Answer :
ON state losses of IGBT is less as compared to MOSFET and BJT.
asked
Sep 13, 2017
by
anonymous
Answer :
Because it has a higher switching frequency and heat tolerance.
asked
Sep 15, 2017
by
anonymous
Answer :
IGBT is a bipolar device because current is carried by both holes and electrons.
asked
Sep 13, 2017
by
anonymous
Description : What is the difference between a soft start and a VFD?
asked
Mar 15, 2018
by
anonymous
Description : Advantages of Variable Frequency Drive (VFD)
Answer :
Advantages of Variable Frequency Drive (VFD)
Description : Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown
Answer :
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown
asked
Apr 28, 2018
by
anonymous
Description : Describe with neat sketch the constructional details of IGBT.
Answer :
Construction: Insulated gate bipolar transistor or IGBT, is a solid state devices primarily used as an electronic switch which, as it was developed, came to combine high efficiency and fast ... layer and p+ emitter constitute a BJT with a wide base region and hence small current gain.
asked
May 21, 2020
by
anonymous
Description : Draw construction of IGBT.
Answer :
construction of IGBT
asked
Oct 13, 2019
by
anonymous
Description : Compare BJT, MOSFET and IGBT .
Answer :
BJT MOSFET IGBT BJT is a current controlled device. MOSFET is a voltage controlled device. IGBT is a voltage controlled device. The input impedance of BJT is low. ... is minority carrier device. MOSFET is majority carrier device. IGBT is minority carrier device.
asked
Nov 10, 2017
by
anonymous
Description : Justify the statements. 1. IGBT uses a vertically oriented structure. 2. IGBT is preferred as a power switch over both power BJT and MOSFET. 3. Punch through IGBT structure are more popular and are widely used.
Answer :
1. IGBT uses vertically oriented structure. IGBT use vertically oriented structure to reduce the resistance and to increase the current flow area. Hence IGBT uses vertically oriented ... DC circuit applications. Hence punch through IGBT structure are more popular and are widely used.
asked
Sep 15, 2017
by
anonymous
Description : Also, highlight the problem faced during parallel operation.
Answer :
Parallel operation of IGBT: Parallel operation of IGBT is done for obtaining high current rating. Paralleling of IGBT reduces conduction losses and thermal stress. IGBT combines the qualities of ... . IGBTs must share losses equally otherwise IGBT may get failure due to thermal differences.
asked
Sep 15, 2017
by
anonymous
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.
asked
Sep 13, 2017
by
anonymous
Answer :
IGBT is a bipolar device.
asked
Sep 13, 2017
by
anonymous
Description : The number of terminals present in IGBT is A) 2 B) 3 C) 4 D) 5
Answer :
The number of terminals present in IGBT is 3
asked
Jun 18, 2018
by
anonymous
Description : Give the applications of IGBT
Answer :
1) AC and DC motor drives 2) SMPS 3) Inverters 4) Choppers 5) Solid-state Relays 6) solid-state Contactors
asked
Oct 13, 2019
by
anonymous
Answer :
Yes IGBT is costlier than BJT and MOSFET.
asked
Sep 29, 2017
by
anonymous
Description : what is variable frequency drive ?
Answer :
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Answer :
Rectifier is use in power supply to convert Alternating current (AC) to Direct Current (DC) .
asked
Sep 13, 2017
by
anonymous
Answer :
MOSFET provides better efficiency at high frequency and its high speed switching losses are less hence MOSFET is used for high frequency.
asked
Sep 10, 2017
by
anonymous
Answer :
IGBT is used as High frequency switching device.
asked
Mar 29, 2018
by
anonymous
Description : Why thyristor are not preferred for inverter?
asked
Mar 19, 2018
by
anonymous
Description : Why SCR is called as thyristor?
asked
Mar 19, 2018
by
anonymous
Description : Why is pulse train gating preferred over pulse gating? Explain with relevant circuit and waveforms, the pulse train gating of SCRs.
asked
Mar 11, 2018
by
anonymous
Description : Why the power factor of semiconverter is better than full converter?
Answer :
Power factor of semiconverter is better than full converter
asked
Mar 8, 2018
by
anonymous
Description : parallel operation of MOSFET can be done more easily as compared to thyristor. why?
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.
asked
Dec 7, 2017
by
anonymous
Description : Explain the series and parallel operation of MOSFET. Which is suitable and why?
