Large air gap motor with rotor heat shield

Details Large air gap motor with rotor heat shield Large air gap motor with rotor heat shield

1989-04-14

1990-06-12

Wong, Peter S.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 45, 310156, H02K 104, H02K 5128

Patent

active

049335812

ABSTRACT:
A large air gap electric motor has a permanent magnet rotor with a large air gap to a slotless, less, cylindrical core surrounding the rotor. A winding of at least one phase is disposed in the large air gap. This winding is disposed on a coil form wihch is metallized on one face to reflect heat of the winding away from the rotor. The winding is formed from a plurality of pancake coils with a plurality of pancake coils around the periphery in each layer and a plurality of layers in a radial dimension. Each pancake coil in successive layers becomes progressively larger to substantially fill the radial air gap. The surrounding slotless core is made from a spirally wound flux conductor, which may be a flat ribbon of rectangular cross section.

REFERENCES:
patent: 4293785 (1981-10-01), Jackson, Jr.
patent: 4578610 (1986-03-01), Kliman et al.
patent: 4645961 (1987-02-01), Malsky
patent: 4679313 (1987-07-01), Shultz et al.
patent: 4792712 (1988-12-01), Stokes
patent: 4827170 (1989-05-01), Kawamura et al.
patent: 4843269 (1989-06-01), Shramo

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