DIY Electric Car Forums - Electric Motors

DIY Electric Car Forums - Electric Motors http://www.diyelectriccar.com/forums ADC, Netgain (Warp), AC, DC, Forklift and more en Fri, 20 Nov 2009 23:44:01 GMT vBulletin 60 http://www.diyelectriccar.com/forums/images/misc/rss.jpg DIY Electric Car Forums - Electric Motors http://www.diyelectriccar.com/forums Any CalMotors experience? http://www.diyelectriccar.com/forums/showthread.php?t=38726&goto=newpost Fri, 20 Nov 2009 22:07:21 GMT Has anyone laid hands upon, and what feedback do you have regarding? Has anyone laid hands upon, and what feedback do you have regarding? ]]> Electric Motors RupertWild http://www.diyelectriccar.com/forums/showthread.php?t=38726 Quadratic relationship between amps and torque? http://www.diyelectriccar.com/forums/showthread.php?t=38642&goto=newpost Wed, 18 Nov 2009 18:34:30 GMT I have one of the big 13" GE motors talked about recently on this site. Here is the tag:

My first questions are about the relationship between amps and torque:

1) I have heard it referred to as a "Quadratic relationship". My interpretation of this is that if I take the labeled 467 amps and double them I get 4 times the labeled torque of 140 ft/lbs (560 ft/lbs). Is that correct?

2)If my reasoning is correct in question 1, then what happens when you triple the label amps? Do you get 9 times the label torque (1260 ft/lbs)?

My next question is about saturation. I have read that the relationship for amps/torque goes linear after motor saturation.

a) What would be a good estimate for how many amps a motor of this size can handle before saturation?

My third, and final batch of questions are about the volt requirements to make a motor run at that many amps.

-Is that relationship linear? For example-if I double the volts do I get twice the amps (and 4 times the torque) at the same rpm?

-What happens if I triple the voltage?

-If I double the voltage do I now get the label torque at 4 times the label rpm?

Thanks, I hope at least some of my reasoning is valid. :) ]]> Electric Motors Batterypoweredtoad http://www.diyelectriccar.com/forums/showthread.php?t=38642 600 series outrunner motor from EnerTrac http://www.diyelectriccar.com/forums/showthread.php?t=38486&goto=newpost Sat, 14 Nov 2009 15:24:01 GMT Introduction: I have been designing a large hub motor or outrunner motor for motorcycle applications for almost two years. I have done most of... Introduction:
I have been designing a large hub motor or outrunner motor for motorcycle applications for almost two years.

I have done most of the development in a open forum call Endless Sphere
http://endless-sphere.com/forums/vie...hp?f=10&t=7718

The motor is a true 10KW motor 30KW peak 3 phase WYE connected 24 pole Brushless motor

I not on this thread to sell anything as i didn't on the Sphere but to discuss design and application ideas for the motor.

I know the motor has application for cars and have sold a few for small cars already, those projects are just beginning.

For starters I prefer to use the motors inboard and retain a cars brake and supension system as much as possible by connecting to the front axles through the CV joints. Though one of my first car customers are going to use the motor as a wheel motor.

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]]> Electric Motors markcycle http://www.diyelectriccar.com/forums/showthread.php?t=38486 lookin for info http://www.diyelectriccar.com/forums/showthread.php?t=38309&goto=newpost Mon, 09 Nov 2009 02:09:46 GMT new guy on the block here wondering if any body would be able to help me out
I have acquired a hyster forklift mod #b108t01575z ond I'm lookin for motor specs
also wondering where to get a relatively inexpensive variable speed controller
because I believe this forklift is only A two speed but please correct me if I'm wrong ]]> Electric Motors blainerf http://www.diyelectriccar.com/forums/showthread.php?t=38309 replacing a lightweight 50hp ultralight engine? http://www.diyelectriccar.com/forums/showthread.php?t=38291&goto=newpost Sun, 08 Nov 2009 07:44:14 GMT I'm new here, howdy all!

I've been reading as much as I can, just getting started in EV.
I'm interested in replacing my 50hp ultralight aircraft IC engine
with electric. It currently runs max RPM at 6500 at the engine
with a 2.6 to 1 gearbox.

We are all familiar with the ElectraFlyer project and apparently someone
said he used a Lynch motor in a direct drive scenario but he was only pushing 18hp.

