Method and apparatus for cooling one or more power devices
US11791713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2021 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Dec 22, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/2089
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Described herein is a method of cooling a plurality of power devices, where the power devices are arranged as a plurality of switches used to generate a three-phase output AC voltage. Based on power device stress data, one or more switches (associated with one or more phase output AC voltages) may be identified as requiring more cooling than other of the switches. The switches are controlled to apply a common mode component voltage to each of the three phases for at least a portion of one or more output AC voltage segments. The common mode component voltage has a maximum amplitude that is sufficient to clamp the phase AC output voltage of the identified phase(s) to the positive supply rail voltage and/or negative rail supply voltage when the respective phase AC voltage is approaching respectively the positive supply rail voltage or negative supply rail voltage to cool the identified switch(es).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.