Field acceleration method is a new control method for induction motor. Its electro-magnetic process can be analysed with the transient equivalent circuit.
磁场加速法是一种新型、高性能的感应电动机控制方法，其电磁过程可用暂态等值电路进行分析。
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The correct control condition given in this paper is important to structure the practical field acceleration control system for induction motor.