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Topic: My electric motor  (Read 3123 times)

Offline Smelly_Cat

My electric motor

« on: June 03, 2008, 08:06:11 PM »
I have this lift truck motor  but cant figure out how to connect it  to my tranny,  Any Ideas,  It does not have a motor shaft



Offline Ret.Bugtech

My electric motor

« Reply #1 on: June 04, 2008, 08:05:31 AM »
It appears that you are going to have modify the mainshaft from your transmission to fit the splines of the electric motor then come up with way to mount the motor to the transmission itselve. You are on your on. :roll:

Offline Smelly_Cat

My electric motor

« Reply #2 on: June 04, 2008, 09:00:07 PM »
It would be cool of I could get a sleeve to fit over the transmission shaft that would fit in to this thing.

I need to get a broke transmission to figure out what size every thing needs to be,  Anyone have a toasted or flambe'd transmission I can use for R&D?  SC

Offline Zen

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My electric motor

« Reply #3 on: June 04, 2008, 10:38:02 PM »
I had a bunch of trashed tranny's that I gave away a while back.  You are the third person in the last month that has needed one.  This is why I'm a pack rat . . . keep it forever and no one will ever need it . . . throw it out and everyone will need it.  I need a bigger garage!

If you can get your hands on a transaxle, take it and the motor to a good machine shop . . . most GOOD machine shops should be able to fabricate you a plate to mount the motor on the tranny and a shaft or sleeve to couple them together.

One of our electricians at work was talking to me yesterday.  He has purchased an old Beetle to convert to electric.  He said he can buy a motor and drive and everything else for the converstion for around $1500 new . . . well, everthing but the batteries.  He said that with the motor and controller he's going to use, he will be able to run at interstate speeds.  He said that all the kits he's seen use bigger motors because they only use one gear, but that with his setup, he'll be able to shift the transmission, even though it won't have a clutch.  I think he said he was going to use 8 golf cart batteries and that should get him between 80 - 100 miles of range.

I can't wait to see a home-built EV running up and down the road . . . I'll provide the encouragement . . . then copy y'all's set-up when you get the bugs worked out!   :wink:    8)

Offline Ret.Bugtech

My electric motor

« Reply #4 on: June 05, 2008, 08:08:01 AM »
Standing by.   Good luck !! 8)  8)

Offline Ret.Bugtech

My electric motor

« Reply #5 on: June 05, 2008, 08:17:28 AM »
Maybe I missed something.   How is he going to shift gears without a clutch of some kind. ?

  The transmission doesn't care or know whats pulling it at speed.  Is he going to use the " get home with the broken clutch cable" trick?

Offline Zen

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My electric motor

« Reply #6 on: June 05, 2008, 03:13:01 PM »
He was talking way over my head about a programable contoller for the motor . . . It sounded to me like it would automatically speed up or slow down the motor to match it the tranny speed when shifting . . . I can see that, but what I didn't understand was how the controler was going to know WHEN to speed up or slow down for you to shift.  But again, he's an electrian/electronics guru and he was talking way over my head most of the time.

Offline Ret.Bugtech

My electric motor

« Reply #7 on: June 05, 2008, 04:33:04 PM »
It seems that the controler would have to react mighty fast and absolutey perfect on speed changes to keep from "hammering" on the synchro-rings.
   
      Zen I'm going to PM you a idea for this. This just might work if nobody else has thought about it.

Offline Zen

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My electric motor

« Reply #8 on: August 05, 2008, 02:38:43 AM »
I've done a little more research (reading stuff on the internet; at least half of it written be someone who probably new nothing about subject  :roll:  ) on electric cars and it seems that the best approach is to use a manual transmission and no clutch.  An electric motor has less rotating mass than a gas engine and that mass is free-wheeling when cut the power to it so a clutch isn't necessary.  At least, that's the popular theory.

I don't know.  Still seems to me that shifting without a clutch would be rough on the syncros.  One thing in your favor is you wouldn't have to do as much shifting with an electric motor.

By the way, did you know that you can get fuel cells that are a direct replacement for industrial lead/acid batteries?  We are looking into them at work for our 24 volt electric pallet trucks . . . it's a big initial investment, but it looks like the long-term cost are as good, if not better than traditional batteries.  The big benefits are you don't have to charge batteries . . . about 30 seconds to refill with hydrogen and you're back on the road . . . and the voltage is constant from start to finish . . . and a tank of hydrogen runs longer than a charged battery.  All of this is according the folks selling the systems, so I'm still not 100% sold . . .

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