电工技术学报2016，Vol.31Issue(z1)：128-136,9.
采用新型评价表的三电平逆变器占空比调制直接转矩控制
Direct Torque Control Using New Evaluation Table of Three-Level Inverter Based on Duty Cycle Modulation
陈炜 1赵迎迎 1周湛清1
作者信息
- 1. 天津大学电气与自动化工程学院 天津 300072
- 折叠
摘要
Abstract
A direct torque control using new evaluation table of three-level inverter based on duty cycle modulation is proposed for neutral-point clamped three-level inverter-fed permanent magnet synchronous motor drives in order to suppress the steady torque ripples. Firstly, the approach establishes evaluation tables including three vector evaluation tables which evaluate torque and flux of the motor and a compensatory evaluation table which evaluate back electromotive force. The tables are independent to motor parameters in the process of duty modulation adjustment. Secondly, the approach proposes two control schemes for low speed and high speed of the motor. Small vectors and zero vector are employed in the scheme of low speed. Big/medium vectors and small vectors are employed in the scheme of high speed. In this way, the steady of torque is ensured by using the small vectors. Then the vector and duty selection scheme is established based on the cost functions. The proposed algorithm are verified by experiments of a 6kW permanent magnet synchronous motor (PMSM). And the experiment results show that the steady torque ripples are suppressed effectively.关键词
中点钳位型三电平逆变器/直接转矩控制/永磁同步电机/转矩波动抑制Key words
Neutral-point-clamped three-level inverter/direct torque control/permanent magnet synchronous motor/torque ripples reduction分类
信息技术与安全科学引用本文复制引用
陈炜,赵迎迎,周湛清..采用新型评价表的三电平逆变器占空比调制直接转矩控制[J].电工技术学报,2016,31(z1):128-136,9.
