高速永磁无刷直流电机无位置全转速控制策略

发布时间：2018-06-25 12:22

本文选题：磁悬浮鼓风机 + 无刷直流电机　；参考：《电机与控制学报》2017年04期

【摘要】：针对高速磁悬浮大功率永磁无刷直流电机无位置传感器起动问题,分析了高速磁悬浮无刷直流电机运行时导通相磁链函数与相电压的精确表达式,给出了转子位置和电机磁链的函数方程,分析了高速磁悬浮无刷直流电机低速时转子位置难以检测的原因。据此分析提出了一种基于高速电机绕组磁链函数的新型无位置控制G函数方法,以换相前后非换相相电流幅值等值为控制目标,以G函数换相阈值为控制量,通过PI调节来保证相位可靠校正,实验验证了该闭环校正方法应用于磁悬浮鼓风机无刷直流电机时,在20 000 r/min范围内能够对换相信号误差进行了实时补偿,实现全转速运行。
[Abstract]:In view of the sensorless starting problem of high speed magnetic levitation high power permanent magnet brushless DC motor, the exact expressions of the flux function and phase voltage of the conduction phase of the high speed magnetic levitation brushless DC motor are analyzed. The functional equations of rotor position and flux linkage are given, and the reason why the rotor position is difficult to detect at low speed of high speed magnetic levitation brushless DC motor is analyzed. Based on this analysis, a new position free control G function method based on flux chain function of high speed motor winding is proposed. The amplitude equivalent of non commutation current before and after commutation is taken as the control target, and the commutation threshold of G function is taken as the control quantity. The phase reliability correction is ensured by Pi regulation. The experimental results show that the closed-loop correction method is applied to the brushless DC motor of the magnetic suspension blower, and it can compensate the error of the replacement signal in the range of 20 000 r/min, and realize the full speed operation.
【作者单位】：北京航空航天大学惯性技术国防科技重点实验室;北京航空航天大学新型惯性仪表与导航系统技术国防重点学科实验室;北京市高速磁悬浮电机技术及应用工程技术研究中心;
【基金】：国家自然科学基金(61374029);国家自然科学基金(61403015)
【分类号】：TM33

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