Integrated shunt resistors reduce system costs

20th February 2018

Lanna Deamer

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Infineon Technologies takes the EconoDUAL 3 modules to the next level of integration. They are now available with integrated shunt resistors for current monitoring in the AC path. Implementing these devices helps inverter manufacturers to reduce cost, improve performance and simplify the inverter designs.

The EconoDUAL 3 with integrated shunts can be used in a wide variety of applications, such as general purpose motor drives, uninterruptable power supplies, and solar. It is also well suited fit for agricultural and commercial vehicles as well as for busses.

New inverter generations aim at cost reduction and increased power density at high lifetime levels. So far, constant improvements in this regard were restricted to the electrical performance of IGBTs, diodes, and the interconnection technologies. Integrating functionality into the IGBT module, the EconoDUAL 3 enables further cost reduction.

With its integrated shunts, external current sensors are no longer needed. This saves space in the system, reduces material costs and manufacturing efforts. In addition, the integration results in high current measurement accuracy across a wide temperature range leading to a precise motor control.

The new EconoDUAL 3 shunt module family supports current ranges from 300-600A at 1,200V. It features the proven IGBT4 with Infineon’s trench/fieldstop technology. The modules are available with pre-applied Thermal Interface Material (TIM) for lowest thermal resistance and longest life time. In addition, the housing with PressFIT pins enables a fast and cost efficient assembly.