Radiated Noise Properties from Inverter Unit Considering Antenna Height Dependency and Reflection Effects in Semi-Anechoic Chamber

Switching operation of semiconductor devices used in power electronics equipment generates electromagnetic (EM) noise, which may cause a malfunction in around equipment. In addition, power electronics equipment must meet electromagnetic compatibility (EMC) requirements. However, it is difficult to design power electronics equipment with suppressing EM noise due to its complex structure. In order to clarify the radiated EM noise properties from power electronics equipment, this paper presents the polarization and reflection effects of the radiated EM noise and the directivities of an inverter unit based on the 10 m far-field measurements in the semi-anechoic chamber.