Determining slip frequency for control of asynchronous motor - calculating cross product of stator current voltage and frequency vectors to increase stator frequency bandwidth towards DC

摘要

The asynchronous motor slip frequency is derived from the internal torque divided by the square of the rotor flux. The inner torque is determined as a scalar product of the stator current and the rotor EMF vectors, multiplied by the stator frequency. The square of the rotor flux multiplied by the stator frequency is defined by a given differential equation in terms of the rotor time constant, the rotor reactance and the differential quotient of the stator frequency. USE - For induction motor drive with high dynamic performance.