Inductive power controller

Details Inductive power controller Inductive power controller

1985-12-04

1987-09-22

Paschall, M. H.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Impedance insertion

361 11, 323249, 323262, H02H 908

Patent

active

046959173

ABSTRACT:
Power to a load is controlled by actuation of an inductive circuit from a first condition of low inductance to a second condition of higher inductance in response to a preselected overcurrent condition. In a first preferred embodiment, the inductive circuit comprises a pair of coils electrically connectible so that magnetic fields produced by current flow in the coils oppose each other in the first condition, reducing the magnetic flux and thus the effective inductance of the circuit. The magnetic fields are either neutral to each other or reinforce each other in the second condition, giving rise to a higher inductance. Alternatively, the inductive circuit may include one or more fixed value inductors interposed between a power supply and a load in response to an overcurrent condition.

REFERENCES:
patent: 2350195 (1944-05-01), Rypinski
patent: 3403323 (1968-09-01), Wanlass
patent: 3732485 (1973-05-01), Kettler
patent: 4163190 (1979-07-01), Moerman
patent: 4358808 (1982-11-01), Praeg

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