1) The range of control angle∝varies from 0 to 150° in tie control connection.
2) Tie control connection is suitable for motor control.
3) The neutral wave controller is not used for motor control.
Which of the above statements is /are correct?
Question 2
If Duty ratio in both Buck converter and Boost converter is 0.4 then, output voltage in Buck and Boost converter respectively are [Given supply voltage is 30 V]
Question 3
Statement I: The control signal in MOSFET is much smaller than the control signal required in BJT.
Statement II: The input impedance of MOSFET is low and of BJT is very high.
Question 4
Diode conducts for____ in a 3 –fhalf controlled rectifier having firing angle greater than 60°
Consider there is a freewheeling Diode and a constant load current.
Question 5
When the conducting angle of thyristor increases then its average rating of on state current
Question 6
Which of the following rectifiers have more size practically?
Question 7
Statement 1 (S1): For 3 – VSI with 180° conduction mode, phase voltage waveform is quasi square wave.
Statement 2 (S2): For 3 – VSI with 120° conduction mode, line voltage waveform is 6 step wave form.
Question 8
During parallel operation of SCRs, current distribution is made uniform by?
1) Mounting SCRs on same heat sink.
2) Connecting a small resistor in series with each SCR.
3) Connecting magnetically coupled inductors in series with SCRs.
The correct statements are:
Question 9
What is the maximum value of switch utilization ratio (SUR) for a buck boost converter?
Question 10
In a zero-voltage switching resonant converter Vs = 30V, Lr = 3μH, Cr = 30nF and load current is 8A . What is the maximum voltage across switching element?
VSI with 180° conduction mode, phase voltage waveform is quasi square wave.
VSI with 120° conduction mode, line voltage waveform is 6 step wave form.
