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| Number | Title | Issue Date |
| 7193377 | System and method for controlling motor speed using a biased pulse width modulated drive signal A motor drive circuit includes a switching circuit having an input node that receives a drive signal and a control node that receives a control signal. The switching circuit couples the input node to an output node responsive to the control signal. A bias element re... | 03/20/2007 |
| 6407521 | Adaptive demagnetization compensation for a motor in an electric or partially electric motor vehicle In an electric or hybrid electric vehicle, a voltage monitor (102) is directly coupled to a traction motor (38) and/or generator motor (30) to detect a permanent magnet induced voltage within the motor at a predetermined speed and no load condition (300).... | 06/18/2002 |
| 6324339 | Battery pack including input and output waveform modification capability A battery pack includes a plurality of electrochemical cells and a control circuit. The battery pack provides power to a tool in the form of a pulse width modulated waveform. The plurality of electrochemical cells provide a total output voltage. The contr... | 11/27/2001 |
| 5717316 | Motive power generating apparatus utilizing energy of permanent magnet A motive power generating apparatus using magnetic flux from permanent magnets providing higher efficiency and torque is disclosed. An apparatus of one embodiment according to the present invention comprises a ring-shaped stator (10) formed of magnetic ma... | 02/10/1998 |
| 5619112 | Bi-directional electric torque motor and driver A limited angle torque motor and control circuit are adapted to convert an electrical demand signal of varying magnitude into a motor shaft position relating to the magnitude of the demand signal. More particularly, a bidirectional motor is provided havin... | 04/08/1997 |
