DC-side leakage current reduction for single phase full-bridge power converter/inverter
US9048756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2012 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Mar 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49117
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Leakage current through stray or parasitic capacitance (which is particularly large in devices such as photovoltaic cell arrays and which are damaged by such leakage currents) due to common mode switching noise in a full bridge single phase power converter is reduced at high frequencies by magnetically coupling the two phase legs on the AC side of the power converter and connecting mid points of the AC and DC sides of the power converter and is reduced at low frequencies by use of a feedback arrangement that modifies sinusoidal modulation of the switches of the full bridge converter to function as an active filter. The magnetic coupling for the two phase legs is designed in a simple manner to avoid saturation based on volt-second considerations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.