基于电压空间矢量控制PMSM系统新型死区补偿方法  

Study of a Dead-Time Compensation Method for PMSM Drive Based on Voltags Space Vector Control

作　　者：肖海峰[1] 刘海龙[1] 贺昱矅[1] 姜文 

机构地区：[1]西北工业大学航海学院,西安710072 [2]国家计算机网络应急技术处理协调中心(CNCERT/CC),北京100029

出　　处：《电工技术学报》2013年第8期114-119,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(61271143);陕西省自然科学基金资助项目(2011K09-16)资助项目

摘　　要：针对逆变器死区效应产生的扰动误差电压,提出一种简单有效的死区扰动电压观测器。该观测器借助于电机转子机械响应滞后于电磁响应的特性,在一个电流采样周期内转子位置保持不变,简化电机动态电压方程,建立同步旋转坐标系中电流Δied、Δieq的变化量与定子侧电动势变化量的关系,从而确定死区扰动补偿电压,实现对死区效应的校正。该补偿算法不需要检测电流方向,避免了相电流过零钳位造成的电流方向检测不准而引起的误差。仿真与实验结果表明,该观测器对永磁同步电机调速系统的死区补偿效果明显,转矩脉动小,电流波形畸变得到明显改善。This paper presents an effective online approach for dead-time compensation of the inverter control using a simple disturbance voltage estimator. According to the rotor dynamics of rotor lagging behind the electromagnetic responses, the proposed estimator builds the relationship between variation of the current（Aied, Aieq） and the increment of the opposing electromotive force within one sampling period in the synchronous rotating reference frame. Then, the compensation of dead-time effect is carried out feedforwardly in the current control loop. With the proposed method, the dead-time compensation voltage no longer depends on current direction and prevents the compensation error because of the phasing current clamping. Theoretical analysis and measured results demonstrate that this method can obtainproper compensation of dead time voltage in the permanent magnet synchronous motor drive and, smaller proper torque pulsation. And the phasing current harmonic is suppressed effectively.

关 键 词：电压空间矢量 永磁同步电机 死区效应 扰动电压 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]