Why is the brushless motor 8 Does his three and big wires have positive and negative points? 

(1) His three and big wires are not divided into positive and negative, because when the handle is twisted, the output voltage passes through the three large wires outside the Hall wire of the motor. It keeps going back and forth and can't find the right time. Maybe it will be on the blue line for a while, maybe it will be on the yellow line for a while, maybe it will be on the green line for a while, and then the question raised by the customer <Why does the brushless motor make a lot of noise when it starts up? >You can go and explain to him that this is called motor banging