Phase shifting and PWM driving circuits and methods
US7151394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2005 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Jun 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33573
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides an inverter controller comprising a drive circuit that generates a plurality of switch drive signals for inverter applications. In some exemplary embodiments, the drive circuit operates by reversing the command level of an error signal. In other embodiments, the drive circuit operates by using a half period of a sawtooth signal. In still other embodiments, the drive circuit operates by using a double period opposite shifting pulses method. The present invention also provides a PWM signal generator circuit that generates periodic PWM switch drive signals symmetrical to the minimum or maximum of a sawtooth waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.