Thyristor Switched Capacitor (TSC)
Last Answer : Thyristor Switched Capacitor (TSC) TSC is a static compensator. TSC is use for compensating reactive power. Compensation is required for voltage regulation, increasing stability, ... compensating device like TCS phase angle between voltage and current can be maintain.
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Aug 9, 2017
by
anonymous

Last Answer : Thyristor can only be turned on by small gate pulse but it cannot be turn off by using gate hence thyristor is called semi controlled device.
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1.1k views
1 answer
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Sep 10, 2017
by
anonymous

Series and parallel capacitor problem
Last Answer : Series and parallel capacitor problem 1 : https://youtu.be/MSl5mRwtjAE Series and parallel capacitor problem 2 : https://youtu.be/yGwbpyEtIyw Series and parallel capacitor problem 3 : https:// ... https://youtu.be/_7KwEwWqiNU Series and parallel capacitor problem 10 : https://youtu.be/et8MCWV_OyE
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109 views
1 answer
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May 21, 2019
by
anonymous
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Last Answer : In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to improve power factor.
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717 views
1 answer
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Mar 20, 2018
by
anonymous

What is the purpose of a capacitor in an AC circuit?
Last Answer : Every AC supply is not ideal AC it contains DC component so to provide restriction to DC component in supply we have to use Capacitor
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185 views
1 answer
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Dec 16, 2017
by
anonymous

How does a capacitor improve power factor?
Last Answer : Every circuit are usually more inductive than capacitive.it means that the current lags by voltage at small angle.hence we have to compensate this situation so we use Capacitor then this lag is compensate ... angle becomes low and the value of cos(phase angle) is increase and hence power also max.
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164 views
1 answer
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Dec 16, 2017
by
anonymous
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State classification of Phase controlled rectifiers.
Last Answer : Classification of phase controlled rectifiers:
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109 views
1 answer
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May 21, 2020
by
anonymous

Application one lamp controlled from two places
Last Answer : Application one lamp controlled from two places: 1. For Stair case wiring 2. Hospital Wiring ( For operating the lamp in room and nursing station) 3. Bedroom Lighting.
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108 views
1 answer
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May 7, 2020
by
anonymous
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Single-phase mid-point controlled rectifier with RL load
Last Answer : Single-phase mid-point controlled rectifier with RL load : The circuit configuration of single-phase midpoint controlled rectifier is shown in the figure. During positive half-cycle of ... some part of next positive half-cycle of voltage with reversed polarity can appear across load.
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220 views
1 answer
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Oct 13, 2019
by
anonymous

Single-phase Midpoint controlled rectifier with Resistive load
Last Answer : Single-phase Midpoint controlled rectifier with Resistive load: 1) During positive half cycle of AC supply, a is positive with respect to b , this makes T1 forward biased and T2 is reverse ... voltage reverses the polarity and T2 is turned off. The operation is as shown in waveforms.
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627 views
1 answer
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Oct 13, 2019
by
anonymous

Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.
Last Answer : Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.
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919 views
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Jul 25, 2019
by
anonymous

Draw a neat diagram of 1Ф half wave controlled converter with RL load. Give its operation.
Last Answer : Single phase fully controlled half wave converter: The circuit diagram of single-phase half-wave controlled rectifier with RL load and without freewheeling diode is shown in Fig. (a). The SCR T is ... , when again pulse is applied, the SCR is turned on & the above cycle is repeated.
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3.0k views
2 answers
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Jul 25, 2019
by
anonymous

How are nuclear reactors controlled? Explain two different methods in brief.
Last Answer : Nuclear reactor is controlled using control rods: Control rods are made up of very high neutron absorbing material like boron, cadmium. By adjusting height of control rods on reactor core ... of nuclear reaction will increase. Whereas by pushing control rod towards the core it will reduce.
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115 views
2 answers
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Sep 8, 2018
by
anonymous

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above
Last Answer : The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases
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239 views
1 answer
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May 1, 2018
by
anonymous

A current controlled voltage source is equivalent to : (A) series voltage feed -back amplifier (B) shunt current feed -back amplifier (C) shunt voltage feed -back amplifier (D) series current feed -back amplifier
Last Answer : A current controlled voltage source is equivalent to : shunt voltage feed -back amplifier
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124 views
1 answer
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Apr 30, 2018
by
anonymous

A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is
Last Answer : Please show the solution for this question
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523 views
2 answers
asked
Apr 29, 2018
by
anonymous

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is
Last Answer : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2
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1.4k views
1 answer
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Apr 29, 2018
by
anonymous

A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is (A) 4.5 V (B) 6.75 V (C) 9 V (D) 13.5 V
Last Answer : A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is 9 V
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189 views
1 answer
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Apr 28, 2018
by
anonymous

In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals
Last Answer : In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage
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137 views
1 answer
asked
Apr 28, 2018
by
anonymous

For a 15-bus power system with 3 voltage controlled buses, the size of Jacobian matrix is
Last Answer : For a 15-bus power system with 3 voltage controlled buses, the size of Jacobian matrix is 25 x 25
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2.2k views
1 answer
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Apr 27, 2018
by
anonymous

Last Answer : The speed of a locomotive is controlled by gear box.
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88 views
1 answer
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Mar 22, 2018
by
anonymous
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Last Answer : The gravity controlled instrument has crowded scale because current is proportional to sine of deflection angle.
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343 views
1 answer
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Mar 21, 2018
by
anonymous

