Class / Patent application number | Description | Number of patent applications / Date published |
318700000 |
SYNCHRONOUS MOTOR SYSTEMS
| 2572 |
318560000 |
POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS)
| 669 |
318445000 |
AUTOMATIC AND/OR WITH TIME-DELAY MEANS (E.G., AUTOMATIC STARTING AND/OR STOPPING)
| 424 |
318494000 |
ARMATURE (OR PRIMARY) CIRCUIT CONTROL
| 405 |
318139000 |
BATTERY-FED MOTOR SYSTEMS
| 391 |
318727000 |
INDUCTION MOTOR SYSTEMS
| 365 |
318490000 |
WITH SIGNALS, METERS, RECORDERS OR TESTING DEVICES
| 255 |
318362000 |
BRAKING
| 226 |
318003000 |
WITH PARTICULAR MOTOR-DRIVEN LOAD DEVICE
| 147 |
318116000 |
NONMAGNETIC MOTOR
| 140 |
318034000 |
PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS
| 116 |
318696000 |
OPEN-LOOP STEPPING MOTOR CONTROL SYSTEMS
| 106 |
318434000 |
LIMITATION OF MOTOR LOAD, CURRENT, TORQUE OR FORCE (E.G., PREVENTING OVERLOAD)
| 96 |
318135000 |
LINEAR-MOVEMENT MOTORS
| 76 |
318119000 |
RECIPROCATING OR OSCILLATING MOTOR
| 57 |
318432000 |
CONSTANT MOTOR CURRENT, LOAD AND/OR TORQUE CONTROL
| 50 |
318430000 |
MOTOR LOAD, ARMATURE CURRENT OR FORCE CONTROL DURING STARTING AND/OR STOPPING
| 45 |
318280000 |
MOTOR-REVERSING
| 35 |
318114000 |
IMPACT, MECHANICAL SHOCK, OR VIBRATION-PRODUCING MOTORS
| 31 |
318254100 |
SWITCHED RELUCTANCE MOTOR COMMUTATION CONTROL
| 28 |
318016000 |
SUPPLIED OR CONTROLLED BY SPACE-TRANSMITTED ELECTROMAGNETIC OR ELECTROSTATIC ENERGY (E.G., BY RADIO)
| 25 |
318255000 |
PLURAL DIVERSE MOTOR CONTROLS
| 24 |
318558000 |
MISCELLANEOUS
| 23 |
318140000 |
GENERATOR-FED MOTOR SYSTEMS HAVING GENERATOR CONTROL
| 20 |
318440000 |
HAVING PLURAL, DIVERSE OR DIVERSELY CONTROLLED SOURCES
| 20 |
318244000 |
ALTERNATING CURRENT COMMUTATING MOTORS
| 17 |
318538000 |
MOTOR STRUCTURE ADJUSTMENT OR CONTROL
| 15 |
318689000 |
TORQUING MOTORS
| 13 |
318438000 |
POWER FACTOR CONTROL OF ARMATURE OR LINE CIRCUIT
| 11 |
318162000 |
CONTROL BY PATTERNS OR OTHER PREDETERMINED SCHEDULE MEANS
| 9 |
318017000 |
PORTABLE-MOUNTED MOTOR AND/OR PORTABLE-MOUNTED ELECTRICAL SYSTEMS THEREFOR
| 7 |
318443000 |
PERIODIC, REPETITIOUS OR SUCCESSIVE OPERATIONS CONTROL OF MOTOR, INCLUDING "JOG" AND "INCH" CONTROL
| 7 |
318521000 |
FIELD OR SECONDARY CIRCUIT CONTROL
| 6 |
318001000 |
ELECTRIC MOTOR WITH NONMOTOR DRIVING MEANS (E.G., AXLE DRIVE, MANUAL DRIVE)
| 6 |
318161000 |
WITH FLYWHEEL OR MASSIVE ROTARY MEMBER
| 6 |
318443000 |
PERIODIC, REPETITIOUS OR SUCCESSIVE OPERATIONS CONTROL OF MOTOR, INCLUDING "JOG" AND "INCH" CONTROL
| 6 |
318437000 |
PHASING OR ANGULAR OR LINEAR POSITIONAL CONTROL OF MOVABLE ELEMENT OF THE MOTOR
| 6 |
318491000 |
CONTROL OF BOTH MOTOR CIRCUIT AND MOTOR STRUCTURE | 5 |
20080315818 | AXIAL GAP TYPE MOTOR/GENERATOR - An axial gap type motor/generator is provided with a stator, a rotor and an alternating current control device. The alternating current control device executes alternating current control of a single phase or multiple phase alternating current flowing in the coils. The alternating current control device includes a superpositioning control section and a frequency component control section. The superpositioning control section produces the alternating current by superpositioning a plurality of frequency components including a first order fundamental wave component and a plurality of higher harmonic wave components that have frequencies equal to integer multiples of a frequency of the fundamental wave components and are of orders that are equal to values of the integer multiples. The frequency component control section controls a relationship among the frequency components such that two pairs of the frequency components whose orders differ by two are aligned with respect to each other. | 12-25-2008 |
20090001917 | REDUCED-COMPLEXITY SELF-BEARING BRUSHLESS DC MOTOR - A method of commutating a motor includes operatively interfacing a stator and actuated component of the motor, arranging at least two winding sets relative to the actuated component, and independently controlling the at least two winding sets so that with the at least two winding sets the actuated component is both driven and centered. | 01-01-2009 |
20120081059 | ELECTRO-MECHANICAL DRIVE WITH EXTENDED CONSTANT POWER SPEED RANGE - Embodiments of the invention comprise a multi-input range box driven by multiple electric drives. Range shifting involves momentarily increasing the current through all but a given motor, to a level that will carry the entire load, comprising specified constant power. Simultaneously, torque of the given motor is reduced to zero. The given motor is then disconnected from supplying power, is synchronized to the input speed of the new speed range, and is then engaged for the new range. The above sequence is then repeated for each remaining motors, in turn. The motor current is re-equalized for all of the motors, after all the motors have been connected to provide power at the new range. Thus, there is no interruption in power flow during a range shift, and the motors are always used to deliver power, rather than to serve as a brake. | 04-05-2012 |
