why igbt is used in vfd?

98 views
by

1 Answer

Answer :

 IGBT or Insulated Gate Bi-polar Transistors are typically semiconductor devices aka.  controlled switches,  which find their applications in Power Electronics circuits such as Inverters, and electrical drives.

IGBTs are used for higher power ratings where as Power MOSFETs are used for lower power ratings in an electrical drive circuit.

The use of IGBTs in a VFD (Variable Frequency Drive) offers the following advantages :

* High speed switching 

* Low power loss hence highly efficient 

* Self commuting ( Does not require turn off circuits)

* Simple and easy to control ( buy implementing suitable Pulse Width Modulation scheme )

* Lower cost 

Like 0 like
by

Please log in or register to answer this question.

Related questions

76 views
What is the difference between a soft start and a VFD?

Description : What is the difference between a soft start and a VFD?

0 answers
99 views
Advantages of Variable Frequency Drive (VFD)

Description : Advantages of Variable Frequency Drive (VFD)

Last Answer : Advantages of Variable Frequency Drive (VFD)

2 answers
256 views
Describe with neat sketch the constructional details of IGBT.

Description : Describe with neat sketch the constructional details of IGBT.

Last 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.

1 answer
366 views
Draw construction of IGBT.

Description : Draw construction of IGBT.

Last Answer : construction of IGBT

1 answer
3.2k views
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ?

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

Last 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

1 answer
458 views
Compare BJT, MOSFET and IGBT .

Description : Compare BJT, MOSFET and IGBT .

Last 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.

1 answer
144 views
why IGBT is preferred as a power switch over both power BJT and MOSFET?

Last Answer : Because it has a higher switching frequency and heat tolerance.

1 answer
3.0k views
Justify the statement. IGBT uses a vertically oriented structure.

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.

Last 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.

1 answer
225 views
explain the parallel operation of IGBT?

Description : Also, highlight the problem faced during parallel operation.

Last 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.

1 answer
223 views
is igbt current controlled device ?

Last 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.

1 answer
329 views
igbt is unipolar or bipolar?

Last Answer : IGBT is a bipolar device.

1 answer
141 views
why igbt is bipolar?

Last Answer : IGBT is a bipolar device because current is carried by both holes and electrons.

1 answer
147 views
why igbt is used instead of bjt and mosfet?

Last Answer : ON state losses of IGBT is less as compared to MOSFET and BJT.

1 answer
73 views
Give the applications of IGBT

Description : Give the applications of IGBT

Last Answer : 1) AC and DC motor drives 2) SMPS 3) Inverters 4) Choppers 5) Solid-state Relays 6) solid-state Contactors

1 answer
84 views
The number of terminals present in IGBT is

Description : The number of terminals present in IGBT is A) 2 B) 3 C) 4 D) 5

Last Answer : The number of terminals present in IGBT is 3

1 answer
2.6k views
is IGBT costlier than BJT and MOSFET?

Last Answer : Yes IGBT is costlier than BJT and MOSFET.

1 answer
210 views
what is variable frequency drive ?

Description : what is variable frequency drive ?

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%; }

2 answers
0 views
Would you recommend putting a VFD on a fire pump?

Description : Would you recommend putting a VFD on a fire pump?

Last Answer : I would not prefer to implement VFD with fire pump considering below points; Fire system is not continuously operating system, it is operated on occasional basis, just for operational testing or in case ... you may look for VFD option to eliminate PRVs, but compare your investment costs first..!!

1 answer
0 views
How VFD works in an electric car?

Description : How VFD works in an electric car?

Last Answer : The variable frequency drive (VFD) can control both the speed and torque of a squirrel cage induction motor by varying the motor input frequency and voltage. The fundamentals components of a VFD system are an electric motor, modulator and controller.

1 answer
4 views
IGBT is a voltage controlled device. Why?

Description : IGBT is a voltage controlled device. Why?

Last Answer : Because the controlling parameter is gate-emitter voltage.

1 answer
4 views
Why IGBT is very popular nowadays?

Description : Why IGBT is very popular nowadays?

Last Answer : a. Lower hEAT requirements b. Lower switching losses c. Smaller snubber circuit requirements

1 answer
8 views
What are the various parameters we have to consider, while selecting IGBT?

Description : What are the various parameters we have to consider, while selecting IGBT?

Last Answer : In IGBT datasheet, we have to focus on following parameters Collector to emitter voltage VCESCollector Current ICCollector Dissipation PCJunction Temperature Tj

1 answer
5 views
For High frequency applications will you prefer MOSFET or IGBT? Why?

Description : For High frequency applications will you prefer MOSFET or IGBT? Why?

Last Answer : For High frequency applications, MOSFET is the right choice of the device.Because MOSFET has low switching losses compare to that of IGBT.General rule of thumb is for low-frequency applications ... For high frequency applications having frequency range of more than 200kHz, we have to use MOSFET

1 answer
6 views
For High voltage applications will you prefer MOSFET or IGBT?

Description : For High voltage applications will you prefer MOSFET or IGBT?

Last Answer : For High voltage applications we have to use IGBT. Because MOSFETs are low voltage devices. ie, Their voltage rating is lesser than IGBT. General rule is MOSFETs are suitable for applications ... voltage less than 250V. The IGBTs are suitable for applications which has breakdown voltage upto 1000V.

1 answer
8 views
A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT

Description : A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT

Last Answer : Ans: BJT and MOSFET

1 answer
28 views
IGBT uses

Description : IGBT uses IGBT uses

Last 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.

1 answer
18 views
IGBT V-I characteristics

Description : IGBT V-I characteristics

0 answers
22 views
IGBT working principle

Description : IGBT working principle

0 answers
30 views
IGBT Construction

Description : IGBT Construction

0 answers
369 views
What is IGBT?

Description : What is IGBT (Insulated Gate Bipolar Transistor) ?

Last 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.

2 answers
306 views
For IGBT, which of the following statement is true?

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- ... transistor (d) It combines voltage control features of MOSFET gate and high power capability of bipolar transistor

Last 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

1 answer
68 views
The requirement of the gate drive circuits for power MOSFET and IGBT is

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

0 answers
128 views
An IGBT has three terminals called

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  

0 answers
98 views
Consider the following statements in respect of important features of IGBT....

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 ... are correct?  A) P and Q B) P and R C) Q and R D) P, Q and R

0 answers
65 views
The switching time (in µS) of IGBT is in the range of...

Description : The switching time (in µS) of IGBT is in the range of  A) 20 B) 10 C) 2 D) 0.5

0 answers
76 views
IGBT is used as

Last Answer : IGBT is used as High frequency switching device.

1 answer
190 views
How IGBT convert DC into AC in solar inverter?

Last 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.

1 answer
...