K. A. Chinmaya
ABSTRACT
The most dominant part of a plug-in electric vehicle (PEV) is its charger and propulsion system. These two parts are collectively referred as power electronic interface (PEI) of PEV. This paper proposes an onboard integrated charger with single-stage converter, coupled with feed-forward field-oriented controlled (FFOC) induction motor drive in the propulsion system. An improved control strategy to operate this PEI is also developed. Single-stage DC/DC converter utilized in PEI contains the least number of components compared to other existing converters. It can perform buck/boost operation in all the three modes of operation, i.e. plug-in charging, propulsion and regenerative braking. Propulsion drive in the PEI is composed of PWM converter fed three-phase induction motor drive. When a drive is operated in a closed loop, variation in load torque hinders the speed of the motor, consequently affecting the system performance. To avoid this, field-oriented controlled induction motor drive presented in this paper uses an additional feed-forward loop for the resilient speed control under input load disturbances.
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Index Terms
- A compact integrated charger with disturbance reduced induction motor drive for plug-in electric vehicles (PEVs)
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