Permanent magnet rotor and brushless motor

Details Permanent magnet rotor and brushless motor Permanent magnet rotor and brushless motor

2005-09-06

2005-09-06

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S261100, C310S156010, C310S156490

Reexamination Certificate

active

06940199

ABSTRACT:
In a rotor20including a plurality of permanent magnet pieces60fixed in a plurality of magnet insertion slots43provided on the outer periphery of a rotor yoke40, respectively, and the rotor yoke40having concaves44each provided between the permanent magnet pieces60adjacent to each other and protrusions46each provided in each the concaves44to protrude outwardly in the radial direction of the rotor yoke40, between the sandwiching angle α formed by two sides connecting both outer ends A and A′ of each the concaves44to the center axis O of the rotor yoke 40 and the sandwiching angle β formed by two sides connecting both outer ends B and B′ of each the protrusions46to the center axis O of the rotor yoke40, the following relationship is satisfied:in-line-formulae description="In-line Formulae" end="lead"?0.3<β/α<0.5.in-line-formulae description="In-line Formulae" end="tail"?

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