How many servos can be controlled by Arduino?
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69 views
0 answers
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Mar 15, 2018
by
anonymous

Last Answer : MOSFET are voltage controlled devices.
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3 answers
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Sep 23, 2017
by
anonymous

Last Answer : BJT is current controlled device.
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145 views
4 answers
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Sep 23, 2017
by
anonymous

Last Answer : No, IGBT is not the current controlled device. IGBT is a voltage controlled device. IGBT have combine qualities of MOSFET and BJT. The high switching speed of MOSFET and low conduction losses of BJT. Also, IGBT which stands for Insulated Gate Bipolar Transistor have high input impedance.
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217 views
1 answer
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Sep 13, 2017
by
anonymous

Last Answer : In BJT there is movement of electrons and holes accros the junctions which is basicaly current flow.
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364 views
2 answers
asked
Sep 10, 2017
by
anonymous

Last Answer : No, BJT is a current controlled device .
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185 views
1 answer
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Sep 10, 2017
by
anonymous

Last Answer : already answered here is mosfet current controlled device?
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173 views
1 answer
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Sep 10, 2017
by
anonymous

Chopper controlled DC motor
Last Answer : Chopper controlled DC motor
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244 views
1 answer
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Aug 25, 2017
by
anonymous

Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.
Last Answer : Thyristor operated dimmer: A popular thyristor operated dimmer circuit employ TRIAC-DIAC phase control for low AC power control. During each half-cycle, the capacitor charges through (R1+VR1). When the ... time constant {C (R1+VR1)}. Thus by reducing VR1 the lamp brightness can be increased.
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368 views
1 answer
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May 3, 2020
by
anonymous

Thyristor can be protected from over voltages by using
Last Answer : Thyristor can be protected from over voltages by using Voltage clamping device
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108 views
1 answer
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May 8, 2018
by
anonymous

Leakage current flows through the thyristor in
Last Answer : Leakage current flows through the thyristor in Forward blocking mode and Reverse blocking mode.
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211 views
1 answer
asked
May 8, 2018
by
anonymous

What is a phase control thyristor?
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153 views
0 answers
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Mar 19, 2018
by
anonymous

Why thyristor are not preferred for inverter?
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455 views
0 answers
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Mar 19, 2018
by
anonymous

What is thyristor family?
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0 answers
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Mar 19, 2018
by
anonymous

What is meant by firing angle of thyristor?
Last Answer : The point at which SCR is triggered is known as firings angle of thyristor.
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235 views
1 answer
asked
Mar 19, 2018
by
anonymous

What is the use of a thyristor in a circuit?
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2.9k views
0 answers
asked
Mar 19, 2018
by
anonymous

What is a reverse conducting thyristor?
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87 views
0 answers
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Mar 19, 2018
by
anonymous

What is the function of a thyristor?
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93 views
0 answers
asked
Mar 19, 2018
by
anonymous

Why SCR is called as thyristor?
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0 answers
asked
Mar 19, 2018
by
anonymous

Is a SCR a thyristor?
Last Answer : Yes, SCR is a thyristor. Thyristor is the family and SCR is the member of that family but SCR is universally known as thyristor.
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162 views
1 answer
asked
Mar 19, 2018
by
anonymous
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How is a thyristor used to convert AC to DC?
Last Answer : thyristor
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123 views
1 answer
asked
Mar 19, 2018
by
anonymous

What is the application of thyristor?
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90 views
0 answers
asked
Mar 19, 2018
by
anonymous

Last Answer : Yes ,it is one of the main advantage using thristors as a switch in DC circuit ,it has a high current gain
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161 views
2 answers
asked
Mar 6, 2018
by
anonymous

Explain thyristor gate drive circuit.
Last Answer : Thyristor Gate Drive Circuit: The thyristor can be turned on by pulse voltage signal at gate terminal and it does not require continuous drive signal like the transistor. The gate ... circuit provide required minimum gate voltage and gate current then the thyristor conducts properly.
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3.0k views
1 answer
asked
Feb 19, 2018
by
anonymous

parallel operation of MOSFET can be done more easily as compared to thyristor. why?
Last Answer : Parallel operation of MOSFET can be done more easily as compared to thyristor because the resistance of MOSFET is increases with increase in temperature. MOSFET have the positive temperature coefficient. In ... the parallel operation of MOSFET can be done more easily as compared to the thyristor.
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300 views
1 answer
asked
Dec 7, 2017
by
anonymous
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what are the disadvantages of thyristor?
Last Answer : Disadvantages of thyristor The silicon controlled rectifier (SCR) is unidirectional devices, so it can control power only in DC power during positive half cycle of AC supply. Thus only DC power is ... cycle. It cannot be used at higher frequencies. The gate current cannot be negative
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888 views
2 answers
asked
Dec 6, 2017
by
anonymous

write short notes on thyristor CSI .
Last Answer : Current-source inverter (CSI) is an inverter with a DC current input. Current source inverters are most commonly used in very high power AC motor drives.
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107 views
2 answers
asked
Nov 15, 2017
by
anonymous

Thyristor controlled phase angle regulator
Last Answer : Thyristor controlled phase angle regulator
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196 views
1 answer
asked
Oct 12, 2017
by
pavan
