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Questions tagged [igbt]

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

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2answers
39 views

Isolated Power Supplies for Inverter Gate Drivers

I am using a 3-Phase IPM IGBT Inverter Module in motor driver. This module has built-in gate drivers which require 4 Isolated power supplies for their operation. In all I have to design 5 Isolated ...
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0answers
35 views

Estimating IGBT current density

An n channel NPT IGBT with a base width of \$0.101 mm\$ and doping \$10^{13} cm^{-3}\$ is to be trimmed to a maximum common base current gain of \$0.94\$. If the injected hole density at the edge of ...
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1answer
38 views

Intelligent IGBT Module for Motor drive [closed]

I am looking for IGBT module for motor drive.. Approx. 50A, 1200V rating. 7 Pack module, Including Inverter + Brake circuit + Built-in drivers For this I have found a module and it's datasheet ...
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1answer
77 views

high side driver failure

I am having 100% failure rate trying to get this high side driver to operate. The failure happens as soon as the 5v logic signal is turned on. I have had straight shorts from VDD to GND, and I have ...
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1answer
41 views

Zero Voltage in a power semiconductor chip

In an ON-mode silicon IGBT chip operating within a real power module, is the collector contact fixed at 0 V or emitter? What about Power SiC MOSFET? enter link description here
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2answers
711 views

IGBT transistor with auxiliary emitter

Recently I discovered, that some IGBT transistors in IGBT modules have the second pin for an emitter, called auxiliary emitter. In the picture above 2nd and 4th pins are auxiliary emitters. This is ...
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1answer
89 views

What causes random ringing in my inverter?

I'm currently redesigning the inverter for driving my induction heater. While I've sorted out most problems I encountered I'm still struggling with the actual inverter. Picture 1 shows the waveform ...
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0answers
84 views

inverter circuit

My inverter only produces about 8 volt output while the supply is as high as 20vdc, what's wrong with my inverter circuit ? ...
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1answer
45 views

TO-247 High Voltage pin clearance

I am using IXYH16N170CV1 IGBT's mounted at the edge of a PCB. The legs will be long and bent back to reach the heatsink shown in the image. This device is rated for 1700 V and 16 A. My nominal ...
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26 views

Temperature-dependent leakage current in IGBTs

On one hand, the leakage current of power electronics modules such as IGBTs depends on the temperature. On the other hand, the temperature distribution on the IGBT chips is significantly non-uniform ...
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1answer
47 views

1A relay replace by IGBT

Is it possible to use IGBT to replace a relay , previous i use EV-200 (1A relay) to switch DC 600V 500A like the pic below Now i want to use IGBT to replace, but i have no idea about how it be just ...
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1answer
76 views

How to tell if an IGBT is latched or broken?

I recently bought an IXXH80N65B4 high voltage/current IGBT. I had it wired according to the circuit below, which is part of a coil gun. After successfully firing the gun twice, I used the same IGBT ...
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117 views

Simulate H Bridge in Pspice

I want to simulate an H-bridge in pspice but it doesn't work and Z3 and Z6 (High side and low side IGBTs) can not drive at the same time. Here is my schematic
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29 views

IGBT Power Calculation in motor control application

My DC motor's nameplate says: VOLTS: 125 AMPS: 27A HP: 4 HP RPM: 5000 RPM DUTY: CONT. I chose this IGBT IKW50N60DTP to drive the motor with a PWM frequency of 5 kHz using a single-quadrant ...
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1answer
110 views

Does the lack of a primary DC blocking capacitor cause my tesla coil driver to explode?

