage formed by the groove in the housing and exit the motor through the opening in the hub, thereby cooling an interior of the motor. In one aspect, the hub includes radially extending blades such that when the stator is energized, rotation of the hub and blades causes air to enter through the gap, flow along the air passage and exit the motor through the opening in the hub. The groove in the housing may be adjacent bearings carried in the housing for supporting the shaft, such that air movement during operation of the motor may cool the bearings and bearing lubricant and thereby prolong bearing life. | 10-04-2012 |
20120280582 | Method and Arrangement for Cooling Claw-Pole Electric Machines - An electric machine includes a stator and a rotor configured to rotate about an axis of rotation in a direction of angular rotation. The rotor includes a first claw-pole segment and an opposing second claw-pole segment. The first claw-pole segment includes a plurality of fingers extending from an end ring. Each finger includes a distal end and a proximal end with the proximal end fixed to the end ring. Each finger also includes an interior side and an exterior side with the exterior side facing the stator. A leading side and a trailing side are defined on each finger by the direction of angular rotation. A chamfer is formed on the exterior trailing side of each finger at the proximal end of the finger. | 11-08-2012 |
20120299405 | ELECTRIC MOTOR - An electric motor includes an inner stator including inner magnetic poles arranged circumferentially, an outer stator including outer magnets arranged circumferentially, and a rotor rotatably disposed between the inner and outer stators. The rotor includes a shaft, a rotor core fixed to the shaft and a winding wound on the rotor core. The rotor core includes a ring shaped yoke having a plurality of inner teeth extending inwardly and a plurality of outer teeth extending outwardly. The winding includes a plurality coils each including an inner side received in a corresponding inner slot formed between adjacent inner teeth and an outer side received in a corresponding outer slot formed between adjacent outer teeth. | 11-29-2012 |
20120299406 | WASHING MACHINE - A washing machine is disclosed. An object of the present invention is to provide a washing machine which can radiate the heat generated from the stator outside, regardless of a rotational direction of a rotor. | 11-29-2012 |
20120306300 | VEHICLE AC GENERATOR - Vehicle AC generator comprises a stator comprising stator windings; front frame and rear frame, each rotatably supporting a rotor in the stator via a space on an inner circumference thereof; cooling fan fitted to the rotor; first polarity arm configured to rectify a current of one polarity; second polarity arm configured to rectify a current of another polarity; rectifier device configured to rectify an alternating current generated in stator windings; protective cover covering rectifier device. Rectifier device comprises first heat dissipating plate having rectifier elements forming first polarity arm, second heat dissipating plate rectifier elements forming second polarity arm, and connection plate formed in waveform-like shape and disposed between the first and second heat dissipating plates, and passage of a cooling air blown by the cooling fan formed between first heat dissipating plate and connection plate and between second heat dissipating plate and connection plate. | 12-06-2012 |
20120313466 | DRIVE MOTOR HAVING INTEGRATED COOLING - A drive motor, in particular for a fan wheel of a radiator of a motor vehicle, is provided. The drive motor comprising a stator, and a rotor rotating about an axis of rotation relative to the stator, which is driven in cooperation with the stator. Means for generating an air flow for cooling at least one component of the drive motor are arranged on the rotor. | 12-13-2012 |
20130009497 | MOTOR HOUSING WITH AN AIR-COOLING CAPABILITY - A motor housing has a heat-dissipating casing having an outer casing and an inner casing. The outer casing is tubular and has an inner surface. The inner casing is tubular, is co-axially mounted in the outer casing and has multiple fins and multiple baffle ribs. The fins are formed on and protrude radially from an outer surface of the inner casing. The baffle ribs are formed on and protrude radially from the outer surface of the inner casing and are connected to the inner surface of the outer casing to form multiple air passages between the inner surface of the outer casing and the outer surface of the inner casing. Each baffle rib has two ends and a front threaded hole and a rear threaded hole defined respectively in the ends of the baffle rib. | 01-10-2013 |
20130015734 | MAGNETIC COUPLER - A magnetic coupler comprises a magnet rotor that includes a permanent magnet; a conductor rotor that includes a non-ferrous electroconductive plate; and a fan mounted on one of the magnet rotor and the conductor rotor, wherein the fan is designed to blow air into the magnetic coupler during operation. The permanent magnet of the magnet rotor is spaced by an air gap from the electroconductive plate of the conductor rotor. | 01-17-2013 |
