AC Motor

I'm slightly confused on to what you're trying to acomplish.

You can easily put a single or 3 phase AC or DC motor into an existing vehicle with a little bit of fabrication work, and there are hundreds of controller possibilities to drive said motor. You may be better off just scrapping the existing transmission, since it doesn't offer any significant advantages like it does to a gas motor.

Why do you need a DC starter? The controller is more than capable of bringing the AC motor from stopped to 1000rpm on its own.

Whats powering the generator?

The AC motor can't power its own generator, that goes into the realm of perpetual motion machines, which dont work because of frictional losses

maybe because there are no AC Batteries? So you would have to change DC from the batteries to AC and then power the motor which means loss

I can't BELIEVE this... Only *2* posts in response to this...

...with "Guest" having left himself WIDE-OPEN to all kinds of Cynical-Edumacashun...!?!

How about: "Who in the world wants to have to exit their vehicle, run BACK a kilometer to unplug it, then run FORWARD another km to plug it back in ... then BACK to the car before being able to drive another minute-or-so"...?!

True, ac motors are very efficient nowadays, but, guess what... there are dc motors that exhibit so-close-to 100% efficiency, the difference hardly matters, considering that inverters are NOT so efficient... And, as Epke already stated, battery technology is ALL geared towards dc. [and let's not even GO the direction of the "Universal-wound-motor", please...!]

My prayers continue --- that CR4 get around to MANDATING an honest-to-goodness registration on this site before permitting posts. It don't cost a plug-penny, and guarantees the person is (at least 'likely') gonna return to review his responses.

Otherwise, I foresee our CR4 daily mailings becoming inundated / overflowing with routine posts like this one, asking ... well ... THIS caliber of question. Let's do all we can to encourage people to at LEAST 'Google' something ... maybe even read a 'Wiki' page or two ... before posting such rudimentary/elementary questions.

'nuf said

AC BAttery?

Input? Process? Output?

Why can't a variable speed AC Motor be built to replace a gas motor in a car or truck? it can: http://www.uqm.com/

Now my turn: WHERE the flip will the AC come from?

milo

D'OH...

well... "alMOST d'oh"...

I was gonna type, here, "I stand corrected...this kind of error is what happens after one has stayed out-of-the-loop in a particular field for more than a few years"...

But then, I perused the site www.uqm.com ... and all I see are DC motors ... no ac

http://www.uqm.com/propulsion_specs.php

??? Where are they ???

Well, the point was the substitute of variable speed for gas motors. I had stock in this company and have been impressed with their projects, but to the "ac point", well, your're right of course.

Now if I was Del, I'd say something like "Slaps furry head with paw" or something like that. Alas, I am not del, i am milo. (But I do have a cross bow, so ....)

Thanks for the correction.

milo

aka homer on the subject of wall electricity vs battery electricity

"Aw , well..." you know I just like to keep things on the straight-and-narrow...

Hope ya did well with the stock (you did state that in the past tense).

"PS" --- mind if'n I borrow Homer from you? Could have used him, posting on this one.

{you're welcome to beat me to it...}

You may use Homer. He'll appreciate more opportunities to find donuts...

I sold UQM when i started to fall in love with it. Dangerous attitude.

It and another stock were 10% of my investment fund that I get to Play with. That 10% out performed the other responsibly allocated 90% by quite a bit.

But overall return was over 15% so YAy.

Glad that you are keeping things on the straight and narrow, even if it was me that needed a "tip."

Is it just me, or is this website acting wierd today?

milo

In spite of what others may write or think, using AC motors is not only possible, but is becoming the norm in manufactured electric vehicles. The biggest selling (partly) electrically powered vehicle, the Prius, uses an AC motor. The Indian Reva also uses an AC motor, having converted from DC motors fairly recently. The Tesla is also driven by an AC motor.

The controllers for DC motors are already fairly complicated, with the output being pulsed at 15,000 Hz or so. The technology for AC VFD's has been available in industry for decades, and typically, these use DC (rectified from an AC source) as an intermediate step in providing variable frequency AC to the motor.

The generator and starter would be of no use, and the only generating to be done on board would be through regenerative braking -- but that generating is naturally done by the traction motor itself.

... So the AC motor makes sense. The rest sounds like a perpetual motion machine.

"I stand corrected...this kind of error is what happens after one has stayed out-of-the-loop in a particular field for more than a few years"...!

Well done, Ken ... I'm simply blown-away to see that.

Having grown-up studying these things while winding coils (GE) for walking drag lines, Navy sub motors, etc. , and subsequently rewinding an incredible variety of such animals, I ought to have expected such possibilities(!)

Next time I'll do more 'homework', before opening mouth / inserting foot!

Most of the major auto manufacturers back in the days of EV, GM, Ford, Chrysler used ac motors.

If you want something cool and fast use this system, it has been tried and proven

acpropulsion.com