Yet another new project! EV motorcycle *updated* aug 7

Pugsley · Post by **Pugsley** » Mon Jul 19, 2010 8:19 pm

Well, if I was going to do a EV anything it would be a variable frequency drive. This way you can program curves into the way it accelerates and make it have no problems hooking up. You could even go so far as to add an encoder to the front wheel and when the back wheel spins faster then the front it backs off the power a bit. like traction control, but way better.

That has all ways been my plan if i build a EV car. then i can program in curves and go bracket racing and win every time. hell even let the car launch itself. Have a camera watching the tree and when it sees it light up, it goes at a prescribed rate and runs the quarter in whatever time I told it to do. Dont know if that's legal, even if its not I can still have the curve to run it at a precise time after launch.

TheSovereign · Post by **TheSovereign** » Mon Jul 19, 2010 10:06 pm

added circuit prototype and test vid.

normalicy · Post by **normalicy** » Tue Jul 20, 2010 1:54 am

LOL, for a sec, I thought that that board was going to control the motors exclusively & was like, "How the heck is he gonna push that kinda current through that?" Fortunately the video answered that question.

Koo Koo Mouse · Post by **Koo Koo Mouse** » Tue Jul 20, 2010 1:16 pm

Years ago I built something just like what you have on that breadboard there. Mine was to control heat to a thermoplastic welder because it ran to hot. Worked great and still does. I fed the pulses to a 25 amp solid state relay to handle the load to the heating element.
Are you going to use ssr's to deliver the power or make your own? (those mosfet's you were speaking of?)

Good work SOV and keep us posted. I love this sorta stuff!

TheSovereign · Post by **TheSovereign** » Tue Jul 20, 2010 1:31 pm

Koo Koo Mouse wrote:Years ago I built something just like what you have on that breadboard there. Mine was to control heat to a thermoplastic welder because it ran to hot. Worked great and still does. I fed the pulses to a 25 amp solid state relay to handle the load to the heating element.
Are you going to use ssr's to deliver the power or make your own? (those mosfet's you were speaking of?)

Good work SOV and keep us posted. I love this sorta stuff!

thanks kook! im going to be using mosfets, 3 of them with a very large heatsink, but i bought 8 of them because i was told they will burn easily if i rev it enough

http://www.amazon.com/American-Microsem ... 603&sr=8-1
thats what i bought. i imagine 3 of those is more than adequate
they are 200v 30amp N channel mosfets.

http://www.datasheetcatalog.org/datashe ... FP250N.pdf datasheet.

TheSovereign · Post by **TheSovereign** » Fri Jul 23, 2010 12:29 am

nother update

normalicy · Post by **normalicy** » Fri Jul 23, 2010 12:39 am

Nice progress.

TheSovereign · Post by **TheSovereign** » Sat Aug 07, 2010 4:48 pm

more photos

normalicy · Post by **normalicy** » Sat Aug 07, 2010 9:37 pm

Hey, that heatsink looks familiar for some reason

You gonna retain the gas tank & mount a battery underneath it or did it even have one to start with?

TheSovereign · Post by **TheSovereign** » Sun Aug 08, 2010 7:50 am

normalicy wrote:Hey, that heatsink looks familiar for some reason

You gonna retain the gas tank & mount a battery underneath it or did it even have one to start with?

hey its intel p4 heatsink, and no the owner wanted to ebay the tank. the rest of the bike as you can see is a wash.

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Yet another new project! EV motorcycle updated aug 7