This paper proposes a new method of sensorless vector control for induction motors, in which the motor speed is estimated by both instantaneous reactive power and variation of magnetizing current.
提出了一种异步电机无速度传感器矢量控制的新方法，用瞬时无功功率和励磁电流变化来估计电机转速。
Instantaneous center of rotation-velocity vector method is the integration of instantaneous center of rotation analysis and velocity vector method.
将瞬心分析与速度矢量法相结合的瞬心—速度矢量法较转化机构法更为清晰、明了、直观。
Thirdly, this paper introduces academic base used in this equipment , mainly are instantaneous Var power theory and Special Vector Method for generating pulse used springing IGBT;
然后是三相四线制无功补偿发生器的理论基础（主要是瞬时无功功率理论和IGBT脉冲产生的空间矢量法）；
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