Brushless DC motor with cogging reduction

Details Brushless DC motor with cogging reduction Brushless DC motor with cogging reduction

1987-06-22

1988-09-06

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310162, H02K 3714, H02K 2114

Patent

active

047695676

ABSTRACT:
A brushless direct current electric motor includes a stator having plural stator teeth at prescribed tooth pitches, exciter coils on the stator, a rotor mounted for rotation in an opening of the stator and plural magnetic poles formed on the peripheral surface of the rotor. According to the invention, the magnetic pole pitch between any given adjacent ones of the magnetic poles is different from the magnetic pole pitches between adjacent ones of said magnetic poles neighboring both sides of the firstly-mentioned adjacent ones of the magnetic poles.

REFERENCES:
patent: 3604961 (1971-09-01), Saldinger
patent: 4424463 (1984-01-01), Musil
patent: 4629924 (1986-12-01), Grosjean
patent: 4692646 (1987-09-01), Gotou

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