Power supply device and image forming apparatus including power supply device
US9851680B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2016 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Jun 15, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply device includes first and second transformers, a first power source configured to output a first DC voltage from the first transformer, a second power source configured to output a second DC voltage from the second transformer, a first winding on a primary side of the first transformer, an auxiliary winding which is wound in the same winding direction as the first winding, and a voltage generator configured to be connected to the auxiliary winding and to generate a power supply voltage for driving a first controller of the first power source and a second controller of the second power source. When an AC voltage drops, control is performed such that the second controller stops prior to the first controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.