Analysis of Electromagnetic Induced Noise with Laminated Bus Bar

Abstract

Recently laminated bus bars are being used in power electronics circuits to realize low inductance. When high-speed switching is required, an electromagnetic induced noise is generated because the pulse current generates a magnetic field in the neighborhood of the power circuits. In this research, the induced noise is verified from the relationship between the noise current and the line impedance of bus bars by the difference of the inverter circuit structure. Furthermore, the induced noise that is related to the circuit structure and common- or normal-mode currents in the circuit operation is discussed by considering the experiments and equivalent circuit simulations.