期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 29, 期 8, 页码 4438-4449出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2014.2300938
关键词
Contactless power transmission (CPT); phase detection contactless current transformer (PDCCT); self-oscillating; series-series (SS) type contactless resonant converter (CRC)
资金
- National Natural Science Foundation of China [51077069]
- Natural Science Foundation of Jiangsu Province [BK2009372]
- Research Fund for the Doctoral Program of Higher Education of China [20103218110013]
In this paper, a self-oscillating control strategy is proposed for a series-series type contactless resonant converter (CRC). By detecting the secondary current phase of a CRC to control the inverter, better output controllability, dynamic response, and self-adaptability can be achieved. While the realization of self-oscillating control strategy depends on phase detection of secondary current. To provide a passive solution, a current transformer with shorted secondary, called phase detection contactless current transformer (PDCCT) is proposed. The proposed PDCCT can detect the current phase from the secondary side of a CRC and feedback to the primary side rapidly and accurately despite the changes in air gap. To guarantee the accuracy of self-oscillating control strategy, the time delay in control circuitry is studied and compensated. A 60-W self-oscillating CRC with PDCCT is then fabricated to demonstrate the validity of both PDCCT and self-oscillating control strategy. Besides, a testing circuit is designed to emulate the changes in converter parameters, and the dynamic performance shows that self-oscillating control strategy can respond to parameter changes in a switching period.
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