Permanent magnet field motor with radio frequency interference s

Details Permanent magnet field motor with radio frequency interference s Permanent magnet field motor with radio frequency interference s

1980-07-14

1982-04-06

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310220, 310154, H02K 1100

Patent

active

043238041

ABSTRACT:
The permanent magnet fields encircling the armature of a direct current motor are encircled by a pair of radially spaced cylindrical metal members separated by a cylindrical dielectric member. One of the metal members and one of the brushes that engages the commutator of the motor are grounded. The other brush and the other cylindrical metal member are connected to a direct current power supply, whereby a capacitor is formed by the three cylindrical members for suppressing radio frequency noise generated by sparking of the brushes at the commutator.

REFERENCES:
patent: 2032129 (1936-02-01), Jackson et al.
patent: 2048096 (1936-07-01), Bisley
patent: 2088949 (1937-08-01), Fekete
patent: 2114102 (1938-04-01), Collins
patent: 3090877 (1963-05-01), Baumhart
patent: 3373301 (1968-03-01), Black
patent: 4136294 (1979-01-01), Aubert et al.
patent: 4211944 (1980-09-01), Haller

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