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7586286 |
Method and apparatus for motor control
A system and method for controlling a permanent magnet motor are disclosed. Briefly described, one embodiment receives a torque command and a flux command; receives information corresponding to a...
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7511439 |
Method for starting a sensorless, electronically commutatable direct current motor
A method for starting a sensorless, electronically commutatable direct current motor, having a permanent-magnetically excited rotor in which the stator carries a three-phase stator winding, whose...
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7358698 |
Field-winding type of synchronous machine
A field-winding type of synchronous machine comprises a stator with an armature winding wound phase by phase, a rotor having a rotor core with a field winding wound, and a circuit enabling an...
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7339344 |
Self tuning method and apparatus for permanent magnet sensorless control
A plurality of parameters of a Permanent Magnet Synchronous Motor (PMSM) is determined by a motor controller for differentiating between a plurality of PMSMs. This is achieved by first applying...
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7256563 |
Method and device for the sensor reduced regulation of a permanent magnet excited synchronous machine
A method and a device for providing field-oriented regulation of a synchronous machine excited by a permanent magnet, in which a direct-axis voltage component and a quadrature-axis voltage...
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7180263 |
Synchronous motor control method and device
Synchronous motor controlling apparatus and method controls power applied to minimize or eliminate speed variations of a synchronous motor due to variations in load imposed the motor. The...
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7026783 |
Drive system
A drive system includes a central power supply with a line-commutated converter and a DC/DC converter connected downstream of the line-commutated converter, and a plurality of inverters, each...
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6984958 |
Method for defining quadrature-axis magnetizing inductance of synchronous machine
Method for defining quadrature-axis magnetizing inductance of a synchronous machine, the synchronous machine being supplied by an inverter. The method comprises steps, wherein the synchronous...
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6979975 |
Rotation state detecting apparatus of a synchronous machine
In a conventional rotation state detecting apparatus of a synchronous machine, since short-circuiting must be carried out twice or more when a rotation speed is detected, there have been problems...
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6924617 |
Position sensorless control algorithm for AC machine
A control system for an electric motor having a stator and rotor including an inverter for providing power to the electric motor, a controller for controlling the inverter, a low speed control...
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6646409 |
Apparatus for controlling rotation speed of motor
An apparatus for controlling the rotation speed of a motor, which is capable of controlling the rotation speed and the torque of the motor by detecting the input voltage and the input current of...
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6310450 |
Drive system of a brushless motor equipped with hall sensors self-discriminating the actual phasing of the installed sensors
A method is for decoding three logic signals produced by three Hall effect sensors installed in an electronically-switched three-phase brushless motor according to a sequence of six driving phases...
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6150776 |
Variable frequency motor starting system and method
A variable frequency motor starting system has a variable frequency AC power supply for generating an AC power output signal applied to an AC motor. A controller is coupled to the variable...
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6114827 |
Device for controlling a synchronous electric motor with a permanent magnet rotor
A device for controlling a synchronous electric motor with a permanent magnet rotor. The device comprises a stator including a winding disposed around a stack of laminations and with which is...
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6023137 |
Use of traction inverter for supplying power for non-traction applications
A method and apparatus for cranking of an internal combustion engine in an AC electric traction motor propelled vehicle using inverters normally coupled to supply power to each of a plurality of AC...
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5912543 |
Circuit having a digital controller for operation of a synchronous T motor
Electronic circuit having a digital controller operation of a synchronous motor. Precision motors for driving, for example, a video head drum in video recorders are normally designed as externally...
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5852356 |
DC/AC inverter for power supply to an electrical motor for the traction of a vehicle
Disclosed is a dc/ac inverter for the supply of alternating current to the windings of a synchronous electrical motor, especially for the traction of an electrical vehicle. During each half-wave of...
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5757161 |
Apparatus and method for limiting the speed of an electric motor
A motor control apparatus for detecting motor overspeed in an electric car to prevent destruction of the motor and assure the safety of the vehicle. Torque control is applied when the motor speed...
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5734135 |
Procedure for starting an elevator
In a system for starting elevator machinery driven by a synchronous motor, current is fed to the motor by a frequency converter and a traction sheave is connected to the motor to move the elevator...
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5731669 |
Control apparatus for electric vehicle
A control apparatus for an electric vehicle includes a device for detecting a degree of depression of an accelerator pedal in the electric vehicle, and for outputting an accelerator depression...