Lately I've been tinkering with an SSTC half-bridge driver. I've ran a couple of tests using relatively low input voltages ~50V and the IGBTS seemed to do fine, there was no noticeable heating at all. ...
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1answer
208 views

Choosing a suitable power supply for a MOSFET driver chip

I would like to use the TC4427 MOSFET driver chip, in order to switch the current through the IGBT AUIRG4PH50S, which will be placed in series with a resistive load. The power supply providing the ...
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2answers
130 views

What limits the number of MOSFETs/IGBTs in Series / Parallel

I was looking at HVDC systems out of curiosity and I have a question that I have not exactly found an answer for. In HVDC converter, because of the high voltage (Tens/Hundreds of kV) they have to ...
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3answers
55 views

Bipolar transistor. Unknown graphs

I read a course about power transistors and I encountered these graphs The chapter is talking about safe operation of BJT. Can anyone tell me what those graphs are ? (And how to read them).
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2answers
188 views

IGBT destroyed. Help me identify any potential problems

I am trying to build an inductive oven control (for temperatures up to 1500 C), that controls the temperature by turning on the the inductive oven on and off like a commercial inductive hotplate. ...
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1answer
156 views

What might be the reason for improper turn on of IGBT

Here I am applying 3-phase rectified dc to the non-isolated boost converter, the magnitude of applied voltage is 450V and desired o/p voltage is 475V. Switching frequency of PWM is 28k. I am using ...
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1answer
57 views

Question on the right PWM frequency for Permanent Magnet DC Motors

I know that there are some posts in this site about this question. I don't know if there's a way to find out the "ideal" PWM frequency for motor control. Usually they recommend to be safe in a range ...
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2answers
59 views

Collisions of Thermal Impedances

As shown in the picture below, thermal impedances of an IGBT device depends on the temperature. However, there is a strange phenomenon as follows. While with increasing the temperature, steady-state ...
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1answer
48 views

Is there an industry-wide name for anti-parallel diodes across an IGBT module's collector and emitter?

For example, this datasheet refers to a 'freewheeling' diode and a 'boost' diode. The upper diode is the freewheeling diode, right? If you wanted to switch an inductive load with a single such module,...
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3answers
71 views

Question on current sensor sampling

I'm using this current sensor TLI4970-D050T4 located at the emitter leg of a power IGBT. This transistor is being switched at 10 kHz. How do I choose the convenient sampling frequency for the sensor? ...
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1answer
84 views

IGBT and MOSFET for driving motor

I have a question that in motor driving application, by using power MOSFET, it must be in saturation region, is this right? And for IGBT, in which region it must be to act as a switching device?
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1answer
134 views

Maximum switching frequency

Is it possible to calculate maximum switching frequency of IGBT having only datasheet in hands? https://www.semikron.com/dl/service-support/downloads/download/semikron-datasheet-skm200gal173d-...
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1answer
34 views

HO defaults “On” on high side/low side driver

I have an application where I need to drive 2 piezoactuators in a push-pull arrangement (voltage 180deg out of phase with each other) where the charge/discharge time is about 50 microseconds and the ...
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1answer
45 views

Ic and Vce equations of IGBT

I know in IGBTs while operating, parameters Ic (collector current) and Vce (collector-emitter voltage) are Tj (junction temperature) and Vge (gate-emitter voltage) dependent. Is there anything else ...
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1answer
46 views

Calculation of Vce from Ic-Vge Characteristic

We have found the Ic-Vge (collector current vs gate-emitter voltage) characteristic of an IGBT device as shown below at a high Vce (collector-emitter voltage) value (here 20V) from the datasheet (...
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0answers
263 views

IGBT failure and protection

I have a 3-phase bridge rectifier (shown below). I am using an IGBT (STGE200NB60S) to limit the inrush current from the capacitors at start up. I also added the NTC thermisters to help with the inrush ...
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2answers
63 views

Ic-Vge IGBT Curve

In the figure below, presented in the manufacturer datasheet, you can see the Ic-Vge curve of an IGBT device. As mentioned, it has been drawn at Vce=20V. What does this equality mean? Can we have such ...
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1answer
338 views

Is this the correct way to calculate IGBT power loss?

I am having trouble obtaining the power dissipation of IGBTs. It does not have a buit in diode and it isn't driving an inductive load. So I read in an application note that IGBT power losses are ...
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1answer
977 views

How does carrier frequency and pulse width modulation in a VFD work together to control AC motor speed?

