Rotational noise reduction structure in dc motor with rotor magn

Details Rotational noise reduction structure in dc motor with rotor magn Rotational noise reduction structure in dc motor with rotor magn

1987-10-06

1989-06-13

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 310156, H02K 524

Patent

active

048395463

ABSTRACT:
A method and apparatus for reducing the rotational noise in dc motors with rotor magnets, comprising forming the rotor magnet so that its magnetic center plane is aligned with the geometric center plane of the stator core, thereby providing for a distribution of the air gap magnetic flux density about the magnetic center plane in an asymmetric manner and reducing the rotational noise of the motor without the need to reduce the axial dimensions of the magnet.

REFERENCES:
patent: 3329845 (1967-07-01), Lear
patent: 4115715 (1978-09-01), Muller

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