Flux contoured rotary electromagnetic machine

Details Flux contoured rotary electromagnetic machine Flux contoured rotary electromagnetic machine

1983-06-14

1985-08-27

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310181, H02K 2128

Patent

active

045380805

ABSTRACT:
A brushless DC tachometer including an alternator which produces a substantially trapezoidal output signal coupled to an FET transistor switching bridge. The trapezoidal output signal is achieved using a block permanent magnet for one pole and a consequent pole contoured to achieve a substantially uniform flux density for the winding over a distance sufficient to produce a trapezoidal output signal.

REFERENCES:
patent: 3064147 (1962-11-01), Porter et al.
patent: 3296471 (1967-01-01), Cochhardt
patent: 4088943 (1978-05-01), Schmidt
patent: 4091300 (1978-05-01), Lynch et al.
patent: 4296343 (1981-10-01), McMillen
patent: 4453097 (1984-06-01), Lordo

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