Method and system for managing the temperature in a speed controller
US8379424B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2008 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Dec 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for managing the temperature implemented in a speed controller that includes several modules, each including a case containing a power semiconductor that provides a pulsed voltage to an electrical load, each module being characterized by a junction temperature, a heat sink, and a temperature sensor mounted on the heat sink. The method for a module includes estimating a case temperature based on a predetermined thermal model of the sink, a temperature measured by the sensor and average power losses that the module undergoes, the predetermined thermal model of the sink integrating the thermal transfer impedances representing the thermal influence of one module on another and vice versa; determining a junction-case temperature based on the case temperature of the module and a limiting value of the junction temperature; and limiting the junction-case temperature obtained to a predetermined limiting value of the junction-case temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.