摘要
主要阐述了以转矩脉动最小化为目的的无刷直流电机(BLDCM)直接转矩控制技术。传统的无刷直流电机直接转矩控制系统通常因采用一个周期一个电压矢量和低电感,造成较大的相电流和转矩抖动,故选取了滞环转矩控制和PWM方式相结合的转矩控制方式。此外,该直接转矩控制系统在两相半桥120°导通方式下,每120电角度发生一次较大的换相转矩脉动,因此在详细分析产生转矩脉动根源的基础上,提出了正负参考转矩下的新半桥调制模式开关管状态查询表。最后,所提直接转矩控制系统的转矩脉动最小化方案通过四象限运行时的Matlab仿真和DSP驱动实验,验证了其可行性和有效性。
This paper mainly describes a direct torque control strategy of brushless DC motor to minimize torque ripple. In the traditional direct torque control system, brushless DC motor has large current and torque ripple, for one voltage vector applied in one cycle and its low inductance. This paper combines hysteresis torque control with PWM mode to control torque. In addition, when the direct torque control system operating in the two-phase half-bridge 120° conduction mode, large torque ripple in commutation appears every 120 electrical degree, thus on the basis of analyzing the root of torque ripple in detail, this paper puts forward the lookup table of switching devices states of new half-bridge modulation mode in the positive and negative reference torque. Finally, simulation by Matlab and experiment results from DSP are presented to verify the feasibility and effectiveness of the proposed strategy operating in four-quadrant operation.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第1期139-146,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金委员会与宝钢集团有限公司联合资助项目(U1260203)
河北省自然科学基金资助项目(E2013203380)
关键词
无刷直流电机
直接转矩控制
转矩脉动最小化
四象限运行
Brushless DC motor（BLDCM）, direct torque control（DTC）, torque ripple minimization,four-quadrant operation
