双凸极永磁电动机霍尔位置调整方法

Adjustment of Hall Sensor Position in Doubly Salient Permanent Magnet Motor

双凸极永磁电动机运行时,必须配备位置传感器,并调整到合适的位置,为其提供准确的换相信号。文中针对12/8极转子斜槽式双凸极永磁电机,给出两种基于三相反电势对称度及正弦度良好的发电态霍尔位置调整方法,但因电机设计及机械加工等因素造成的相电势非完全正弦或三相不对称,这两种基本调整方法很难使三相霍尔同时调整到满足理想位置关系。为此,文中提出“发电粗调,电动微调”的霍尔位置调整方法2,即先在发电态下粗调霍尔位置,再在电动态下,以非导通相绕组电流尾巴的对称度及系统效率最大化作为判断依据,进行霍尔位置的细微调整。该方法已在双凸极永磁电动机实际运行中得到了检验及应用。

For the doubly salient permanent magnet （DSPM） motor, position sensors are nececssary to provide the correct rotor position for the motor controller and correct commutation signals. Two basic position adjustment methods are given based on a 12/8-pole flume-rotor DSPM motor. Three Hall sensors mounted on its rotor part can obtain position signals. But due to the non-sinusoidal winding back electro motive force （EMF） or asymmetry of three winding EMFs caused by the motor, the fabrication and other reasons, it is difficult to adjust all Hall sensors to meet their ideal position relationships. Thus a novel adjustment method-2 by the coarse-adiustment in the generation state and by the trim-adjustment in the motor-driven state is proposed. Firstly, Hall sensor positions are coarse-adjustment when DSPM is used as a generator. Then by the basic adiustment method-2, the Hall positions are trim-adjusted when DSPM is used as a motor. The symmetry of non-conducting winding current tails and the maximum overall efficiency are used as the adjustment rule. The method is confirmed to be correct and feasible in the applications of DSPM motor.