Stopping noise reduction circuit for start motor using resistor

Details Stopping noise reduction circuit for start motor using resistor Stopping noise reduction circuit for start motor using resistor

2006-10-24

2006-10-24

Masih, Karen (Department: 2837)

Electricity: motive power systems

Battery-fed motor systems

C361S152000, C335S181000

Reexamination Certificate

active

07126295

ABSTRACT:
A stopping noise reduction circuit for a start motor comprises a battery generating a power supply to drive the start motor, a key switch for controlling an on/off of the power supply, a solenoid having a permanent magnet, P and H coils, and a movement contact to drive the start motor, and further comprises a B1terminal grounded inside the solenoid, an M1terminal connected to an M terminal of the start motor, and a resistor coupled with the B1or M1terminal. In the stopping noise reduction circuit, upon an off condition of the key switch, the movement contact of the solenoid is connected to the B1and M1terminals such that more induced current than an induced current flowing into the P and H coils, in a current induced by a rotator of the start motor, flows to ground via the resistor within a short flow time.

REFERENCES:
patent: 3739309 (1973-06-01), Dalton
patent: 5915667 (1999-06-01), Kim et al.

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