초록 ▼

A secondary power supply with a battery charging circuit for use with a primary power supply having an AC power relay coupled to a AC power source and a DC/DC power converter is disclosed. The secondary power supply includes a battery bank having positive and negative terminals, wherein the negative

A secondary power supply with a battery charging circuit for use with a primary power supply having an AC power relay coupled to a AC power source and a DC/DC power converter is disclosed. The secondary power supply includes a battery bank having positive and negative terminals, wherein the negative terminal is coupled to a negative power rail of the primary power supply. An auxiliary switch in the AC power relay, having first and second contacts coupled to the positive terminal of the battery bank and a positive power rail of the primary power supply, respectively, is closed in response to a loss of the AC power source. A battery charger circuit, coupled to the auxiliary switch and the battery bank, utilizes a voltage output from the DC/DC power converter to regulate charging of the battery bank. The battery charger circuit, in one embodiment, includes a regulation circuit that senses a plurality of electrical characteristics of the battery bank and, in response thereto, generates a control signal. Next, a drive circuit, coupled to the regulation circuit, receives the control signal and, in response thereto, selectively couples the battery bank to a DC power rail of the power supply.

대표청구항 ▼

[ What is claimed is:] [15.] An uninterruptible power supply (UPS), comprising:a current limiting resistor coupled to an AC input power source;an AC power relay, coupled to said current limiting resistor, having a current limiting resistor bypass switch and an auxiliary switch with first and second

[ What is claimed is:] [15.] An uninterruptible power supply (UPS), comprising:a current limiting resistor coupled to an AC input power source;an AC power relay, coupled to said current limiting resistor, having a current limiting resistor bypass switch and an auxiliary switch with first and second contacts, wherein said auxiliary switch is closed in response to a loss of said AC input power source;a switching regulator;a bias regulator; anda secondary power supply, including:a battery bank having positive and negative terminals, wherein said positive terminal is coupled to said first contact of said auxiliary switch; anda battery charger circuit, coupled to said auxiliary switch and said battery bank, that utilizes a voltage output from said bias regulator to regulate charging of said battery bank.