Miniature motor

Details Miniature motor Miniature motor

1992-12-14

1994-03-22

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 40MM, H02K 1306

Patent

active

052967719

ABSTRACT:
A miniature motor including a housing formed into a bottomed hollow cylindrical shape, on the inner circumferential surface of which a permanent magnet is fixedly fitted; A rotor is provided having an armature, a spark-quenching element and a commutator. An end bracket is provided having brushes fitted to the open end of the housing and making sliding contact with the commutator. Input terminals are electrically connected to the brushes; The rotor is rotatably supported by bearings provided on the housing and the end bracket, in which the spark-quenching element is formed by a laminated ceramic capacitor formed into a ring shape, having on the outer surface thereof the same number of electrodes as the number of poles of the armature; The electrostatic capacity of the capacitor is more than 1 .mu.F.

REFERENCES:
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patent: 4644804 (1987-02-01), Ramm et al.
patent: 4769566 (1988-09-01), Matsuda
patent: 4833357 (1989-05-01), Tamura et al.
patent: 4888511 (1989-12-01), Aoki
patent: 5079468 (1992-01-01), Sata
Abstract JP55034872, vol. 004067, Matsushita Electric Works Ltd, May 20, 1980.
Abstract JP2246750, vol. 014568, Shibaura Eng Works Co Ltd, Dec. 18, 1990.
Machine Design, vol. 62, Feb. 22, 1990, pp. 69-72 "Built-in Arc Suppressors Boost Cup-Motor Life".
Abstract JP52051504, vol. 001119, Matsushita Electric Works Ltd, Oct. 11, 1977.
Abstract JP3270662, vol. 016088, Hitachi Ltd, Mar. 4, 1992.
Abstract JP3143253, vol. 015365, Matsushita Electric Works Ltd, Sep. 13, 1991.
Built-in Arc Suppressors Boost Machine Design Cup-Motor Life, Feb. 22, 1990, No. 4, Cleveland, Ohio, US.

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