Permanent magnet wiper motor structure and working principle

    The structure of permanent magnet wiper motor: electric drive (also called rotor), magnet (stator), electric brush, vortex bar, turbine, automatic return device (copper ring and contact).

Wiper motor processing and manufacturing

      Variable speed principle of permanent magnet wiper motor:

      When the permanent magnet motor is working, the back electromotive force is generated in the armature (rotor) at the same time, and its direction is opposite to that of the armature current. To make the motor rotate, the applied voltage must overcome the back electromotive force. When the motor speed increases, the back electromotive force increases, and only when the applied voltage is equal to the back electromotive force, the armature speed can be stabilized.

Teach you a coup to make your car wiper a new look

     When the switch is in the L position (low speed), the current flows in through the brush B1 and the B3 flows out. At this time, the effective number of windings that the current passes through is 4+4. The motor works at low speed, and when the switch is in the H position (high speed), the current passes through effectively The number of windings is 3+3, and the motor works at high speed.

Original title: [Working principle of high and low speed of car wiper motor] Source: [Electrician's Home]