Dynamoelectric machines

Details Dynamoelectric machines Dynamoelectric machines

1989-03-23

1993-06-15

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 52, 310 54, 310261, H02K 2112, H02K 919, H02K 122

Patent

active

052202330

ABSTRACT:
A high speed rotating electromagnetic motor/generator includes a rotor having a core of magnetic material, a layer of permanent magnet, a retainer ring and side walls of non-magnetic material. A stator is provided by magnetic steel laminations and winding slots. A case includes a cylindrical inner casing, a cylindrical outer casing and end caps which carry the machine bearings. The permanent magnets within the rotating part may be made of neodymium-boron-iron and produce a high flux density pole rotor. The motor/generator can be operated as a brushless direct current or synchronous alternating current machine. Efficient means of cooling is provided by helical channels, which carry a liquid coolant, and are formed in the casing.

REFERENCES:
patent: 3567975 (1971-03-01), Biesack
patent: 3735174 (1973-05-01), Bosch et al.
patent: 3858308 (1975-01-01), Peterson
patent: 3968390 (1976-07-01), Yasuda et al.
patent: 4433261 (1984-02-01), Nashiki et al.
patent: 4454438 (1984-06-01), Yamashita et al.
patent: 4517479 (1985-05-01), Aleem et al.
patent: 4674178 (1987-06-01), Patel

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