Multiple chopper speed control system for compound motor
US4751439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1983 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | May 16, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/92
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compound-motor speed control system for a battery-powered vehicle (86) wherein the series winding (14) and the shunt winding (16) of the motor (12) are magnetically linked in energy transfer relation. A first current switch (18) is connected in series with the series winding (14) and the armature (15) and a second current switch (20) is connected in series with the shunt winding (16). A digitally-implemented speed control system (24) responds to the speed selection settings of an analog device (64) to operate the first switch intermittently while holding the second switch closed over a lower speed range, and to operate the second switch intermittently while holding the first switch closed over a higher speed range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.