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CHAPTER 7: FILTER DESIGN AND REALIZATION a b c 8mH 1.4mH 68nF 10nF Ferrite beads Figure 7.14: Schematic of the output filter Differential Mode Common Mode 3 × AMCC 6.3 (40 turns) 1.4mH 3 × AMCC 16A (92 turns) 8mH 3 × B32023A3683M 68nF 6 × CST 17/9.5/29-3S4 1 × B32022A3103M 10nF 1 × CST 17/9.5/29-3S4 Table 7.5: List of material for EMI output filter 95 a b c
CHAPTER 7: FILTER DESIGN AND REALIZATION 7.6 HF Modelling the output filter Once the actual inductors have been built, they have been modelled to create an HF component useful for simulations. Because the filter inductor has been experimentally implemented by means of two single inductors in series, starting from the model in [56], a final circuit model like the one in Fig. 7.15 has been used. The same parametriza- tion procedure used for the other system’s parts has been here used: a GA fitting of the simulation model to match the experimental impedance measurement. For the DM inductor the procedure is quite straightforward because the experimental impedance measurement needed for the model fitting is a simple measurement between the two terminals. Once the real inductor was available and the filter implemented, proper HF modelling followed, giving for the model in Fig. 7.15 the values in Table 7.6. Figure 7.16 shows the matching for one inductor, while Figure 7.17 reports the magnitude of the impedance for all the three DM inductors. In the latter figure it is possible to see a difference in the impedance profile, this is due to two inevitable factors: the inaccuracies during the core fabrication process and the differences in thickness of the air-gap due to the manual assembly. L1 L2 C1 R1 C2 R2 Figure 7.15: Inductor model Parameter Phase U Phase V Phase W L1 [mH] 9.23 8.3 8.66 L2 [mH] 0.52 0.83 0.58 R1 [kΩ] 93 72 88 R2 [kΩ] 1.3 8.0 4.3 C1 [pF] 31.8 38.3 27.7 C2 [pF] 110 76.2 117 Table 7.6: Model parameters Regarding the further inductive component of the output filter, the ferrite tubes, the impedance of the wire inside it has been measured. To obtain a HF simulation model of this impedance, after few trial and error attempts using different circuit topologies, the network as in Fig. 7.18 has been selected to better match the measured impedance. Table 7.7 reports the model parameters (obtained still with the same GA procedure) and Fig. 7.19 shows the impedance matching obtained with such model. 96
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EMI Filter Design for Matrix Conver
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that may involve long Finite Elemen
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CONTENTS 3.1 Introduction . . . . .
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CONTENTS B External DLL 118 B.1 C c
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LIST OF FIGURES 2.10 Measurement at
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LIST OF FIGURES 6.9 CM Conducted EM
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LIST OF FIGURES 8.18 Input CM and D
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LIST OF TABLES 7.9 Attenuation for
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CHAPTER 1: INTRODUCTION the receive
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CHAPTER 1: INTRODUCTION Abs. Magnit
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CHAPTER 1: INTRODUCTION Figure 1.5:
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CHAPTER 1: INTRODUCTION • Make th
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CHAPTER 1: INTRODUCTION Figure 1.10
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CHAPTER 1: INTRODUCTION the filters
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CHAPTER 1: INTRODUCTION experimenta
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CHAPTER 2 Experimental implementati
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CHAPTER 2: EXPERIMENTAL IMPLEMENTAT
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CHAPTER 3: HF MODELLING STRATEGY im
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CHAPTER 3: HF MODELLING STRATEGY ci
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CHAPTER 3: HF MODELLING STRATEGY Re
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CHAPTER 3: HF MODELLING STRATEGY De
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CHAPTER 3: HF MODELLING STRATEGY C2
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CHAPTER 4: MOTOR AND MATRIX CONVERT
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CHAPTER 4: MOTOR AND MATRIX CONVERT
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Page 131 and 132: APPENDIX A Scientific Publications
Page 133 and 134: B.1 C code APPENDIX B External DLL
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Page 139 and 140: References [1] RTCA Incorporated. R
Page 141 and 142: REFERENCES nious drives. In Europea
Page 143: REFERENCES [48] D.F. Knurek. Reduci
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