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Article

Nonsingular Terminal Sliding Mode Control of PMSM Based on Improved Exponential Reaching Law

1
School of Electrical and Electronic Engineering, Changchun University of Technology, Changchun 130000, China
2
State Key Laboratory of Automobile Simulation and Control, Jilin University, Changchun 130000, China
*
Author to whom correspondence should be addressed.
Academic Editors: Antonio J. Marques Cardoso and Bor-Ren Lin
Electronics 2021, 10(15), 1776; https://doi.org/10.3390/electronics10151776
Received: 12 May 2021 / Revised: 13 July 2021 / Accepted: 22 July 2021 / Published: 24 July 2021
(This article belongs to the Section Systems & Control Engineering)
When a permanent magnet synchronous motor runs at low speed, the inverter will output discontinuous current and generate torque ripple; when the motor is runs at high speed, a large amount of stator harmonic current generates, which affects its speed following ability and torque stability. To ensure the fast and smooth switching of a permanent magnet synchronous motor in the full speed domain, this paper proposes the nonsingular terminal sliding mode control of PMSM speed control based on the improved exponential reaching law. Firstly, the improved exponential reaching law is composed of the state variables and power terms of the sliding mode surface functions. The reaching law function is designed in sections to balance the fast dynamic response of the system and chattering control. Secondly, an improved exponential reaching law based on the sliding mode control strategy of the PMSM speed loop is proposed. By designing the initial value of the integral term in the nonsingular terminal sliding mode surface function, the initial state of the system is located on the sliding mode surface. The integral sliding mode surface is used to reduce the system steady-state error, while the proposed sliding mode reaching law is used to increase the arrival speed and suppress system chattering, ultimately affecting modeling error problems, complex working conditions, and uncertainty factors. This paper proposes a sliding mode observer based on an improved exponential reaching law to compensate for the disturbances. Lyapunov stability theory can prove that this system can make the speed tracking error converge to zero in finite time. Hardware-in-the-loop experiments were used to validate the effectiveness of the proposed method. View Full-Text
Keywords: permanent magnet synchronous motor (PMSM); nonsingular terminal sliding mode (NTSM) control; improved exponential reaching law (NSMRL); sliding mode observer (SMO) permanent magnet synchronous motor (PMSM); nonsingular terminal sliding mode (NTSM) control; improved exponential reaching law (NSMRL); sliding mode observer (SMO)
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MDPI and ACS Style

Jiang, C.; Wang, Q.; Li, Z.; Zhang, N.; Ding, H. Nonsingular Terminal Sliding Mode Control of PMSM Based on Improved Exponential Reaching Law. Electronics 2021, 10, 1776. https://doi.org/10.3390/electronics10151776

AMA Style

Jiang C, Wang Q, Li Z, Zhang N, Ding H. Nonsingular Terminal Sliding Mode Control of PMSM Based on Improved Exponential Reaching Law. Electronics. 2021; 10(15):1776. https://doi.org/10.3390/electronics10151776

Chicago/Turabian Style

Jiang, Changhong, Qiming Wang, Zonghao Li, Niaona Zhang, and Haitao Ding. 2021. "Nonsingular Terminal Sliding Mode Control of PMSM Based on Improved Exponential Reaching Law" Electronics 10, no. 15: 1776. https://doi.org/10.3390/electronics10151776

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