Method and apparatus for providing pulse width modulation
US6867645B1 · kind B1 · utility
7Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pulse width modulation scheme allows the creation of a unipolar pulse width modulated output signal. Two switching circuits (104, 204), preferably different legs of an inverter circuit, can operate to not only modulate an input voltage but also to reverse the polarity of the PWM output signal. Both switching circuits can be configured to accomplish both features, thus the switching load is spread out across all four switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.