Thyristor controlled power source for gradually decreasing loads

Details Thyristor controlled power source for gradually decreasing loads Thyristor controlled power source for gradually decreasing loads

1985-04-15

1986-10-14

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219483, 219486, 219508, 323268, 323272, H05B 102

Patent

active

046174532

ABSTRACT:
A heating power source device includes a pair of loads connected to a secondary side of a power source transformer by way of four thyristor units. Each of the thyristor units includes pair of thyristors connected in anti-parallel relationship to each other and is controlled so as to connect the loads in parallel relationship to each other at the beginning of energization and then to connect the loads in serial relationship to each other after the resistance of the loads has been reduced below a predetermined level.

REFERENCES:
patent: 2363326 (1944-11-01), Hodgkins
patent: 3668367 (1972-06-01), Williams

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