Bi-directional Dual Active Bridge Converter applying variable switching frequency for low battery charger 스위칭 주파수 가변 방식을 적용한 저전압 배터리 충전용 Dual Active Bridge 컨버터원문보기
Jeong, Dong-Keun
(Dept. of Electrical Engineering Pusan National University)
,
Kim, Ho-Sung
(Power Conversion and Control Research Center, HVDC Research Division, KERI)
,
Ryu, Myung-Hyo
(Power Conversion and Control Research Center, HVDC Research Division, KERI)
,
Baek, Ju-Won
(Power Conversion and Control Research Center, HVDC Research Division, KERI)
,
Kim, Hee-Je
(Dept. of Electrical Engineering Pusan National University)
This paper proposed an optimized design of a dual active bridge converter for a low-voltage charger. The dual active bridge converter among various bi-directional DC/DC converters is a high-efficiency isolated bi-directional converter. In the general design, when the battery voltage is high, the ZVS...
This paper proposed an optimized design of a dual active bridge converter for a low-voltage charger. The dual active bridge converter among various bi-directional DC/DC converters is a high-efficiency isolated bi-directional converter. In the general design, when the battery voltage is high, the ZVS region is reduced. In contrast, when the battery voltage is low, the efficiency is low due to high conduction loss. In order to increase the ZVS region and the power conversion efficiency, depending on the battery voltage, variable switching frequency method is applied. At the same duty, the same power is obtained regardless of the battery voltage using the variable switching frequency method. The proposed method was applied to a 5kW prototype converter, and the experimental results were analyzed and verified.
This paper proposed an optimized design of a dual active bridge converter for a low-voltage charger. The dual active bridge converter among various bi-directional DC/DC converters is a high-efficiency isolated bi-directional converter. In the general design, when the battery voltage is high, the ZVS region is reduced. In contrast, when the battery voltage is low, the efficiency is low due to high conduction loss. In order to increase the ZVS region and the power conversion efficiency, depending on the battery voltage, variable switching frequency method is applied. At the same duty, the same power is obtained regardless of the battery voltage using the variable switching frequency method. The proposed method was applied to a 5kW prototype converter, and the experimental results were analyzed and verified.
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문제 정의
This paper proposed the design and control method of the DAB converter for low voltage charger in a UPS system. The proposed method is that the leakage inductance is designed at 0.
대상 데이터
In addition, the switching frequency is variable depending on the battery voltage. The proposed method was applied to a 5kW prototype dual active bridge converter, and was verified through the experiments. Through the proposed method, the performance has been improved and the ZVS region has been expanded 9.
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