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Recently, electric vehicle (EV) chargers with their batteries have been developed for vehicle-to-home (V2H) applications, acting as a backup generation to supply emergency power directly to a home. Traditional EV charger in V2H applications mainly consists of DC/DC and DC/AC stages, which complicate the control algorithm and result in low conversion efficiency. In order to solve the problem, a novel...
In electric vehicle (EV) systems, bi-directional DC/DC converters are applied to interface the battery bank with the high voltage DC-link of the inverter. The control of the DC-link voltage is important for the high performance of the system. A DC-link voltage control strategy for the bidirectional DC/DC converter is proposed, which eliminates the need for detecting the operating mode and do not need...
In electric vehicle systems, bi-directional DC/DC converters are used to interface the battery bank with the high voltage DC bus of the inverter. The high power density and high efficiency are required for bidirectional DC/DC converters. This paper discusses the relationship between switching frequency, inductor value and passive components volume. First, the topologies of the system and the converter...
Multilevel inverter is an attractive solution for the high power transformerless PV system. In contrast to the neutral-point clamped (NPC) or flying capacitor (FC) multilevel inverter, the dc-link voltage rating is much lower for the cascade H-bridge multilevel inverter. Therefore, the voltage stresses of the semiconductor switches are reduced. However, more than one PV array is needed for providing...
A two-stage bi-directional resonant DC/DC converter with frequency tracking control is analyzed. The first stage is Buck/Boost converter which is used to regulate the voltage gain. The second stage is series resonant converter (SRC) that acts as a solid state transformer (SST) to achieve isolation with high efficiency and high power density. To realize accurate and fast frequency tracking for series...
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