Digital pulse width modulation motor control system
US4620143A · kind A · utility
6Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1984 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Nov 9, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53873
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An adjustable frequency AC motor drive control system includes pulse width modulation control of an inverter coupled with the motor and a programmed microprocessor which generates a cosine wave in cooperation with a sine wave and a carrier wave to provide a synthesized sine wave voltage to the motor by controlling the conduction of power switches at a rate higher than the fundamental frequency of the sine wave voltage output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.