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CHAPTER 5: EMI MEASUREMENTS
Motor current phase U [A]
1.5
1
0.5
0
−0.5
−1
q = 0.6
q = 0.7
q = 0.8
−1.5
0 5 10 15 20 25 30 35 40
Time [ms]
I[dBµA]
I[dBµA]
80
70
60
50
40
30
20
Motor current phase U [A]
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
q = 0.6
q = 0.7
q = 0.8
0
0 50 100 150 200 250 300 350
Frequency [Hz]
Figure 5.12: Output current for different values of modulation index q
10
0
−10
q = 0.6
q = 0.7
q = 0.8
Limit Cat L
0.1 1 10
Frequency [MHz]
100
80
60
40
20
Figure 5.13: DM EMI at Matrix converter input varying q
0
−20
q = 0.6
q = 0.7
q = 0.8
Limit Cat L
0.1 1 10
Frequency [MHz]
Figure 5.14: CM EMI at Matrix converter input varying q
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