Method and apparatus for pulse-width modulation of a variable-frequency drive
US10951149B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jun 27, 2014 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Nov 7, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53876
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention disclose a method and apparatus for pulse-width modulation (PWM) of a variable-frequency drive (VFD), the method comprising: for each sector of a space vector graph for PWM of the VFD, identifying at least two possible clamping phases in switching between the vectors in the sector; comparing currents in multiple phases in at least one PWM cycle; in the sector of the space vector graph corresponding to the PWM cycle, determining the possible clamping phase with the maximum current in the at least two possible clamping phases; and clamping the determined possible clamping phase with the maximum current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.