Redundant multiphase power supplies for common load device
US6317346A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Nov 9, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method for using at least two multiphase AC power sources to provide seamless uninterruptible power to a common load by isolating a faulty phase or source upon detection of a fault in one of the sources or in one of the phases thereof. To combine at least two three-phase power sources in parallel, for example, the apparatus includes a power paralleling circuit comprising two three-phase silicon controlled rectifier (SCR) bridges and a controller. Each bridge receives power from one of two separate and/or independent three-phase power sources. The controller monitors the status or condition of respective phases of power and selectively gates an associated SCR in each bridge so as to simultaneously power the common load from the two sources. Isolation switches are located in series with each phase circuit of each power supply. In the event of a fault, e.g., a loss of phase synchronization between corresponding phases of the respective power sources, an over-voltage condition of a phase, an under-voltage condition of a phase, etc., the controller issues gating signals to the appropriate SCR(s) or isolation switch(es) to isolate the defective phase(s) or power source…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.