直流无刷电机Lead Angle of Trigger对效率的影响

flyinrain

直流无刷电机仿真时，电路设计中的Lead Angle of Trigger是什么意思？我在仿真时对其做了调整，该量对于电机效率的影响非常大。在物理电路中如何实现？是霍尔的位置？还是驱动电路的占空比？

XIAO_G

Enter the trigger’s lead angle in electrical degrees in the Lead Angle of Trigger field. The trigger angle is the point at which the magnetic poles interact to begin the motion of the motor. An angle of 0 means that each phase is triggered when its axis is aligned with the rotor slot center. The trigger’s lead angle is shown in the following plot of the open circuit induced volt­age versus position. An angle of 0 means that the induced voltage in the triggered phase is at a maximum。

就是各相的导通时刻

越过山丘

电枢反应会使得气隙合成磁密相比于空载时的气隙磁密相位提前，即使得最佳换相角度提前了，如果不相应的改变三极管导通时刻，提前换相，则会产生转矩波动，并且电机的性能也会下降。你可以先查查电机的超前换相，