20120081060 | CONTROL APPARATUS FOR DRIVING APPARATUS - A control apparatus that controls a driving apparatus configured with a stator. A variable magnetic flux type rotating electrical machine has a first and second rotor, circumferential direction relative positions of which can be adjusted. A relative position adjustment mechanism adjusts the relative positions of the two rotors. A control command determination unit that determines, on the basis of a required torque and a rotation speed, an inter-rotor phase command indicating the relative positions for minimizing a system loss including at least an electrical loss, which includes a copper loss and an iron loss of the rotating electrical machine, and a mechanical loss of the relative position adjustment mechanism. A current command drives the rotating electrical machine. A control unit controls the rotating electrical machine on the basis of the current command and controls the relative position adjustment mechanism on the basis of the inter-rotor phase command. | 04-05-2012 |
20130009584 | VOLTAGE REGULATED PERMANENT MAGNET MACHINE - A permanent magnet generator comprises a stator core, a plurality of windings situated on the stator core, and a plurality of stress elements. The stress elements apply or relieve mechanical stress in response to control signals from a generator controller, thereby increasing or reducing voltage across the stator windings. | 01-10-2013 |
318493000 |
CONTROL OF BOTH ARMATURE (OR PRIMARY) CIRCUIT AND FIELD (OR SECONDARY) CIRCUIT | 4 |
20090091282 | ELECTRIC MOTOR CONTROL - A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The system includes aspects which permit, among other things, electromagnetically disconnecting a failed permanent magnet motor from said system, weight savings in motor control electronics, controllability benefits and other benefits. | 04-09-2009 |
20120306423 | MOTOR CONTROL SYSTEM IMPLEMENTING FIELD WEAKENING - A control system for use with a motor is disclosed. The control system may have a controller that is configured to receive a torque command for the motor and receive a rotor angular velocity signal indicative of an angular velocity of a rotor of the motor. The controller may also be configured to generate a field weakening command by adding a field weakening adjustment signal to the rotor angular velocity signal, and generate a torque voltage command and a flux voltage command based on the torque command and the field weakening command. Further, the controller may be configured to convert the torque voltage command and the flux voltage command into phase voltage commands and output the phase voltage commands. | 12-06-2012 |
20130033215 | APPARATUS AND METHOD FOR PERMANENT MAGNET ELECTRIC MACHINE CONDITION MONITORING - An apparatus and method for determining a condition of an electric machine. Search coils are wound around stator teeth and the induced voltage is used to decouple stator and rotor fluxes. The decoupled fluxes allow for machine condition monitoring and fault diagnosis. | 02-07-2013 |
20160197569 | METHOD AND DEVICE FOR DETERMINING PHASE CURRENTS AND AN EXCITATION CURRENT OF AN ELECTRICAL MACHINE, AND MOTOR SYSTEM | 07-07-2016 |
318115000 |
MOTOR WITH DIVERSE MOTIONS (E.G., ROTARY AND RECIPROCATING) | 3 |
20080297074 | LINEAR-ROTARY ACTUATORS, ACTUATOR SYSTEMS, AND METHODS OF OPERATION THEREFOR - In an embodiment, an actuator includes a plurality of stator windings adapted to produce a first stator magnetic field that translates along a stator axis, and to produce a second stator magnetic field that rotates around the stator axis. In addition, the actuator includes a rotor, coupled to a shaft, and positioned within a central stator channel. The rotor is adapted to produce a first rotor magnetic field that translates along a shaft axis and to produce a second rotor magnetic field that rotates around the shaft axis. An actuator system includes an actuator and an actuator controller unit, which is adapted to produce actuator inputs. An embodiment of a method for controlling the actuator includes providing actuator inputs to produce a translating magnetic field in the stator, a translating magnetic field in the rotor, a rotating magnetic field in the stator, and a rotating magnetic field in the rotor. | 12-04-2008 |
