Rectifier with PAM controller to force an input current to approximate a sine wave
US8102686B2 · kind B2 · utility
3Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2008 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Mar 18, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric power supply circuit includes a diode bridge circuit (12) for rectifying an alternating current, a switching element (S) for causing a short-circuit for output power of the diode bridge circuit (12), and a PAM control section (15) for causing the switching element (S) to perform switching with a predetermined timing so that a waveform of an input current approximates to a sine wave. The PAM control section (15) outputs ON/OFF pulses so that five pulses are output for each zero-cross point and one of the five pulses located in center extends over the zero-cross point at any time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.