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유도전동기의 제어를 위한 PWM 인버터의 새로운 전류제어기
鄭東和,李昌烈 順天大學校 1996 論文集 Vol.15 No.1
An induction motor is one the suitable motors for the electric vehicles. The induction motor used in the electric vehicle has been generally controlled based on the vector control method to obtain well dynamic torque response. The current control strategy plays the most important role in current-controlled PWM inverters in which quick current response and low harmonic current content to suppress torque ripples and acoustic noise are required. Howerever, these two requirements contradict each other. That is, the switching mode, having a high current derivative, must be chosen to produce the high speed current response while the switching mode, having low current harmonic content. For the latter purpose, many control schemes have been published. For example, Holtz et al. proposed the predictive controller [1], and it is an excellent control scheme. However, this controller is not simple because it includes complicated calculations. In this paper the authors propose a new control scheme which is not a predictive control but a feedback control. It is able to suppress the high harmonic current in steady state and also solve the quick response problem in transient state.