H-bridge micro inverter grid-connected device

US9190920B2 · kind B2 · utility

Assignees

• Northwestern University · US
• Huaguang Zhang · CN
• Dongsheng Yang · CN
• Guangru Zhang · CN
• Gang Wang · CN
• Le Li · CN
• Xinrui Liu · CN
• Yingchun Wang · CN
• Rijiang Wang · CN
• Yang Jiao · CN

Inventors

• Huaguang Zhang · Shenyang, CN
• Dongsheng Yang · Beijing, CN
• Guangru Zhang · Shenyang, CN
• Gang Wang · Shenyang, CN
• Le Li · Hangzhou City, CN
• Xinrui Liu · Shenyang, CN
• Yingchun (David) Wang · Shenyang, CN
• Rijiang Wang · Shenyang, CN
• Yang Jiao · San Jose, US

Key dates

• Filing date: Aug 10, 2012
• Grant date: Nov 17, 2015
• Expiry date: Jan 29, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/56
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An H-bridge micro inverter grid-connected device is invented to solve the problem that failure of any photovoltaic panel on the existing solar photovoltaic system cascade can cause efficiency reduction of the whole photovoltaic panel module. The H-bridge micro inverter grid-connected device comprises a single-chip microcomputer controller, a CPLD controller, a MOSFET full-bridge circuit, a high-frequency transformer, a half-bridge rectifying circuit, an SCR full-bridge circuit and a filter circuit, wherein the MOSFET full-bridge circuit is in the full-bridge type, the high-frequency transformer is a single-phase transformer with a central tap, and the SCR full-bridge circuit is applied. The integral structure above is characterized by the decreasing number of components, the reduction of power switches, and the simplification of the control circuits and driving circuits, so as to decrease the number of full-control switch components, improve the system reliability and reduce the system costs.