Induction motor

Details Induction motor Induction motor

1976-08-24

1978-08-29

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310125, 310 57, 310 59, 417368, H02K 919

Patent

active

041106431

ABSTRACT:
Variable-speed electric induction motors are known with a closed fluid-flow circuit for coolant liquid driven by a pump operated by the motor. A disadvantage is that the coolant flow varies with speed of the motor. The improvement is that the motor has an ancillary shaft which drives the coolant pump and which is rotated at constant speed irrespective of the speed of the main drive rotor of the motor. The ancillary shaft may be driven by an ancillary rotor cooperating with the main stator of the motor. There may also be provided a coolant fan driven at constant speed, for example by the ancillary shaft and preferably through a releasable clutch.

REFERENCES:
patent: 953219 (1910-03-01), Muller
patent: 2657322 (1953-10-01), Holst
patent: 2844101 (1958-07-01), Burns et al.
patent: 2922098 (1960-01-01), Hutson
patent: 3456141 (1969-07-01), Burgess
patent: 3749949 (1973-07-01), Muller

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