Modified high-efficiency phase shift modulation method
US7173467B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2005 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Sep 6, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a high-efficiency phase shift modulation method suitable for use in a traditional DC/AC single-phase full-bridge inverter. In this method, phase-shifted signal timing is used to modulate a duty cycle so that a power transistor is operated in a zero voltage switching state. As such, noises and switching loss of a switching device when turned on or off, may be reduced and thus efficiency of the inverter may be promoted. With this high-efficiency phase shift modulation method, at least the following advantages may be achieved: lower switching stresses, lower switching losses and thus increased conversion efficiency, lower electromagnetic interferences (EMIs) and no additional circuit required and thus easier realization of a controller for the inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.