Traditional permanent magnet synchronous motor (PMSM) drive controller usually needs at least two phase current sensors to obtain feedback current to achieve high-precision control. However, this method not only increases the cost, but also may affect the reliability of the system due to the failure of the current sensor. In order to solve this problem, this paper proposes a control method of PMSM drive system without current sensor. In this method, the sliding mode observer (SMO) is used to estimate the dq-axes current, and the stability of the observer is analyzed by Lyapunov stability theorem, thus successfully eliminating the dependence on the current sensor. Through simulation research, this paper compares the control performance of current predictive control method with current sensor and without current sensor. The results show that the proposed method is comparable to the traditional current sensor method in control performance.
An Improved Current Sensorless Model Predictive Control for Permanent Magnet Synchronous Motor Drives
2024-10-10
547830 byte
Conference paper
Electronic Resource
English
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