Analysis of Near Field Noise Voltage Caused by Pulse Current on Power Electronics Circuits

Abstract

Recently, the design procedure of a power electronics circuit structure is discussed for high power density circuits or thin structure converters. Control circuits of the converter circuit may connect close to the power circuit. When the pulse current flows into the power circuit, it radiates the magnetic field and may generate near field noise voltage to the control circuit. Therefore, it is important for the power electronics circuits to evaluate the near field noise voltage by experiment. This paper shows the measurement results of the near field noise voltage and the electromagnetic force voltage of a small area loop antenna from the 15A, 100kHz buck chopper circuit. Moreover, this paper discusses that the noise voltage may affect the control circuits in the high power density circuits.