ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Sensorless control of servo motor based on adaptive amplitude⁃phase square wave injection
Received date: 2024-01-22
Revised date: 2024-02-28
Accepted date: 2024-05-08
Online published: 2024-05-08
Supported by
National Science Fund for Distinguished Young Scholars(52025073);Major Program of National Natural Science Foundation of China(51991383);Aeronautical Science Foundation of China(202200580R3001)
Existing sensorless control methods are constrained by the convergence rate and estimation accuracy， and is difficult to be directly applied to high dynamic electro-mechanical servo systems. To improve the estimation accuracy of sensorless control under high dynamics， this paper proposes a novel sensorless control method for the permanent magnet synchronous motor based on amplitude-phase adaptive square wave injection. By injecting high-frequency square wave voltage signals and demodulating the high-frequency response current of the q-axis， high dynamic rotor position estimation is achieved. At the same time， the amplitude and phase of the injected voltage are adaptively adjusted according to the real-time operating status of the motor. Therefore， the estimation errors caused by inverter nonlinearity and motor cross-saturation effect are effectively reduced. Finally， the performance of the method proposed is experimentally verified on a 2 kW servo motor platform. The experimental results show that the proposed method can enhance the accuracy of rotor position estimation， while achieving high dynamic characteristics of sensorless control.
Yang HE , Wangwang LI , Jinghua JI , Wenxiang ZHAO , Jihong ZHU . Sensorless control of servo motor based on adaptive amplitude⁃phase square wave injection[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2024 , 45(15) : 630211 -630211 . DOI: 10.7527/S1000-6893.2024.30211
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