scholarly journals Sensorless Control for Non-Sinusoidal Five-Phase Interior PMSM Based on Sliding Mode Observer

2021 ◽  
Vol 23 (6) ◽  
pp. 445-454
Author(s):  
Youssouf Mini ◽  
Ngac Ky Ngac Ky ◽  
Eric Semail
Keyword(s):  
Control Strategy ◽  
Sliding Mode ◽  
Sensorless Control ◽  
Harmonic Component ◽  
Sliding Mode Observer ◽  
Third Harmonic ◽  
The Third ◽  
Three Phase ◽  
Interior Permanent Magnet ◽  
Harmonic Components

This paper proposes a sensorless control strategy based on Sliding Mode Observer (SMO) for a Five-phase Interior Permanent Magnet Synchronous Machine (FIPMSM), with a consideration of the third harmonic component. Compared to conventional three-phase machines, the third harmonic of back electromotive force (back-EMF) contains more information. Thus, in this paper, the first and third harmonic components of the five-phase machine are considered to estimate the rotor position which is necessary for the vector control. Simulation results are shown to verify the feasibility and the robustness of the proposed sensorless control strategy.

scholarly journals Iterative sliding mode observer for sensorless control of five-phase permanent magnet synchronous motor

2017 ◽  
Vol 65 (6) ◽  
pp. 845-857
Author(s):  
J. Yang ◽  
M. Dou ◽  
D. Zhao
Keyword(s):  
Permanent Magnet ◽  
Sliding Mode ◽  
Sensorless Control ◽  
Permanent Magnet Synchronous Motor ◽  
Sliding Mode Observer ◽  
Motor Speed ◽  
Third Harmonic ◽  
Rotor Position ◽  
The Third ◽  
Three Phase

AbstractDue to the star connection of the windings, the impact of the third harmonic which does not exist in three-phase permanent magnet synchronous motor (PMSM) cannot be ignored in five-phase PMSM. So the conventional sensorless control methods for three-phase PMSM cannot be applied for five-phase PMSM directly. To achieve the sensorless control for five-phase PMSM, an iterative sliding mode observer (ISMO) is proposed with the consideration of the third harmonic impact. First, a sliding mode observer (SMO) is designed based on the fivephase PMSM model with the third harmonic to reduce the chattering and obtain the equivalent signal of the back electromotive force (EMF). Then, an adaptive back EMF observer is built to estimate the motor speed and rotor position, which eliminates the low-pass filter and phase compensation module and improves the estimation accuracy. Meanwhile, by iteratively using the SMO in one current sampling period to adjust the sliding mode gains, the sliding mode chattering and estimation errors of motor speed and rotor position are further reduced. Besides, the stability of the SMO and the adaptive back EMF observer are demonstrated in detail by Lyapunov stability criteria. Experiment results verify the effectiveness of the proposed observer for sensorless control of five-phase PMSM.

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