Gated asynchronous carrier modulation
US4409535A · kind A · utility
17Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1982 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | Mar 18, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/529
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor pulse width modulation control technique employing gated asynchronous carrier modulation including establishing a repetitive modulation signal along with the generation of a carrier frequency signal at a frequency greater than the frequency of the modulation signal. The carrier frequency signal is gated at a gating rate less than the frequency of the carrier frequency signal so as to provide the gated carrier frequency signal. Means are provided for modulating the gated carrier frequency signal by the aforementioned repetitive modulation signal so as to provide cyclic pulse width modulation drive signal for motor control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.