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| Number | Title | Issue Date |
| 7132808 | Solid state series motor control A solid state series motor control includes first and second FORWARD DRIVE elements, first and second REVERSE DRIVE elements, first and second diodes, a current sensor, and a capacitance. The series motor control is conf... | 11/07/2006 |
| 7126307 | Interface circuit for actuating an electrical device and circuit arrangement for actuating an electric motor therewith An interface circuit for actuating an electrical consumer, especially a pole-changing rotary-current induction motor, with a first contact element assigned to a signal line carrying an alternating voltage signal to generate at least two different control signals. A ... | 10/24/2006 |
| 7124691 | Method for monitoring and controlling locomotives The present invention is directed to a locomotive comprising energy storage units, such as batteries, a prime energy source, such as a diesel engine, and an energy conversion device, such as a generator. The locomotive comprises one or more of the following features... | 10/24/2006 |
| 6812661 | Multiphase motor having winding connections specific to respective operating speed ranges A permanent magnet motor includes salient pole stator cores. The poles and/or linking portions therebetween are wound with a plurality of winding coil sets. Mutually exclusive speed ranges are established between startup and a maximum speed at which the motor can be... | 11/02/2004 |
| 6456784 | Circuit arrangement for starting a DC motor In a circuit arrangement for starting a DC motor comprising at least one field winding, particularly for switching on a DC motor for driving a hydraulic fluid pump for operating hydraulic actuators of a vehicle loading platform system, means are provided ... | 09/24/2002 |
| 6127791 | Electric drive system and method An integrated transmission is effectively achieved within a series-excited motor by varying the number of winding turns in the field coil in relation to the speed-torque demand on the motor. At low motor speed, all of the field winding is engaged to produ... | 10/03/2000 |
| 6093987 | Appliance having an a.c. series motor and having switching means for switching this motor to different speeds In an appliance having an a.c. series motor, which comprises a rotor coil configuration and two stator coils, switching means are provided for switching the a.c. series motor to different speeds or speed characteristics. Both coil ends of each of the two ... | 07/25/2000 |
| 5703448 | Shunt-type speed control circuit having transient storage effect for a series or compound motor The series field winding of a compound or series motor includes a plurality of taps and, connected in parallel therewith, a transient storage element such as a capacitor, and a flywheel diode. The taps are controlled by switches in the form of transistors... | 12/30/1997 |
| 5569992 | DC shunt (or compound) motor and its related circuit with controllable dynamic characteristics A DC shunt or compound motor, in which an armature current detection device, provided to increase the current in the shunt field winding following an increase in armature load current, causes the motor to have characteristics similar to a series motor unt... | 10/29/1996 |
| 5412298 | Motor control circuit having series or compound excitation during starting and shunt excitation during normal running A motor control circuit provides series or compound excitation during starting and shunt excitation during normal running. A switch responsive to the motor speed, the armature current, the armature EMF, or the like, includes terminals connected to the ser... | 05/02/1995 |
| 5399948 | Governor circuit for universal series (or compound) motor A governor circuit for limiting the top speed of a universal series or compound motor. The governor circuit includes a voltage detector for detecting a selectable threshold voltage across the armature of the motor, and a current shunting circuit which is ... | 03/21/1995 |
| 4935678 | Universal motor speed control circuit for hand mixer A speed control circuit in combination with an electrical motor for use in a hand-held food mixer operated on AC household electrical current. The motor is a universal type having a series connected armature winding and field winding wherein the field win... | 06/19/1990 |
| 4639647 | Four quadrant control of series motors A method of controlling and a controller for controlling at least one series motor is provided. Rectifier means is connected in series with the motor so that current through a field winding of the motor is always in the same direction irrespective of the ... | 01/27/1987 |
| 4385266 | Field weakening system for pulse-controlled three-terminal d.c. motor A pulse control circuit for a d.c. series motor having an armature and two oppositely-wound field windings, comprises two semiconductor static switching devices, such as thyristors, each connected in series with the armature and a respective one of the fi... | 05/24/1983 |
| 4380724 | Shunt field control apparatus and method A motor control is provided for a DC series motor operative with a chopper apparatus and including a thyristor switch to determine the field shunt operation of the motor. A voltage reversal that occurs across the field windings when the chopper is OFF and... | 04/19/1983 |
| 4370603 | Shunt field control apparatus and method A field shunt operation for a chopper controlled series DC propulsion motor in the power mode is provided in response to a desired torque request, when a predicted value of the resulting shunt field motor current is determined to be no greater than the kn... | 01/25/1983 |
| 4181875 | Drive circuit for a DC motor A drive circuit for a DC motor provided with an armature having an armature winding and a plurality of field poles. The field poles are each composed of a main pole excited by a field winding and an auxiliary pole formed with a permanent magnet of the sam... | 01/01/1980 |
| 4019106 | Motor speed control A switch for speed control of an electric motor driven vehicle employs a combination of resistance switching, field weakening and voltage switching. A mechanical switch assembly has a speed switch and a voltage switch that are interconnected so that the v... | 04/19/1977 |
