Charging circuit with SCR's triggered by pedestal and cosine mod

Details Charging circuit with SCR's triggered by pedestal and cosine mod Charging circuit with SCR's triggered by pedestal and cosine mod

1976-02-23

1977-06-21

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 39, 320DIG2, 323 22SC, H02J 710

Patent

active

040314510

ABSTRACT:
A battery charging circuit gates charging current through a silicon controlled rectifier triggered by a pedestal and cosine modified ramp unijunction circuit. A battery potential sensing circuit limits the initial surge current delivered to a fully discharged battery and provides short circuit protection, a second battery potential sensing circuit limits the current delivered to a fully charged battery to a level required to maintain the float potential, and a charging current sensing circuit limits the average value of current delivered to the battery to a desired level during low battery impedance and/or high line conditions, all by controlling the pedestal level.

REFERENCES:
patent: 3382425 (1968-05-01), Legatti
patent: 3504269 (1970-03-01), Hallahan, Jr.
patent: 3586955 (1971-06-01), Kisiel
patent: 3766463 (1973-10-01), Ruben

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