Power supply apparatus and image forming apparatus
US10547244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2019 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | Jun 17, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The power supply apparatus having two switching elements connected to a primary winding of a transformer includes an adjustment unit for adjusting a voltage and supplying the voltage to a control unit. This voltage results from application of a voltage induced in an auxiliary winding while current is flowing in a predetermined direction with respect to the auxiliary winding as a result of the first switching element turned on and the second switching element turned off, and a voltage induced in the auxiliary winding while current is flowing in the direction opposite to the predetermined direction with respect to the auxiliary winding as a result of the first switching element turned off and the second switching element turned on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.