Forced commutation chopper having current limit
US3993942A · kind A · utility
5Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Sep 11, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/92
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A forced commutation chopper control for regulating speed of a DC series tractive motor limits peak motor current by sensing the voltage across the commutation capacitor during the on-time of the current pulses and gating the commutation SCR on in response to a predetermined magnitude of sensed voltage to thereby terminate current pulses to the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.