Questions tagged [igbt]

Insulated-gate bipolar transistor, voltage-driven power transistor with fast switching times

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Bi-directional current source based on MOSFET or IGBT

I am studying a bi-directional current source based on precision difference amplifiers and the MOSFETs, which is described on the website https://www.edn.com/simple-precise-bi-directional-current-...
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MOSFET Driver input frequency

Can I send pulse 1us (1Mhz) to VOD3120AB Mosfet Driver?
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2 answers
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How to implement the design of a bidirectional buck-boost converter?

I need your help in designing a bidirectional buck boost converter with the following requirements: Input voltage: 100V-400V Voltage range: 250V-1.2kV Output current: 40-80A Power dissipation of 24 ...
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If an IGBT's collector-emitter max voltage is 600 V, Do I need 1 kV rated capacitors on the output side?

I'm fixing this solar PV diverter (pictures attached at the bottom of this post), other than the traces it has a blown IGBT and 2 capacitors. The datasheet for the IGBT (model FGH40T65SPD) is here:  ...
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1 answer
55 views

Why did my IGBT die? What did I do wrong?

I was doing some experiments using the following IGBT: https://www.pollin.de/productdownloads/D130905D.PDF I used it to drive a load of ~4.7ish Ohm and ~140ish µH from a capacitor bank of 2350µF. Each ...
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Power supply design requirements for IGBT driver

I'm trying to determine the proper power supply type and output current requirement to drive a three phase IGBT driver (this is a follow up to a previous question I asked, although focused on a ...
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IGBT operation failure at high current

I tried to use IGBT (skm400ga-12t4) to do fast current switching of circuits with an inductor. The gate driver used adum4121-ARIZ and gate driving was performed by making a same circuit to the example ...
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IGBT driver IC TCC4421 getting hot when connected to IGBT gate through a toroidal transformer

A strange overheating problem: A TL494 PWM controller pulsating a TC4421 buffer IC, which is connected through a series 0.47uf capacitor to the primary of a toroidal transformer. The secondary is ...
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Can I drive only one MOSFET/IGBT in a DC chopper circuit using IR2112 driver?

I have a three phase inverter that is driven with 3 IR2112 drivers board and microcontroller. I want to take advantage of the board and take two wires from these drivers pins to trigger one MOSFET/...
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81 views

Component selection for IGBT desaturation detection

I am designing a circuit for driving a DC motor, and want to include overload protection, for that I found that detecting desaturation is a good option to detect high current flow. I sketched the ...
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Selecting a Gate driver for IGBT

I have trouble choosing an IGBT gate driver for PMSM motor control application. Can someone help me with the procedure? I went through few papers and I'm stuck with finding the external and internal ...
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IGBT conduction loss

I want to calculate heat sink thermal resistance of IGBT using parameters from a Datasheet. To do that, I have to calculate the total power loss first. It is conduction loss + switching loss. To ...
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Replacing Generic IGBT with CoPack IGBT

The IGBT of my induction cooker recently blown up and I have found it's FGA20S125P which is a 1250V 20A Shorted anode type IGBT. The datasheet is available here. However I couldn't find this IGBT ...
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Why are my IGBTs failing?

I am testing this H-Bridge circuit for driving a DC motor. The Vdrive signal is a full wave rectified \$220 V_{RMS}\$, and I am using a PWM signal in the SD net to control the final voltage. The motor ...
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1 answer
71 views

Designing IGBT driver: question about datasheet specs

Summary I'm trying to design a driver for a high voltage, IGBT driver, using an optocoupler for isolation, and have a question about whether this design is compatible with some of the numbers in the ...
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Two switch forward converter - replacing BJTs for IGBTs in welder

So my friend has a broken TIG welder, an Lorch IT 250 GW to be specific. It's quite old, water cooled, has 250A continuous welding current and is powered by 3x230V mains. It was sitting for about a ...
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Troubleshooting Skyper 32Pro R + Adapter Board 1 Skyper 32Pro R

Hello I am trying to test an IGBT SKM145GB066D with the Adapter Board 1 Skyper 32Pro R and gate driver Skyper 32 Pro R, but cannot make it work. I've spend 2 weeks trying, but it seems like some ...
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Series IGBT connection problem that the second igbt is always on

