The experiment method on sensorless speed estimation in DC motor and three special cases of DC motor with different number of poles and different number of commutator bars were presented.
介绍了直流电动机无传感器测速的实验方法，并选取了三台不同结构的直流电动机进行实验。
2
The invention provides a reliable rotor commutator welding method, including the steps: the coil end heads of the upper coil and the lower coil are welded through the argon-arc welding;