Patent ID: 7126295

Claim:
A stopping noise reduction circuit for a start motor comprising a battery for providing power to drive the start motor, a key switch for controlling an on/off state of the power supply from the battery, and a solenoid having a permanent magnet, P and H coils, and a movement contact to drive the start motor, the circuit comprising: a B 1 terminal grounded inside the solenoid; an M 1 terminal connected to an M terminal of the start motor; and a resistor coupled with the B 1 or M 1 terminal, wherein, upon a turning off of the key switch, the movement contact of the solenoid is connected to the B 1 and M 1 terminals such that more induced current than an induced current flowing into the P and H coils inside the solenoid, in a current induced by a rotator of the start motor, is conducted to ground via the resistor within a short time, wherein a value of the resistor is less than a resistor value of a serial circuit of the P and H coils inside the solenoid.