High-frequency motor

Details High-frequency motor High-frequency motor

1995-05-17

1997-03-11

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310125, H02K 1716

Patent

active

056104650

ABSTRACT:
A high-frequency motor comprises a squirrel-cage rotor. The rotor comprises an iron core having a plurality of circular slots, a plurality of conductive rods inserted into the slots, and short-circuit rings disposed at both ends of the conductive rods. The conductive rods are made of copper. A ratio of a product of the number N2 of the conductive rods and a diameter d2 of each conductive rod to an outer diameter D of the rotor is in an optimized range of 1.1 to 1.5, namely, 1.1.ltoreq.N2.multidot.d2/D.ltoreq.1.5. With this optimization, it becomes possible to achieve a maximum rotational speed of more than 120,000 min.sup.-1 and obtain an excellent motor efficiency.

REFERENCES:
patent: 3629632 (1971-12-01), Loupe
patent: 3965380 (1976-06-01), Stepina
patent: 4393344 (1983-07-01), Whellams
patent: 4577128 (1986-03-01), Gould et al.
patent: 4713567 (1987-12-01), Fey et al.
patent: 4720647 (1988-01-01), Plumer
patent: 4885494 (1989-12-01), Higashi
patent: 4910423 (1990-03-01), Werber

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