Method for closed-loop control of a DC-DC voltage converter comprising a plurality of interlaced cells operating in zero-voltage switching mode
US8680825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2011 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Apr 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1586
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-DC voltage converter operating in zero-voltage switching mode with a switching threshold includes a plurality of interlaced cells, each cell having at least two controlled switches that are configured to be alternately closed and open, and each cell having an inductor in which an output current from the cell flows. The converter also includes a clock with a given switching period configured for triggering the switching of the switches between upper and lower control thresholds. A method for closed-loop control of the converter includes measuring, for each cell, an overrun period, determining a correction time corresponding to a minimum overrun period measured for the plurality of cells during an interlacing cycle, calculating an optimized switching period for the clock, and applying the optimized switching period to the clock to provide closed-loop control of the interlacing of the output currents from the plurality of cells of the converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.