Power supply apparatus and image forming apparatus
US9823617B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2016 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Sep 16, 2036 |
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 includes a first line and a second line to each of which an AC voltage is input from an AC power supply; a conversion element configured to convert the AC voltage to be input to the first line or the second line into a current corresponding to the AC voltage; a voltage detection unit including a first current transformer, the first current transformer including a primary winding and a secondary winding, the voltage detection unit being configured to detect an AC voltage output from the secondary winding of the first current transformer through supply of the current converted by the conversion element to the primary winding; and a zero cross detection unit configured to detect a zero cross timing of the AC power supply based on the AC voltage detected by the voltage detection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.