896 views
what are the disadvantages of thyristor?

2 Answers

Answer :

It require exta trigger ckt
In dc it is forced commutated,so xtraa ckt is required
It require R-C shunt for protection during switching
Like 0 like
Thyristor has high switching losses that's y it is not used in choppers (fixed DC to variable DC)

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 controlled with the help of SCR.
  • In AC circuit, it needs to be turned on each cycle.
  • It cannot be used at higher frequencies.
  • The gate current cannot be negative
Like 0 like

Please log in or register to answer this question.

Related questions

109 views

Description : Thyristor can be protected from over voltages by using

Last Answer : Thyristor can be protected from over voltages by using Voltage clamping device

1 answer
216 views

Description : Leakage current flows through the thyristor in

Last Answer : Leakage current flows through the thyristor in Forward blocking mode and Reverse blocking mode.

1 answer
153 views

Description : What is a phase control thyristor?

0 answers
457 views

Description : Why thyristor are not preferred for inverter?

0 answers
68 views

Description : What is thyristor family?

0 answers
243 views

Description : What is meant by firing angle of thyristor?

Last Answer : The point at which SCR is triggered is known as firings angle of thyristor.

1 answer
2.9k views

Description : What is the use of a thyristor in a circuit?

0 answers
88 views

Description : What is a reverse conducting thyristor?

0 answers
93 views

Description : What is the function of a thyristor?

0 answers
97 views

Description : Why SCR is called as thyristor?

0 answers
163 views

Description : 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.

1 answer
124 views

Description : How is a thyristor used to convert AC to DC?

Last Answer : thyristor

1 answer
90 views

Description : What is the application of thyristor?

0 answers
162 views

Last Answer : Yes ,it is one of the main advantage using thristors as a  switch in DC  circuit ,it has a high current gain

2 answers
3.0k views

Description : 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.

1 answer
302 views

Description : 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.

1 answer
108 views

Description : 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.

2 answers
1.7k views

Description : 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).

1 answer
112 views

Description : What are the disadvantages of the linear regulator? how are they overcome in the switching regulator? What is continuous and discontinuous mode switching regulator?

Last Answer : Disadvantages of the linear regulator: Linear regulator waste power in the form of heat. Linear regulator has very low efficiency. Linear regulator cannot be used for the step ... between continuous mode and discontinuous mode switching regulator.

1 answer
381 views

Description : 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.

1 answer
119 views

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

1 answer
113 views

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.

1 answer
95 views

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

1 answer
97 views

Last Answer : Thyristor conducts when the anode voltage is greater than cathode and when the current provided to Gate.

1 answer
62 views

Last Answer : Thyristor have three terminals anode, cathode and Gate.

1 answer
136 views

Description : thyristor can be turned off by?

Last Answer : Thyristor can be turned off by making anode potential equal to cathode potential or by making anode potential less than cathode potential.

1 answer
146 views

Last Answer : Thyristor commutation means turning off thyristor.

1 answer
1.1k views

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.

1 answer
931 views

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.

1 answer
208 views

Description : 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.

1 answer
315 views

Description :  State the disadvantages of skin effect.

Last Answer : Disadvantages of skin effect:- 1. Full cross section of conductor is not utilized, Therefore effective area of conductor reduces so its resistance increases. 2. Due to increase in resistance, copper ... increases (Since Voltage drop = IR ) 5. So voltage regulation becomes poor (increases) 

1 answer
497 views

Description : State advantages and disadvantages of radial distributor system. 

Last Answer : Advantages of radial distributor system: 1. Design of layout is simple. 2. Capital cost & Erecting cost is less as there is only one feeder. 3. Time required for completion of ... maintain supply to consumers when there is maintenance on feeder. 3. Voltage fluctuations are more.

1 answer
91 views

Description : advantages and disadvantages of ICs.

Last Answer : Advantages of ICs: 1.The physical size of an IC is extremely small (generally thousand times smaller) than that of discrete circuits. 2. The weight of an IC is very less as compared to that of ... is high 3. Power dissipation is limited. 4. ICs are very delicate and need extra care while handling

1 answer
2.5k views

Description : What are advantages and disadvantages of Mechatronics system? 

Last Answer : Advantages of Mechatronics system:  High level of integration.  Increased functionality and better design.  More use of electronics and software instead of mechanical function.  Assumes ... Its replacement is difficult, that it is difficult to change old system to new system. 

