Methods and power conversion system control apparatus to control IGBT junction temperature at low speed
US9236828B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2014 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Jul 24, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods, apparatus and computer readable mediums are presented for controlling a multiphase inverter in which third harmonic injection pulse width modulation (THIPWM) is used for generating inverter switching control signals at or above a non-zero threshold inverter output frequency, and high frequency injection discontinuous pulse width modulation (HFIDPWM) is used for inverter output frequencies below the threshold, where the threshold frequency corresponds to a threshold period less than or equal to the thermal impedance time constant of the inverter switching devices, and the injected high frequency component for HFIDPWM corresponds to a common mode period less than the thermal impedance time constant to mitigate thermal stress on the inverter switches and low speed inverter output derating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.