Who can help me explain the action of the four wires that connect the motor coil in the figure below?
The yellow wire and white wire are connected to the motor carbon brush, and the black line and gray line are borrowed from the motor winding.
The electric drill for the control of CIS, reverse and electronic speed control, because the switch and control accompanying CIS, reversal and electronic speed combination as a whole, the 4 sides are wiring holes, the text is difficult to say clearly, simply say, 4 lines are connected to the upper reversing switch in 4 holes to achieve control of the rotor clockwise and reverse.