Answer :
Series operation of MOSFET: To increase voltage handling capability MOSFETs are connected in series. When the MOSFETs are connected in series each MOSFET should turn on and turn off ... on and turn off time and transconductance. Each MOSFET should share current equally.
asked
Sep 15, 2017
by
anonymous
Answer :
PN junction of zener diode is heavily doped than ordinary diode. For the occurrence of Zener effect the zener diode is heavily doped. If the zener diode is not heavily doped then Zener effect ... breakdown voltage is sharp. If the diode is lightly doped the diode will have higher breakdown voltage.
asked
Sep 13, 2017
by
anonymous
Answer :
already answered here is mosfet current controlled device?
asked
Sep 10, 2017
by
anonymous
Description : Consider the following statements in respect of important features of IGBT. P. It has high input impedance gate as that of a MOSFET Q. It has low ON state voltage drop as that of a BJT R. Turn-off time is significantly less than MOSFET Which of these statements are correct? A) P and Q B) P and R C) Q and R D) P, Q and R
Description : The switching time (in µS) of IGBT is in the range of A) 20 B) 10 C) 2 D) 0.5
asked
Apr 9, 2018
by
anonymous
Answer :
Igbt alone cant convert dc to ac. igbt half bridge or full bridge or three phase topology could be used to convert dc to ac. also igbt gates should be driven by microcontroller or pwm/spwm gate driving signals ... e4(-) and g4 c2e1 and c4e3 pins are AC output pins. its name is igbt inverter.
asked
Feb 24, 2018
by
Amit Sharma
Answer :
Yes it can be, and it will act like a normal PN junction diode. The characteristic of ZENER diode is exactly same as PN junction diode in forward Bias.
asked
Sep 13, 2017
by
anonymous
Answer :
Full wave bridge rectifier is used in mobile chqrger.
asked
Sep 13, 2017
by
anonymous
Description : IGBT uses IGBT uses
Answer :
Applications of IGBT: 1. The insulated gate bipolar transistor (IGBT) is used Ac and DC motor drivers. 2. The IGBT is used in unregulated power supply (UPS) system. 3. The IGBT is used to ... an isolated-gate FET for the control input and a bipolar power transistor as a switch in a single device.
asked
Jun 11, 2020
by
anonymous
Description : IGBT V-I characteristics
asked
Jun 11, 2020
by
anonymous
Description : IGBT working principle
asked
Jun 11, 2020
by
anonymous
Description : IGBT Construction
asked
Jun 11, 2020
by
anonymous
Description : What is IGBT (Insulated Gate Bipolar Transistor) ?
Answer :
As compare to BJT and MOSFET, IGBT have very low on state voltage drop. IGBT require low driving power. IGBT have wide SOA (Safe Operating Area). The current conduction capability of ... very useful for improving dynamic performance and efficiency. IGBT also very good in reducing audible noise.
asked
May 18, 2018
by
anonymous
Description : For IGBT, which of the following statement is true? (a) Switching speed of IGBT is more than bipolar transistor (b) IGBT is a current-controlled device (c) On-state collector-emitter voltage is less than that of bipolar junction transistor (d) It combines voltage control features of MOSFET gate and high power capability of bipolar transistor
Answer :
For IGBT, which of the following statement is true? (a) Switching speed of IGBT is more than bipolar transistor (b) IGBT is a current-controlled device (c) On-state collector- ... transistor (d) It combines voltage control features of MOSFET gate and high power capability of bipolar transistor
asked
May 15, 2018
by
anonymous
Description : The requirement of the gate drive circuits for power MOSFET and IGBT is (a) high source capability (b) high sink capability (c) both (a) and (b) (d) high voltage capability
asked
Apr 14, 2018
by
anonymous
Description : An IGBT has three terminals called (a) Collector, Emitter and Base (b) Drain, Source and Base (c) Drain, Source and Gate (d) Collector, Emitter and Gate
asked
Apr 10, 2018
by
anonymous
Description : 1. Why are the Fundamental Freedoms under Article 19 suspended during emergency? 2. Which acid is used in synthetic lemonade? 3. Economic Planning is a subject of which list? 4. What is the position of Indian Railways network in the world? 5. Who identified the name Sandrocottus as Chandragupta Maurya? 6. Central Arid Zone ... ? 19. Which river emerges from Amarkantak plateau in Madhya Pradesh? 20. 'The world is God and God is my soul' In which is the philosophy contained?