I'm tring to make fast turn-on circuit, so I use boosting P/S with 19V. And main P/S is 2V with 5A. The circuit is as follows. IGBT is connected by series, and gate-emitter voltages apply square ...
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2 answers
78 views

Ringing across IGBT with Infineon driver IC

I am testing the 1ED3123MC12H driver IC with an IKW15N120BH6 IGBT in a buck converter circuit. Vdc=30V, 0.6mH and Fsw=10 kHz. Ringing is creating a problem. How can I fix the ringing?
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Will High Side IGBT Driver work with high ripple power supply?

The Vdrive voltage in the below circuit is supplied from rectified mains, including filter caps. The problem is that filter caps for this kind of application get expensive really fast, so I am ...
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1 answer
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Which terminals are collector, emitter, and gate on this IGBT?

I am new to IGBTs. I want to experiment with them. I got this older IGBT but unfortunately have no data on it (and all the data I find on the web is fake by resellers.) How do I know which is gate, ...
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2 answers
74 views

Energy in forward state IGBT

What is the formula to find Ef for an IGBT? Can I calculate it from datasheet parameters? E is for energy dissipation and I found the graph from here: https://www.researchgate.net/post/How-can-I-...
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IGBT and a high voltage circuit

I have never built such a system before and have already made several mistakes. I ask for help in drawing it up correctly so that it can start working. I intend to control the power supply to coil L1 ...
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1 answer
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IGBT Turn-on switching energy loss

I found this formula to calculate \$E_{\text{on}}\$ for an IGBT: $$E_{\text{on}} = \int\limits_{t_1}^{t_2}p_v(t)\text{ d}t = \int\limits_{t_1}^{t_2}v_{CE}(t) \times i_C(t)\text{ d}t$$ How can I ...
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Input impedance of IGBT and power MOSFET

Between IGBTs and power MOSFETs, which has greater input impedance/resistance? (This is a question I was asked during an interview.)
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4 votes
2 answers
116 views

What does the cross point of V-I curves mean?

Here you see a V-I graph including many curves achieved under different junction temperatures of an IGBT. As it can be seen there is a cross point where all curves intersect each other. Does it make ...
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3 answers
218 views

IGBT won't open in spark circuit

I'm building a EDM machine for removing broken metal-working taps. I'm using the following circuit, but having issues with the IGBT transistor ...
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2 answers
74 views

How to make considerations when connecting MCU to IGBT which has Logic Level Gate Drive?

I will use MCU that has 5V output that should connect to ISL9V5036S3ST IGBT. IGBT will drive ignition coil that has 0.8 Ohm resistance connected to 12V (+/- 3V) power supply. IGBT will be on the low ...
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-1 votes
1 answer
72 views

MOSFET/IGBT identification

I was repairing the PCB of my Refrigerator and found that IGBT/MOSFET was not giving output. I tried to search it but couldn't found the part. Please Help me in finding this part online.
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1 answer
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Collector current in datasheet Graphs

Here is an example of output characteristics fot IGBT devices, i.e., the "collector current (Ic)-to-collector emitter voltage (Vce)" graph. Can somebody help me find what Ic represents here? ...
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Calculate switching frequency of an IGBT

This might be an elementary question - how can I determine the switching frequency of an IGBT e.g. IXGH15N120B? Will this IGBT be suitable for a switching frequency up to 250 kHz?
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How to model switching losses in transistors in Simulink

I'm trying to model the switching losses of an IGBT in Simulink. I've researched however I can't find any literature on how to actually just model the switching losses? I was potentially thinking ...
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1 answer
202 views

How to drive 180v DC motor connected to mains?

I have a brushed dc treadmill motor, and I'm trying to understand the motor controller board circuit. The board is converting 220v ac signal with just a bridge rectifier and driving the motor with an ...
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Are there any mistakes in the circuit which would cause overheating and damage to IR2110 driver IC?

