Pulse width modulated control system
US3989992A · kind A · utility
19Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1975 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Mar 10, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
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 average energy of unbalanced pulse periods is the same, but the potential level differs by a substantial amount. Energy storage may be provided for in conjunction with the lesser of the two power supplies to assist in a rapid reversal, stop or shaft positioning of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.