Guo Yibo, Pan Lingyun, Yang Yang, Gong Yimin, Che Xiaolei
College of Physics, Jilin University, Changchun 130000, China.
Sensors (Basel). 2024 Dec 13;24(24):7970. doi: 10.3390/s24247970.
The sensorless vector control method of synchronous reluctance motors (SynRMs), based on extended back electromotive force (EMF) or flux observation, has been widely applied in the medium- or high-speed range. However, in the low-speed and low-current range, the extended back-EMF and flux are nearly zero. The use of the current frequency () control method can enable the motor to pass through the low-speed region, thereby ensuring that the back-EMF and flux reach a large value. control methods that are widely used in permanent magnet synchronous motors (PMSMs) may encounter many problems when applied to SynRMs. The most serious issue is the inability to adjust the current amplitude to control the rotor angle and achieve a smooth transition to sensorless control. Based on various issues, this article proposes an control method with four stages that can be used in SynRMs. This method uses a simple inductance identification method to solve the flux saturation phenomenon of SynRMs and then uses high-frequency voltage injection to continuously adjust the current amplitude and rotor angle position in conjunction with this inductance identification method. The effectiveness of this method is experimentally demonstrated on a 5.5 kW SynRM.
基于扩展反电动势（EMF）或磁链观测的同步磁阻电机（SynRMs）无传感器矢量控制方法已在中高速范围内得到广泛应用。然而，在低速和低电流范围内，扩展反电动势和磁链几乎为零。采用电流频率（）控制方法可使电机通过低速区域，从而确保反电动势和磁链达到较大值。在永磁同步电机（PMSMs）中广泛使用的控制方法应用于SynRMs时可能会遇到许多问题。最严重的问题是无法调节电流幅值来控制转子角度并实现向无传感器控制的平滑过渡。基于各种问题，本文提出了一种可用于SynRMs的四阶段控制方法。该方法采用简单的电感识别方法解决SynRMs的磁链饱和现象，然后结合该电感识别方法使用高频电压注入来连续调节电流幅值和转子角度位置。该方法的有效性在一台5.5kW的SynRM上通过实验得到了验证。
