Multi-physics Integration of Multivariable Sensing in Wide Bandgap Power Electronics Systems

Download or read book Multi-physics Integration of Multivariable Sensing in Wide Bandgap Power Electronics Systems written by Minhao Sheng and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Giant magnetoresistance (GMR) field detectors were integrated into Si power modules for non-invasive current and temperature sensing. To meet the requirement of fast switching WBG systems, methodologies for improving the bandwidth and SNR of GMR sensing system with simultaneous EMI suppression is developed. To deal with the phase shift error caused by the ferromagnetic material (Ni) employed in the SiC module, methodologies for reducing phase shift error by decoupling eddy currents is developed. FBW extension methods are also presented to fully integrate the sensing system to the regions adjacent to the DBC substrate in the SiC modules and to improve detector position sensitivity. Existing PCB integrated sensing techniques introduce extra stray inductance to the system. A general guideline is established to enable GMR integrated sensing design in GaN PCBs without introducing stray inductance. Transistor, capacitor and inductor currents are sensed in a GaN System evaluation board. Methodologies for auto-generation of the decoupling matrix is developed to provide high detector positioning tolerance. This work also proposes methodologies for utilizing the already integrated current sensors for simultaneous monitoring of bond wire lift-offs, solder layer cracks and capacitor degradation in a power module. These methods work in real time and have an immediate response when degradation occurs.