Ripple detecting polarity indicator for battery charger
A battery charger output cable is described connected with an energized charger, the terminal of the cable embodying circuitry responsive to an AC ripple component in the battery charger output, the circuitry comprised of the following: during an interval of increasing voltage of the ripple component in a battery charger output; a first capacitor responsive to an AC ripple component passing current to the base-emitter junction of a transmitter; a second capacitor discharging current from the base-emitter junction; a correct polarity indicator; the second capacitor diverting current which would otherwise pass through and energize the correct polarity indicator; an incorrect polarity indicator in circuit with the second capacitor being reversely biased relative to the current passing from the second capacitor; during an interval of decreasing voltage of the ripple component in the battery charger output; the first capacitor reversing the direction of the current discharging the same through a second circuit including the second capacitor; the second capacitor having such a greater magnitude of capacitance value than the first capacitor as to pass insufficient voltage to energize the correct polarity indicator and the incorrect polarity indicator being biased relative to the reverse direction of current is energized.
- Assignee:
- NOV-87-068062; EDB-87-131863
- Patent Number(s):
- US 5654575
- OSTI ID:
- 6433238
- Resource Relation:
- Patent File Date: Filed date 18 Feb 1986
- Country of Publication:
- United States
- Language:
- English
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BATTERY CHARGERS
CAPACITORS
ELECTRIC BATTERIES
BATTERY CHARGING
ALTERNATING CURRENT
ELECTRIC CABLES
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRONIC CIRCUITS
JUNCTIONS
CABLES
CONDUCTOR DEVICES
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
EQUIPMENT
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries