Dynamic Hysteresis Torque Band for Improving the Performance of Lookup-Table-Based DTC of Induction Machines

被引：49
作者：
Alsofyani, Ibrahim Mohd [1 ]
Idris, Nik Rumzi Nik [2 ]
Lee, Kyo-Beum [1 ]
机构：
[1] Ajou Univ, Dept Elect & Comp Engn, Suwon 16499, South Korea
[2] Univ Teknol Malaysia, Fac Elect Engn, Johor Baharu 81310, Malaysia
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2018年 / 33卷 / 09期
基金：
新加坡国家研究基金会;
关键词：
Direct torque control (DTC); dynamic hysteresis torque band (DHTB); flux regulation; induction motor (IM); sensorless control; CONSTANT SWITCHING FREQUENCY; SPACE VECTOR MODULATION; PWM INVERTER; MOTOR; SPEED; STRATEGY; IMPROVEMENT; CONTROLLER; REDUCTION; OPERATION;
D O I：
10.1109/TPEL.2017.2773129
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The magnitude of hysteresis torque band has a considerable effect on the performance of two-level direct torque control (DTC) of induction machines. The conventional DTC fails at low speed due to the poor flux regulation. In this paper, two dynamic hysteresis torque band (DHTB) strategies for the conventional DTC are proposed to solve this problem by dynamically altering the amplitude of hysteresis torque band based on a flux error range. In this way, the simplicity of DTC algorithm is retained since it only requires a minor modification on its structure. The paper also presents further analysis on flux degradation, particularly the droop in between the flux sectors. In addition, the switching frequency effect of reverse voltage vectors for both DHTB schemes is investigated on the performance of the speed-sensorless DTC drive. The effectiveness of the proposed schemes is confirmed by simulation and experimental validation. Results show a significant enhancement in the flux regulation and dynamic torque response from zero motor speed.
引用
收藏
页码：7959 / 7970
页数：12
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