Battery charger control circuit and an uninterruptible power supply utilizing same
US6605879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Jun 1, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charging control circuit for severe battery conditions and an uninterruptible power supply (UPS) system including same are presented. The charging control circuit utilizes both hardware and microprocessor control to allow the UPS to start with depleted or no batteries installed. Initially, the hardware control loops regulate DC bus voltage generation to charge the batteries to a safe level to allow the UPS housekeeping circuitry to wake up and assume control of the UPS operation. Once the microprocessor has awoken, it assumes control of the DC bus and charging of the batteries. If no batteries are installed, the hardware control loop utilizes a fast responding voltage mode control to regulate the DC bus, while a microprocessor-based current mode control is used when batteries are installed. Hardware over voltage control and microprocessor shut off control is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.