Liebert Corporation

Bret P Fox

Peter A Panfil

Russell Edward Shetler, Jr

Paul Taylor

John S Fuchik

Liu Bo

Ricardo A Luquias

Xiao Xueli

Russell E Shelter, Jr

Zhou Dangsheng

A power supply includes a rectifier that converts an alternating current input voltage to a first direct current voltage. An inverter that converts the first direct current voltage to an alternating current output voltage. A first set of output terminals that receives the alternating current output voltage. A second set of output terminals that receives the first direct current voltage. A charging circuit that charges a backup power source based on the first direct current voltage. The rectifier receives a second direct current voltage from the backup power source based on the power supply operating in a predetermined condition.

AC and DC uninterruptible online power supplies

Methods and systems are disclosed for automatically tracking and controlling the capacity ratings of UPS units. The methods and systems provide a central server or repository for storing the capacity ratings, grant kVA and grant code authorized for each UPS unit along with a unique security key for each unit. When a customer purchases a capacity upgrade, the server updates the capacity rating for the customer's unit and issues an upgrade grant that includes the new rating and the grant code. The upgrade grant may thereafter be downloaded by a service technician and used to upgrade the unit. Alternatively, the upgrade grant may be downloaded directly to the UPS unit, and the unit's software and/or firmware may perform the upgrade automatically. In either case, the upgrade may be performed through a software modification, thus eliminating the need for the technician to physically swap out hardware. Such an arrangement helps ensure that only authorized capacity upgrades are performed.

Adaptive capacity power supply

Growing community of inventors

Sunbury, OH, United States of America

Bret P Fox