Making my own electric car.....

[Yellow73SB]

I'm 6'2

:sweat:

And I think I'm still getting taller. I hope I don't get much taller though

How old are you?

I was 6'2" when I graduated from High School..............
then I grew another 2"...............became a bean pole...
wasn't till after I got married at 26 did I start gaining any weight.

17......................( ahd to make it 10 characters)

 

[mrvette]

http://www.teslamotors.com/

If this was 1/2 the price, I would finance one.

Tell you what, like to have that damn motor they using there.....

it's sheer size makes me wonder about how effective two golf cart motors will actually BE.....

 

[big2bird]

http://www.teslamotors.com/

If this was 1/2 the price, I would finance one.

Tell you what, like to have that damn motor they using there.....

it's sheer size makes me wonder about how effective two golf cart motors will actually BE.....

They are claiming 240 HP, That would have to be RWHP at gear reduction. A 200 HP motor 3 phase would be quite heavy. They are stating 115 lbs.

 

[big2bird]

http://www.teslamotors.com/

If this was 1/2 the price, I would finance one.

Tell you what, like to have that damn motor they using there.....

it's sheer size makes me wonder about how effective two golf cart motors will actually BE.....

They are claiming 240 HP, That would have to be RWHP at gear reduction. A 200 HP motor 3 phase would be quite heavy.

185kw=248HP=480volts x 580Amps @ .65 eff

 

[turtlevette]

it's sheer size makes me wonder about how effective two golf cart motors will actually BE.....

duh, refer to post 3.

I don't TRY to be an *******. I'm really trying to help.:goodevil:

 

[big2bird]

it's sheer size makes me wonder about how effective two golf cart motors will actually BE.....

duh, refer to post 3.

I don't TRY to be an *******. I'm really trying to help.:goodevil:

Jim, If I want an electric car, I'll wait for the Volt.
It would be nice to convert an S-10 to electric. A/C would be the way to go, as it is brushless, but a 100HP freq drive is $$$$$. Hell, even a 40HP freq drive is $$$
The whole 185KW=110lbs doesn't add up, unless they are using the 14-1 low speed to calc. But THAT still doesn't make since. Even overdriving the freq to 90 or even 120htz.

 

[big2bird]

The whole 185KW=110lbs doesn't add up, unless they are using the 14-1 low speed to calc. But THAT still doesn't make since. Even overdriving the freq to 90 or even 120htz.

Unless they are using pk hp at locked rotor current. That would divide the current by 6 (approx)
That might put it at 60 HP, maybe 110 lbs with alum windings/ case.

 

[turtlevette]

if they have some way of increasing the voltage, that would allow the motor to be very compact and lightweight.


maybe when you step on it the voltage goes up to 2000 volts.

like a gas engine, it only needs to produce max hp for a short time.

For Gene to have any chance to make 2 golf cart motors move a passenger car, he could quadruple the voltage during acceleration then go back to rated voltage at cruise. For something that doesn't get used much it would probably hold up.

 

[big2bird]

Yes and no. higher voltage=less amperage per HP.
A/C motors react to freq. 13,000 rpm at 120 Htz would be a 6,000RPM base speed.
It's 3 phase, 4 pole (They state)
I'd love to see a schematic of the drive unit(Controller)

 

[big2bird]

For Gene to have any chance to make 2 golf cart motors move a passenger car, he could quadruple the voltage during acceleration then go back to rated voltage at cruise. For something that doesn't get used much it would probably hold up.

That might work with a DC motor. Speed varies by voltage.

 

[turtlevette]

Yes and no. higher voltage=less amperage per HP.
A/C motors react to freq. 13,000 rpm at 120 Htz would be a 6,000RPM base speed.
It's 3 phase, 4 pole (They state)
I'd love to see a schematic of the drive unit(Controller)

2 pole motors run at 3600 rpm at 60 hz. 4 poles cuts the speed in half then doubling the freq puts you right back at 3600 rpm.

 

[big2bird]

Then their solution must be 600hz tech, like aircraft. Only way to get that RPM with a 4 pole.

 

[turtlevette]

Then their solution must be 600hz tech, like aircraft. Only way to get that RPM with a 4 pole.

or a 2:1 first gear and 4:1 second gear

edit: sorry that doesn't make any sense.

you're right they must be varing the frequency and it must get up to 450 or 500 hz

 

[big2bird]

Look at their torque curve. Since torque drops off above "base speed". I think it's 600 hz with a base speed of 300 hz.
http://www.teslamotors.com/performance/acceleration_and_torque.php

 

[mrvette]

Look at their torque curve. Since torque drops off above "base speed". I think it's 600 hz with a base speed of 300 hz.
http://www.teslamotors.com/performance/acceleration_and_torque.php

I thought aircraft were 400 hz, WW2 stuff was anyway.....

not that it matters, all this stuff jack the price up to WAY in hell over 2 grand.....law of diminishing returns then.....

 

[big2bird]

I thought aircraft were 400 hz, WW2 stuff was anyway.....