Answer :
Answer : 1. War or external aggression 2. Citric acid 3. Union List 4. Fourth 5. William Jones 6. Rajasthan 7. Gorilla 8. Limited government 9. Snow, forest, water 10. Dam 11. Zero 12. Dehradun ... 15. Babur and Rana Sanga 16. Skin 17. Estimates Committee 18. By Max Planck 19. Narmada 20. Upanishads
Description : 1. If the current in the core decreases, what will the strength of the magnetic field be? 2. What is the commonly used unit for measuring the speed of data transmission? 3. The Govt. of India does not provide any direct financial assistance to which scheme? 4. Why is fog common around Newfoundland coast? 5. ... has been reasonably satisfactory in connection? 19. Which river flows between the Vindhya and Satpura ranges? 20. Which was a journal brought out by Abul Kalam Azad ?
Answer :
Answer : 1. Decreases 2. Bits per second 3. Jeevan Sathi Yojana 4. Because warm and cold currents meet 5. Ranga II 6. Fatty tissue 7. Uttar Pradesh 8. Oil gas 9. Silvassa 10. Hunter 11. Sports ... 16. Speaker 17. Because of inadequate supply of air 18. Growth of GNP 19. Narmada 20. Al -Hilal
Description : 1. Hydraulic brakes' and Hydraulic lift' are devices, why are fluids used in them? 2. Which person won seven gold medals in swimming for the U.S. in the 1972 Olympic? 3. Which Agriculture export item is second in case of India? 4. Which lake in India has the highest water salinity? 5. Who organised Ashwamedha ... of India? 19. Kudremukh hills known for iron ore deposits is situated in which place? 20. Who was defeated at kannauj in the hands of Sher Shah in 1540?
Answer :
Answer : 1. For transmitting pressure 2. Mark Spitz 3. Rice 4. Sambhar 5. Samudragupta 6. Electric power generation 7. July, 1947 8. U-235 9. Rajasthan 10. Quran 11. Virender Sehwag 12. ... 16. Either House of Parliament 17. Radon gas 18. Shri V. T. Krishnamachari 19. Chickmaglur 20. Humayun
Description : 1. By which algae is Nitrogen fixation done? 2. Which post does the Constitution of India not mention? 3. When do all the magnetic materials lose their magnetic properties? 4. Why are the Canals in Western Europeare mainly used? 5. By whom was the Tahglq-i-Hind', a famous literary work, written? ... How the Constitution describes India? 19. The Himalayan mountain system belongs to which mountains? 20. During the reign of emperor was the artillery most perfect and numerous?
Answer :
Answer : 1. Blue-green algae 2. The Deputy Prime Minister 3. Strongly heated 4. For inland navigation 5. Alberuni 6. 5th June 7. Manipur 8. Analogous organs 9. Oxbow lake 10. Vallabhacharya 11 ... 17. Due to presence of Bacteriophages 18. As a Union of States 19. Fold mountains 20. Aurangzeb
Description : 1. Respiration can occur in the absence of oxygen in which thing? 2. How many times was the term of the Lok Sabha extended upto 6 years? 3. Optic fibres are mainly used for which purpose? 4. Asia has large areas of inland drainage. Why is it so ? 5. Pandit Jawaharlal Nehru was born in which year? 6. ... howmany States and Union Territories? 19. In which valley is the Himalayan pass Shipki La located? 20. Which Chola ruler converted the Bay of Bengal into a Chela lake'?
Answer :
Answer : 1. Yeast 2. Once 3. Communication 4. Rainfall is seasonal and scanty 5. 1889 6. Netherlands 7. ICICI Bank 8. Plasma lemma 9. Ivory coast 10. Ghaggar-Hakra 11. Estimates Committee 12. A protein 13. ... 15. At Daimabad 16. South Korea 17. E, coli 18. 14 and 6 19. Sutlej valley 20. Rajendra I
Description : Why layered architecture is used in OSI reference model? Discuss.
Answer :
The OSI reference model is as shown in the figure.There are seven layers in the model. Physical layer, Data link layer, Network layer, Transport layer, Session layer, Presentation layer, ... the entire package is converted to a form that can be transferred to the receiving machine.
Description : Why mercury is used in manometer?
Answer :
Following are the reasons due to which mercury is used in manometers :- i. Specific gravity of mercury is greater than the other liquids. ii. Mercury is immiscible with other liquids. iii. It does not stick to the surface in contact.
Description : Why duralumin sheets are used in making aeroplanes body?
Answer :
Duralumin sheets possess following properties: 1. Light in weight, tough. 2. Corrosion resistant. 3. Easily castable. 4. Strong as mild steel with good tensile strength. Because of these properties it is used in making aeroplanes body.
asked
Jun 30, 2020
by
anonymous