what are the disadvantages of thyristor?

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

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

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

write short notes on thyristor CSI .

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

what is gate turn off thyristor (GTO)?

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

What are the disadvantages of linear regulator ?

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

Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.

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

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.

1 answer

113 views

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.

1 answer

95 views

can we turn off thyristor using Gate?

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

1 answer

97 views

when a thyristor conducts?

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

1 answer

62 views

thyristor have how many terminals?

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

1 answer

136 views

thyristor can be turned off by?

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

what is thyristor commutation?

Last Answer : Thyristor commutation means turning off thyristor.

1 answer

1.1k views

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.

1 answer

931 views

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.

1 answer

208 views

Thyristor Switched Capacitor (TSC)

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

State the disadvantages of skin effect.

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

State advantages and disadvantages of radial distributor system.

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

advantages and disadvantages of ICs.

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

What are advantages and disadvantages of Mechatronics system?

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

State advantages and disadvantages of fiber optic communication

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

State advantages and disadvantages of continuous wave Radar

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

State advantages & disadvantages of electromagnetic flow meter.

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

List advantages and disadvantages of MEMS.

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

What are the disadvantages of Open loop control system?

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

State the advantages and disadvantages of hydroelectric power plant.

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

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

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

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

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

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

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

Write any two disadvantages of hydro power plant.

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

Write any two disadvantages of ammeter shunts.

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

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

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

Write advantages and disadvantages of positive and negative feedback.

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

The main disadvantages of having poor power factors are:

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

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

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

What are the advantages and disadvantages of automation?

Description : What are the advantages and disadvantages of automation?

0 answers

jihadio k jeeja · Answer 1 · 2017-12-06T20:25:35+0000

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

Neha8235 · Answer 2 · 2018-05-22T06:28:20+0000

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

what are the disadvantages of thyristor?

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