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CHAPTER 7: FILTER DESIGN AND REALIZATION Fig. 7.25 shows the schematic of the designed input filter, while Fig. 7.24 shows the ex- pected input CM emissions after its insertion, demonstrating the filtering effectiveness. I[dBµA] 100 80 60 40 20 0 −20 Measured emissions Estimated emission after filter insertion −40 0.1 1 10 Frequency [MHz] Figure 7.24: Input CM emissions estimation after filter insertion a b c 8mH 1.4mH 68nF 68nF Figure 7.25: Schematic of the input filter 101 a b c
CHAPTER 8 Filter realization and experimental 8.1 Introduction results This last chapter shows and describes the final assembly of the output filter, providing the experimental layout followed by various experimental emission measurements to prove the effectiveness of the ouput EMI filtering. Different measurements for two running conditions supplying 50Hz and 100Hz output will be shown, comparing the emissions before and after the filter insertion to verify its attenuation; the experimental results will be provided not just for a standard aircraft supply at 115V and 400Hz but also for a standard grid supply at 240V and 50Hz. 8.2 Assembling the output filter Given the chosen filter layout and parameters values designed in the previous chapter the output EMI filter has been built. The inductors have been manually wound in a sin- gle layer bobbin to minimize the parasitic capacitive coupling, using a 0.8mm diameter copper wire as suggested in the inductor code designer program. Regarding the two cores forming the global DM inductor (Fig. 7.14), the large one (AMCC 16A) allowed two bobbins of 45 turns, one on each side of the double C core; however the other one (AMCC 6.3), because of saturation, did not allow more than 40 turns, thus permitting the winding of just one side. After the two inductors, the DM 68nF capacitors have been connected toghether with the 10nF capacitor from their central point to earth. The ferrite tubes, around the output phase wires, as described in chapter 7 conclude the filter setup. 102
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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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Page 131 and 132: APPENDIX A Scientific Publications
Page 133 and 134: B.1 C code APPENDIX B External DLL
Page 135 and 136: APPENDIX B: EXTERNAL DLL Tseq_Pulse
Page 137 and 138: APPENDIX B: EXTERNAL DLL B.2 MAST c
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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