How to design a heatsink for a igbt module mbp75ra120?

[julioreye]

How to design a heatsink

I need to design a heatsink for a igbt module mbp75ra120. I don't know how to find the correct heatsink.

Help. regards.

 

[IanP]

Re: How to design a heatsink

First, estimate how much power you need to dissipate, this device can do max 700W and it's thermal resistance ≈ 0.2°/ W..
Then go through examples at:
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXusyv.pdf
and finally, from a catalogue (google is your friend) select a heatsink that can be appropriate for the task ..

Rgds,
IanP

 

[julioreye]

Re: How to design a heatsink

and how I know the power that I need dissipate?. How I estimate it? give me an example, please.

Regards.

 

[svhb]

Re: How to design a heatsink

You need to estimate the conduction loss and switching losses of the IGBT's and diodes in the module. There is some literature available on the net.

If you have already a working system, you can try to measure the efficiency of the system. The difference between the input power and output power will be disipated in the module.

Stefaan

 

[Tahmid]

How to design a heatsink

Hi julioreye,
Majority heat is dissipated as conduction loss which can be calculated from the formula:
(I * I * Rdson * 1.3)
I = Current through IGBT
Rdson = On state drain to source resistance (find from datasheet)

 

[eem2am]

How to design a heatsink

and you must know if you use fan or not.

Remember your equation

Rth(JC) = (Junction Temp - Case Temp) / (Power_dissipated)

remeber you have several igbts in the module