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CHAPTER 6: SIMULATIONS OF INPUT AND OUTPUT SYSTEM EMI
6.7 Input EMI simulations
To simulate the input currents the data generated in section 6.5 has again been used,
with the same procedure as for the output, to generate the spectrum signal. Fig. 6.11
and 6.12 show the EMI emission at the input of the Matrix converter. Here there is a
good match for the common mode experimental and simulated results; the differential
mode though, presents a discrepancy in the range 0.5–2MHz where a mild resonant
peak is observable in the experimental results. Various attempt have been made to
create a more accurate DM model, removing for instance the CM components from the
model, but it did not provide sufficiently good results.
I[dBµA]
I[dBµA]
120
100
80
60
40
20
0
Simulation
Measurement
Cat L limit
0.1 1 10
Frequency [MHz]
80
70
60
50
40
30
20
10
0
Figure 6.11: CM Conducted EMI, input
Simulation
−10
−20
Measurement
Cat L limit
0.1 1 10
Frequency [MHz]
Figure 6.12: DM Conducted EMI, Input
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