Hall Effect against Shunt Sensing on the High Side
High-side shunts deliver superior low-current accuracy under high temperatures, while integrated Hall sensors reduce high-current thermal power loss.
Wide Bandgap Switching
Semiconductor Architecture
Advanced semiconductor devices fabricated from silicon carbide or gallium nitride allow power conversion systems to operate at much higher frequencies and temperatures than traditional silicon chips. Implementing wide bandgap switching improves energy efficiency and reduces the physical size of the associated passive components. The technology is rapidly transforming automotive traction inverters and industrial power supplies.
Electromagnetic Challenge
Rapid transitions of voltage and current generate severe electromagnetic interference that can easily corrupt adjacent measurement signals. This high-frequency noise requires robust shielding and differential signal routing to prevent measurement errors.
Sensing Requirement
Dynamic current sensing in these circuits requires high-bandwidth transducers capable of tracking microsecond rise times without introducing parasitic inductance. Rogowski coils and high-frequency shunt resistors are commonly selected for this task because they provide the necessary response speed. However, these sensors must be calibrated across a broad frequency spectrum to account for skin effects and frequency-dependent impedance shifts.
Instrument Calibration
Reference instrumentation used to characterize these fast-switching waveforms must possess multi-gigahertz bandwidths and exceptional vertical resolution to capture transient behavior accurately. Traditional low-frequency calibration methods are insufficient for validating these high-speed measuring channels. Consequently, laboratories must employ specialized pulse-generator standards to verify the dynamic response of the probes and digitizers before attempting to measure active switches.