| Abstract |
The structure of power converters with a rectifier and an inverter is studied through
simulations using the TLM (Transmission-Line Modeling) Method. The structure has the ability to
prevent EMI noises from diffusing in noise sources. First, analyses regarding frequencies with EMI
noises occurring by switching operations are performed using circuit parameters of an Intelligent
Power Module (IPM) composed of the power converters, which were previously measured, and then
obtained results are verified by experiments. Processes in which the noise with the verified frequency
diffuses into power transmission lines formed by power converters are analyzed by the EMI noise
analyzing software (Micro-Stripes) used the TLM Method. On the basis of the analyzed results,
structures of the power transmission lines suitable for attenuating EMI noises are proposed and these
are applied to power converters formed using a multi-layer power printed board. One structure was
chosen and compared with the conventional molded type one. The damping rate of the near-magnetic
field was improved as much as 30dB. Moreover, when the proposed power converter was equipped on
electric vehicles (EVs), influence which the near-magnetic field has on an approaching car was
investigated in comparison with radiated EMI noises between electric vehicles (EVs) with the
proposed and conventional power converters. As a result, it was proved through simulations that EVs
with little electromagnetic interference would be realizable by applying the proposed structure. |
