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why thyristor is called latching device?
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Sep 10, 2017
by
anonymous
thyristor
latching
device
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answered
Jan 10, 2018
by
anonymous
Thyristor can be turn on by positive gate pulse and the current will continue to flow through the device even when the gate voltage is low hence thyristor is called latching device.
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Sep 10, 2017
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why thyristor is called semi controlled device?
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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What is holding current and latching current in SCR ?
What is holding current and latching current in SCR? Draw the gate characteristics of an SCR and explain the characteristics. What are the different signals which can be used for turning on SCR by gate control? compare them.
Last answer:
(i) Holding Current: Holding current is defined as the minimum anode current required to maintain conducting SCR in the on-state. (ii) Latching Current: Latching current is defined as the ... the on-state immediately after the SCR has been turned on and the gate signal has been removed.
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Mar 19, 2018
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Why SCR is called as thyristor?
Why SCR is called as thyristor?
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why mosfet is voltage controlled device?
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Mar 19, 2018
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Why thyristor are not preferred for inverter?
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Dec 7, 2017
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parallel operation of mosfet can be done more easily as compared to thyristor. why?
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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Aug 5, 2019
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fabrication of semiconductor device and describe its need.
State any four materials used in fabrication of semiconductor device and describe its need.
Last answer:
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Sep 10, 2017
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Sep 21, 2017
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thyristor have how many terminals?
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Thyristor have three terminals anode, cathode and Gate.
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Sep 10, 2017
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thyristor can be turned off by?
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Jun 18, 2018
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Which of the following device is used for coupling microwave energy?
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Mar 22, 2018
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Sep 13, 2017
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is igbt current controlled device ?
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Mar 19, 2018
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Mar 19, 2018
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What is meant by firing angle of thyristor?
What is meant by firing angle of thyristor?
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Mar 19, 2018
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What is the use of a thyristor in a circuit?
What is the use of a thyristor in a circuit?
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Mar 19, 2018
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What is a reverse conducting thyristor?
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Mar 19, 2018
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What is the function of a thyristor?
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Mar 19, 2018
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Is a SCR a thyristor?
Is a SCR a thyristor?
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1
answer
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Mar 19, 2018
by
anonymous
How is a thyristor used to convert AC to DC?
How is a thyristor used to convert AC to DC?
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Mar 19, 2018
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What is the application of thyristor?
What is the application of thyristor?
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Mar 6, 2018
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anonymous
Is thyristor a DC switch?
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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Sep 21, 2017
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What is mean by forced commutation of thyristor?
Last answer:
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1
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asked
Sep 21, 2017
by
anonymous
What is mean by natural commutation of thyristor?
Last answer:
Natural commutation is also called as line Communication. The turning off of thyristor due to AC supply is called natural commutation or line commutation. If the thyristor is connected to AC supply ... connected to positive and anode terminal get connected to negative, this turns off the thyristor.
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1
answer
asked
Aug 8, 2017
by
anonymous
what is gate turn off thyristor (GTO)?
Draw the structural diagram of GTO. Explain briefly the switching behavior of GTO with the help of appropriate voltage and current waveform.
Last answer:
Gate Turn Off Thyristor (GTO) Conventional Thyristor can be turned on with gate terminal but can not turn off from gate terminal. But in case of Gate Turn Off Thyristor (GTO), we can turn it on and off ... subdivided as storage period (Ts), fall period (Tp) and tail period (Tt).
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1
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May 3, 2020
by
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Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.
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.
describe
the
working
principle
of
thyristor
operated
dimmer
with
help
circuit
diagram
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176
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1
answer
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May 8, 2018
by
anonymous
Thyristor can be protected from over voltages by using
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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81
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1
answer
asked
May 8, 2018
by
anonymous
Leakage current flows through the thyristor in
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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159
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1
answer
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Feb 19, 2018
by
anonymous
Explain thyristor gate drive circuit.
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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2.8k
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1
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Dec 6, 2017
by
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what are the disadvantages of thyristor?
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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thyristor
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2
answers
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Nov 15, 2017
by
anonymous
write short notes on thyristor CSI .
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.
thyristor
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answers
asked
Sep 21, 2017
by
anonymous
can we turn off thyristor using Gate?
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No we cannot turn off normal thyristor using Gate.
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turn
off
using
gate
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69
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1
answer
asked
Sep 21, 2017
by
anonymous
when a thyristor conducts?
Last answer:
Thyristor conducts when the anode voltage is greater than cathode and when the current provided to Gate.
thyristor
conduct
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asked
Aug 9, 2017
by
anonymous
Thyristor Switched Capacitor (TSC)
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.
thyristor
switched
capacitor
tsc
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1
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Apr 14, 2018
by
anonymous
The typical ratio of latching current to holding current in a 20A thyristor is :
The typical ratio of latching current to holding current in a 20A thyristor is : (A) 5.0 (B) 2.0 (C) 1.0 (D) 0.5
Last answer:
The typical ratio of latching current to holding current in a 20 A thyristor is 2.0
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1
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asked
Apr 14, 2018
by
anonymous
In a thyristor Latching current is than holding current: -
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Last answer:
In a thyristor Latching current is than holding current: - greater
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444
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1
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asked
Sep 3, 2017
by
anonymous
why transformer is called static device?
Last answer:
Because Transformer do not have any moving part hence transformer is called static device.
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