Axial flow fan motor

Details Axial flow fan motor Axial flow fan motor

1996-12-30

1999-07-20

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 71, 310 68C, 310216, H02K 2900, H02K 1100

Patent

active

059259485

ABSTRACT:
To reduce the number of parts composing a control circuit and to reduce an area occupied by a printed circuit board on which the parts are to be mounted, in an axial flow fan motor in which a shaft is rotatably mounted by bearings and an impeller is mounted on the shaft, the control circuit is in the form of an arcuate shape having an area corresponding to 30% to 60% of an total area of the boss portion and is installed into a printed circuit board having a diameter smaller than that of the boss portion. Also, by utilizing the functions installed into the integrated circuit of the control circuit, the parts provided on the circuit board may be dispensed with. As a result, a space which corresponds to that of the printed circuit board is generated in an interior of a casing to thereby enhance the cooling performance and to reduce the number of the parts and the manufacture steps.

REFERENCES:
patent: 4554491 (1985-11-01), Plunkett
patent: 4633110 (1986-12-01), Genco et al.
patent: 4656553 (1987-04-01), Brown
patent: 4730136 (1988-03-01), Mueller
patent: 4804873 (1989-02-01), Shiraki et al.
patent: 5008573 (1991-04-01), Beppu et al.
patent: 5256922 (1993-10-01), Tanaka et al.
patent: 5436519 (1995-07-01), Takahashi et al.

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