I think your correct. I haven't done any high frq stuff in a long time. I do know the rules change. Mucho impedence in a circuit.

 

[mrvette]

I thought aircraft were 400 hz, WW2 stuff was anyway.....

I think your correct. I haven't done any high frq stuff in a long time. I do know the rules change. Mucho impedence in a circuit.

OH hell yes, any ET can tell you about weird **** happening to any coil/iron frame anything when various a/c freqs are applied to it....

much less if you hit it with square waves......more ringing than a cathedral bell.....

but I am somewhat surprised at the sheer SIZE of that motor, it looks huge, and even with aluminum windings....that's a lot of iron I can imagine the heat sink necessary to cool the main switch pass devices, assuming it's an a/c motor.....with a Variable Freq Oscillator to drive it....kinda like a PWM type thingy allmost.....

trying to dupe that in a home garage is allmost impossible, and certainly not cost effective.....UNLESS I wuld find a similar motor from someplace for cheeeep....from it's appearance it drives into a normal diffy...I can't see any other way to drive two wheel without one.....which is why I was thinking of my two golf cart motors...one on each wheel in the rear...NO diffy....

let the motor drag even it out...figger the amount of left/right turns will balance out.....:thumbs:

 

[big2bird]

How about a porsche?

http://www.electricvehiclesusa.com/category_s/255.htm

 

[big2bird]

Gene,
Find out if these golf cart motors are shunt, series, or compound wound.
Largest Golf Cart motor I've found is 10HP.

 

[mrvette]

Gene,
Find out if these golf cart motors are shunt, series, or compound wound.
Largest Golf Cart motor I've found is 10HP.

I would hope they are PM fields, hell with that field winding....

not sure about compound wound forget what that means....

course a shunt field....limited current but then you have the armateur still drawing current...not going to work....breifly thought of reversing the alternator regulation practice....

I will get some information from Johnny my welder and get back on this...

 

[kwplot34]

Gene i found the perfect car for you,either drive it as is,or its small enough to convert to electric,and i'm pretty sure you can pick it up or one like it cheap.
http://www.gaz24.com/e107_plugins/content/content.php?content.7

 

[SmokinBBC]

I wonder what motor they are using for this.

http://www.foxnews.com/story/0,2933,369581,00.html

 

[mrvette]

I wonder what motor they are using for this.

http://www.foxnews.com/story/0,2933,369581,00.html

Some one get me one of those motors for production cost....about 200 bux or so...and I"M IN.....but to state again, the entire car has to be about 2 grand OR LESS...

I have a line on a Saturn, about '94 or so....350 bux...2 dr....

dunno yet...taking too long to find out about golf cart motors....


:nuts:

 

[kwplot34]

I wonder what motor they are using for this.

http://www.foxnews.com/story/0,2933,369581,00.html

Some one get me one of those motors for production cost....about 200 bux or so...and I"M IN.....but to state again, the entire car has to be about 2 grand OR LESS...

I have a line on a Saturn, about '94 or so....350 bux...2 dr....

dunno yet...taking too long to find out about golf cart motors....


:nuts:

Hey you old Coot i posted a link above to a cheap car prrtt:

 

[mrvette]

I wonder what motor they are using for this.

http://www.foxnews.com/story/0,2933,369581,00.html

Some one get me one of those motors for production cost....about 200 bux or so...and I"M IN.....but to state again, the entire car has to be about 2 grand OR LESS...

I have a line on a Saturn, about '94 or so....350 bux...2 dr....

dunno yet...taking too long to find out about golf cart motors....


:nuts:

Hey you old Coot i posted a link above to a cheap car prrtt:

NOT quite what I had in mind...copy of what?? a '64 Fairlane?? something....

too heavy, by a wide margin....tempted to pick up this Saturn just for grins....

350 bux, if it's not badly torn up.....:bump:

 

[kwplot34]

No not a ford fairlane :lol: it's a Russian car,a Volga,i think thats what they call it.
Damm try to help you out,and you totaly Diss me

 

[mrvette]

No not a ford fairlane :lol: it's a Russian car,a Volga,i think thats what they call it.
Damm try to help you out,and you totaly Diss me

Hey man, the Russkies just copied old American car designs and did their own thing never changing a dam thing for design sake....

methinks it a knock off of a Fairlane?? pretty sure....

:drink:

 

[kwplot34]

It was quite interesting reading about the cars made in Russia,how they copied the ford motor design,and their V-8 is a replica of a ford V-8. And talk about technology challenged,they are at least 50 years behind,but it was still good reading material. There car body design's used a lot of Chrysler designs.I realy like how all the cars have a front seat that folds into a bed,i guess they want you to be comfortable when the POS breaks down in the middle of nowhere :banghead:

 

[mrvette]

The golf cart guy finally got back from vacation, and wants 250 for the motors, and another 200 or so for the drive axels....so that's a grand right there....

I dunno....going to have to talk to him....personally, not relay messages over the phones...

 

[saudivette]

This any help?