Is a SCR a thyristor?

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asked Mar 19, 2018 by anonymous

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Why SCR is called as thyristor?

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Draw a neat labelling V-I characteristics of SCR and explain the region

Last answer: (i) Latching current: It is the minimum anode current required to maintain the SCR in the conduction state just after turn-on and the gate signal has been removed. (ii) Holding current: It is the minimum anode current required to hold the conducting SCR in the ON state.

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asked Apr 28, 2018 by anonymous

A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc

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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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asked Apr 28, 2018 by anonymous

In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load,

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asked Oct 13, 2019 by anonymous

How GTO is advantages over SCR

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asked Apr 29, 2018 by anonymous

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asked Apr 28, 2018 by anonymous

An SCR without any external connections is considered as

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asked Mar 6, 2018 by anonymous

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Last answer: Yes, SCR is a unidirectional switch.

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asked Feb 3, 2018 by anonymous

What is holding current and latching current in SCR ?

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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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asked Aug 8, 2017 by anonymous

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asked Mar 6, 2018 by anonymous

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asked May 8, 2018 by anonymous

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asked Mar 19, 2018 by anonymous

Why thyristor are not preferred for inverter?

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Explain thyristor gate drive circuit.

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asked Dec 7, 2017 by anonymous

parallel operation of mosfet can be done more easily as compared to thyristor. why?

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asked Dec 6, 2017 by anonymous

what are the disadvantages of thyristor?

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asked Nov 15, 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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asked Apr 28, 2018 by anonymous

In a 3-phase converter circuit during commutation when one SCR in one phase is turned on to turn-off an SCR

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asked Apr 28, 2018 by anonymous

The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a

The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ (A) directly proportional to α and Φ (B) inversely proportional to α and Φ (C) directly proportional to α and inversely proportional to Φ (D) directly proportional to Φ and inversely proportional to α

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asked Jun 18, 2018 by anonymous

An inductor is connected in series with SCR to protect it from

An inductor is connected in series with SCR to protect it from A) Excessive high voltage B) Excessive high dv/dt C) Excessive high di/dt D) Excessive large forward current

Last answer: An inductor is connected in series with SCR to protect it from Excessive high di/dt

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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.

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asked Sep 21, 2017 by anonymous

What is mean by forced commutation of thyristor?

Last answer: By using some circuit the forward DC current of thyristor is forced to zero is called forced commutation.

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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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asked Sep 10, 2017 by anonymous

what is thyristor commutation?

Last answer: Thyristor commutation means turning off thyristor.

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asked Sep 10, 2017 by anonymous

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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asked Sep 10, 2017 by anonymous

why thyristor is called latching device?

Last answer: 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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Purpose of Selective Catalytic Reduction (SCR)

Last answer: Purpose of Selective Catalytic Reduction (SCR) : 1. It reduces Nox 75% to 90% 2. Converts it in to molecular nitrogen and water vapor 3. It reduces HC emission up to 80% 4. It reduces PM emission 20 to 25%.

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asked Mar 15, 2018 by anonymous

How do you test an SCR?

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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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asked Sep 21, 2017 by anonymous

can we turn off thyristor using Gate?

Last answer: No we cannot turn off normal thyristor using Gate.

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anonymous · Answer 1 · 2018-06-25T04:19:20+0000

Yes, SCR is a thyristor. Thyristor is the family and SCR is the member of that family but SCR is universally known as thyristor.

Is a SCR a thyristor?

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