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7545070 |
Commutator motor having a number of field winding groups
A commutator motor, which has a series excitation or shunt excitation and which, in particular, is suited for use as a drive motor for a washing drum of a laundry treatment device. The stator of a...
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7272302 |
PSC motor system for use in HVAC applications with field adjustment and fail-safe capabilities
A field-adjustable motor control system includes a motor, an inverter coupled to provide energization to the motor, a controller coupled to the inverter, and a field adjustment circuit that...
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6895176 |
Method and apparatus for controlling electronically commutated motor operating characteristics
A permanent magnet DC brushless motor control assembly permits a user to select the permanent magnet DC brushless motor operating characteristics by selecting appropriate control circuits to...
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6803735 |
Speed-based open-loop start-up method for brushless DC motor
A method of starting a brushless DC motor 12 at any initial speed (A) establishes a initial stator-field speed and setting a counter of synchronization, (B) measures a speed of a rotor of the...
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6351053 |
Reluctance motors
A reluctance motor is described in which stator coils are driven with sinusoidal, or substantially sinusoidal, waveforms. Preferably, the spread angle of the stator poles is less that the spread...
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6349796 |
Starting drive control for elevator
A drive machine for elevators includes a rotatable drive sheave over which a main cable for hanging an elevator cage is wound, a stationary shaft for supporting rotation of the drive sheave and...
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6342772 |
Drive circuit and method for driving a switched reluctance machine
Drive circuit and method for driving a switched reluctance machine having at least two winding per pole are provided. The circuit includes first and second direct current links. The circuit further...
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5814958 |
Method and apparatus for the electronic control of electric motor driven golf car
A system is provided for controlling a DC motor which is constructed to propel a golf car. The motor is a shunt wound motor having independently excited armature and field windings. The basic input...
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5793175 |
Performance event sensing for control of electric motor driven golf car
A system is provided for controlling a D-C motor which is constructed to propel a golf car. The motor is controlled to provide performance according to a predetermined field current map which calls...
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5764009 |
Motor control device in electric motor-operated vehicle
An electric motor control for a series-wound DC motor for providing speed control and also for controlling regenerative braking. The regenerative braking is energized either when the accelerator...
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4399393 |
Accelerator control for electric vehicles
An accelerator control for field-controlled DC motors, or other applications requiring non-linear response to linear control input. The control uses a photodetector detecting light reflecting from...
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4309644 |
Electric vehicle controller adapted for charge station connection
An on-board quick charge circuit for an electric vehicle battery is incorporated in an electric vehicle having a solid state dc chopper motor speed controller which may be connected in either a...
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4250437 |
Field weakening circuits for electric motors
A field weakening circuit for an electric motor comprises a switching circuit the impedance of which is variable connected in parallel with a field winding of the motor. The switching circuit...
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3924169 |
Mixer with speed control
A food mixer having speed control means including a first switch having a series of speed positions and a switch lever movable in the mixer handle forwardly and rearwardly thereof and a second...
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3889168 |
On-off control circuit
An ON-OFF control circuit for a load requiring large electric power having first and second transistors, and first and second resistors. The first transistor and first resistor form a first current...
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3675105 |
CURRENT SENSING APPARATUS
A current transformer having a pair of primary windings is connected between a single phase thyristor-diode full-wave bridge network and a shunt field winding of a D.C. motor to linearly sense the...
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3560816 |
DRIVING SYSTEM FOR TRACTION PURPOSES
An electrical traction system with parallel-connected groups of series motors is provided with means for switching over to a condition with a constant number of field ampere turns when maximal...
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3497788 |
VARIABLE SPEED D.C. MOTOR WITH THIRD BRUSH
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3486102 |
MULTIPLE PULSE,EXTENDED RANGE CONTROLLED RECTIFIER FIRING CIRCUIT
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3366864 |
Auxiliary commutating field for direct current motors
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3365641 |
Electric motor speed control device
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3311802 |
Ward-leonard plural motor electrical drive means
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3193698 |
Transistor controlled speed shunt
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3183427 |
Field regulator for dynamoelectric machine
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3096470 |
Speed and load control for electric motors
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3090068 |
Windshield wiper
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3081427 |
Control circuit
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3054937 |
Dual range motor speed control system
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3047729 |
Voltage control system
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2923873 |
Multi-speed salient pole universal motor with split-wound field
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2922943 |
Electrical machine
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2785366 |
Constant speed, direct current motor and control
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2023243 |
Control system
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