IGBTs and monolithic IGBT/diodes with pilot current sensors, including control techniques for using them to achieve high-performance current regulation in AC motor drives
Pilot current sensors have been successfully integrated into both the IGBT as well as the accompanying anti-parallel rectifier in a monolithic device. The availability of these integrated sensors will make it possible to eliminate bulky and expensive discrete current sensors that are presently used in a wide variety of inverter applications including motor drives. Techniques have been demonstrated experimentally for delivering high-performance sinusoidal current regulation for motor drives using incomplete current feedback measurements provided by integrated pilot current sensors installed only in the low-side inverter switches. Currently, researchers are proceeding with a small number of pilot runs of these monolithic pilot sensor devices in order to extract characterization data that can be used to evaluate their readiness for commercialization.