Questions tagged [igbt]

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

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69 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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53 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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24 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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46 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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49 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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82 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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46 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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96 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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62 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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60 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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39 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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35 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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40 views

IGBT modelling from datasheet

how to model igbt from the APT150GN120J datasheet. ...
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50 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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61 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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44 views

IGBT(Insulated-gate bipolar transistor) Latch-up

What will happen if the Parasitic transistor turn on?
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39 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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64 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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42 views

220V IGBT welder model ZX7 inverter welder has no earth case ground

I would like to add an earth case ground to the unit. I am unsure where to connect the wire. One end to the earth pin on the connector but where inside the unit? Some of these are manufactured with a ...
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1answer
92 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
102 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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43 views

Advantages and disadvantages of using igbt module with integrated rectifier bridge

What would be the main problems of using an igbt module with a rectifier bridge in an ac-ac converter project? Noise? Temperature? Does separating the rectifier bridge from the full bridge really ...
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58 views

Basics of high voltage DC motor driver with IGBT

I'm trying to drive 140V 4.5kW brushed DC pancake motor. I have to change motor speed and direction. All drive actions must be very smooth and sensitive. I drew a simple 4 quadrant IGBT controlled ...
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30 views

Passive-ish isolated IGBT driver with PWM design review

I would appreciate if anyone could give me some critique of my design proposal, is there any way it could be improved e.g. increased di/dt and dv/dt, sharper and more uniform gate signals? I am aware ...
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16 views

Calculation of Rated Power for IGBT Module

For an IGBT module with the following characteristics, how can we calculate the rated power? I mean how much is the rated power for this module?
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153 views

Ferrite core StepUP Transformer Design

So, I want to make a High-Frequency Ferrite transformer that can convert my 150-volt peak Square wave into 100000 Volt Peak. I am using UUR6440 Ferrite Core. Material is CF139 https://www....
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1answer
30 views

BLDC motor, typical maximum isolation voltage in DC

For one of 1/3 or 1/2 hp, can I aply a instantaneous 400VDC on it together with PWM (of around 50-200hz), safely? Do commom BLDC motors cumply with that spec?
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102 views

Choosing emitter resistor

I`m not sure if this is the right place to ask but: I have fried ignition circiut which is based on IGBT. I narrowed that the transistor is gone along with the emitter resistor. The datasheet for the ...
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1answer
70 views

Assymmetrical vs symmetrical voltage blocking

I'm studing power electronics. There is property for BJT, GTO, IGBT which says: "blocks voltage symmetricaly" or "blocks voltage asymmetricaly" What does it mean? What is the ...
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1answer
65 views

How this voltage resonant soft-switching IGBT works?

In this voltage resonant soft-switching IGBT: 1) When IGBT turns off, what is the reason why Vce slowly(sinusoidally) increases after current turns off? Was it because the stored voltage in L1 is ...
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213 views

Half Bridge Bootstrap configuration using IR2184 Gate Driver

I am planning on building a half bridge inverter for use as a tesla coil driver, using a couple of IGBTs, with gates driven by an IR2184 half bridge gate driver. According to the data-sheet, the ...
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83 views

How soft-switching works in these circuit?

I read that one of the major power losses of an IGBT circuit is its switching losses.In order to overcome it, soft-switching is used. The book gave an example with the circuit diagram: This is know ...
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49 views

High voltage, high current variable

I managed to make variable voltage and current for dummy load using IGBT with PWM control from Arduino, I plan to use the output as a variable power supply. The output from IGBT is a square wave so I ...
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1answer
56 views

Why are inverter modules extremely oversized in VFDs?

I was checking a faulty Schneider VFD (ATV312H037N4) which is rated for a nominal output current of 1.5 A. Turns out the rectifier bridge of the inverter module (FP10R12YT3) blew up and after reading ...
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49 views

IGBT gate resistance and power loss calculation homework

this is the question below What is meant by gate drive voltage and how does it affect my calculation? Also, how do I go about this problem after drawing the equivalent circuit? I don’t know which ...
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1answer
53 views

HV capacitor switch

I have in hand a 220V:600V isolated transformer and a HV bridge rectifier and I'd like to charge a 250uF capacitor with adjustable voltage from 200V to 500V. My idea is to use a switch between the ...
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1answer
44 views

How can this high-side IGBT drive work without exceeding maximum Vg-e

I was reading an article that creates a device that model the I-V curve using on capacitive loads. In the article they using IGBTs to charge and discharge the capacitor. This is the circtuit that ...
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125 views

Unknown logo on FGS25N120ANTD IGBTs. Which semiconductor manufacturer is this?

I bought 5 FGS25N120ANTD IGBTs from my local vendor a while back. I was unable to identify the manufacturer, based on the logo. Can somebody help me out?
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96 views

Electric board clicks and the output VDC is higher than the input AC

I've been working on fixing my treadmill's electric board in the past 2 weeks, and I learned a lot about electronics through this process. But for sorry I can't get it working, yet. I'm providing here ...
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1answer
60 views

How to find out the maximum Ampere that an IGBT can withstand [closed]

I want to replace an IGBT on my board with a new one. But when I Googled the old one (G40N60 UFD C13AK), I couldn't find its Datasheet to find out its maximum Ampere. Is there another way to find its ...
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263 views

IGBT won't turn off

I have built the following circuit as a static AC switch (no high frequency switching). The IGBT is a dual common-emitter module (https://www.infineon.com/dgdl/Infineon-FF300R12KT3_E-DS-v02_00-en_de....
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180 views

IGBT gate driver burned, why?

I am trying to use an IGBT module (dual IGBTs in common-emitter arrangement) as a static switch for 120VAC. I've done as much reading as I can, and I understand there are issues with losses and turn-...
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1answer
87 views

Replacing a shorted IGBT [closed]

Introduction to the problem While I'm using my treadmill, the house fuse breaker went down (Shorted). After I lifted up the fuse breaker & tried to use the treadmill, it showed me Err 02. My steps ...
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105 views

Will this IGBT switch operate correctly?

I am working to design a static AC switch using an IGBT module. The idea is that the switch will protect an inductive load from an adverse voltage condition (such as excessive under or over voltage) ...
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1answer
370 views

IGBT emitter collector spike overshoot

I am building a step up transformer for an output of 100 kV, 50 mA, at 50 kHz. simulate this circuit – Schematic created using CircuitLab For that I have planned to use a half bridge circuit ...
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204 views

Verifying maximum switching frequency calculation of a hard switching IGBT

I have recently been working on a power H-Bridge meant to drive an inductive load in hard switching mode. I calculated the maximum operating frequency limitation due to maximum power dissipation of ...
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115 views

Eon and Eoff IGBT losses

I have read several documentations about switching losses in IGBT. Most of documents indicates to use Eon and Eoff curves to calcul the switching losses through the IGBT. Nevertheless, the Eon and ...
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26 views

Determining the worst case VCEsat

I would like to determine what is the worst case VCEsat at a certain collector current and a certain gate emmitter voltage of an IGBT. So I have to do a linear interpolation of the worst case output ...
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1answer
252 views

Reverse blocking IGBTs no longer available, why?

I've been looking at IGBTs for a power project. Primarily since they can handle high voltage and have decent reverse blocking capabilities. Two devices I'm familiar with are Punch Through (PT) and Non-...
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162 views

What is the use of the diode connected anti parallel to the gate resistance in the general MOSFET/IGBT gate driver circuit?

From my limited knowledge, the only advantage of providing a parallel path through diode with a lower resistance across the main gate resistance is the high speed turn off of the power electronic ...

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