Parallel-operating power supply system
US9013159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2013 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Sep 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/23
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Each of master and slave switching power supply apparatuses (2m, 2s) has an IGBT (10m or 10s) switching-controlled by a PWM pulse signal produced, based on a clock signal, by a switching device driving PWM pulse output section (28m or 28s), to thereby provide DC power in parallel to a load (5). The clock signal produced in the master switching power supply apparatus (2m) is coupled to the slave switching power supply apparatus (2s) through a photocoupler (36m) in the master switching power supply apparatus (2m) and a photocoupler (38s) of the slave switching power supply apparatus (2s). Also, the clock signal developed at the output of the photocoupler (36m) is coupled through a photocoupler (38m) to the master switching power supply apparatus (2m). The photocouplers (36m, 38m, 38s) have the same delay characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.