Phase shifting and PWM driving circuits and methods
US6897698B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | May 30, 2023 |
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.