Wide Bandwidth Current Sensor for Commutation Current Measurement in Fast Switching Power Electronics
Philipp Ziegler, Nathan Tröster, Dimitri Schmidt, Johannes Ruthardt, Manuel Fischer, Jörg Roth‐Stielow
Abstract
This paper presents a current sensor for commutation current measurement with a bandwidth from DC up to 315 MHz. The sensor is inserted in the commutation loop by a coaxial housing with a low insertion inductance of about 1.2 nH. The sensor is based on the HOKA principle using tunnel magnetoresistance sensors and a Rogowski-coil for low and high frequency current measurement respectively. The current sensor is tested in a half-bridge configuration equipped with gallium nitride transistors and compared to two state-of-the-art current sensors.
Topics & Concepts
Current sensorCommutationRogowski coilElectrical engineeringCurrent transformerCurrent (fluid)Power electronicsInductanceElectromagnetic coilTransistorElectronicsEngineeringTransformerVoltageMagnetic Field Sensors TechniquesSilicon Carbide Semiconductor TechnologiesAdvancements in Semiconductor Devices and Circuit Design