Paul & Sabrina's cheap DIY 144v motor controller

[jackbauer]

12" x 6" pre drilled for 4 of the powerex cm400du-12f igbts , 4 mounting holes and 2 ports for cooling fluid.

[sawickm]

Originally Posted by MPaulHolmes

I'll send stuff to Mark.

Hey Paul,

You can email me the new files, and I'll post it on the wiki as soon as I can.

-Mark

[edown]

Did someone say “water cooled IGBTs”?? This is what I’ve been working on. The white tape shows the 3/8” drilled coolant path in a ¾” aluminum plate.. It has 3, 300Amp IGBTs, and 16, 75Amp 1200V Hyperfast Diodes. The 4400uF caps are 300V..
Paul do you have any more of the IGBT driver boards?
[/IMG]

[edown]

[edown]

[edown]

[vwdevotee]

My, edown, what big capacitors you have. Jack, what is your heatsink going to be made of? Aluminum, stainless, copper, or other?

[isaac_alaska]

hi, i'm new to the forum but i'm looking to build a healthy motor controller with more than enough power to do whatever needs to be done. I'm running a warp7 dc series motor on an electric snowmobile conversion, and need a new motor controller. ideally i'd like to run as much as 400 volts to the motor controller, and then limit that to a max of 170 volts out to the motor. i haven't yet read all of the pages here but i'm sure someone has talked about this already, if one of you could kindly point me in the right direction. i guess what i'm asking is what all would i have to change in order to operate the controller with a 400V max instead of 144. to me it seems like this would mostly be a change in the power board of the controller, by switching to components that can handle a higher voltage.

-isaac

[vwdevotee]

You're not looking at a minor modification to the power board, you're looking at an entirely new power board design.


Not to be a downer, but where the hell are you going to put 400V worth of batteries on a snowmobile? That's a lot of stuff in a pretty small package. Unless you're planning to use C cell batteries and only go a few miles.

[adamj12b]

Originally Posted by isaac_alaska

hi, i'm new to the forum but i'm looking to build a healthy motor controller with more than enough power to do whatever needs to be done. I'm running a warp7 dc series motor on an electric snowmobile conversion, and need a new motor controller. ideally i'd like to run as much as 400 volts to the motor controller, and then limit that to a max of 170 volts out to the motor. i haven't yet read all of the pages here but i'm sure someone has talked about this already, if one of you could kindly point me in the right direction. i guess what i'm asking is what all would i have to change in order to operate the controller with a 400V max instead of 144. to me it seems like this would mostly be a change in the power board of the controller, by switching to components that can handle a higher voltage.

-isaac

Isaac,

Running 400V and reducing to 170 would be pointless unless you are using batteries that sag by 60%. You would most likely not need to go over 250V to always get 170 at the motor and nothing lower.

As for going higher then 250V, you will need to redo the power board at the minimum to increase the isolation gaps or else you will have problems with the high voltage humping the gaps.

If you want high voltage, you will be better off going with IGBT modules.

Are you riding the sled long range or doing something like grass drags?

-Adam