Parameters identification for Interior Permanent Magnet Synchronous Motor driven by sensorless control

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[Abstract] In this paper, a new parameter identification method for Interior Permanent Magnet Synchronous Motor (IPMSM) driven by sensorless control is proposed. Noise and vibration in mechanical plant becomes larger if rotor position estimation error occurs. Furthermore, the rotor position estimation error cause noise and vibration. When a load torque and a reference motor speed are constant, and phase voltages and phase currents in multiple stationary states are measured, motor parameters can be identified even if an estimated rotor position does not correspond with the rotor position. Furthermore, this paper proposes a new sensorless control method that derives the position by solving motor voltage equation. It is shown that the method is able to estimate the true position even if the motor is in acceleration. Numerical simulations with implementation of Pulse Width Modulation (PWM) inverter are illustrated to verify the effect of the methods.

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