Large air gap motor

Details Large air gap motor Large air gap motor

1987-10-01

1989-06-27

Wong, Peter S.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 86, 310254, 310104, H02K 5128, H02K 2114

Patent

active

048432695

ABSTRACT:
A large air gap electric motor has a permanent magnet rotor with a large air gap to a slotless, 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 which is metallized on one face to reflect heat of the winding away from the rotor. The winding is formed of pancake coils, with a plurality of pancake coils around the periphery in each layer and a plurality of layers in the radial dimension. Each pancake coil in successive outer 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.

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