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5656911 |
Circuit for driving permanent-magnet synchronous motor using proportional controller
A driving device controls a permanent-magnet synchronous motor having a permanent magnet in its rotor using a voltage-type inverter supplying drive power for the synchronous motor, makes the torque...
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5635810 |
Control system for a permanent magnet synchronous motor
A control system for a permanent magnet synchronous motor includes a position estimator means having for cross correlating the back EMF of the unenergized winding with a reference waveform to...
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5583411 |
Synchronous motor control system for electric vehicle
A synchronous motor control system controls a synchronous motor on an electric vehicle for propelling the electric vehicle in a propulsive mode or regenerating electric energy in a regenerative...
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5504404 |
Method and apparatus for controlling motor
In a method and an apparatus for controlling a motor, one type or a plurality of types of weakening current are previously set, a first torque command current determined from a speed deviation...
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5436544 |
Method of phase advancing compensation control for an AC synchronous motor
An AC synchronous motor control method in which the optimum phase advancing control is executed not only in acceleration but also in deceleration of a motor. When a value P, which is obtained by...
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5387854 |
Method of torque notch minimization for quasi square wave back EMF permanent magnet synchronous machines with voltage source drive
A method for smoothing the torque characteristics of a multi-phase PM synchronous machine by controlled driving with a conventional voltage source inverter operated in accordance with a...
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5262709 |
Pulse motor control circuit
A pulse motor control circuit for starting up and synchronizing a sync pulse motor (for use typically in factory automation or precise machining) with an external sync signal. The control circuit...
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4939441 |
Excitation system for a brushless generator having separate AC and DC exciter field windings
An excitation system for a brushless generator includes an exciter portion having a set of polyphase exciter field windings and an additional exciter field winding disposed in a stator of the...
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4804900 |
Control apparatus for synchronous motors
A synchronous motor control apparatus includes a polyphase synchronous motor, a frequency adjusting circuit responsive to the closing of a power supply switch to generate a frequency control signal...
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4616166 |
Electric power system for starting a large rotatable synchronous machine
For starting a rotatable 3-phase a-c electrical machine of the synchronous type, the stator windings of the machine are connected to an electric storage battery via a controllable electric power...
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4527109 |
Control apparatus for thyristor motor
A control apparatus for thyristor motor comprises a voltage detector (27), a speed detecting circuit (600) and a correction circuit (800). The voltage detector (27) detects DC voltage (E d )...
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4295084 |
Control apparatus of synchronous motor having thyristor converter
A control apparatus of a synchronous motor having armature windings and perpendicular field windings comprises a frequency converter of a cycloconverter which converts the frequency of an...
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4085355 |
Variable-speed regenerative brushless electric motor and controller system
A synchronous polyphase motor is driven and regeneratively braked by relatively high-frequency power switching circuits that cause stator currents to vary sinusoidally with rotor position so the...
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3823357 |
STARTING DEVICE FOR A SYNCHRONOUS MACHINE
A starting arrangement for a polyphase synchronous machine includes a polyphase induction machine having a wound rotor which is coupled to the rotor of the synchronous machine for rotation...
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3789282 |
ARRANGEMENT FOR PREVENTING CHATTERING AND SCORING OF DIRECT-CURRENT SLIP-RING BRUSHES
An arrangement is disclosed for preventing chattering and scoring of the slip-ring brushes of a synchronous machine during periods of time when the machine operates without load by supplying a...
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3573578 |
ELECTRIC MACHINE ARRANGEMENTS INCLUDING ELECTRIC ROTATING MACHINES
When terminals in each phase of primary and secondary winding of a transformer are respectively electrically connected with a middle point and both terminals in each phase of armature stator...
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3548965 |
VEHICLE WHEEL DRIVE WITH OUTSIDE CLAW TOOTH ROTOR SYNCHRONOUS ROTOR
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3541410 |
EXCITATION APPARATUS FOR SYNCHRONOUS ROTATING MACHINERY
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3424961 |
LOAD RESPONSIVE,STEPPING MOTOR SPEED CONTROL CIRCUIT
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3406323 |
Synchronous machine with single rotor
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3355646 |
Optimum driving method for step motors
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3187092 |
Speed control system using parallel control loops
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3152542 |
Devices for automatically preadjusting the different elements of a printing machine
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2958812 |
Angular movement transmitting device
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2891207 |
Synchronous electric motors
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2861236 |
Polyphase slave motor
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2836778 |
Apparatus for converting electrical energy into mechanical energy
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2800619 |
Electric motors
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0990647 |
Title is not available
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