1 answer
2.4k views

Description : State advantages and disadvantages of fiber optic communication

Last Answer : Advantage of fiber optic communication: 1.Greater information capacity/ higher bandwidth OFC's are capable of transmitting several gigabits per second over hundreds of miles allowing millions of ... are not flexible 7.Requiring more protection around the fiber cable compared with copper cable

1 answer
119 views

Description : State advantages and disadvantages of continuous wave Radar

Last Answer : Advantages continuous wave RADAR : 1.Single frequency transmission and hence narrow receiver bandwidth 2.Duty cycle is unity, so mean power can be as high as transmitters will permits. 3.Ability ... required for receiver and transmitter. 3.Cannot detect targets crossing its beam at right angles.

1 answer
81 views

Description : State advantages & disadvantages of electromagnetic flow meter.

Last Answer : Advantage: Provides wide linear range. 2) Ability to measure reverses flow. 3) Gives rapid response to flow changes. 4) No obstruction is created to flow. 5) It can handle corrosive as ... and pipe networks with relatively short inside diameters. 3) It is useful for electrically conducting fluid.

1 answer
80 views

Description : List advantages and disadvantages of MEMS.

Last Answer : Advantages : 1. Batch fabrication and hence reduced cost. 2. Reduced size and reduced power ( due to pin size and reduced package volume) 3. High precision and resolution. 4. Reduced ... cannot be loaded with large forces because brittle materials can be fractured easily under high stress.  

1 answer
114 views

Description : What are the disadvantages of Open loop control system?

Last Answer : Open loop control system are less reliable. In open loop control system Optimization is not possible. Open loop control system are less accurate.

1 answer
91 views

Description : State the advantages and disadvantages of hydroelectric power plant.

Last Answer : Advantages of Hydroelectric power plant:-  1. There is no air pollution and other environmental problems. 2. The fuel (water) is available freely. 3. No fuel transportation cost so; there is ... , this can force the relocation of large numbers of riverside cities, towns, villages & people.

1 answer
176 views

Description : State any two advantages and two disadvantages of nuclear power plant.

Last Answer : Disadvantages of Nuclear Power Plant: -   1. The capital cost of Nuclear power plant is very high as compare to other power plant of same capacity. 2. The erection & ... material could be released into the environment. Causing extensive damage to the mankind,animals and environment.

4 answers
127 views

Description : State any four advantages and four disadvantages of diesel electric power plant. 

Last Answer : Advantages of Diesel electric power plant:- 1) The design and layout of Diesel electric power plant is simple. 2) It requires less space. 3) Time required for complete erection of diesel power plant is less ... . 9) The useful life is very short. 10) Availability of fuel in future may be limited.

1 answer
172 views

Description : Write any four advantages and four disadvantages of thermal power plant.

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

3 answers
82 views

Description : Write any two disadvantages of hydro power plant.

Last Answer : Disadvantages of hydro power plant: i) Due to high cost of civil engineering works, the capital cost per kW of hydro plants is considerably higher than that of steam plants. ii) Hydro ... ) Hydro plant reservoir submerges huge areas, uproots large population and creates social and other problems. 

1 answer
176 views

Description : Write any two disadvantages of ammeter shunts.

Last Answer : Disadvantages of ammeter shunts: 1. Errors are caused because of change in temperature. 2. Most suitable for DC measurement. 3. Power loss takes place.

1 answer
1.8k views

Description : State any two disadvantages of one wattmeter method of measurement of 3 phase power.

Last Answer : State any two disadvantages of one wattmeter method of measurement of 3 phase power. Disadvantages of one wattmeter method:- 1. Only used for balanced load 2. It can not be used for ... connection then neutral point must be available 4. Delta connection must be opened to connect current coil.

1 answer
4.4k views

Description : Write advantages and disadvantages of positive and negative feedback.

Last Answer : Advantages of Positive Feedback: i) Voltage gain increases. ii) No phase shift is provided. iii) Feedback signal and input signal are in phase. iv) Input and Output voltage increases.  ... ii) Feedback signal and input signal are out of phase. iii) Input and Output voltage decreases.

1 answer
68 views

Description : The main disadvantages of having poor power factors are:  (A) High cost of station and distribution equipment (B) Poor voltage regulation (C) High energy loss in conductor (D) All of the above

Last Answer : The main disadvantages of having poor power factors are:  (A) High cost of station and distribution equipment (B) Poor voltage regulation (C) High energy loss in conductor (D) All of the above

1 answer
174 views

Description : Explain the advantages and disadvantages of using memory I/O and standard I/O.

Last Answer : Memory mapped I/O and standard I/O are the two methods for communicating microprocessor with peripherals. Processor talks to both memory and peripheral using the same bus.Two ways to talk to a peripheral. ... of standard I/O is no loss of memory addresses to the use as I/O addresses.

1 answer
109 views

Description : What are the advantages and disadvantages of automation?

0 answers
...