Battery charger failure alarm circuit

Details Battery charger failure alarm circuit Battery charger failure alarm circuit

H - Electricity

02

J

320/12

H02J 7/10 (2006.01) H02J 7/02 (2006.01)

Patent

CA 1205520

ABSTRACT OF THE DISCLOSURE A battery charger failure alarm circuit for use with a battery charger including a source of rectified AC voltage for charging a battery and a filtering inductor serially in- terposed between said charger circuit and battery and across which there appears AC ripple voltage so long as the battery charger is functioning properly, includes a sensing circuit coupled to the filtering inductor for sensing the presence of the AC ripple voltage and an alarm circuit coupled to the sensing circuit operable to indicate the failure of the bat- tery charger circuit in response to a lack of sensed AC ripple voltage. A time delay circuit may be included in the battery charger failure alarm circuit between the sensing circuit and alarm circuit to delay the operation of the alarm circuit in the case of momentary loss of the AC ripple voltage.

433932

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