Variable damping injection control of PMSM drive systems based on isolated shoot‐through Z‐source inverter

Abstract

This study proposes a novel permanent magnet synchronous motor (PMSM) driven system based on isolated shootthrough Z-source inverter (IST-ZSI). The IST-ZSI is utilised to replace the traditional Z-source inverter. Compared with the conventional Z-source inverter-based PMSM drive system, the new drive system can not only solve the coupling of the boost factor and modulation but also provide a large regulation range of the output voltage. For the PMSM drive system, a variable damping injection controller is proposed via the passivity-based control and maximum torque per ampere control principle. Then, the load torque observer is designed to improve the stability of the PMSM system with uncertain load torque. The simulation and experimental results show that the variable damping injection control has satisfactory dynamic and static control performance.

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“…Then, the load torque observer is designed to improve the stability of the PMSM system with uncertain load torque. The simulation and experimental results show that the variable damping injection control has satisfactory dynamic and static control performance [29].…”

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“…Zhang Yifang et al [10] deduced the in uence of the change of harmonic current on the system stability by using the stability analysis theory and designed a control method to compensate the harmonic current to suppress the vibration of the rolling machine drive system. Youdong Lyu et al [11] built a load torque observer and presented a variable damping injection controller based on passivity control and maximum torque per ampere (MTPA) control principles to improve the stability of PMSM with unpredictable load torque. Khan I u et al [12] used the concept of a stable manifold to design a nonlinear reduced-order disturbance observer to make the system response asymptotically stable.…”