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I thought about doing this pro-actively to get less heat overall and more efficient operation - including more range. But when I ran the numbers it didn't seem like the benefit was worth all the work taking my PEM apart and soldering. That is especially true given that my PEM is working fine.
But if I had my PEM apart anyway to replace a few IGBTs, I would replace all of them with the newer low saturation voltage versions. I confess I didn't think there would be any issues with the driver.
But if I had my PEM apart anyway to replace a few IGBTs, I would replace all of them with the newer low saturation voltage versions. I confess I didn't think there would be any issues with the driver.
Any suggestions for alternative IGBTs (to save me doing the research)?
I didn’t even get a chance to use my new Can before the PEM went!
Thanks Daniel,
So it seems best to stick with the IKW75B60T given the unknown effect of changing any patameters - even Vsat with regards to the drivers etc.
Luckily I'm good at soldering and am also a director of an excellent contract electronics manufacturing facility here in the UK!
www.printsys.co.uk
My only reservation about all of this is not being able to easily diagnose if anything else is wrong with the PEM.
Those look promising but they have a higher gate voltage threshold. It would be tempting to try them if you were designing from scratch but I think you'd run into driver compatability issues in the PEM.If somebody is feeling adventurous, it might be possible to switch to Cree silicon carbide mosfets. They claim to have much lower switching losses than IGBT's. This would likely be a much more involved project though.
Wolfspeed Introduces New SiC MOSFET for EV Drive Trains
I’m seriously considering repairing the PEM myself because Tesla (UK) can’t tell me if their expensive PEM refurbs have the insulation issues addressed
It would be great if you have the facilities and do this, because sooner or later I'm sure several UK owners will be interested in the same job.
1) Engage Gruber for a repair/upgrade
2) Remanufactured PEM from Tesla
3) 3.0 battery - trying to work this angle. Since the upgrade comes with a modified PEM, maybe we can sneak this in the $29k cost?
4) Others?
Sorry to hear about your possible PEM issue.
Is this still your original PEM? It is the original PEM. I have ~78k miles on the odometer
One major question I have re remanufactured Tesla PEMs is what is a "remanufactured" PEM?
It comes with a short warranty, but I worry the "remanufactured" PEM may have not have insulators that are in great condition.
Does Tesla inspect/ replace as necessary the insulators as part of the remanufacturing process or could you end up with
someone else's remanfactured PEM (that possibly failed for a completely different reason) that has insulators 50% degraded on their way to failure? This is probably my biggest hesitation to go with a Tesla PEM
It would be great if someone could extract this answer from Tesla of what consists of the "remanufacturing" process,
It was one thing when you received a remanufactured PEM under warranty, another when you are dropping $10k.
If you need a battery, I would go with the 3.0 if you could get the PEM thrown in. Besides spending the $30k, this is an easy call. I don't need a battery at this time, but since I plan to keep the Roadster as my daily driver (~12k miles per year) I certainly will at some point. Currently I was thinking in about 5 years. This could change tomorrow if I had a sheet or two go bad and then I would have lost the opportunity to get the PEM thrown in. To be clear, I have not yet investigated this with the SC so it may not truly be an option.
A more permanent solution may be the Jonathanm route. If it works, that would be fantastic. If it doesn't, as long as you can still use the PEM as a core exchange for a remanufactured PEM, you lose very little except time (but you gain knowledge and the rebuild experience). Yep, I'm a little intrigued by this. I have little/no electrical engineering experience so I am a little hesitant (although I did put together and solder the OpenEVSE kit and have done the PEM cleaning ). Not sure I can wait 3-4 weeks though.
Companies such as Gruber may be the go to as the years go by. In fact, they may even be the go to by Tesla one day to keep us owners happy who knows.
Let us know what you decide and outcome.
1) Engage Gruber for a repair/upgrade
2) Remanufactured PEM from Tesla
3) 3.0 battery - trying to work this angle. Since the upgrade comes with a modified PEM, maybe we can sneak this in the $29k cost?
4) Others?
I know this can be a controversial subject around here for other reasons, but companies like Gruber may become an interesting option.
It seems Gruber , when performing a PEM rebuild, will tell you what they have replaced and upgraded (electrolytics/insulation) etc.
They offer a couple of rebuild - upgrade options.
I'm just not sure if anyone has had their PEM repaired through them yet. If anyone did, it would be very valuable to hear a review.
I've spoken with two people who had their PEMs repaired or replaced by Gruber. Both of them were happy.I'm just not sure if anyone has had their PEM repaired through them yet. If anyone did, it would be very valuable to hear a review.