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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN2459 датащи(PDF) 9 Page - STMicroelectronics |
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AN2459 датащи(HTML) 9 Page - STMicroelectronics |
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9 / 35 page  AN2459 - Application note Power circuits design 9/35 Figure 5. Input voltage & current measured on STEVAL-ILB002V1 (old EMI filter) PF = 0.991 THD = 10.4% Note: Brown = Mains voltage, Blue = Input current. Reference board design measurements of STEVAL-ILB002V1(Figure 5) show a THD value of 10.4% and a PF value of 0.991. Between the manufacturing of the STEVAL-ILB002V1 reference design and publication of this application note, design work has continued and some improvements have been made. For example, EMI filter parameters have been changed from C-L-C to C-L filters, which give better results for waveform, power factor, and THD .This optimized version is given in Figure 7 and result in the measured waveforms shown in Figure 4 with THD = 10.3% and PF = 0.994. |
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