Direct-current micromotor

Details Direct-current micromotor Direct-current micromotor

1977-03-01

1979-01-23

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310266, 310154, H02K 1314

Patent

active

041362942

ABSTRACT:
A direct-current micromotor is disclosed which comprises a rotor bearing a motor winding, the rotor being arranged for rotation between a core part and a mantle part of a stator structure. The core part comprises a permanent magnet and the mantle part is made of magnetically conductive material. The motor winding is fed through a commutator comprising a collector and associated brushes. At least a part of the surfaces of the stator facing the rotor winding are provided with an electrically conductive coating to reduce the height of the voltage peaks occuring during the commutation.

REFERENCES:
patent: 2667591 (1954-01-01), Gindroz
patent: 3163788 (1964-12-01), Powers
patent: 3591815 (1971-07-01), Grootenhuis et al.

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