Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1997.11a
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- Pages.456-458
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- 1997
A Design of Battery Charger using Phase-Lock technique
Phase-Lock 기법을 이용한 Battery 충전기 설계
Abstract
The phase-lock technique is applied to a three-phase semi-bridge type battery charger system. Using an inner fast dynamic loop, the phase-locked voltage control (PLVC) technique of three-phase semi-bridge converter is proposed to give a frequency synchronism and to reduce the subharmonics due to the unbalance of transformer or power line. To protect the power devices, the two stage soft-start, function with softly locking the phase and softly increasing the current is presented. As limiting the reference voltage of the inner voltage control loop, muti-lock phenomena are removed on the PLVC loop. A current limit function is also proposed to limit the current of battery and converter. The proposed controller is confirmed through experiment results.
Keywords