A Novel Direct Torque Control System with New Zero Vector for Two-Three Conduction Brushless DC Motors

doi:10.7652/xjtuxb202004011

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A Novel Direct Torque Control System with New Zero Vector for Two-Three Conduction Brushless DC Motors

更新时间：2025-07-09

- A Novel Direct Torque Control System with New Zero Vector for Two-Three Conduction Brushless DC Motors
- Vol. 54, Issue 4, Pages: 85-92(2020)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202004011
  CLC： TM36+1;TP273
- Online First：10 April 2020，
  
  Published：2020
- 稿件说明：
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A Novel Direct Torque Control System with New Zero Vector for Two-Three Conduction Brushless DC Motors[J]. 2020, 54(4): 85-92.
DOI：

A Novel Direct Torque Control System with New Zero Vector for Two-Three Conduction Brushless DC Motors[J]. 2020, 54(4): 85-92. DOI： 10.7652/xjtuxb202004011.

摘要

为了解决无刷直流电机转矩脉动幅值大的问题

提出一种新型零矢量的二三导通无刷直流电机直接转矩控制方法。该方法利用二相、三相交替导通的驱动方式

使用直接转矩控制方法

形成12个扇区

并定义了一种新型零矢量

改进了空间电压矢量选择表

降低了转矩脉动幅值。MATLAB仿真结果表明:当电机空载且以额定转速2 000 r/min运行时

相比于传统零矢量

新型零矢量能使转矩脉动幅值降低约40.94%; 当电机负载为4.3 N·m且以500 r/min低速运转时

相比于传统零矢量

新型零矢量能使转矩脉动幅值降低约47.40%; 当电机负载为4.3 N·m且以额定转速2 000 r/min高速运行时

新型零矢量使转矩脉动幅值降低约32.32%。不论电机运行于空载还是负载

低速还是高速

新型零矢量均能起到降低转矩脉动幅值的作用。该方法有效降低了电机的运行噪声

使电机运转更加平稳。新型零矢量可以应用于无刷直流电机的各种导通方式

对无刷直流电机应用于高性能场合具有重要意义。

Abstract

A direct torque control method with a new -ero vector for two-three conduction brushless DC motors is proposed to solve the problem of large torque ripple amplitude in brushless DC motors. The method uses an alternate conduction driving mode of two-phase and three-phase and a direct torque control method to form 12 sectors

and defines a new type of -ero vector to improve the space voltage vector selection table and to reduce torque pulsation amplitude. MATLAB simulation results and a comparison with the system using traditional -ero vector show that the proposed system using the new -ero vector reduces the torque ripple amplitude by about 40.94% when the motor is running without load at a rated speed of 2 000 r/min; when the motor is running with a 4.3 N-m load at a low speed of 500 r/min

the proposed method reduces the torque ripple amplitude by about 47.40%; and when the motor is running with a 4.3 N-m load at a rated high speed of 2 000 r/min

the proposed method reduces the tor

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