Direct current brushless motor

Details Direct current brushless motor Direct current brushless motor

1992-02-24

1993-01-12

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310268, 318254, 318480, H02K 1100, H02K 2112, H02K 122, H02P 706

Patent

active

051793075

ABSTRACT:
The variable speed, reversible, brushless, direct current motor comprises a rotor, electromagnets a switching transistor module and electronic controller module. The rotor is mounted on a shaft with bearings at each end, with a plurality of permanent magnets symmetrically placed thereon in an alternating field pattern. Each electromagnet invokes a magnetic field at two permanent magnet positions to cause rotation of the rotor. The switching transistor module receives power from two power sources to conduct current and energize the electromagnets. The electronic control module supplies alternating voltage to points on the transistor module. The switching waveform is triggered by infra-red pick-ups mounted next to the rotor. In operation, each time an electromagnet is switched in polarity, the rotor rotates thirty-six degrees until the permanent magnets are aligned with the electromagnet. Each time the polarity is switched, the permanent magnet that is aligned is repelled, while the permanent magnet approaching is attracted. The infra-red pick-ups switch at such a time to continue the rotation.

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