Comparative Analysis of Torque and Flux Ripples for Several Direct Torque Control Strategies of PMSM

A novel direct torque and flux control of permanent magnet synchronous motor with analytically-tuned PI controllers

“…Bo-Wen et al in [18], a DTC method based on active disturbance rejection [19] presented DTC in flux weakening region. In the hysteresis controllers were replaced with PI controllers without any analytical method for selection of the proportional and integral gain values of the PI controllers [20]- [22]. The results of these works show various levels of torque ripples which are not suitable for applications requiring minimal ripples in torque and speed.…”

“…However, several researchers have tried different methods in an attempt to reduce these ripples and improve the overall performance of the traditional DTC. Some of these methods include: the hysteresis regulators-based stator voltage vector selection in [16], the active disturbance rejection controller DTC in [18], the MT-frame flux weakening DTC in [19], the SVM-based predictive torque control in [20], the PI based DTC with pole placement technique in [21], and sliding mode control with PI-based DTC in [22]. Apart from the predictive torque algorithm in [21] that significantly reduced the torque ripples, other algorithms did not achieve much in terms of torque and flux ripples reduction.…”