Questions tagged [igbt]
Insulated-gate bipolar transistor, voltage-driven power transistor with fast switching times
2
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2answers
705 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 ...
1
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1answer
74 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
66 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 ?
...
1
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1answer
39 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 ...
0
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0answers
24 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 ...
0
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1answer
43 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 ...
0
votes
1answer
63 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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0answers
61 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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0answers
27 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 ...
-1
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1answer
93 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. ...
3
votes
1answer
158 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 ...
1
vote
2answers
107 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
52 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).
1
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2answers
183 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.
...
1
vote
1answer
148 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 ...
0
votes
1answer
52 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 ...
1
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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 ...
1
vote
1answer
44 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,...
1
vote
3answers
63 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? ...
1
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1answer
79 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?
0
votes
1answer
111 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-...
0
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1answer
32 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 ...
0
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1answer
40 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 ...
0
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1answer
44 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
218 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 ...
0
votes
2answers
51 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 ...
2
votes
1answer
215 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 ...
1
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1answer
726 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
25 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 ...
0
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1answer
204 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 ...
0
votes
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 ...
0
votes
1answer
87 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 ...
0
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1answer
191 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
58 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-...
0
votes
1answer
192 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) ...
0
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2answers
89 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
84 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 ...
0
votes
1answer
112 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 ...
2
votes
1answer
392 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
80 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
117 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 ...
0
votes
1answer
117 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,
1
vote
1answer
336 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
68 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 ...
0
votes
2answers
98 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 - ...
0
votes
1answer
70 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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vote
2answers
257 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 ...
1
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2answers
80 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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votes
2answers
579 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 ...
0
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0answers
290 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 ...
