Current sensing circuit disconnect device and method

Abstract

A device and method are provided for saving power and electricity in a charging device including external power supplies and battery chargers having a primary circuit and a secondary circuit where a switch is located in the primary circuit and a current sensing device in the secondary circuit to sense when there is a drop in current in the secondary circuit or no current in the secondary circuit because the load such as a cell phone or tablet is charged and when this occurs the switch in the primary circuit is opened and the primary circuit no longer draws power from the source of power until the switch in the primary circuit is closed by either a user activating a switch to reenergize the charging device, where the switch may be powered by an on-board battery to close the primary circuit, or where a control circuit is activated by a program in the load or device to be charged, such that the charging device will cycle on and off according to an external app program residing on the device to be charged or some other device not attached to the controller.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of co-pending U.S. patent application Ser. No. 16 / 102,303, filed Aug. 13, 2018, which was a continuation-in-part application of U.S. patent application Ser. No. 14 / 329,787, filed Jul. 11, 2014, now U.S. Pat. No. 10,050,459, dated Aug. 14, 2018 entitled Current Sensing Circuit Disconnect Device and Method, which claims the benefit of Provisional Application Ser. No. 61 / 845,179, filed Jul. 11, 2013 and which was a continuation-in-part application of U.S. patent application Ser. No. 13 / 908,217, filed Jun. 3, 2013, now U.S. Pat. No. 9,627,903, dated Apr. 18, 2017, which claims the benefit of Provisional Application Ser. No. 61 / 825,164, filed May 20, 2013 and which is a continuation-in-part application of U.S. patent application Ser. No. 13 / 892,509, filed May 13, 2013, now U.S. Pat. No. 9,035,604, dated May 19, 2015, which was a continuation-in-part application of U.S. patent application Ser. No. ...

AI Technical Summary

Benefits of technology

The present invention provides a battery charging device with a snubber circuit to protect the triac from spurious triggering and improve its reliability against fast voltage transients. The snubber circuit consists of a resistor capacitor series pair connected in parallel with the triac that prevents spurious triggers and over voltage at turn off. Additionally, the invention includes a manual switch to disconnect the charging device from the mains when in a standby or idle mode of operation. The technical effects of the invention provide improved reliability of the battery charging device and prevention of spurious triggers and over voltage.

Problems solved by technology

This can be caused by electrical noise or other transient voltages from the mains.

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