A simplified sensorless speed control of permanent magnet synchronous motor using model reference adaptive system

Abstract

A simplified sensorless speed control of permanent magnet synchronous motor (PMSM) using model reference adaptive system (MRAS) is presented. The MRAS is designed and incorporated in a complete closed loop PMSM control system fed by a three-phase inverter that utilizes a simplified hysteresis current control (HCC) to generate gating signals. Accurate rotor position, being essential in PMSM control, is estimated using MRAS rather encoders and resolvers which are explicit position sensors thereby eliminating the drawbacks of the traditional speed sensors in drive systems. The performance of this model is compared with an existing model that utilizes encoders and resolvers. Superior performance was obtained from this new model with MRAS. After initial starting transients, it is observed that the rotor speed for the model with MRAS settled to steady state at 0.10 seconds as against the model with speed sensor which attained steady state at 0.31 seconds. Torque response follows the same pattern to return to the load torque of 11Nm at steady state after starting. After speed reversal, the model with MRAS restored to steady state to track the negative speed command at 0.44 seconds. This is a superior performance compared to the model with speed sensor which settled at 0.60 seconds after speed reversal. The results have clearly shown the superiority of sensorless MRAS over traditional drive models with speed sensors. The software used for this research is MATLAB/Simulink 2017 model.

A robust high-speed sliding mode control of permanent magnet synchronous motor based on simplified hysteresis current comparison

“…where, , , , , , , , , , , , are as defined in [7]. The constant rotor permanent magnet flux is , hence = 0.…”

“…They have superior characteristics such as high torque/inertia ratio, compact size, lower noise and accurate positioning [1]- [5]. PMSMs have the advantage of high efficiency when compared with the induction motor [6], high reliability, fast dynamics and very good compatibility [7]- [8]. The absence of rotor winding due to the use of the rotor magnets is responsible for the enhanced features.…”

PID Control of Permanent Magnet Synchronous Motor Based on Improved Actor-Critic Framework

“…In recent years, the most common speed control of PMSM is PID control, direct torque control and vector control. Based on these methods, adding more complex and advanced intelligent control methods is an important research direction in the current control field, such as sliding mode control, neural network, fuzzy control, adaptive control and other methods [1][2][3][4].…”

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

“…This has resulted in intensified research activities in the design, analysis, and control of PMSM. In most industrial applications where PMSMs are used, high precision in speed and torque is usually required [4]- [9]. It has been established that direct torque control (DTC) offers better dynamic performance compared to field orientation control (FOC) especially for spplications requiring high precision, sensitivity, and minimized torque ripples [10]- [14].…”