An Inverter Nonlinearity Compensation Method with Multi-Step Waves for Speed-Sensor less Induction Motor Drives

Le résumé fourni par la source

In induction motor control system, the nonlinear characteristics of the inverter will increase the harmonic content of the current, and also increase the output torque ripple of the motor. Since the nonlinearity of the inverter can cause the inaccuracy of the observer to the input signal, its adverse effect is obvious in sensorless control systems. Thus, the nonlinear compensation of the inverter is necessary to improve the performance of the control system. The traditional voltage compensation method will inevitably produce wrong compensation signal in the low current region. Thus, it is not practical to compensate the nonlinear problem of the inverter in practical applications. On this basis, the causes of inverter nonlinearity are analyzed in detail. The multi-step equidistant waves are used to compensate, and the compensating voltage signal is selected accurately by the command current. The experimental results show that the proposed voltage compensation method is more effective than the traditional compensation method.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.