EVcast.com is the home of the EVcast. The EVcast is a podcast dedicated to bringing consumers the latest information on electric vehicles in a non-technical, non-political, and entertaining way. Don't forget, you can also subscribe to this podcast via iTunes or your favorite podcatcher.
NEW! Stream the latest episode of the EVcast from your website by including this one simple line of javascript:
<script src="http://www.igroops.com/evcast.js" type="text/javascript"></script>
Watch this Blog Notify me by e-mail any time a new post is made to this blog.
The EVcast is a podcast dedicated to bringing consumers the latest information on electric vehicles in a non-technical, non-political, and entertaining way.
Become Our Platinum SponsorProduct ID: 00000003Currently In Stock: 0
For the main sponsor, you get the big prize! A 622px wide x 100px tall banner that will appear on just about every page within EVcast.com, including blog posts. On the homepage, in place of the banner you will have a custom ... More »
Price: $2500.00
June 2009 Posts
Archives
Join your British host Nikki Bloomfield and guest Paul Holmes as they discuss the open source EV motor controller project.
Don't just listen to the EVcast -- experience and be a part of it! Join us at 1:00pm Eastern, M-F, in our live video broadcast and chat along with us!
Nikki,
I heard about Paul's dilemma with the blown MOSFETs on his controller. This is just a guess but it sounds like Paul either didn't have snubber diodes installed in parallel with the series DC coil of the motor or the snubber circuit wasn't adequate for the job. If it wasn't a snubber problem I would be interested to know what it was that caused the chatter event.
I was very interested how Paul used MOSFETs cascaded together to achieve higher amperage handling. High power MOSFETS designed for controllers are very pricy but getting cheaper lower current handling MOSFETs are a good way to go if you can't afford the pricier high current handling MOSFETs. We use this solution in Ham Radio all the time for medium power homebrew(25 to 75 Watt power levels) transmitter gear.
Cheers,
Rick, from the oil capitol of the world, Houston, TX.
quote comment
Wonderful show!! Just the kind of DIY controller I have been looking for.
Thank you.
Tbone61032
Great interview, and a stellar project. I'm working on an EV conversion and have been looking for a controller. This is appealing on so many levels (cost, open source, pride of building, etc). Being able to build something this cheap makes the project go a whole lot faster!