20090001907 | COMMUTATION OF AN ELECTROMAGNETIC PROPULSION AND GUIDANCE SYSTEM - A method of commutating a motor includes calculating an adjustment electrical angle, and utilizing the adjustment electrical angle in a common set of commutation equations so that the common set of commutation equations is capable of producing both one and two dimensional forces in the motor. | 01-01-2009 |
20120013275 | MOTOR FOR LINEAR AND ROTARY MOVEMENT - In summary, the present invention relates to a device, a method and a computer program enabling a rotating and translating movement by means of a single motor. An electric motor ( | 01-19-2012 |
318246000 |
SERIES MOTORS | 3 |
20110241577 | Electrical Power Tool for Operating with Alternating Current - The invention relates to an electrical power tool, particularly an electric hand power tool, for operating with alternating current, having an electric motor, and electronic control device, and an electrical power switch for actuating the electric motor, wherein the electronic control device comprises a bias voltage output and a detection input, connected to each other by means of a voltage divider comprising a summation point and to the side of the power switch facing the electric motor, and the control device is further designed such that the potential at the detection input is monitored after actuating the power switch and used for checking whether the power switch is conducting, and that it is actuated again if the power switch was not conducting or returned to the non-conducting state during the monitoring, and that said checking and any renewed actuation of the power switch is repeated within a half-wave of the alternating voltage. | 10-06-2011 |
20110068720 | DIRECT CURRENT MOTOR - A DC motor including a stator which includes a shell, a main magnetic pole and an exciting coil; a rotator disposed inside the stator; a brush holder disposed at an end of the shell; first and second carbon brushes disposed on the brush holder and contacted with the rotator respectively; a current direction controller disposed on the brush holder and connected with the first and second carbon brushes and first and second ends of the exciting coil respectively so as to control a direction of a current supplied to the exciting coil; and a cover disposed at the end of the shell so as to enclose the brush holder. The motor according to the present invention is compact in structure, small in volume, and occupies a small mounting space, and the work load of sealing and insulating is reduced, thus reducing the cost and improving the manufacture efficiency. | 03-24-2011 |
20120256570 | DRIVE DEVICE FOR SINGLE-PHASE SERIES COMMUTATOR MOTOR - A drive device of the present invention includes a pair of drive switches, a first diode, a switching element, a current detection unit, a capacitor, a second diode, and a current control unit. The first diode, the switching element, and the current detection unit are arranged, in this order from one end of an armature in a motor, on a braking current path that is formed of the armature and a field winding in the motor when the pair of drive switches is in a brake position. The second diode is adapted to keep allowing a braking current to flow through the field winding when the switching element is in an off-state by directly connecting a partial path between the switching element and the current detection unit on the braking current path and the other end of the armature. | 10-11-2012 |
318543000 |
THREE-OR-MORE-POSITIONS MOTOR CONTROLLER SYSTEMS | 3 |
20130033217 | ELECTRIC POWER TOOL - In an impact driver, a link unit (a link sleeve and first and second elongated protrusions) is provided between the mode switching ring for selecting an operation mode and the slide button for selecting the rotation speed. With the link unit, a switching operation of a slide button to the high-speed side is performed in coordination with a selecting operation of a mode switching ring to an impact mode or a vibration drill mode and the rotation speed is held at high speed. | 02-07-2013 |
20140049204 | ELECTRIC WORKING MACHINE - An electric working machine including: an input part; a control unit configured to control a motor in accordance with an operation amount of the input part; and a switching part; wherein, when a predetermined operation is performed to the switching part, the control unit shifts to a fixed control mode in which the motor is controlled in accordance with an operation amount of the input part at the time when the predetermined operation is performed to the switching part, irrespective of an operation amount of the input part after the predetermined operation is performed to the switching part. | 02-20-2014 |
