Wisconsin Alumni Research Foundation

Method And Apparatus For Integrating Current Sensors In A Power Semiconductor Module
WARF: P160204US01

Inventors: Robert Lorenz, Minhao Sheng, Hiroyuki Nogawa, Yoshinari Ikeda, Eiji Machizuki

The Invention
An improved system for measuring current within a power semiconductor module is disclosed, where the system is integrated within the power module. The system includes a point field detector sensing a magnetic field resulting from current flowing in one phase of the module. A lead frame conductor may be provided to shape the magnetic field and minimize the influence of cross-coupled magnetic fields from currents conducted in other power semiconductor devices within one phase of the module. Optionally, a second point field detector may be provided at a second location within the module to sense a magnetic field resulting from the current flowing in the same phase of the module. Each phase of the power module includes at least one point field detector. A decoupling circuit is provided to decouple multiple currents flowing within the same phase or to decouple currents flowing within different phases of the power module.
For current licensing status, please contact Michael Carey at [javascript protected email address] or 608-960-9867