Abstract
Permanent magnet synchronous motors (PMSMs) are known as highly efficient motors and are slowly replacing induction motors in diverse industries. PMSM systems are nonlinear and consist of time-varying parameters with high-order complex dynamics. High performance applications of PMSMs require their speed controllers to provide a fast response, precise tracking, small overshoot and strong disturbance rejection ability. Sliding mode control (SMC) is well known as a robust control method for systems with parameter variations and external disturbances. This paper investigates the current status of implementation of sliding mode control speed control of PMSMs. Our aim is to highlight various designs of sliding surface and composite controller designs with SMC implementation, which purpose is to improve controller’s robustness and/or to reduce SMC chattering. SMC enhancement using fractional order sliding surface design is elaborated and verified by simulation results presented. Remarkable features as well as disadvantages of previous works are summarized. Ideas on possible future works are also discussed, which emphasize on current gaps in this area of research.
Highlights
Permanent magnet synchronous motors (PMSMs) are widely used in low- to mid-power applications and high performance drives, e.g., robotics, electric vehicles and machine tools
The proposed controller is simulated in MATLAB/Simulink environment to evaluate its performance as a speed regulator
The main idea behind composite Sliding mode control (SMC) is to have an adaptive sliding surface design based on uncertainties and disturbances, compared to a sliding surface design with fix values in conventional
Summary
Permanent magnet synchronous motors (PMSMs) are widely used in low- to mid-power applications and high performance drives, e.g., robotics, electric vehicles and machine tools. They are preferred over brush-type motors and are gradually replacing induction motors in various fields of application due to their advantages such as compact structures, high air-gap flux density, high power density, high torque to inertia ratio, and high efficiency. Field oriented control (FOC) of PMSMs has been a focus for many researchers. This technique simplifies the motor modeling, resulting in a simplified controller design.
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