A Novel SHMPWM Technique for Sensorless Control in High-Power PMSM
A Novel SHMPWM Technique for Sensorless Control in High-Power PMSM
复制标题
用于高功率 PMSM 无传感器控制的新型 SHMPWM 技术
DOI：
10.1155/2015/315898
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发表时间：
2015-02
影响因子：
--
通讯作者：
Shukan Cheng
中科院分区：
文献类型：
--
作者：
Lixiao Gao;Yue Liu;Feng Chai;Shukan Cheng
针对大功率永磁同步电动机（PMSM）驱动系统开关频率低的限制和恶劣环境下对无位置传感器控制的渴望，提出了一种基于选择性谐波抑制脉宽调制（SHMPWM）技术的大功率PMSM无位置传感器PWM控制方案。对传统的SHMPWM非线性超越方程提出了一种新的约束条件，在保证抑制非期望谐波信号的同时，有选择地产生一定数量的谐波信号。同时，通过带通滤波器提取出幅值和相位相差120°的等阶谐波信号，相当于在电机自然坐标系中注入旋转电压矢量，利用该等阶谐波信号可以估计转子位置。设计了这种新型调制技术的非线性超越方程，并对其数值计算方法进行了分析。根据各次谐波信号设计了转子位置观测器。仿真结果表明，该方法有效地抑制了系统的谐波，实现了无位置传感器控制。
In view of the low switching frequency restriction of high-power permanent magnet synchronous motor (PMSM) drive system and longing for sensorless control in hostile conditions, a novel PWM control scheme, born out of selective harmonic mitigation pulse width modulation (SHMPWM) technique, was proposed for sensorless control of high-power PMSM. A new enhanced constraint was placed on the traditional SHMPWM nonlinear transcendental equation to selectively generate constant amount of a certain order harmonic signals while guaranteed that the undesired harmonic signals can be suppressed. At the same time, the order harmonic signals were extracted by band-pass filter, which had the constant amplitude and phase angle difference of 120°, equivalent to inject rotating voltage vector in the natural coordinate system of motor, and the rotor position can be estimated using the order harmonic signals. The nonlinear transcendental equation of the novel modulation technique had been designed, and its numerical method had been analyzed. The rotor position observer had been designed according to the order harmonic signals. Simulation results verify that the harmonic suppression of the system was implemented, and the sensorless control was efficient by the novel SHMPWM technique.
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