PROCESS FOR MEASURING PHASE CURRENTS OF A DEVICE FOR CONTROLLING ELECTRIC MOTORS MADE WITH IMS TECHNOLOGY OR THE LIKE EMBEDDING, FOR SUCH MEASURE, RESISTANCE AND TEMPERATURE CONTROL DEVICE FOR POWER TRANSISTORS
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United States of America Patent
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Feb 5, 2008
Grant Date -
Jan 29, 2004
app pub date -
Jul 21, 2003
filing date -
Jul 26, 2002
priority date (Note) -
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Abstract
The invention is applied to the field of industrial controls for electric motors and more precisely refers to a process for measuring phase currents of an inverter or a DC controller consisting in detecting the temperature of a copper path made with IMS (Insulated Metal Substrate) technology and the like, used as shunt and that is the extension of a pre-existing adduction line towards a motor or towards the supply line or towards power devices, and in compensating through software the path drop in order to have an accurate measure of the current crossing it. A heat sensor is applied next to or over such copper path to detect its temperature. This latter one will also be assumed, with an acceptable degree of approximation, as the power transistors temperature.
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