20130026868 | Electric Machine With Enhanced Cooling - An electric machine includes a casing have a first end plate and a second end plate, the first end plate having an air inlet and the second end plate having an air outlet; an outer rotor positioned inside the casing; a stator positioned inside the outer rotor; a hub positioned inside the stator; a fan positioned within the casing, the fan drawing air from the air inlet and exhausting air out the air outlet. | 01-31-2013 |
20130106211 | ROTOR FOR ELECTRICAL MACHINE, IN PARTICULAR FOR A SYNCHRONOUS MOTOR | 05-02-2013 |
20130113312 | Method and Apparatus for Fastening Cooling Fans to Electro-Mechanical Machines - A rotor arrangement for an electric machine comprises a rotor shaft and a rotor segment coupled to the rotor shaft. The rotor segment includes a main body and a collar integral with the main body. The collar includes an outer peripheral groove adjacent to the main body portion of the rotor segment. The rotor arrangement further includes a cooling fan that has a center opening defined by an inner perimeter. The center opening of the fan is configured to slidably engage the collar and is adjustable between an insertion diameter and a locking diameter. When the center opening is at the locking diameter, at least a portion of the inner perimeter of the fan extends into the outer peripheral groove in the collar such that the fan is retained on the rotor segment. | 05-09-2013 |
20130162070 | AC LOW-VOLTAGE INDUCTION MOTOR - An AC low-voltage induction motor contains a rotor having a central shaft; a stator having a plurality of silicon steel pieces and a number of coil sets, each silicon steel piece having a groove to receive the coil set; a number of supports inserted into four corners of a front cover and four corners of a rear cover to connect the rotor, the stator, and a fan together; wherein a diameter and a number of the coil set is capable of determining a supply amount of a working voltage. | 06-27-2013 |
20130169082 | FAN MOTOR ASSEMBLY - Disclosed herein is a fan motor assembly. A motor includes a rotor unit and a stator unit. An impeller is provided on an upper end of a motor shaft of the motor. The impeller is rotated by the motor to suck air. The impeller includes a pair of plates that face each other, and a plurality of blades that are disposed between the plates at positions spaced apart from each other at regular intervals. A diffuser is disposed around an outlet formed in a periphery of the impeller. A motor housing encases the rotor unit and the stator unit therein. A sensing unit is provided on a lower end of the motor shaft that extends outwards from the motor housing. The sensing unit senses the rotation of the rotor unit. An inductor is installed in the motor housing. | 07-04-2013 |
20130342051 | AIR COOLED ELECTRIC MOTOR - An electric motor assembly. A stator includes a set of windings and has a first end, a second end, and an outer radial surface. A rotor includes a shaft having an axis. A first frame supports the shaft at a first axial position. A canopy substantially surrounds the first frame. The canopy includes a fluid inlet and a fluid discharge. A second frame supports the shaft at a second axial position and includes at least one fluid outlet. A chute is positioned downstream of the canopy fluid discharge. The chute directs fluid flow along the outer radial surface of the stator towards the fluid outlet. A fan is coupled to the shaft downstream of the fluid outlet for rotation with the shaft. | 12-26-2013 |
20140028125 | OUTER ROTOR TYPE MOTOR - To provide an outer rotor type motor configured so that the lead wires of the winding coils for the stators are routed simply. An outer rotor type motor is provided with stators arranged in the axial direction, a rotor supported so as to rotate around the stators, a drive shaft provided integrally with the rotor, winding coils respectively wound on the stators, and magnets affixed to the rotor so as to respectively correspond to the stators. The outer rotor type motor is configured so that the rotor and the drive shaft are rotated by the magnetic action between the winding coils and the magnets. A penetration portion extending in the axial direction is provided in at least one of the stators, and the lead wires of the winding coils are inserted through the penetration portion and led to the outside. | 01-30-2014 |
20140111042 | HOUSING UNIT AND ELECTRIC MACHINE COMPRISING A HOUSING UNIT - An embodiment of the invention relates to a housing unit for an electric machine, including at least one housing and at least one flow device for generating at least one first flow of a fluid, the flow device being arranged inside the at least one housing. According to an embodiment of the invention, the at least one flow device includes at least one fan, which has at least one opening and a Coanda surface, wherein the Coanda surface is arranged in the region of the opening, whereby the first flow of the fluid exits from the at least one opening in a predetermined direction and whereby at least one component, which can be arranged in the housing, can be subjected to incident blowing in a targeted manner. | 04-24-2014 |
20140191597 | ENHANCED COOLING OF ENCLOSED AIR COOLED HIGH POWER MOTORS - A fully enclosed fan motor assembly includes a motor housing. A stator is located radially inward from the motor housing. A rotor is located radially inward from the stator, and the gap in between the rotor and stator defines a rotor stator gap. A shaft is located radially inward from the rotor. A fin portion extending radially outward from the shaft is used to dissipate heat from the rotor to air drawn through the rotor stator gap and over the fin portion. | 07-10-2014 |
