Speed control arrangements for electric motors
US5387856A · kind A · utility
1Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1993 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Oct 20, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/912
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a speed control arrangement for an induction motor or an a.c. permanent magnet motor in which any one of a number of power frequencies may be selected for application to the motor, there is provided circuitry to control the rate of change of frequency from one selected power frequency to another to control the acceleration or deceleration of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.