Extended Kalman Filter Based Sliding Mode Control of Parallel-Connected Two Five-Phase PMSM Drive System

Abstract

This paper presents sliding mode control of sensor-less parallel-connected two five-phase permanent magnet synchronous machines (PMSMs) fed by a single five-leg inverter. For both machines, the rotor speeds and rotor positions as well as load torques are estimated by using Extended Kalman Filter (EKF) scheme. Fully decoupled control of both machines is possible via an appropriate phase transposition while connecting the stator windings parallel and employing proposed speed sensor-less method. In the resulting parallel-connected two-machine drive, the independent control of each machine in the group is achieved by controlling the stator currents and speed of each machine under vector control consideration. The effectiveness of the proposed Extended Kalman Filter in conjunction with the sliding mode control is confirmed through application of different load torques for wide speed range operation. Comparison between sliding mode control and PI control of the proposed two-motor drive is provided. The speed response shows a short rise time, an overshoot during reverse operation and settling times is 0.075 s when PI control is used. The speed response obtained by SMC is without overshoot and follows its reference and settling time is 0.028 s. Simulation results confirm that, in transient periods, sliding mode controller remarkably outperforms its counterpart PI controller.

Virtual Line Shafting-Based Total-Amount Coordinated Control of Multi-Motor Traction Power

“…e motor is assumed to start with parameter perturbation, that is, the system compound interference 푑 2푗 ̸ = 0. A pulse interference signal ( Figure 2) is applied to motor 2 at 0.2 s, and a high-frequency strong robustness, this controller has been widely used in highprecision tracking control [21,26,27]. To guarantee that the total traction torque of the multi-motor system dynamically tracks the output torque of the virtual motor, the error between these two is denoted by .…”

Applications of Power Electronics

“…In [27], a comparative analysis of different control structures in improving the performance of dual three-phase permanent magnet synchronous motors (PMSM) is addressed. Extending the Kalman filter-based sliding mode control of a parallel-connected two five-phase PMSM drive system is explained in [28]. Since a slim DC-link drive provides a compact drive system, improving the motor drive performance and control stability through modulation and active damping is proposed in [29].…”

Current Control Methods for an Asymmetric Six-Phase Permanent Magnet Synchronous Motor

“…Compared to the traditional three-phase motors, multi-phase motors have the advantages of reduced torque ripples and fault tolerant ability [1][2][3][4]. Those with multiple three-phase stator windings enjoy popularity among the multi-phase machines (such as six-phase and 15-phase), due to the fact that not only do they have the advantages of multi-phase motors, but also the modular three-phase structures can inherent the use of the well established three-phase topology [1,2].…”