In the aspect of speed sample, HALL speed sensor is adopt, and combined the m method and t method, so the sample precision can be ensured both in the high speed moment and low speed moment.
本文在转速采样环节采用霍尔速度传感器作为电机速度采样器件，并且采用了M法和T法混合的方法进行测速，这样在低速和高速时都能保证采样精度。
As for method t, it is a nonsence, to tell you again, you can save as much time as possible to do more questions will have harvest, try to pick up points at the last moment.
至于方法估计也无用武之地了，在此还是说，能节省时间多做一题就有一道题的收获，尽量在最后关头多争取分数。
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