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This paper proposes a novel integrated power system for electric vehicles (EVs) to improve the power density and efficiency at a less cost. It integrates the on-board charger (OBC) and the low-voltage DC/DC converter (LDC) by common use of semiconductor devices, capacitors and magnetic components. Therefore, the volume and cost of the integrated system is reduced compared with the conventional two...
Inductive coupled power transfer (ICPT) is an emerging technology that may create new applications for wireless power charging. However, low efficiency is one of the main obstructing factors for promoting this technology. In this paper, a method of resonant frequency optimization based on resonant current calculation at the secondary side of the system is proposed to achieve higher efficiency. In...
In this paper, a new zero voltage current switching (ZVCS) resonant voltage-fed push-pull converter for vehicle inverter application is proposed. It achieves ZCS off of the secondary diodes with using secondary leakage inductance as resonant element. By selecting appropriate dead time, the proposed circuit can also feature ZVS on of MOSFETs. The proposed topology can achieve satisfying performance...
To decrease the number of clamping diodes and flying capacitors in multilevel inverters, a novel multilevel inverter topology with no clamping diodes and flying capacitors is proposed in the paper. The topology structure, operating principle, balance of the DC link capacitor voltages, and comparisons with the conventional multilevel topologies will be discussed. The number of power switching devices...
Due to the switching operation, the pulse-width modulation (PWM) converters are inherent time-variant systems with comprehensive dynamics. The generalized state-space averaging (GSSA) method is an approach to model them as time-invariant systems, defined by a set of differential equations and capable of representing circuit waveforms. This paper proposes a new generalized state-space averaging model...
Topology selection involved in the design of the inductively coupled power transfer (ICPT) system is presented in this paper. Different compensation topologies of ICPT system are discussed, including single-resonant compensation and multi-resonant compensation topologies. Voltage and current gain are obtained in each case. The concept of power factor in resonant converter is introduced to minimize...
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