20130207587 | Control System For Electrically Powered Vehicles - A circuit, for controlling a vehicle having an electric motor, the circuit comprising throttle means operable to generate an output signal; adjuster means operable to modify the output signal to above a predetermined minimum level, and controller means operable to receive the modified output signal and derive an input signal for provision to the electric motor. | 08-15-2013 |
318436000 |
NONRUNNING, ENERGIZED MOTOR | 2 |
20120001577 | TORQUE MOTOR DRIVING DEVICE FOR WIRE CUT ELECTRICAL DISCHARGE MACHINES - In a torque motor driving device for wire cut electrical discharge machines, a voltage waveform rectified by a full-wave rectifying circuit, not using a high-capacitance electrolytic capacitor, is applied as an AC voltage to a single-phase torque motor by a bridge circuit including semiconductor switches. A PWM signal whose duty is adjusted so that the current flowing through the torque motor matches an instructed value is generated and the generated PWM signal is used for the operation of the bridge circuit. | 01-05-2012 |
20140327382 | Electric Ratchet For A Powered Screwdriver - A powered screwdriver system includes an electric ratchet. In accordance with one aspect, the powered screwdriver system includes a driver housing and includes a motor disposed within the housing. A working end provides a rotational output and is mechanically coupled to the rotor. A power source provides power to the motor. A controller receives signals representative of a motor condition and, based on the received signals, controls the motor in a manner providing the electric ratchet. | 11-06-2014 |
318118000 |
MAGNETOSTRICTIVE MOTOR | 1 |
20140217932 | MAGNETOSTRICTIVE ACTUATOR - A method of minimizing the cold start delay and impact fatigue of an actuator includes calibrating the actuator by initially raising the temperature to a desired operating temperature through induction heating of the actuator rod. Additionally, a control system for a magnetostrictive actuator includes a rod of magnetostrictive material, a solenoid coil wrapped at least once around said rod, and a controller operatively connected to said solenoid coil wherein the controller detects an impact of the rod with another surface and adjusts the operation of the actuator to minimize the potential for additional future impacts. The rod may be segmented and include end caps to further reduce the potential for impact fatigue. | 08-07-2014 |
318383000 |
"ANTI-BRAKING" OR BRAKING-PREVENTION MEANS | 1 |
20090066274 | MOTOR CONTROLLER WITH HALL SENSOR MISALIGNMENT COMPENSATION - A technique can recover from motor stalls caused by misalignment of motor position sensors such as Hall-effect sensors. In a normal operating mode, a motor controller provides motor drive current to the motor windings based on the sensor signals according to a normal commutation sequence, and monitors for occurrence of a motor stall condition. Upon detecting the motor stall condition, the motor controller first momentarily drives the windings according to one of an advanced commutation state and a delayed commutation state each adjacent to the given commutation state in the normal commutation sequence, and determines whether the motor stall condition persists. If the stall condition persists, then the motor controller next momentarily drives the windings according to the other of the advanced commutation state and the delayed commutation state. By this action, the controller attempts operation at both preceding and succeeding portions of the torque characteristic, such that operation with increased torque is ensured even though the direction of the sensor misalignment is unknown. | 03-12-2009 |
20090066274 | MOTOR CONTROLLER WITH HALL SENSOR MISALIGNMENT COMPENSATION - A technique can recover from motor stalls caused by misalignment of motor position sensors such as Hall-effect sensors. In a normal operating mode, a motor controller provides motor drive current to the motor windings based on the sensor signals according to a normal commutation sequence, and monitors for occurrence of a motor stall condition. Upon detecting the motor stall condition, the motor controller first momentarily drives the windings according to one of an advanced commutation state and a delayed commutation state each adjacent to the given commutation state in the normal commutation sequence, and determines whether the motor stall condition persists. If the stall condition persists, then the motor controller next momentarily drives the windings according to the other of the advanced commutation state and the delayed commutation state. By this action, the controller attempts operation at both preceding and succeeding portions of the torque characteristic, such that operation with increased torque is ensured even though the direction of the sensor misalignment is unknown. | 03-12-2009 |
