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Questions tagged [igbt]

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

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2answers
157 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
114 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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0answers
33 views

IGBT died probably due to Inductive Load, What to do?

one of my IGBT died during its first test yesterday. I want to be able to switch an Inductive Oven (same like many modern hotplates) on and off in a specified Interval (every 3 or 4 seconds for ...
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32 views

BLDC motor driver voltage drop

I am making 220 V sensorless BLDC motor driver, DC input is 315 Vpp, but when I'm trying to run the motor the voltage will drop to 0.7 V, the supply of the whole circuit from, 15v of the IGBT driver ...
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17 views

Gate voltage of power semiconductor devices in datasheets

Many static characteristics of power semiconductor devices are presented in available datasheets at a specific gate voltage. For example, they are achieved at Vge=15V for IGBT devices and Vgs=20V for ...
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1answer
39 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
56 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
37 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
55 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
59 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
58 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
27 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
33 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
35 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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103 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
31 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
84 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
261 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
24 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
108 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
64 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
80 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
100 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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54 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
113 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
78 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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82 views

Is this a reasonable schematic to drive an IGBT?

I'm using a gate driver to turn on an IGBT from an isolated power supply. The part I'm most confused about is whether it's necessary to ground emitter to the power supply. I'm also fairly confident ...
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81 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
89 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
368 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
78 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
96 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
66 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
238 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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50 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
88 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 - ...
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1answer
67 views

why fs25r12w1t4 infineon module is burnt out when high current is paassed through it?

I am implementing a VFD for Induction motor drive. I have used fs25r12w1t4 Infineon IGBT module ( 1200v 25A) with gate driver 6ed003l06-f2. It always burnt out when I passed 2A current. What may the ...
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2answers
169 views

TTL or IGBT Output - software switchable

I am creating a circuit which will be used in an Engine Management system. Its function is to: a) either drive a 12v ignition coil directly (using a normal IGBT) b) or if required, offer instead a ...
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2answers
67 views

Three phase rectifier heatsink

I need to choose a heatsink and a fan for cooling a three phase rectifier. Let's say that the total power dissipation is 1.8kW and that the rectifier is made of three half bridge IGBT/diode modules ...
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2answers
430 views

IGBT H-bridge failure

I am using Infineon's IGBT - IKW50N65H5 and IKW50N65F5 for a H-bridge inverter. The DC supply to the inverter is the line supply of 230VAC with KBPC5010's full wave rectification. The bridge was being ...
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211 views

Can you drive a logic level IGBT directly from a micro controller?

My question pertains specifically to devices like an EcoSPARK®2 400V, N-Channel Ignition IGBT. I'm investigating the requirements for building an electronic ignition system for a go cart. This would ...
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48 views

Pspice Model Editor Error: Extraction Stopped

I use some IGBTs. Their spice models are available but not suitable for my simulation. I have to create my own model according to datasheet informations. Pspice Model Editor is a good option but I ...
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28 views

Why does the IGBT type PT have a smaller Vce(on) and bigger current tail than type NPT?

My question concerns the additional buffer N+ layer in PT IGBT structure. This layer permits to reduce the N- thickness and also play a role as recombination region for electrons of N- region and ...
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1answer
365 views

IGBT failure on Inverters [closed]

We were using Mitsubishi IGBT with the code CM400DY-24NF but had to change to Fuji IGBT 2MBI450U4E-120. These IGBTs are used in inverters and the inverters are used in solar energy applications and ...
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2answers
65 views

Repairing failed board trace

I am replacing some igbt transistors on a circuit board from my Samsung TV. While de-soldering one of the 4 components one of the traces from the gate lead fell off. I am looking for the best ...
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104 views

IGBT SOA rating vs. Short Circuit rating

I have an IGBT (with integrated anti-parallel diode; forgive the BJT symbol in the diagram) that is switching an inductive load with a ~300 Vdc supply. The threshold voltage is ~5V and I'm driving it ...
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2answers
474 views

IGBT-based capacitor charge transfer and thyristor-based capacitor discharge

simulate this circuit – Schematic created using CircuitLab I am designing a circuit to provide a couple of strong and fast current pulses (~1000 A, more current is better, ~100 us, half-sine) ...
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2answers
262 views

What are the parameters to consider while selecting MOSFET or IGBT for Inverter and SMPS Design [closed]

I'm working on a project to design Buck Converter with following Criteria Vin: 4.5-60V Vout:8-15V Iout:6-12Amps
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1answer
46 views

Igbt switching for magnetic coils

I am constructing igbt based switching circuit for switching multiple coils with a proper time delay for a scientific experiment. I need to simulate the circuit before doing on board. I am using ...
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1answer
67 views

Thermal design for an IGBT

I am working on a project that involes an inverter made with IGBTs. The device I selected for builing the H bridge is this: STGW60H65DFB. One of my roles in this project is also to select a suitable ...