Permanent magnet type brushless motor

Details Permanent magnet type brushless motor Permanent magnet type brushless motor

1994-10-24

1996-07-02

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, H02K 3714, H02K 3708

Patent

active

055325319

ABSTRACT:
A permanent magnet type brushless motor wherein the number of a stator magnetic poles is 3 m (where m is an integer not less than 2), Z pieces of N pole and Z pieces of S pole (where Z is m (3n.+-.1), and n is an integer not less than 2) are magnetized alternately with the same pitch, and an angle formed between a center of N pole of the permanent magnet corresponding to a pole tooth at the center of any one of the stator magnetic poles and a center of S pole of the permanent magnet corresponding to a pole tooth at the center of one of the stator magnetic poles adjacent to the any one of the stator magnetic poles is 360.degree. (n.+-.1/2)/Z.

REFERENCES:
patent: 3860843 (1975-01-01), Kawasaki et al.
patent: 4672253 (1987-06-01), Tajima et al.
patent: 5030864 (1991-07-01), Van Hout et al.
patent: 5289064 (1994-02-01), Sakamoto
patent: 5334894 (1994-08-01), Nakagawa et al.
patent: 5386161 (1995-01-01), Sakamoto
patent: 5418414 (1995-05-01), Ackermann et al.

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