Induction motor

Details Induction motor Induction motor

1981-07-27

1983-10-11

Gonzales, John

Electrical generator or motor structure

Dynamoelectric

Rotary

310261, H02K 122, H02K 1700

Patent

active

044095066

ABSTRACT:
When an induction motor is speed-controlled with a variable frequency power supply including thyristor inverters, operating loss due to harmonics components is increased in a rotor of the induction motor. In order to diverge additional operating loss into an appreciable depth of the rotor to thereby suppress the increase in the operating loss, the rotor comprises a cylindrical member having a circumferential resistivity which is larger than axial and radial resistivities and circumferential permeability which is smaller than axial and radial permeabilities, and a core disposed in the cylindrical member and having an axial permeability which is smaller than circumferential and radial permeabilities.

REFERENCES:
patent: 2372590 (1945-03-01), Ljunggren et al.
patent: 2492678 (1949-12-01), Amtsberg
patent: 3068373 (1962-12-01), Bekey
patent: 4282451 (1981-08-01), Bratoljic
Dorairaj et al., Polyphase Induction Machine . . . Slipmeter, IEEE Transactions on Power App. & Sys. (vol. PAS-86, No. 7, Jul., 1967), pp. 835-843.

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