Comments on: Siamese electric motors

By: Israel Mc Duff

Israel Mc Duff — Tue, 11 Jan 2011 21:38:45 +0000

where can i find and buy a controler for a 1000$ that can handle a 1000 Amp + !????
I need one!!!!

By: abdul fatah soomro

abdul fatah soomro — Mon, 18 Dec 2006 19:02:02 +0000

we are in need of electric motors of various type for our new flour mills unit. can u sent us complete details of your product.

By: Robb

Robb — Mon, 13 Nov 2006 00:29:40 +0000

We need a tutorial. At least those like me who would like to try this and have no idea how to rebuild an electric motor of this size. Much less make it a twin.

By: Markp.com

Markp.com — Fri, 10 Nov 2006 02:30:04 +0000

Sweet! This is a great little hack! Loving all the EV stuff you've posted, from controllers to batteries!

More please!

By: larrino

larrino — Thu, 09 Nov 2006 20:59:57 +0000

just in time for impatient andrew I will be unveiling my latest uber_hack. It's a computer interface device modelled after a typewriter. Get ripley's on the phone!

also ready to re-test the automatic cat petter after updating the firmware. still need a new cat though ;).

By: PKM

PKM — Thu, 09 Nov 2006 16:14:45 +0000

andrew: it's been said before, and will be said again: if you don't like the content, wait 24 hours. after a very ev-oriented hack I'm sure tomorrow's will be something different. ezombie makes a good point: salvaged hardware + ingenuity + new purpose + photos of the process = hack.

if, like me, you wanted to see more pictures of the motor build process but couldn't find them, go to http://photos.plasmaboyracing.com/slideshow.php?set_albumName=buildsequence

By: ezombie

ezombie — Thu, 09 Nov 2006 07:42:50 +0000

It is a hack. It's a double hack, even. That is a *hacked* set of forklift motors sitting in a thoroughly *hacked* datsun automobile.

Kodus, I say ;)

By: andrew

andrew — Thu, 09 Nov 2006 02:40:37 +0000

not to rag on you or anything, will, but this is *hack*aday (italicized, bolded, underlined, size 120 font). if we wanted to see ev’s we’d go to an ev site. i was going to say this earlier but decided to wait until another post. this is the next post. so i am saying it now.

By: MrGoodBytes

MrGoodBytes — Thu, 09 Nov 2006 01:24:49 +0000

didnt even look that close at the pictures, opposing shaft outputs! have you ever tried to get a matched set of perfectly neutrally timed motors. have you ever tried to neutrally time motors yourself. If they hold up, I’d say he did some impressive work.

By: MrGoodBytes

MrGoodBytes — Thu, 09 Nov 2006 01:20:09 +0000

ummm, ya cool for dragging were you almost anticipate blowing something up on every outing… bad bad bad idea for everyone else.

I’ve done it with a few motors [small 1hp ones up to 12hp suckers]… never felt safe with the results.

By: Rogue

Rogue — Thu, 09 Nov 2006 00:37:30 +0000

You can see more pictures on the White zombie website gallery here
http://photos.plasmaboyracing.com/slideshow.php?set_albumName=buildsequence"

By: Rick

Rick — Wed, 08 Nov 2006 23:22:37 +0000

this looks a lot like the brushless motors model airplane guys are building from old CDROM drives, stacking armatures in a single can and custom winding the armatures.

Tho with brushless your controller is in charge of timing which allows adjustable output and greater efficiency where this dual motor DC unit has to be physically configured to time correctly.

Not bad if you have a machine shop handy and sponsors, electric vehicles used to have the curse "it's the battery, stupid" as the performance limiter. Now things are becoming " its the controller, stupid!". Finding a way to properly manage a minimum of 2 kilowatts safely and reliably and affordably is the new challenge.

that, and of course, having enough electricity to charge your batteries, which Kalifornia has shown it's unable to do reliably at even current demand over the last decade-much less in the future.

By: Darkcobra

Darkcobra — Wed, 08 Nov 2006 22:06:34 +0000

#2 – Will O’Brien: Thanks! Hope your recovery is quick, I’ve got a cold too and it’s a nasty one. That is a clever cost-reduction technique. Perhaps it offers some redundancy as well – if one motor goes bad, you won’t be racing, but you could at least drive back to the shop. EVs are out of my ability/budget right now, but this could be used for robotics and R/C too.

Others: I’d agree the OSMC would be the best starting point. With google’s cache of “why mosfets fail in sstc duty” as a laundry list of things to check if (when) it blows up. :)

The controller in the Tesla Roadster is quite talented. There is *one* controller for both driving the motor and charging. The switching transistors (and heatsinks, fans, etc.) used to drive the motor are reused and reconfigured on-the-fly into the heart of a regulated, step-up/step-down switching power supply to charge the battery from almost any power source. Apparently it even eliminates the need for an inductor as normally seen in a switching power supply, by using the motor windings! That’s an improvement in cost, component count, weight, and versatility. If anyone can figure that one out, at either robot or EV scale, that would be a truly moby hack.

By: Mitch Cerroni

Mitch Cerroni — Wed, 08 Nov 2006 20:32:57 +0000

I’ve known about the osmc for a while since I’ve build battlebots. But they need a super osmc like Tabajara said for 1000 Amp EV controller. You’re already spending several thousand for a ADC motor, batteries, and charger, the controller needs to be affordable and fixable. I can’t wait to build a EV someday, maybe a 12 second car like white zombie.

By: SOI Sentinel

SOI Sentinel — Wed, 08 Nov 2006 16:54:52 +0000

Open source EV controller? Try the Open Source Motor Controller. I'm a member of the osmc Yahoo group that started this, but I think it's easier to go and see robotpower to actually see what's available, since they build the units and sell them.

http://www.robotpower.com/osmc_info/