1. DC/DC Converter for Bipolar LVdc System With Integrated Voltage Balance Capability
- Author
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Fu Qintian, Dianguo Xu, Xiaomin Gong, Qian Wang, Mao Shukai, Binbin Li, and Xiaodong Zhao
- Subjects
Power loss ,business.industry ,Computer science ,020208 electrical & electronic engineering ,Electrical engineering ,Topology (electrical circuits) ,Hardware_PERFORMANCEANDRELIABILITY ,02 engineering and technology ,Dead time ,Inductor ,Dc converter ,Reliability (semiconductor) ,Hardware_INTEGRATEDCIRCUITS ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,business ,Dc dc converter ,Voltage - Abstract
Bipolar LVdc distribution is a promising solution for better integration of renewables and enhancement of system efficiency and reliability, but it also faces the challenge of pole voltage imbalance. By simple modifications of the bidirectional CLLC dc/dc converter, this article presents a dc/dc converter with integrated pole voltage balance capability. The converter presents less number of semiconductors, smaller overall footprint, and lower power loss compared to the employment of additional pole voltage balancers. Operating principle of this dc/dc converter and its inherent pole voltage balancing capability are explained, while further control scheme is also developed to compensate the small pole voltage difference caused by the dead time effect. Simulation results with 150 kW/±375 V bipolar output demonstrate the effectiveness of the converter, and the experimental results from a 500 W/±50 V downscaled prototype further prove the proposed concept.
- Published
- 2021