There is a lot of online information about this but there is also a lot of contradictory information. What is carrier frequency exactly and does it stay the same or does it vary? I understand the ...
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0answers
27 views

High Speed Piezoactuator Driver-Unexpected (Low) Voltage Output

I'm working on a project that requires charging and discharging a piezoactuator (150V, 1.5μF) extremely fast, IE total slew time allowed ~50μs (so somewhere around a 11A pulse). My background is in ...
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1answer
256 views

IGBT contactor design

I found this circuit in an older post. I was thinking about using this in place of a contactor to break under load. The load would be at 500V 300A DC. There would be overcurrent protection in line ...
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1answer
65 views

on-state voltage

I am trying to study an ever-on IGBT. in other words, IGBT is tried to be on in a long time. To this purpose, a +15V constant dc voltage is applied to the gate-emitter. But, when connecting a +2V ...
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1answer
89 views

How to find relationship between switching energy loss, temperature and current in an IGBT

I am calculating the losses of an inverter in Simulink. I used 'IGW25N120H3' IGBT for the inverter. In the datasheet, they have mentioned switching energy losses for 2 different temperatures and from ...
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1answer
228 views

Select bootstrap capacitor value too high

What happen if we choose bootstrap capacitor value too high in high side gate driver applications? Can it be harmful for MOSFET/IGBT or it is just not important?
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0answers
63 views

Delamination in Pb-free solder joints

It is worth knowing that two material types are commonly used for soldering power semiconductor chips (IGBT, MOSFET, ...) to DBC substrate inside power electronics modules. They are Pb-rich and Pb-...
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1answer
217 views

IRGB14C40L and MC33153

I want to drive a power ignition IGBT (IRGB14C40L), and for this a driver MC33153 has been chosen. I have several questions about my supposed schematics, shown below: 0) This design will (allegedly) ...
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2answers
90 views

IXDP 20N60B IGBT reversed biased conductive

I am using the IXDP 20N60B IGBT as an AC switch. This IGBT has no internal diode. When the Gate Emitter voltage is ~10V the device is on and conducts in the forward biased region as expected, shown ...
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0answers
85 views

Failures on underside layers of a chip in IGBT power modules

Does somebody know how I can detect a layer of IGBT modules in which a thermal failure, e.g., voids, cracks, delaminations of solder joints, has taken place? We know there is fatigue in both solder ...
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1answer
128 views

IGBT Rectifier Gate Voltage

I have a 3-phase bridge rectifier which uses IGBT's shown in the image below. The circuit works perfectly and the voltage on the output (unfiltered) is exactly as expected. However the gates are ...
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1answer
408 views

Difference between Vth and Vge?

What is the difference between the threshold voltage (Vth) and gate-emitter voltage (Vge) for IGBT devices? How can I calculate Vth of an IGBT chip?
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3answers
81 views

What specifies how much energy can be disspated in an IGBT when switching off?

I am driving an inductive load with an inductance \$L = 500\mu H\$ with a steady-state current of \$I = 300A\$. I would like to switch this current off quickly, and I plan on using an IGBT to do so. ...
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0answers
118 views

Why if I change the sample time in Matlab/Simulink modifies results in a huge way?

I'm having trouble with the circuit I'm studying but in order to modify some values, I want to get out this question of my mind. * Example 50e-6 * Example 50e-7 * Example 50e-8 I use a S-Function ...
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1answer
139 views

Electrical Conductivity of SAC solder

Can anybody help me find the electrical conductivity of SAC 305 (96.5Sn3Ag0.5Cu) solder? It is the most common solder in semiconductor IGBT/MOSFET power switches. Many thanks and best regards,
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1answer
363 views

active miller clamp and desaturation detection in mosfet drivers?

Newer mosfet/IGBT gate drivers like 2ED020I12FA and TD352 have features called : Active miller clamp and desaturation detection . However the example circuits are shown with IGBTs only. So my ...
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0answers
73 views

Why Fault pin of IR2136 gate driver is getting low at high voltage?

I am implementing a variable frequency drive for a three-phase induction motor. I used IGBT module fs25r12w1t4 with gate driver ( three phase, six Channels IR2136). When I increase the voltage, the ...
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2answers
105 views

What is the difference between high and low frequency IGBTs?

I would like to know which parameters make the difference between a high frequency IGBT and a low frequency IGBT. For example, I read the AIKW50N65DF5(15 - 120kHz) datasheet and the AIKW50N60CT(0 - ...