Questions tagged [igbt]

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

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29 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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27 views

IGBT Power losses and thermal resistance

I just want to make sure if my method is right or wrong and have some questions about it. I want to calculate power losses and thermal resistance of IGBT module in PWM applications and all parameters ...
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54 views

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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1answer
30 views

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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31 views

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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1answer
63 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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52 views

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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1answer
56 views

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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2answers
67 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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59 views

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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1answer
58 views

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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43 views

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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113 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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3answers
183 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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2answers
60 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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68 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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1answer
36 views

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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0answers
100 views

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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48 views

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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1answer
114 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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85 views

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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1answer
60 views

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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38 views

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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1answer
77 views

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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71 views

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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1answer
19 views

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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2answers
158 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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4answers
563 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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1answer
127 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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1answer
82 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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126 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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114 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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61 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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1answer
96 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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79 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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1answer
85 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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2answers
241 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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3answers
108 views

Limit start current of high power motor

I'm working on a project that is clearly showing me that power electronics is a completely different beast. We have a 5HP motor running on a 120Vdc battery. The motor is installed about 100ft (30m), ...
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1answer
368 views

How to make IGBT/MOSFET gate driver circuit (5-10V) using push pull with transistors

I was trying to drive the gate of 25N120 IGBT (2800pF gate capacitance) with the help of transistors. The working voltage is 10V. I have tried with BC548 NPN and BC558 PNP. Everytime I apply PWM, the ...
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2answers
178 views

Half H-Bridge using IR2104 doesn't work

I'm trying to build a half H-bridge using an IR2104 driver. I want to use it for driving "high power" things such as a brushless motor (100V, 40A), or high power LED (200W). But it doesn't ...
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1answer
62 views

Junction temperature calculation

I have a question regarding the calculation of the junction temperature of MOSFETs and IGBTs. An estimation is possible with: $$T_j = P \times R_{th} + T_a$$ Let us assume that the thermal resistance (...
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37 views

What resistor to use on IGBT

I am planing to use FGH40N60SFD (here's datasheet) IGBT transistor as a switch (to connect / disconnect from battery 12V up to 5A). How should I choose resistor to connect to gate? I will be using 5V ...
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61 views

IGBT modelling from datasheet

how to model igbt from the APT150GN120J datasheet. ...
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0answers
59 views

IGBT excessive Vge

I have a circuit with a PWM signal controlling the gate of an IGBT. It's a dual IGBT module, SKM150GB12. A relay delivers voltage to the collector, 2, and the power is delivered to a battery, Vbat+ on ...
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293 views

Perfect AC sinusoidal wave dimmer with PWM from micro-controller

I am designing a circuit for controlling speed of a AC fan using Arduino UNO, this is how the circuit looks like . In this circuit the waveform generated for load is not perfectly sinusoidal,what i ...
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1answer
253 views

IGBT(Insulated-gate bipolar transistor) Latch-up

What will happen if the Parasitic transistor turn on?
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1answer
40 views

Why didn't the IGBT's output voltage change?

I have a lab experiment and we are trying to make IGBTs switch. Here is our experiment: In first situation, our values like that: 10kHz, 10V pulse Vcc = 15V Frequency=10k And with this setup, I can ...
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1answer
180 views

What are the important specs to look after for IGBT replacement?

I have a MC2100ELS-18W motor controller and after inspection found that the IGBT is shorted, the part number is IRGPC40K I suppose this is a discontinued part and I do not want to buy from China and ...
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1answer
112 views

What is the explanation of non-zero VCE voltage of an IGBT while its gate is high?

While investigating a malfunctioning high power induction heater system (which constantly destroys its IGBT modules), I came across an interesting situation. Circuit Gate drivers are SKYPER 32 PRO R ...
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1answer
112 views

Rectifier circuit with unexpected output

I am developing a circuit using Proteus 8. My aim is to get a full wave (discrete) sine output to the load. I use an IGBT to switch the full wave rectified signal and get output in pulse form (purple ...

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