20140312723 | ELECTRIC MOTOR FOR VEHICLE - In an electric motor for a vehicle, a fan integrally rotatable with a rotor is located on one end in a direction of the axis of the rotor, a bracket for accommodating the fan is joined on one end in the direction of the axis of a stator frame for accommodating a stator, and the bracket is provided with an outside air inlet and a dust emission outlet. The bracket is provided with an expanded section which has an inner peripheral surface bulging on an outer peripheral side in a radial direction beyond a peripheral surface of the stator frame, and at least a part of the dust emission outlet opens to the inner peripheral surface of the expanded section. | 10-23-2014 |
20140368066 | AIR COOLING OF A MOTOR USING RADIALLY MOUNTED FAN - A motor cooling system is provided comprising an electric motor including a rotor having first and second axial ends, and a stator having first and second axial ends, a motor housing surrounding the motor including an air chamber extending around the motor and axially along the motor length, a motor enclosure enveloping the motor housing, and a cooling fan radially mounted to the motor enclosure and adapted to operatively cool said electric motor. | 12-18-2014 |
20140368067 | ROTOR FOR ROTATING ELECTRIC MACHINE - A rotor is provided for a rotating electric machine. The rotor includes a magnetic pole core and a cooling fan. The cooling fan includes a base plate laser-welded to an axial end face of the magnetic pole core and a plurality of fan blades extending from the base plate. Further, in the rotor, a weld formed between the base plate of the cooling fan and the magnetic pole core has a pair of open ends. | 12-18-2014 |
20150008771 | MOTOR HAVING COOLING MEANS - A motor has a stator and a rotor rotating at the center of the stator, and the rotor includes a concave groove formed with a predetermined depth along the circumference of the rotor, and a plurality of blades formed at the concave groove to protrude therein and having a height not greater than the depth of the concave groove, wherein a flow channel is formed between the stator and the rotor along the length direction of the rotor so that air flows therein, and wherein when the rotor rotates, the plurality of blades guides an air flow to the flow channel so that the rotor is cooled. | 01-08-2015 |
20150061428 | AXIAL GAP-TYPE POWER GENERATOR - An axial gap-type power generator in an embodiment includes a rotor provided with a magnet and a stator provided with a coil, the rotor and the stator being arranged via a gap in an axial direction of a rotation shaft. Further, a blade is installed at the rotor and the blade generates a cooling wind by rotation of the rotor. Here, the blade is installed at the rotor so that the cooling wind flows through the gap between the rotor and the stator from an inside to an outside in a radial direction of the rotation shaft. | 03-05-2015 |
20150137633 | AC GENERATOR - A vehicle AC generator capable of enhancing a cooling effect by increasing an air volume of cooling air is obtained. The AC generator includes: a casing having a ventilation port on an outer periphery; a stator installed in the casing; a rotor supported in the stator in a rotatable manner; a fan installed oppositely to the ventilation port in the casing and rotated integrally with the rotor; and a protrusion formed on a surface of the casing opposing a tip end of the fan at a position adjacent to an outer periphery of the ventilation port of the casing. | 05-21-2015 |
20150295470 | SELF-COOLED MOTOR - A self-cooled motor includes a rotor holder including a cylindrical portion and a bottom plate portion, and configured to rotate with a shaft; a housing supporting a bearing and a stator; and at least one blade rotating together with the shaft to generate an air current traveling radially outward, at least a portion of each blade being located axially below the bottom plate portion of the rotor holder. The housing includes a base portion axially above the rotor holder and an outlet edge portion in the housing and between adjacent ones of the attachment portions, and configured to define a main air outlet axially below, the main air outlet connecting a space radially inside the housing and a space radially outside the housing with each other. The bottom plate portion of the rotor holder includes a rotor vent hole passing therethrough in an axial direction. | 10-15-2015 |
20150295471 | SELF-COOLED MOTOR - A self-cooled motor includes a shaft; a rotor; a stator radially opposite the rotor; a housing supporting a bearing and the stator; and an impeller located axially below the rotor, and configured to rotate together with the shaft to generate an air current. The housing includes a base portion located axially above the rotor; two or more attachment portions radially outward of the rotor; and a cylindrical or substantially cylindrical cover portion configured to join the base portion and the attachment portions. A lower end of each attachment portion is located at an axial level lower than an axial level of the impeller. The base portion includes an air inlet. The cover portion includes an air outlet located between adjacent ones of the attachment portions, and configured to connect a space radially inside the housing and a space radially outside the housing with each other. | 10-15-2015 |
