This paper describes an on-board battery charger for Plug-in Hybrid Electric Vehicle. For this research, the PFC (Power Factor Correction) boost converter of continuous current mode control method and zero voltage switching PSFBC (Phase Shift Full-bridge Converter) are used.
Most of automobile manufacturers continue to invest for the development of the hybrid electric vehicle driven by using the battery and electric motor.
The PHEV (Plug-in Hybrid Electric Vehicle) is a eco-friendly car. It has the conventional hybrid car structure but reducing the weight of the engine used. It''s propulsion is increased by the battery and electric motor and the battery can be charged from the commercial power.
The core technologies of PHEV are battery, battery charger and driving motor. The battery and battery charger are compared with the engine and engine lubrication of conventional car, so the specific gravity of the battery and battery charger are very high.
The OBC (On-board Battery Charger) using commercial power must have a power factor correction circuit to meet the harmonic current regulation of IEC 61000 and IEEE Std. 519.
In this battery charger the PFC boost converter, can be implemented with the minimum number of components is used for the improvement of power factor. By a using PFC boost converter, the input voltage and input current become same phase so we can improve the power factor for the whole system.
EV (Electric Vehicle) or PHEV battery charger is required the high switching frequency to reduce the size of components. For this reason, mainly the zero voltage switching converter is considered for low switching loss. In this paper the zero voltage switching PSFBC (Phase Shift Full-Bridge Converter) is used for high efficiency, electrical insulation and low switching stress. The PSFBC has been widely used in medium to high power DC-DC conversions. Compared with the resonant converter, it can achieve soft switching without adding any auxiliary resonant devices. This topology permits all switching devices to operate under zero voltage switching by using circuit parasitic such as leakage inductance and power MOSFET junction capacitance. Therefore, this converter is able to be operated in high frequency with the improvement of efficiency for the whole system.
In order to confirm the performance of the desinged PFC boost converter and PSFBC controller, the simulation is progressed by PSIM 9.0. The experiment prototype of PFC boost convert and PSFBC with a rating 3.3 kW is constructed. The control algorithms are implemented on TMS320VC33 DSP control board.