Pulse width modulation method, pulse width modulator and power converter
US6657412B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53871
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In detecting an output current of a power converter based on a DC current Idc of the power converter, the pulse width of the DC current Idc becomes narrower when the pulse width of a line voltage is narrower, and its detection becomes difficult. A voltage command correction unit 9 according to the present invention corrects voltage commands such that pulse width of a line voltage becomes zero when the pulse width of the line voltage is less than the minimum pulse width, not to output a line pulse, and an error generated by the correction is integrated. This integrated error is added to the line voltage in the next time, and the integrated pulse width of the line voltage is outputted when the pulse width becomes larger than or equal to the minimum pulse width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.