Abstract
Existing current sensors suffer from insufficient measurement bandwidth or large insertion area to faithfully capture the continuous switching transient current of wide-bandgap devices. The combinational Rogowski coil concept is proposed here, where the self-integrating region of a shielded Rogowski coil is combined with its differentiating region to extend the overall measurement bandwidth. The coil design methodology, including the parasitic element model and practical design boundaries, is discussed. The concept is implemented with printed circuit boards and prototypes demonstrated up to 300 MHz bandwidth. The coil can also be easily integrated in an SiC <small>mosfet</small> module power stage and it is shown that the switching transient current waveform is faithfully captured.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
