A Comparative Study on Operating Characteristics of PMSM Based on Direct Torque Control in Low Speed Region

2020 ◽  
Author(s):  
Zheyu Wang ◽  
Yukinori Inoue ◽  
Shigeo Morimoto ◽  
Masayuki Sanada ◽  
Toshimitsu Aizawa ◽  
...  
Keyword(s):  
Comparative Study ◽  
Direct Torque Control ◽  
Torque Control ◽  
Operating Characteristics ◽  
Low Speed

scholarly journals The complex controller for three-phase induction motor direct torque control

2009 ◽  
Vol 20 (2) ◽  
pp. 256-262 ◽  
Author(s):  
Alfeu J. Sguarezi Filho ◽  
E. Ruppert Filho
Keyword(s):  
Induction Motor ◽  
Closed Loop ◽  
Direct Torque Control ◽  
Torque Control ◽  
Closed Loop System ◽  
Low Speed ◽  
Tuning Method ◽  
Three Phase ◽  
Model Complex ◽  
System Frequency

This paper proposes a design and tuning method for a complex gain controller, based on the three-phase induction motor mathematical model complex transfer function to be used in the direct torque control at low speed which is a problem so far. The design and tuning of the complex gain is done by using the closed loop system frequency-response function. Experimental results are presented to validate the controller and operation at low speed is also explored.

scholarly journals Stator Flux Observer for Induction Motor Based on Tracking Differentiator

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Dafang Wang ◽  
Zhenfei Hu ◽  
Cheng Zhu ◽  
Chuanwei Zhou ◽  
Yajing Xie
Keyword(s):  
Dynamic Error ◽  
Dynamic Performance ◽  
Direct Torque Control ◽  
Torque Control ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Speed ◽  
Tracking Differentiator ◽  
Low Pass ◽  
Stator Flux

Voltage model is commonly used in direct torque control (DTC) for flux observing of asynchronous motor. In order to improve low-speed and dynamic performance of the voltage model, a modified low-pass filter (LPF) algorithm is proposed. Firstly, the tracking differentiator is brought in to modulate the measured stator current, which suppresses the measurement noise, and then amplitude and phase compensation is made towards the stator electromotive force (EMF), after which the stator flux is obtained through a low-pass filter. This method can eliminate the dynamic error of flux filtered by LPF and improve low-speed performance. Experimental results demonstrate effectiveness and improved dynamic performance of such method.

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