Pulse width modulation pulse generator
US4628475A · kind A · utility
25Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1984 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Feb 3, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A modulating wave signal whose phase abruptly changes is compared with a carrier signal to generate a pulse width modulation pulse. The carrier signal is a sine wave signal having a frequency n times as high as that of the modulating signal and synchronized with the modulating signal. A phase of the carrier abruptly changes by a factor of n as the phase of the modulating signal abruptly changes. Thus, a pulse with modulation pulse which causes an output voltage of a pulse with modulation inverter to be sinusoidal is generated even if the phase of the modulating wave signal abruptly changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.