Implementation and Performance of a Current Sensor for a Laminated Bus Bar
Résumé
This paper presents a current sensor embedded in a
laminated bus bar. The proposed sensor is based on the Rogowski
coil principle and it can detect the magnetic flux corresponding
to a derivative waveform of the current within the bus bars.
The frequency characteristics of the current sensor including
the parasitic parameters depending on the circuit geometry are
discussed. After the design of the current sensor using a PEECbased
software, the proposed sensor was implemented using fourlayers
and three PCBs. It is confirmed that the verification of the
proposed current sensor embedded in the laminated bus bar can
be performed by the measurement of turn-on and -off switching
waveforms using a buck converter circuit, rated at 50 V and 4 A.