Capstan motor

Details Capstan motor Capstan motor

1996-04-10

1998-02-24

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68B, 310 68R, 310166, 310258, 310268, 360 9904, 360 9912, H02K 710

Patent

active

057214603

ABSTRACT:
In a capstan motor, a gear portion and an FG detection portion are integrally formed of a plastic magnet at mutually different wall thicknesses and they are fixed to the outer circumference of a rotor yoke. The FG detection portion is provided with multipolar magnetization to generate a rotation detection signal with a magnetoresistance element. The gear portion is arranged to transmit the drive force to the outside. The outer diameter of the rotor yoke is different at the gear portion and at the FG detection portion, depending upon the wall thicknesses of the plastic magnet. The outer diameter is set to be greater in the portion corresponding to the FG magnet of the rotor yoke.

REFERENCES:
patent: 4801830 (1989-01-01), Ogino et al.
patent: 4902924 (1990-02-01), Ushiro et al.
patent: 5101131 (1992-03-01), Ushiro et al.

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