Motor

Details Motor Motor

2005-02-22

2005-02-22

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156530, C310S156550, C310S216006, C310S261100

Reexamination Certificate

active

06858961

ABSTRACT:
A motor comprising: a rotor including a permanent magnet type rotor unit having a plurality of permanent magnets and a reluctance type rotor unit having a plurality of magnetic salient pole portions and a plurality of slits for preventing flux leakage, the rotor units being coupled to each other in an axial direction; and a stator for generating a field for driving the rotor. Elongated holes for preventing the short-circuit of magnetic fluxes are arranged near edges of the permanent magnet of the permanent magnet type rotor unit. The elongated holes or notches are arranged within a range defined so that 0.95α≦θ≦1.05α with α={(360/S)−R}/2 (degrees), where θ is an angle formed between a magnetic pole boundary and a center of the elongated hole or the notch in a forward direction of rotation of the rotor with respect to a center of a rotating shaft, R is an angle formed by a tooth width of the stator with respect to the center of the rotating shaft, P is the number of rotor poles, and the number of stator slots is S=3P/2.

REFERENCES:
patent: 6008559 (1999-12-01), Asano et al.
patent: 6218753 (2001-04-01), Asano et al.
patent: 0923186 (1999-06-01), None
patent: 07059310 (1995-03-01), None
patent: 09294362 (1997-11-01), None
patent: 00050584 (2000-02-01), None
English Language Abstract for JP Appln. No. 09-294362.
English Language Abstract for JP Appln. No. 07-059310.
English Language Abstract for JP Appln. No. 2000-050584.

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