Ferroresonant transformer power supply

Electricity: power supply or regulation systems – Remote sensing

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363 75, 363 91, G05F 132

Patent

active

041307909

ABSTRACT:
An electrical power supply for providing an electrical power signal of substantially constant voltage when the current level of the power signal is less than a predetermined value and for reducing the voltage of the power signal below said predetermined level when the power signal current level exceeds the predetermined value includes a ferroresonant transformer. A saturable reactor provides a current responsive impedance connected to the primary of the ferroresonant transformer for reducing the voltage supplied to the primary winding. The maximum current level in the secondary circuit of the ferroresonant transformer is adjusted by adjusting the effective impedance of the saturable reactor. A rectifier may be connected in the secondary circuit of the ferroresonant transformer to provide direct current electrical power signal. Three phase power may be used as a power supply input with six ferroresonant transformers having three primary windings connected in delta and three primary windings connected in wye electrical configuration.

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patent: 3112439 (1963-11-01), Rosin
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patent: 3440516 (1969-04-01), Kaiser
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patent: 3824449 (1974-07-01), Hase
patent: 3914685 (1975-10-01), Van Gilder
patent: 4004209 (1977-01-01), Lawson, Jr.

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