I’m designing a sine wave inverter. I bought 4 IR2110 ICs from local shop. All of them draws excess current and starts to overheat when I connect Vdd and Vss to 5v supply and Ground respectively. ...
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1 answer
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Diagnostics of the IGBT transistors in the three phase inverter

Let's say I have three phase voltage source inverter i.e. following circuit I have a suspicion that one or more IGBTs are damaged. To confirm this hypothesis I have decided to use multimeter in ...
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Things/any reference to consider for safety to use the voltage ADC info from 3 IGBT bridges in the control loop?

Is there any mode apart from the short circuit and normal mode, that I need to check for the control loop to be executed by the micro controller?
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Does the length of differential probes matter? Are we possibly measuring something that is not really occurring in the circuit?

So we're measuring waveforms across certain terminals of an IGBT and noticed that when we extend cables of our differential probes (by about 1.2 meters/4 feet), ringing occurs and we are worried it ...
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IGBT C-E waveform

I am testing a full bridge converter, consisting of four IGBTs. I encountered a strange behaviour, when I load the bridge with an inductive load, in the C-E voltage waveform there is some kind of a ...
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1 answer
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IGBT VCEsat maximum rating dependence on VGE

Building an application with IGBTs up to 1000V and using IXGA20N120A3 rated at 1200V. However datasheet states that this rating is for a Vge = 0V. We are driving the IGBT with -12V during turn off to ...
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2 answers
213 views

IGBT failure and circuit explosion

I have a circuit with IGBTs which charges and discharges two different capacitor lines as a function of the voltage. i.e. when a voltage is detected below 160V, Q1 charges C1 and when a voltage over ...
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3 votes
4 answers
790 views

Rdson of this IGBT?

I want to estimate the power dissipation of this IGBT SGL160N60UFD but I can't find any Rdson, I leave the datasheet: https://datasheetz.com/data/Discrete%20Semiconductor%20Products/IGBTs%20-%20Single/...
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-1 votes
1 answer
167 views

How can I correct this IGBT problem?

Why doesn't my IGBT module work? I shared my Multisim file as a download google drive file. Can you solve the IGBT problem? IGBT strangely doesn't work. The emitter voltage is only 12V. I expected it ...
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-1 votes
1 answer
100 views

IGBT not switching on with a diode in connection

Hi, I am trying to switch on/off a IGBT (CM1000HA-28H) to control a current. The IGBT is driven by a driver board (Powerex BG1A board). A problem we encounter is that if a diode (SD600) is connected ...
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253 views

IGBT half bridge inverter not giving correct output

I am making a half-bridge square wave inverter using IGBTs (GW20NC60VD) and gate driver HCPL 3120. The input signal for the gate driver IC is taken from an Arduino. The signal is of 60KHz frequency. A ...
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175 views

IGBT trailing edge dimmer: the LED bulb only lights up around 40%, strange wave form before that, please advise what is causing that

I built a trailing edge dimmer with IGBT, and I am driving it using Raspberry Pi 3. The circuit mostly works, but I noticed some strange behavior, that I can't put my finger on. Please could you help ...
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78 views

Dimmig universal motor speed control IGBT or Triac?

I want to control speed of 220VAC universal motor (Grinder) using Microcontroller, which method is better in comparison?? Using Triac which zero-crossing detection and control pulse generation for ...
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1 answer
168 views

IGBT vs MOSFET inverter (which is better)?

I am developing a full-bridge inverter with a working frequency of 100 kHz. I am confused about whether to use IGBTs or MOSFETs. The inverter is to output a 40V square wave signal. I have previously ...
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0 answers
109 views

What causes a three terminal short circuit failure in IGBT

A pair of IGBTs that I was using in a high frequency application failed with 3 terminal short. The devices are rated 650V that's well higher than the operated voltage of 200 V. Snubbers were working ...
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1 answer
91 views

What are the possible disadvantages of using this PNP transistor?

I read this application note from Fairchild Semiconductors, and was wondering about what the possible disadvantages could be if a PNP transistor is used to bypass the Miller current as shown in the ...
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2 answers
377 views

Grounding Ignition Coil Using IGBT ckt....Not Working + Can't Understand?

I am a hobbyst, and recently been working on a small project of my own, Creating a rev limiter of my own. Following is my circuit which will explain a lot about what I am trying to do. First of all ...
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