Excessive load capacitor detection circuit for UPS
US6630751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2001 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Feb 1, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention are directed to an uninterruptible power supply for providing AC power to a load having a capacitive element. In embodiments of the present invention the uninterruptible power supply includes an input to receive AC power from an AC power source, an output that provides AC power, a DC voltage source that provides DC power, the DC voltage source having an energy storage device, an inverter operatively coupled to the DC voltage source to receive DC power and to provide AC power, the inverter including: first and second output nodes to provide AC power to the load having the first capacitive element, first and second input nodes to receive DC power from the DC voltage source, a circuit operatively coupled to the first output node of the inverter, the circuit being configured to compare a value representative of load capacitance of the first capacitive element with a reference value to determine excessive load capacitance, a set of switches operatively coupled between the first and second output nodes and the first and second input nodes and controlled to generate AC power from the DC power, and a transfer switch constructed and arranged to select on…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.