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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 9
1.
In a semi converter feeding a resistive load
the waveshapes of output voltage and output current are exactly similar
the waveshapes of output voltage and output current can not be similar
the waveshapes of output voltage and output current are similar only for low values of firing angle
the waveshapes of output voltage and output current may be similar or dissimilar
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
In an n stage high frequency series inverter having a time period T, each stage is active for a time interval of
T
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
In a 3 phase semiconverter, the output voltage becomes discontinuous for
firing angle > 30°
firing angle > 60°
firing angle > 90°
firing angle > 120°
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
A single phase fully controlled bridge converter is feeding an RLE load. Input voltage is Vm sin ωt and firing angle is a. If average current is I0, then
cos a = RI0 + E
cos a = RE0 + E
cos a = E0 - RI0
cos a = E - RI0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
In integral cycle control of ac regulator, the input power factor is equal to
duty cycle a
a2
a
(a)1/3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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