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110年 - 110 國立臺灣大學_碩士班招生考試_電機工程研究所乙組:電力工程(含電力系統、電機機械、電力電子)#101255
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5. Assume tha
. Find the maximum value for
(10%)
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6. The radius of each sub-conductor is 1 cm for the following 345 KV, 60 Hz, completely transposed balanced three phase lines. Find the per phase inductance In H/m and per phase capacitance to neutral in F/m. (10%)
#424633
(a) How many modes if the converter operates in continuous conduction mode (CCM)? Draw the equivalent cireuit of each mode. (4%)
#424634
(b) Determine the inductance of L if the co nverter is operating at the boundary conduction mode (BCM), where inductor current touches zero right before switch turn-on. (4%)
#424635
(c) Follow qucestion (b). Draw the time waveforms of below variables for two switching periods. Mark the peak and valley values. Define the variable polarity in the circuit. Calculation procedure is required. Duty cycle, current through L, current through Co, voltage across L. (8%)
#424636
(a) What is the de voltage across Clwhen the converter below is in steady-state operation? (5%)
#424637
(b) Find the RMS value of a sine wave signal with peak value of 10 V. (3%)
#424638
(c) Why the diode Dlin the buck converter below will turn-on after Ql tumn-of!? (3%)
#424639
(d) Why the integration of inductor r voltage across a switching period is zero for a buck converter at steady-state? (3%)
#424640
(e) Follow (c). Assume there is a small inductor in series with RL. Draw the voltage waveform of this inductor voltage for two switching periods. (4%)
#424641
1. Please calculate the de Broglie wave length of an electron at velocity of 106 cm/s (5%)
#424642
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110年 - 110 國立臺灣大學_碩士班招生考試_電機工程研究所乙組:電力工程(含電力系統、電機機械、電力電子)#101255
110年 · #101255
109年 - 109 國立臺灣大學_碩士班招生考試_電機工程研究所乙組:電力工程(含電力系統、電機機械、電力電子)#105857
109年 · #105857
. Find the maximum value for
(10%)
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. Find the maximum value for (10%)