VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Electric Motors and Controllers
squeegee   10 mW

10 mW
Posts: 29
Joined: Sep 28 2014 1:12pm

Re: VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Post by squeegee » Aug 20 2020 11:23pm

Depending on price I'm up for one or two.
BTW what do you figure max battery voltage would be, ie what margin should I plan for overshoot and such.
Last edited by squeegee on Aug 31 2020 11:07am, edited 2 times in total.

squeegee   10 mW

10 mW
Posts: 29
Joined: Sep 28 2014 1:12pm

Re: VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Post by squeegee » Aug 22 2020 9:20pm

Oh and what size do you think it will be?
Last edited by squeegee on Aug 31 2020 11:08am, edited 1 time in total.

bww129   100 mW

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Re: VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Post by bww129 » Aug 30 2020 8:26pm

SRFirefox wrote:
Aug 11 2020 6:18pm
I've been thinking about this on and off and after a little digging, found a thermal conductivity figure for Kapton of .12W/m*K.
Apparently not all types of Kapton are created equal when it comes to thermal conductivity.

https://www.dupont.com/products/kapton-mt-plus.html
Dupont's Kapton MT+ specifically made for high thermal conductivity is 0.8 W/mK, which is 6.7 times higher than 0.12 W/mK figure you may have found here http://www.mit.edu/~6.777/matprops/polyimide.htm

https://www.dupont.com/products/kapton-mt.html
Dupont's Kapton MT is 0.46 W/mK.

https://www.dupont.com/content/dam/dupo ... nhofer.pdf
Dupont's Kapton FWN targeted at magnet wire insulation is around 0.19 W/mK.

https://www.tapesolutions.saint-gobain. ... S-1358.pdf
This interesting silicone-coated Kapton tape (1 mil thick Kapton, 1.5 mils acrylic adhesive, 2 mils silicone rubber) is specified at 0.60 W/mK.

squeegee   10 mW

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Joined: Sep 28 2014 1:12pm

Re: VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Post by squeegee » Sep 04 2020 6:59pm

Was buying guitar pots on Mouser and had a look at IRF200P222 outa curiosity.
FWIW, I did see two IXYS parts, one "new" with 220A/6mhoms and another with 300A/4mohms but higher gate charge...oh and 3x $

zombiess   100 MW

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Re: VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Post by zombiess » Sep 04 2020 10:31pm

squeegee wrote:
Sep 04 2020 6:59pm
Was buying guitar pots on Mouser and had a look at IRF200P222 outa curiosity.
FWIW, I did see two IXYS parts, one "new" with 220A/6mhoms and another with 300A/4mohms but higher gate charge...oh and 3x $
This project has been on hold for the last month+ due to another project with the possibility of pay taking precedence, so no updates yet.

The IXYS parts are nice, incredibly expensive and in low supply. The IRF200P222 is nice, lower cost and plenty of supply.
Fundamentals United, Inc.

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ElectronS   10 mW

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Re: VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Post by ElectronS » Sep 09 2020 10:20am

cool project ... I have 2 questions :

1-what is the ticking sound in the motor testing video ( thermal test ) . is it moving the motor then shutting down then powering again ???

2-When you solve the logic (reset) problem will you make the schematics pdf open source , I am really interesting in this 3 stack with all logic board seems fun

cheeers

zombiess   100 MW

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Posts: 2992
Joined: Feb 01 2011 2:16am
Location: Ventura

Re: VESC based +200A powerstage with 200V MOSFETs (videos of it in action)

Post by zombiess » Sep 10 2020 1:01pm

ElectronS wrote:
Sep 09 2020 10:20am
cool project ... I have 2 questions :

1-what is the ticking sound in the motor testing video ( thermal test ) . is it moving the motor then shutting down then powering again ???

2-When you solve the logic (reset) problem will you make the schematics pdf open source , I am really interesting in this 3 stack with all logic board seems fun

cheeers
1. It's cogging the motor because I have the opposite motors phases shorted. It takes an very large amount of current to overcome the resistance on a motor this size (~40HP). It also proves that the resolver is tracking the rotor really well as this is sensorless.

2. Not sure where I'm going to take this design yet, I do have the intention of selling power stages /gate drives at some point.
Fundamentals United, Inc.

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