Microprocessor based motor control
USRE33379E · kind E · reissue
41Cited by
7References
47Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1988 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Dec 9, 2008 |
Classification
- Technology area (CPC —)General
Abstract
A microprocessor based motor controller which provides open loop speed control at low conduction angles, closed loop speed control at high conduction angles, and a smooth transition between open loop and closed loop zones. In open loop, the motor speed is selected and is permitted to vary with applied load. In closed loop, the motor speed is held constant, substantially irrespective of load. In the transition zone, the motor is operated in a hybrid open loop, closed loop fashion. Anti-kickback protection is also provided based on a percentage change in the motor's rotational period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.