While I realize I dont need a motor with 50hp, I'm having trouble
locating (affordably) a motor with the best power density that I
can still get reasonably priced. Direct drive preferred but belt drive
is acceptable as I have the room.

Any suggestions on a motor? (brushless yet?) I realize batteries
are a whole seperate headache due to the weight, but if anyone
gets on a roll i'm all ears for battery recommendations too.

Take care all, this should be a fun project if I can ever get the dollars
to pencil out reasonably.

Thanks!
~WildirishTime ]]> Electric Motors wildirishtime http://www.diyelectriccar.com/forums/showthread.php?t=38291 Trimming the Fat. http://www.diyelectriccar.com/forums/showthread.php?t=38288&goto=newpost Sun, 08 Nov 2009 04:49:24 GMT Can motors be lightened up a bit?

I'm mainly referring to series wound DC motors since that is what I'll be using. I know the all the copper is there for a reason, how about all the steel? I'm guessing the steel housing size is selected by the manufacturer from some commercially available pipe size and wall thickness that will accommodate the internals and end bolt threads. If I wanted to trim some off the outside are there any negative consequences to performance?

I've been working very hard and spending a bit of money to trim a pound here and there, so if I can trim more than a few pounds off the motor I'll probably do it. ]]> Electric Motors bipole http://www.diyelectriccar.com/forums/showthread.php?t=38288 HI pa drive in wheel motors http://www.diyelectriccar.com/forums/showthread.php?t=38246&goto=newpost Fri, 06 Nov 2009 18:22:23 GMT hi, im new to this forum, anywayz the reason im her is that i am curently doing a research project and was interested in the PML hi-pa drive hub... hi, im new to this forum,

anywayz the reason im her is that i am curently doing a research project and was interested in the PML hi-pa drive hub motors, so i found out the specs n stuff but am unable to find the dimensions for the blessed motor,
they have posted a a engineering drawing but its in a horribly low resolution,

so my qeustion is does anyone know the dimensions of their motors, ive include the drawing and the link to it below....

http://www.pmlflightlink.com/motors/hipa_drive.html

any help would be greatly appreciated, many thanks in advance

:p:p:p:p:p:p:p:p:p:p

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]]> Electric Motors isabella http://www.diyelectriccar.com/forums/showthread.php?t=38246 How to Extrapolate Motor Data? http://www.diyelectriccar.com/forums/showthread.php?t=38232&goto=newpost Fri, 06 Nov 2009 13:53:53 GMT Hello,

I am trying to figure out motor data based on the motors spec sheet, but the spec sheet says the motor was dyno'ed at 72V. I want to know what the motors performance at 149V would be. The motor is question is a Warp 11, But I hope to apply this to more motors.

My questions are:

1. Is torque a product of wattage, or just amperage? My logic tells me that torque is equal to the wattage going through the coils. For example: the Warp 11 shows 10 ft.-lbs. of torque at 96.8A and 72V, which is 6.97KW. To achieve the same wattage at 149V, the amperage would be 46.8A. If this is correct, that would mean that at 218.8A and 149V, you would have the 135 ft.-lbs. of torque, And 452.8A would yield 279.4 ft.-lbs. of torque.

2. They show on the graph that the H.P.e (electrical horse power) is 9.3 at 72V and 96.8A. Next to that, They show H.P.m (mechanical horse power?) being 7.5. How do I calculate this?

3. On the graph, it shows at 10 ft.-lbs. and 72V, the RPM of the motor is 3919. I understand that increasing the voltage will also increase the RPM, but how do i compute the higher RPM? If I double it, due to twice the voltage, the RPM is over the motors rated 5500 RPM....Im confused on what to do here.

Well I think thats all I got for now. Hope somebody can help me out.

-Adam ]]> Electric Motors adamj12b http://www.diyelectriccar.com/forums/showthread.php?t=38232 Brush Advance - when, how much, and what to expect? http://www.diyelectriccar.com/forums/showthread.php?t=38172&goto=newpost Wed, 04 Nov 2009 19:55:16 GMT I had valuable advice from Jim HT, but I'd like to get my head around the subject better.

