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首页> 外文期刊>Journal of power electronics >A Wide Voltage-Gain Range Asymmetric H-Bridge Bidirectional DC-DC Converter with a Common Ground for Energy Storage Systems
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A Wide Voltage-Gain Range Asymmetric H-Bridge Bidirectional DC-DC Converter with a Common Ground for Energy Storage Systems

机译：具有储能系统公共接地的宽电压增益范围非对称H桥双向DC-DC转换器

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摘要

A wide-voltage-conversion range bidirectional DC-DC converter is proposed in this paper. The topology is comprised of one typical LC energy storage component and a special common grounded asymmetric H-bridge with four active power switches/anti-parallel diodes. The narrow output PWM voltage is generated from the voltage difference between two normal (wider) output PWM voltages from the asymmetric H-bridge with duty cycles close to 0.5. The equivalent switching frequency of the output PWM voltage is double the actual switching frequency, and a wide step-down/step-up ratio range is achieved. A 300W prototype has been constructed to validate the feasibility and effectiveness of the proposed bidirectional converter between the variable low voltage side (24V similar to 48V) and the constant high voltage side (200V). The slave active power switches allow ZVS turn-on and turn-off without requiring any extra hardware. The maximum conversion efficiency is 94.7% in the step-down mode and 93.5% in the step-up mode. Therefore, the proposed bidirectional topology with a common ground is suitable for energy storage systems such as renewable power generation systems and electric vehicles with a hybrid energy source.
机译：本文提出了一种宽电压转换范围的双向DC-DC转换器。该拓扑由一个典型的LC能量存储组件和一个特殊的公共接地非对称H桥组成，该桥具有四个有源功率开关/反并联二极管。窄输出PWM电压由来自非对称H桥的两个正常（较宽）输出PWM电压之间的电压差产生，占空比接近0.5。输出PWM电压的等效开关频率是实际开关频率的两倍，并且实现了宽的降压/升压比范围。已经构建了一个300W的原型，以验证所建议的双向转换器在可变低压侧（类似于48V的24V）和恒定高压侧（200V）之间的可行性和有效性。从动有功功率开关允许ZVS开启和关闭，而无需任何额外的硬件。在降压模式下，最大转换效率为94.7％，在升压模式下为93.5％。因此，提出的具有公共接地的双向拓扑适合于能量存储系统，例如可再生能源发电系统和具有混合能源的电动汽车。

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