Permanent magnet synchronous motor and compressor using the...

Details Permanent magnet synchronous motor and compressor using the... Permanent magnet synchronous motor and compressor using the...

2006-12-28

2008-11-18

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156450

Reexamination Certificate

active

07453181

ABSTRACT:
A permanent magnet synchronous motor includes a rotor having cage windings and permanent magnets placed on an inner peripheral side of these cage winding bars, where the permanent magnets are placed and polarized so that a ratio θ/α between a circumferential pitch angle θ of magnetic flux distribution of the permanent magnets and a magnet pole pitch angle α is between 0.67 and 0.91.

REFERENCES:
patent: 4629920 (1986-12-01), Hermann
patent: 6525442 (2003-02-01), Koharagi et al.
patent: 2002-369422 (2002-12-01), None
patent: 2005-117771 (2005-04-01), None

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