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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
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題組內容
[7] True or False [20 pts]
7c. For a periodic waveform, the average valuc will always be the same or lower than the RMS value. [2 pts]
相關申論題
7d. For a periodic waveform, the maximum theoretical value for total harmonic distortion (THD) is 1. [2 pts]
#451254
7e. In the square-wave shown below, the amplitude of the fundamental' component is larger than A. [2 pts]
#451255
7f. The total harmonic distortion (THD) of a pure square wave (50% duty) is the same regardless of frequency and amplitude. [2 pts]
#451256
7g. For a diode rectification circuit with a resistive and inductive (R-L) load, the instantaneous output voltage (over the load) may become negative. [2 pts]
#451257
7h.Th. For an ideal buck converter operating in disco ontinuous conduction m node (DCM), the input- to-output voltage relationship does not depend on the output capacitor value C. [2 pts]
#451258
7i. A half-bridge inverter creates 2 different voltages over the output, while the full-bridge inverter creates 4 different voltages over the output. [2 pts]
#451259
7j. For a flyback converter, ideally, the coupled inductor has zero magnetizing inductance. [2 pts]
#451260
8a. Name two converter topologies with galvanic isolation between input and output. [2 pt].
#451261
8b. Explain why galvanic isolation is sometimes required and give a specific example. [2 pts]
#451262
8c. A buck-boost converter is operating in discontinuous conduction mode (DCM). The inductor value is doubled, but switching frequeney, duty ratio, and average inductor current remain the same. Which mode does the new circuit operate in? Explain your answer. [2pts]
#451263
相關試卷
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
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