Low inertial variable speed induction motor

Details Low inertial variable speed induction motor Low inertial variable speed induction motor

1982-02-19

1985-01-01

Miller, J. D.

Electrical generator or motor structure

Dynamoelectric

Rotary

188164, 310 93, 310266, H02K 712

Patent

active

044917538

ABSTRACT:
A motor has an electromagnetic brake which is connected to the output shaft to brake the rotation of the output shaft, whereby the driving body can be forcibly braked with excellent stopping response.
A fan for forcibly cooling the inside of the motor is enclosed in the casing, whereby temperature rises can be prevented by ventilation.
A bracket for supporting the iron core of the brake coil is made of a non-magnetic material, whereby the leaked magnetic flux passing through the bearing fixed on the bracket can be prevented, and consequent damage to the bearing heated by the eddy current can be prevented.
The stator can be a stator having windings used in a conventional induction motor, and the rotor is a cup type rotor having a simple structure extended in the axial direction. Accordingly, the structure is simple, and the size of the motor in the radial direction can be reduced.

REFERENCES:
patent: 2827855 (1958-03-01), Rankin
patent: 3090571 (1963-05-01), Lohest et al.
patent: 3221854 (1965-12-01), Jaeschke et al.
patent: 3251444 (1966-05-01), Erban
patent: 3316429 (1967-04-01), Jaeschke
patent: 3474273 (1969-10-01), Duurkoop
patent: 3493796 (1970-02-01), Siegel
patent: 3564311 (1971-02-01), Beyersdorf
patent: 3600616 (1971-08-01), Yokoyama
patent: 3736449 (1973-05-01), Honeywell et al.
patent: 3899061 (1975-08-01), Krug
patent: 4337406 (1982-06-01), Binder
W. G.: Der Elektromeister, 1963, H. 14, S. 958.

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