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Current Shunt Resistors integrated in IGBT Power Modules for Medium Power Drive Application

Current sensors are required to measure an electric current in an output phase of an IGBT inverter. Depending on the IGBT inverter output power, several solutions are well known today. Shunt resistors, placed on the printed circuit board (PCB) in an inverter design, are popular due to the low system cost and exact current measurement. Due to the losses in the current shunt resistors during operation this solution is limed. Therefore other solutions have to be used for higher power. With a technology that allows placement of current shunt resistors on the base plate in an IGBT module these shunt resistors are as close as possible to the heat sink. In the range up to 35kW shunt resistors may be used for current measurement. A different and in fact exciting solution is to use the advantage of current shunt measurement in a higher power range were current transducers are utilized today.

• 528.73 KB
• 2014/02/07