318136000 |
AUXILIARY MEANS FOR PRODUCING MECHANICAL STARTING OR ACCELERATING TORQUE | 1 |
20130293162 | CONTROL OF HEAVY MACHINES - The present invention relates to a system for controlling rotational speed on a rotating process machine, which for example is a turbine or a propeller, where the rotating process machine is connected to at least one motor and arranged to rotate with a given rotational speed given by the motor, the motor is connected to a control system and the rotational speed of the motor is arranged to be controlled by a control system. The rotating process machine comprises a load control arranged to be adaptable, the control system is connected to the rotating process machine. With the invention, one achieves soft transitions between several selectable rotational speeds and lower energy consumption by step by step adjusting the size and the rotational speed of the motor to varying energy requirement. | 11-07-2013 |
318492000 |
MOTOR MAGNETIC ENERGY DISSIPATION | 1 |
20100134062 | DC converter using motor coil - Circuits and methods system for a DC-to-DC conversion using the inductance of a motor coil are disclosed. The invention is especially applicable for mobile electronic devices having a motor and requiring a DC-to-DC conversion. By using the coil of the motor for DC-to-DC conversion and for the purpose of a motor no space for an additional coil is required. For motor control an H-bridge arrangement is provided allowing motor movement in both directions, to brake and free run. By adding two diodes and a capacitor and modulation of a switch of the H-bridge a DC-to-DC conversion has been made possible. | 06-03-2010 |
318383000 |
"ANTI-BRAKING" OR BRAKING-PREVENTION MEANS | 1 |
20090066274 | MOTOR CONTROLLER WITH HALL SENSOR MISALIGNMENT COMPENSATION - A technique can recover from motor stalls caused by misalignment of motor position sensors such as Hall-effect sensors. In a normal operating mode, a motor controller provides motor drive current to the motor windings based on the sensor signals according to a normal commutation sequence, and monitors for occurrence of a motor stall condition. Upon detecting the motor stall condition, the motor controller first momentarily drives the windings according to one of an advanced commutation state and a delayed commutation state each adjacent to the given commutation state in the normal commutation sequence, and determines whether the motor stall condition persists. If the stall condition persists, then the motor controller next momentarily drives the windings according to the other of the advanced commutation state and the delayed commutation state. By this action, the controller attempts operation at both preceding and succeeding portions of the torque characteristic, such that operation with increased torque is ensured even though the direction of the sensor misalignment is unknown. | 03-12-2009 |
20090066274 | MOTOR CONTROLLER WITH HALL SENSOR MISALIGNMENT COMPENSATION - A technique can recover from motor stalls caused by misalignment of motor position sensors such as Hall-effect sensors. In a normal operating mode, a motor controller provides motor drive current to the motor windings based on the sensor signals according to a normal commutation sequence, and monitors for occurrence of a motor stall condition. Upon detecting the motor stall condition, the motor controller first momentarily drives the windings according to one of an advanced commutation state and a delayed commutation state each adjacent to the given commutation state in the normal commutation sequence, and determines whether the motor stall condition persists. If the stall condition persists, then the motor controller next momentarily drives the windings according to the other of the advanced commutation state and the delayed commutation state. By this action, the controller attempts operation at both preceding and succeeding portions of the torque characteristic, such that operation with increased torque is ensured even though the direction of the sensor misalignment is unknown. | 03-12-2009 |