Intrinsically safe power source with plural conversions

Details Intrinsically safe power source with plural conversions Intrinsically safe power source with plural conversions

1975-03-27

1977-05-17

Goldberg, Gerald

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

321 14, 361 18, 361 88, H02M 542

Patent

active

040244490

ABSTRACT:
Converter circuit, in which a 50 or 60 cps a.c. voltage is converted into a d.c. voltage, the latter into an a.c. voltage of a higher frequency, e.g. 20-80 kilocycles, which is converted by way of one transformer into one or several separate d.c. voltages. The transformer comprises a divisible ferrite core; the primary winding and one or several secondary windings are placed on opposite core parts. Each secondary winding, together with a pertaining rectifying-, smoothing- and stabilizing -circuit and a limiting resistor is installed as an intrinsically safe power source on one print. Several prints of this kind may be placed on the secondary core part, one for each power source required. The electrical values of the circuit components are subject to certain specifications.

REFERENCES:
patent: 3129398 (1964-04-01), Lheureux
patent: 3379954 (1968-04-01), Hehenkamp
patent: 3409805 (1968-11-01), Whipple et al.
patent: 3624449 (1971-11-01), Morgan

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