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| Number | Title | Issue Date |
| 7400103 | Controller for a multi-phase brushless DC motor Control of rotational speed of a direct current multi-phase brushless motor is provided using an apparatus and method that works at low speed but does not depend upon Hall effect sensors. An apparatus for accelerating rotation of the motor shaft has a power stage ci... | 07/15/2008 |
| 6781342 | System and method for soft starting a three phase motor A three phase motor starting system is provided to reduce the in-rush current to the motor in order to obtain a soft start of the motor. The soft start of the motor equates to reduced impact forces on motor parts and device components connected to the motor during s... | 08/24/2004 |
| 5521472 | Multiphase DC motor and starting method thereof A starting method for starting a multiphase DC motor having a stator provided with stator coils, a rotor provided with a rotor magnet and detector for detecting revolutions of the rotor, has stepping process and acceleration process. In the stepping proce... | 05/28/1996 |
| 4908554 | Moisture sensing apparatus and interior protection system There is provided a moisture-responsive system for protecting the interior of an enclosure such as a motor vehicle which includes an opening; a closure for the opening; a moisture sensor for providing a moisture signal in response to sensing of moisture i... | 03/13/1990 |
| 4626750 | Solid state d.c. motor control The system includes a plurality of parallel-connected power field effect transistors arranged for connection in series with the traction motor with a common control circuit connected to the gate electrodes of the field effect transistors to control the on... | 12/02/1986 |
| 3989992 | Pulse width modulated control system A pulse width modulated motor control system in which the power supplies for forward and reverse operation for the motor are provided to supply electric energy at different levels. The control signals for the motor are provided in such a manner that the a... | 11/02/1976 |
