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This paper investigates current ripple reduction in single-input multiple-output converters based on input current phase-shift and output inductor coupling. Current ripple causes losses and increased EMI in converters. To decrease current ripple, usually bulky electrolytic capacitors and inductors must be used. Besides being bulky and rather expensive, electrolytic capacitors usually have high failure...
This work presents detailed analysis for a phase-shift soft switching inverter. The optimum soft switching operation algorithm is proposed based on the maximum soft switching operation range and also the smallest device current stress. Meanwhile, the soft switching control algorithm is proposed to guarantee the zero-voltage-switching (ZVS) within each switching period. A compact coupled circulating...
As a core link of battery energy storage system (BESS) for grid-connection, the dual-active-bridge (DAB) converter has significant effects on the performance of the whole system. In order to address the mismatch voltage issue of DAB in BESS, an optimal control strategy is proposed. The paper discusses the operation principle of the circulating power, and analyzes the voltage, transmission power and...
A 60kV/6kW high voltage power supply for electronic beam welder (EBW) based on phase-shift control is designed. The power is composed of DSP, CPLD, IPM etc. It has realized the automatic adjustment of high voltage, over-voltage and over-current protection. The test proves that high voltage power supply has reached design goal and satisfied the actual requirements of welding technology.
In the most power electronics converters, the overall volume is mainly determined by the number of parts and the size of passive components. Integrated magnetics and planar magnetics techniques therefore have been an excellent option in order to reduce the count and the size of magnetic components, hereby increasing the power density of converters. A new planar integrated magnetics (PIM) technique...
This paper presents a current-doubler rectifier with low output current ripple and high step-down voltage ratio. In the proposed rectifier, two extra inductors are introduced to extend the duty ratio of switches which in turn can reduce the peak current through the isolation transformer and lower output current ripple, and two extra diodes are used to provide discharge paths for the two extra inductors...
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