What is Igbt: Definition and 19 Discussions

An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch, which, as it was developed, came to combine high efficiency and fast switching. It consists of four alternating layers (P–N–P–N) that are controlled by a metal–oxide–semiconductor (MOS) gate structure.
Although the structure of the IGBT is topologically the same as a thyristor with a "MOS" gate (MOS-gate thyristor), the thyristor action is completely suppressed, and only the transistor action is permitted in the entire device operation range. It is used in switching power supplies in high-power applications: variable-frequency drives (VFDs), electric cars, trains, variable-speed refrigerators, lamp ballasts, arc-welding machines, and air conditioners.
Since it is designed to turn on and off rapidly, the IGBT can synthesize complex waveforms with pulse-width modulation and low-pass filters, so it is also used in switching amplifiers in sound systems and industrial control systems. In switching applications modern devices feature pulse repetition rates well into the ultrasonic-range frequencies, which are at least ten times higher than audio frequencies handled by the device when used as an analog audio amplifier. As of 2010, the IGBT is the second most widely used power transistor, after the power MOSFET.

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  1. mohammadmaaz789

    Understanding Dead Time Compensations in Electric Machine Drives

    https://i.stack.imgur.com/hSOU2.png https://i.stack.imgur.com/wE2Iy.png https://i.stack.imgur.com/R7FKK.png cannot understand this deadtime compensation method. So I have provided the whole cut out of the section of this book. BOOK: Control of Electric Machine Drive Systems Book by Seung-Ki...
  2. Z

    Si IGBT and SiC MOSFET comparison

    I am trying to understand the difference between an Si IGBT and SiC MOSFET. The device structure in question is the following: https://www.researchgate.net/figure/Comparison-between-Si-IGBT-and-SiC-MOSFET-modules-a-Cross-section-of-Trench-FS-Si-IGBT_fig6_318908365 It's hard to understand why...
  3. T

    Advantages of IGBT over MOSFET

    Apologies upfront, I have a backlog of PF threads I have created not replied to...I will endeavour to do so when I can. So I've read that IGBTs are more efficient than MOSFETs for lower than 20kHz frequencies (and are capable of use for high voltage rating and better performance than ordinary...
  4. J

    Enlighten me about the differences of IGBT and MOSFET please

    Hello guys, Can anybody explain the differences of IGBTs and MOSFETs? Yesterday I found an article entitled What is the Difference Between MOSFET and IGBT (http://www.apogeeweb.net/article/66.html), which theoretically explained this question to a certain degree, but still i want to ask you...
  5. Rx7man

    How to choose transistor types

    I'm working on a few little 12VDC projects, and am wondering on the logic for choosing different types of transistors... Bipolar vs IGBT vs Mosfet... What makes one of them a clear choice in each application? I can see bipolar transistors would be ideally suited for for analog/linear...
  6. nothing909

    IGBT gate resistor for switching application

    Homework Statement I have a 560 ohm gate resistor on an IGBT. Usually an IGBT doesn't require a gate resistor as it already has a high impedance of its own, but I'm told that for switching applications a gate resistor can be beneficial. The attempt at a solution If there is a gate resistor...
  7. nothing909

    Calculating resistor for IGBT and choosing flyback diode

    Homework Statement On the circuit I've drawn up, how do I calculate a current limiting resistor for the gate of the IGBT? The IGBT being used is a stgp6nc60hd. Also, how would I go about choosing a flyback diode for the motor?
  8. Robertphysics

    IGBT Maximum Ratings and Protection Considerations in SMPS Designs

    I’ve been wondering about the capabilities of IGBT and Mosfets in general , I recently had a few problems with an smps and here is what I wonder , for example the IGBT used in the supply has an absolute maximum rating of 600v and 120 amps at room temp, I can’t recall the exact IGBT in question...
  9. J

    Subharmonic noise in DC-AC H-bridge Inverter

    I have a design for a DC-AC full H-bridge inverter implemented with IGBTs that is functioning quite well, but there is one problem that I am having trouble solving. I am seeing spikes in the FFT of the output noise floor that appear to be subharmonics of the PWM frequency. I am measuring the...
  10. O

    Troubleshooting my IGBT: Vge not Meeting Design Requirement

    currently i need to turn on my IGBT. i measured Vge, it shown 8.25V, but my design requirement of Vge is 15V. i did some research, do i need to add in parasitic capacitances to my IGBT??
  11. T

    Gate drivers for IGBT inverter: How to isolate V supplies?

    This video describes my issue pretty well (I have it set to start when he talks about my specific situation): ETA: looks like the board doesn't allow the video to start at the specific time, the important stuff begins around 5:30 Our applications are a bit different as his design is for...
  12. B

    Solving IGBT Turn On Issue: Increase Vge from 10V to 15V

    i have trouble to ON IGBT.. to turn on the IGBT, it needed the Driver to turn it on.. pwm pump in 5V into the driver signal. I supply 10v to power up the driver chip. My design requirement to turn on the IGBT Vge is 15v... how to increase the Vge. i have attached the circuit that i using.
  13. B

    Losses in Power Devices (IGBT)

    In power device, there will be losses.. my device is SiC IGBT. i know how to find Toff = toff + tf base on datesheet.. but i don't know how to find Ton = doff +tr. http://ixapps.ixys.com/DataSheet/DS100140A_IXGH48N60B3C1.pdf can someone guide me along..
  14. 1rel

    Electromagnet control circuit

    Recently, I was trying to control the strength of an electromagnet with PWM over a MOSFET or IGBT with an Arduino/microcontroller. It worked but I burnt multiple MOSFETs/IGBTs while testing it, after certain time... so something must have gone wrong... I'd like to build a simple circuit, to...
  15. G

    Article that Explains IGBT well

    Hi, I'm an undergraduate EE major and am having trouble understanding IGBT. I understand the basic principle, a PNP transistor in ? (forgot the name) configuration with a MOSFET with a parasitic NPN transistor. I understand that it's a 4 layered device. I however think I would struggle trying...
  16. J

    Need help for IGBT parameter in PSIM

    hello I am jagodzziski from poland i would like to ask u about PSIM software actually I am doing single phase SPWM inveter voutput 12V 50HZ .. may i know what parameter for igbt and may u show me the calcultion tq
  17. L

    PWM and IGBT for 200V bulb dimmer

    Greetings! This is my first thread. I am creating a 200V bulb dimmer using PWM and IGBT. Currently, this is how I connect the components: The output of the PWM goes into the gate of IGBT. The bulb connects in series with the 220V supply and the collector of IGBT. The emitter of IGBT is...
  18. M

    Explain the basic concept of IGBT inverter ?

    Hi friends is there anything that can explain the basic concept of IGBT inverter for ac motor drives..? Help me please... Hery
  19. C

    IGBT + T8 Fluorescent + Simple Ballast = Headache

    [SOLVED] IGBT + T8 Fluorescent + Simple Ballast = Headache My first post! Hopefully first of many. So my story is this, I started this job not too long ago fresh out of school and there are literally no EE's around to actually give me guidance. As a result I'm forced to make just such a...