In this paper, electric vehicle (EV) system using bi-directional DC-DC converter which can control the type of low-voltage and high-current battery is proposed. Proposed system uses isolated DC-DC converter for voltage compensation. The proposed topology has a form in which the inputs are connected in parallel and the outputs are connected in series in battery and isolated converters. The basic concept of dc-dc converter is integrated boost-flyback converter. This converter has the advantage of high step-up voltage by boost converter and system isolation by flyback converter. The motor driving mode for the EV can be divided into two such as motoring mode and regenerative braking mode. In the EV system, the regenerative braking control is used during deceleration. The simulation of motoring and regenerative braking mode using proposed system is performed and the result, verify the proposed control method.
Index Terms--ElectricVehicle (EV), Integrated Boost-Flyback Converter, Low-Voltage and High-Current Type Battery, IPMSM Control.
In the electric vehicle(EV) system, the Technology for the efficient operation of a battery is one of the most important technologies. By the voltage difference between the cell and between modules of electric car battery, it will not be able to efficiently use the battery. Using the voltage balancing method to each of the battery modules to increase the available space for the battery module, it is possible to more efficient battery operation. This paper provide the EV system of applying the Balancing method of the battery module and the torque control of interior permanent magnet synchronous motor(IPMSM) for EV using this method.
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