Excitation circuit for brushless synchronous welding generators

Details Excitation circuit for brushless synchronous welding generators Excitation circuit for brushless synchronous welding generators

1975-11-25

1977-06-21

Hickey, Robert J.

Electricity: single generator systems

Automatic control of generator or driving means

Current output

219133, 322 59, 322 72, H02P 910, H02P 938

Patent

active

040314553

ABSTRACT:
An excitation control circuit for a brushless synchronous welding generator, in which the stator-mounted excitation winding is fed from a separate voltage source via two parallel-connected power transistors with independently adjustable base circuits, one transistor controlling the excitation current in the idling mode, the other in the welding mode. A change-over switch, responding to an electromagnet in the welding current circuit, alternatingly energizes one transistor, while blocking the other.

REFERENCES:
patent: 3505587 (1970-04-01), Carroll et al.
patent: 3916292 (1975-10-01), Dirzhis et al.

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