20150303753 | OUTER ROTOR BRUSHLESS MOTOR - An outer rotor for a brushless motor has an end plate; a shaft fixed to a rotary center of the end plate; and an annular rotor core having one end connected to the end plate. A plurality of connecting bars connect the rotor core to the end plate. Permanent magnets are fixed to an inner surface of the rotor core. The end plate has an outer diameter equal to or less than the outer diameter of the rotor core. The end plate has a base plate, an annular sidewall, and a plurality of fan blades interconnecting the base plate and the sidewall. There are openings between the fan blades. The end plate is insert molded to the shaft and the connecting bars. | 10-22-2015 |
20150364957 | ELECTRIC MACHINE - The invention relates to an electric machine ( | 12-17-2015 |
20150364975 | ROTOR WITH HEAT SINK - A rotor for an electric motor has a shaft, a rotor core and rotor windings. The rotor core is fixed to the shaft and has a number of teeth. A winding slot is formed between adjacent teeth. The rotor includes a heat sink made of a thermally conductive material. The heat sink includes two annular portions and a plurality of connecting members connecting the two annular portions. The annular portions are located at respective axial ends of the rotor core. The connecting members are disposed in respective winding slots and are thermally connected with the rotor windings. | 12-17-2015 |
20160006325 | ELECTRIC MACHINE, IN PARTICULAR AN ENGINE - An electric machine, in particular an engine, has a housing with a bearing shield, a drive shaft, a fan which is coupled to the drive shaft, and a converter. The converter is arranged between the fan and the bearing shield. | 01-07-2016 |
20160020665 | ELECTRIC MACHINE HAVING A COUPLING FLANGE - The present invention concerns an electric machine (1), in particular an alternator, intended to be coupled to a driving or driven machine, in particular a heat engine, comprising:—a coupling flange ( | 01-21-2016 |
20160087510 | ROTARY ELECTRIC DEVICE FOR POWER WORKING MACHINE - In a rotary electric device for a power working machine capable of being braked by a brake mechanism, a cover having a bottomed cylindrical shape and covering a yoke of the device, includes: a cover cylindrical portion concentrically surrounding an outer peripheral surface of a cylindrical portion of the yoke with an annular clearance therebetween, and having an outer peripheral surface with which a brake shoe is capable of being placed in pressure contact; and a cover bottom wall portion continuous to one end of the cover cylindrical portion, and connected to a bottom wall portion of the yoke. A ventilation clearance communicating with the annular clearance is formed between the bottom wall portion and the cover bottom wall portion. Vent holes communicating the ventilation clearance with an outside of the yoke are provided through the bottom wall portion and the cover bottom wall portion. | 03-24-2016 |
20160094109 | INDUCTION MACHINE - An induction machine includes: a stator having a stator core and a coil; a rotor, which has a shaft, a rotor core secured to the shaft, and a secondary conductor; a bearing supporting the shaft; a cooling fan having a blade; and a cooling fan fixture. The secondary conductor includes a rotor bar and an end ring. The blade is located axially outward of the end ring, and the distal end of the blade in the axial direction extends axially outward of the coil end of the coil. The cooling fan has a securing portion located radially inward of the end ring and a cylindrical extended portion extending from the securing portion to the blade. The securing portion is secured to the rotor with the cooling fan fixture. The bearing is located axially inward of the distal end of the blade. | 03-31-2016 |
20160105068 | DUAL AIR AND LIQUID COOLING MEDIA COMPATIBLE ELECTRIC MACHINE ELECTRONICS - An electronic package adapted for connection to a rear frame member of an electric machine of liquid and/or air-cooled type. The electronic package includes a cooling tower having opposite first and second axial ends spaced along a package central axis. The cooling tower includes a metallic wall extending about the package central axis to define a radially outer wall surface. The cooling tower is at ground potential and defines a heat sink. The electronic package also includes a plurality of power modules mounted in conductive thermal communication to the cooling tower at positions on the radially outer wall surface. Heat transference to the cooling tower from each power module occurs along a respective primary cooling path. Transference along the primary cooling paths of heat from the cooling tower includes thermal convection to air and/or liquid. An electric machine of liquid and/or air-cooled type including an electronic package is also disclosed. | 04-14-2016 |
20160380514 | BRUSHLESS ELECTRICAL MACHINE WITH AIR COOLING - It is designed for operation as alternator and motor-alternator for mobile vehicles, as servomotor, as electric motor for electric cars and others. It has reduced overall dimensions in two mutually perpendicular directions while maintaining power. A part of the outer surface of the stator / | 12-29-2016 |