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CHAPTER 8: FILTER REALIZATION AND EXPERIMENTAL RESULTS Figure 8.1: Output filter with component details The final layout for the components can be seen in Fig. 8.1 where all the parts are highlighted; it is worth mentioning that the weight of the whole output EMI filter is 1.5kg, that is almost half of the matrix converter’s weight, that is 3.6kg. 8.3 Experimental emission measurements This section collects and reports the current emission measurements before and after the filter insertion, to provide a final overview of the system after the filter have been set in place. Different measures have been carried out at different voltages and currents: two different input supplies have been fed to the converter: the aircraft one at 115Vrms, 400Hz and the standard grid at 240Vrms, 50Hz. The modulation index, once the motor has started, has initially been kept constant at the final value of 0.7, while two different output frequency have been generated: 50Hz and 100Hz. A further set of measurements will also report measurements for different values of 103
CHAPTER 8: FILTER REALIZATION AND EXPERIMENTAL RESULTS the modulation index, to verify the consistency of the filter behaviour. Three values for the modulation index have been chosen: the lower one has experimentally been found in such a way that it will grant the minimum current but still will allow the motor rotation, the higher value has been set to be equal to 0.85 that is close to the theoretical maximum value for this type of modulation, plus a middle value chosen between these two. 8.3.1 Input emissions This section illustrates that the output filter has no actual influence on the input emissions neither improvement or deterioration for both DM and CM. A first set of figures show the measured input EMI while supplying the converter with an input supply at 115V, 400Hz. The input emission are compared before and after the filter insertion for the two output frequencies generated by the converter: 50Hz and 100Hz. Fig. 8.2 and Fig. 8.3 report the DM emissions while Fig. 8.4 and Fig. 8.5 plot the CM ones. I [dBµA] 70 60 50 40 30 20 10 0 −10 0.1 1 10 Frequency [MHz] w/o filter With filter Limit Figure 8.2: Comparison of Measured input DM emissions: without and with output I [dBµA] 70 60 50 40 30 20 10 0 EMI filter (115V-400Hz to 80V-50Hz) −10 0.1 1 10 Frequency [MHz] w/o filter With filter Limit Figure 8.3: Comparison of Measured input DM emissions: without and with output EMI filter (115V-400Hz to 80V-100Hz) 104
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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 77 and 78: CHAPTER 5: EMI MEASUREMENTS iA iB I
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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
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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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