US 2016/0111914 A1Published application

Multi-voltage extended operation dc power supply system

OwnerHugh C. Willard, Michael R. Willardinventors

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Abstract

A multi-voltage direct current uninterruptable power supply (DC-UPS) system is described, which is configured to receive electrical energy from any of a plurality of sources external to the system, process such energy into a particular format, store the formatted energy, and convert the stored energy into multiple, adjustable, simultaneous, continuous direct current and desired voltage streams. The DC UPS system is configured to combine particular streams to implement load sharing, and to deliver these current streams to a plurality of external devices by a plurality of interconnections. In various implementations, the system may be configured to monitor and report state of charge (SOC) levels, processor activity, and other operational variables. In embodiments, the system may be configured with a single main board capable of routing the various voltage and current streams with substantial configuration flexibility, and of providing synthesized regulated voltages in a highly efficient manner.

A multi-voltage direct current uninterruptable power supply, comprising:

an input power conditioner assembly comprising an AC-to-DC converter adapted to receive power continuously from an AC power source and responsively generate a DC output;
a rechargeable battery arranged to receive the DC output of the input power conditioning assembly, and to provide continuous output power;
a power management assembly comprising:
a power management circuit arranged to receive output power from the rechargeable battery, the power management circuit comprising a line fuse, a field effect transistor switch, and a DC input power rail, arranged so that when the field effect transistor switch is actuated, power is delivered continuously from the rechargeable battery through the line fuse and field effect transistor switch of the power management circuit to the DC input power rail at a rate correlative to aggregate load on the rail, the power management circuit further comprising a boost regulator coupled with the field effect transistor switch, with a current-limiting resistor therebetween;
a power-on switch actuatable to generate an initiating output signal for transmission in the power management circuit to the boost regulator, with the boost regulator being responsive to the initiating output signal to transmit a positive bias voltage in the power management circuit through the current-limiting resistor to the field effect transistor switch so that the field effect transistor switch is actuated to enable power delivery from the rechargeable battery through the line fuse to the DC input power rail, and to provide a latch for the positive bias voltage to the field effect transistor switch;
and
a momentary switch actuatable to ground the positive bias voltage and thereby deactuate the field effect transistor switch and terminate power delivery from the rechargeable battery through the line fuse to the DC input power rail.

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Abstract

Claims42