Reactor vibration analysis in consideration of coupling between the magnetic field and vibration

This paper describes how the cause of noise in a hybrid vehicle reactor was elucidated by the development of technology to analyze the coupling between the magnetic field and vibration in the high-frequency range (5 to 10 kHz) and how reactor noise was reduced as a result. To date, magnetic field and vibration analyses, for reactors have been done but mainly within conditions at the commercial frequency range (around 60 Hz). (Hagiwara, S, 1982), (Hori, Y, 1995), (Yanari, T, 1996). This paper describes how the reactor behavior in the high-frequency range (5 to 10 kHz) was clarified by constructing a suitable model and analyzing electromagnetic fields and vibration phenomena occurring in it. Experimental results were also used for the analyses. In addition, this analytical technique was used to elucidate the cause of noise and to develop a new form of reactor to reduce noise. As a result, noise was reduced by 10 dB or more.