Miniature motor

Details Miniature motor Miniature motor

1998-03-05

1999-11-09

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310269, 310261, 310264, 310216, 310193, H02K 524

Patent

active

059820551

ABSTRACT:
A miniature motor with a two-pole stator, and a rotor having three or more salient poles each having a core with flanges extending toward both sides thereof and a winding. The rotor is adapted to simulate a two-pole construction by cutting off at least the tip of a flange on either side on a part or all the salient rotor pole cores, thereby limiting the spontaneous-stop angular positions of the rotor to two. One insulating spacer is provided between a plurality of commutator segments of the commutator in such a positional relationship as to come in contact with one of the two brushes when the rotor is at a spontaneous-stop angular position. The motor is prevented from burning and restarting suddenly after a stop since the motor has a self-inactivating function by interrupting current supply at spontaneous-stop angular positions while maintaining motor torque by minimizing the angle of non-conduction to the rotor.

REFERENCES:
patent: 3617785 (1971-11-01), Kristiansen
patent: 3777367 (1973-12-01), Kalagidis
patent: 3864821 (1975-02-01), Ito et al.
patent: 4197477 (1980-04-01), Reynolds
patent: 4583015 (1986-04-01), Toshimitsu
patent: 4616151 (1986-10-01), Pryijmak
patent: 5327035 (1994-07-01), Sunaga

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