IGBT Replacement For Treadmill Motor Driver Help! - Page 1
Forum section: electronics / repair

author: nour
author_rank: Frequent Contributor
timestamp: November 01, 2020, 04:11:17 am
content: I have aMC2100ELS-18Wmotor controller and after inspection found that the IGBT is shorted, the part number isIRGPC40KI suppose this is a discontinued part and I do not want to buy from China and want to find a replacementI have no experience when it comes to IGBT and I am not sure about all the important specs to look forI have been able to specify a replacement and I want some advice if it is suitable or notAOK30B60D1andAOK40B65H2ALI was looking for the following:Vce, Vge, Ic, Pd, Input Capacitance, Gate Charge, Turn-On DelayTime, Turn-Off Delay TimeI am really not sure if I should look for something else or not and whether if those specs should be exactly the same or not, some of them are a little bit higher like power ratings and voltages and other are lower like Charges, Capacitance and Delay timesOne thing that I am not sure if it will change anything or not that the old part has no diode integrated and the new replacement has integrated one and I suppose that diode specs should also be respected !This Controller is usingIR2127IGBT Driver and the motor is rated for 130V DC and 2.75KW continues Duty

author: m k
author_rank: Super Contributor
timestamp: November 02, 2020, 05:58:58 pm
content: I'm also far from an expert and that power must be respected but...There used to be a time when few wheels and few hps were not stopping anybody.And BTW, what's your motto.(actually bump)I can't think that possibly two protection diodes are worse than one.Can you test the motor unloaded?

author: krish2487
author_rank: Frequent Contributor
timestamp: November 02, 2020, 06:13:54 pm
content: Take your pick from anyone of them.https://www.digikey.com/en/products/filter/transistors-igbts-single/279?s=N4IgjCBcpgbFoDGUBmBDANgZwKYBoQB7KAbRABYwBmK8%2BAym8gdhAetoA4QBdAgBwAuUEAGVBAJwCWAOwDmIAL4E4ABioIQySOmz4ipEJwCsAAhkBhNkdjmrBTszvXOnZw4Cc7kB9XePAEz%2BVP7k-maWvALCkCAAqjJSggDyKACyOGhYAK4SOEoqHpwemtq6uATEkGSqUSBCIuLS8gUgAWDqpaiYFQbVILCqfgBq1rDGI3UNsQlJqRlZufmKygOaUgAmIu2qENEisynpmTl51oIAnvz5sVnIK0AThis looks like a reasonably decent almost drop in replacement.https://www.st.com/resource/en/datasheet/stgwa30hp65fb2.pdfThe criteria you have chosen are mostly correct. You need to see for Vce > Ic > Qg > Input Capacitance > Everything else...And as far I am aware ( I could be wrong ) all the IGBTs come with the body diode. The body diode will generally be specced to the transistors spec. Youdont have to worry about anything specific for the body diode in the replacement.

author: nour
author_rank: Frequent Contributor
timestamp: November 04, 2020, 08:55:44 am
content: I have chosen this oneIXXH30N65B4https://www.tme.eu/Document/69a0c604e0a9dc65eedb30697770eecb/IXXH30N65B4.pdfNot yet tested!

author: ErwinsCat
author_rank: Regular Contributor
timestamp: November 04, 2020, 03:02:51 pm
content: I believe when you replace a IGBT, most values could be higher and probably its better, but if the Gate Threshold Voltage Vge(th) was higher, there is a possibility that a new transistor with a higher Vge never conducts in the old circuit.