Using forklift motor, and running 72v system. Done 3-5 degrees of advancement, but cant' understand - did the current go up at 2-3 kRPMs?
What to expect, and how to do tuning here? Meaning how to understand result of advancement by driving and observing speed, voltage, rmp and Amps? ]]> Electric Motors Stunt Driver http://www.diyelectriccar.com/forums/showthread.php?t=38172 Overvolting Golf Cart Motor http://www.diyelectriccar.com/forums/showthread.php?t=38162&goto=newpost Wed, 04 Nov 2009 16:54:11 GMT I was wondering if anybody has overvolted a golf cart motor before?? I have a golf cart that is just a fun little project. I use it for yard work... I was wondering if anybody has overvolted a golf cart motor before??

I have a golf cart that is just a fun little project. I use it for yard work and mostly riding it around the woods like a go kart.

I am looking into replacing the batteries with 12V ones to increase the voltage to 72V. What I have found is that they will usually stay together at these voltages. my question is, Do you think it would stay together at 96V? I believe with a little work and some welding of a new battery tray, I can fit the 2 extra batteries needed to make it 96V. I have built the controller that is installed and it can handle alot more then 96 so im not worried about that.

What do you guys think?

-Adam ]]> Electric Motors adamj12b http://www.diyelectriccar.com/forums/showthread.php?t=38162 type motor/clutch for chain drive http://www.diyelectriccar.com/forums/showthread.php?t=38123&goto=newpost Tue, 03 Nov 2009 22:04:04 GMT I am building a 3 wheeled EV motorcycle married to a quad w/metro car parts. I want to use a chain drive the rear wheel. Does anyone have info on... I am building a 3 wheeled EV motorcycle married to a quad w/metro car parts. I want to use a chain drive the rear wheel. Does anyone have info on what type motor could be used and if I would need a torque converter or if a multispeed motor might work. I would like to utilize a used forklift drive motor and attach motor cycle chain drive or maybe transmission to the EV motor drive shaft but don't know if trans could take the instant torque. I must admit I am brand new to EV power and any info is appreciated. :confused: ]]> Electric Motors mastiff1 http://www.diyelectriccar.com/forums/showthread.php?t=38123 Prestolite ASDA4004 AC motor specs/performance ? http://www.diyelectriccar.com/forums/showthread.php?t=38066&goto=newpost Mon, 02 Nov 2009 18:14:10 GMT I'm new to the EV world. I bought a unfinished project see here http://www.diyelectriccar.com/forums...-ac-38064.html

I've got some specs about the motor but since I'm a newbie, I don't know if everything I need is there.

ASDA4004
15.5 KW
3 o
30.3 V
405 A
90 Hz
1735 rpm
cos 0 0.831
Duty S2-60 minutes

With the information above, can I know how many "poles" the motor have ?

According to that pic:

Is 1735 rpm the maximum RPM or I can go higher ?

:confused: thank you ]]> Electric Motors SyCo http://www.diyelectriccar.com/forums/showthread.php?t=38066 <![CDATA[Extended shaft ADC 8"]]> http://www.diyelectriccar.com/forums/showthread.php?t=38051&goto=newpost Mon, 02 Nov 2009 02:00:27 GMT I am looking for (but cannot find) an extended shaft (2.5") ADC 8" motor. Its for a belt drive reverse trike and I need the longer shaft legnth to mount the drive pulley to. ]]> Electric Motors JRitt http://www.diyelectriccar.com/forums/showthread.php?t=38051 What are these motors? http://www.diyelectriccar.com/forums/showthread.php?t=38031&goto=newpost Sun, 01 Nov 2009 01:17:27 GMT Just curious really, when I found these on Ebay, as to what sort of motors they are and if they have any EV uses. Emco GNAFF 100... Just curious really, when I found these on Ebay, as to what sort of motors they are and if they have any EV uses.
Emco GNAFF 100
DC machine motor
Fanuc Model 3

As I say, just curious.

I also found one for those who are looking for a HP rating to match their ICE.
50hp DC motor:D ]]> Electric Motors Woodsmith http://www.diyelectriccar.com/forums/showthread.php?t=38031 Another Big Ole Motor on Ebay!! http://www.diyelectriccar.com/forums/showthread.php?t=38003&goto=newpost Sat, 31 Oct 2009 00:41:40 GMT Hey, Dude has yet ANOTHER one of them big ole 13 inch motors on ebay for cheap!! I have always loved to have one of these but I have not boughton... Hey, Dude has yet ANOTHER one of them big ole 13 inch motors on ebay for cheap!!
I have always loved to have one of these but I have not boughton yet. My mone got to get right first... ]]> Electric Motors Georgia Tech http://www.diyelectriccar.com/forums/showthread.php?t=38003