Integrated Input EMI Filter for a 2 kW DC-fed 3-phase Motor Drive

EMI filters are mainly made up of passive components including capacitors and inductors. These passive components can be a significant portion of the total converter system volume. Integration techniques can be used to improve space utilization and reduce the total system volume. This paper gave a comparison on existing passive integration technologies, and then developed an integrated EMI for 2 kW DC-fed 3-phase motor drive system. Design procedures are established and FEA simulation is used in verifying the design. Both small signal and in circuit EMI noise test were performed to verify the filter design.