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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN2946 датащи(PDF) 17 Page - STMicroelectronics |
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AN2946 датащи(HTML) 17 Page - STMicroelectronics |
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17 / 38 page  AN2946 Hardware design Doc ID 15473 Rev 2 17/38 Figure 17. V-I curve and PSC According to Equation 1 and Equation 2, the maximum power point (MPP) occurs at Usc = 0.5 × Udc. A different R value results in different output power at the MPP delivered to the charger. From Table 2 as long as Udc is 36 V, Usc is kept at18 V no matter what the R value is. Table 3 shows the result with fixed R and variable Udc. Usc is always half of Udc during steady state. Thus the test diagram shows the way to find the MPP during the test. Table 2. Test results for different values of R (Vdc = 36 V) R[ Ω] Usc [V] Isc [A] Uba [V] Iba [A] Charger efficiency [%] 4.6 18.0 3.90 13.08 5.03 93.7 5.2 18.0 3.45 13.08 4.41 94.0 6.0 18.0 3.00 13.03 3.88 93.6 7.1 18.0 2.53 12.81 3.31 93.1 8.8 18.0 2.05 12.54 2.76 93.8 11.6 18.0 1.55 12.34 2.10 92.9 17.3 18.0 1.04 12.07 1.43 92.2 34.0 18.0 0.53 11.96 0.69 86.5 |
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