A Harmonic Fully Decoupled Motor Control Model Considering Resistance and Inductance Parameter Variations and Non-ideal Back EMF

In the application of high-speed dual three-phase (DTP) permanent magnet synchronous machine (PMSM), due to the high fundamental frequency, wide speed range, skin effect, proximity effect and additional high-frequency core loss, the resistance and inductance parameters of the motor vary with the frequency. The variations of resistance and inductance parameters will lead to the mismatch of motor current loop control parameters and worsen the current control performance. In addition, the non-ideal back EMF in high-speed motor is also an important factor leading to the decline of current control performance. In order to introduce non-ideal back EMF information and resistance inductance parameters of different frequencies into the motor model to realize the accurate control of motor current, a motor control model with harmonic separation is proposed, based on the extended dimension vector space decomposition (VSD) coordinate transformation. The proposed model can realize the decoupling control of different frequency harmonics of the motor.