Power supply including zero-cross detection circuit, and image forming apparatus
US8761631B2 · kind B2 · utility
9Cited by
0References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Dec 14, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/217
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply includes a first capacitor, a resistor for discharging an electric charge of the first capacitor and for detecting zero crossing of the AC voltage input from the AC power supply, a second capacitor, and a frame ground o and a discharge resistor having a resistance value smaller than the resistor and configured to discharge an electric charge of the second capacitor, and switches between a state where a current to the discharge resistor is cut off and a state where a current flows through the discharge resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.