DIY Electric Car Forums

DIY Electric Car Forums - Controllers http://www.diyelectriccar.com/forums Alltrax, BelkTronix, Curtis, Kelly, Zapi, Zilla, Home-brew/custom and more en Sat, 21 Nov 2009 03:43:39 GMT vBulletin 60 http://www.diyelectriccar.com/forums/images/misc/rss.jpg DIY Electric Car Forums - Controllers http://www.diyelectriccar.com/forums i need help tell how many amps and volt i can put to my motor http://www.diyelectriccar.com/forums/showthread.php?t=38479&goto=newpost Fri, 13 Nov 2009 23:53:57 GMT i just bought a 13 inch diameter 25 inch overall length and 18.5 inch length it came off of a 8000 lbs Clark forklift i would like to now how many... i just bought a 13 inch diameter 25 inch overall length and 18.5 inch length
it came off of a 8000 lbs Clark forklift
i would like to now how many amp i might be able to put to the motor without worrying and how much i can peak at for a short time
and what voltage can i run it at before it arcs
this information is to help me pick a controller and a car or truck
it also would be nice if someone could tell me about advicing electric motors
thank you ]]> Controllers boyaka http://www.diyelectriccar.com/forums/showthread.php?t=38479 Logisystems still turning my motor? http://www.diyelectriccar.com/forums/showthread.php?t=38323&goto=newpost Mon, 09 Nov 2009 13:08:30 GMT So I parked my vehicle after a 20 mile soujorn. Everything worked great, a wonderful field test for the car. I park the car, take it out of gear... So I parked my vehicle after a 20 mile soujorn. Everything worked great, a wonderful field test for the car.

I park the car, take it out of gear and engage the parking brake.
But I don't turn off the main power, the contactor.
I can here noise under the hood, almost like newer cars that will continue to cool after they have been turned off.
I pop the hood and the controller fans are still on of course because I haven't turned off the 12volt circuit, also the main contactor is still engaged,but theres definitely another sound in there.
I look down the side of the motor and there the second shaft on the motor is turning!
Now like I say the car is not in gear ,I'm not pressing anything and as I'm watching the motor is turning fairly quickly, slowing down bit by bit.
I get in the car, turn off the contactor and the motor stops.
Turn on the contactor, the motor starts where it left off.

Is this normal? Is this some kind of cooling thing in the Logisystem controller, caps discharging?

Or could this be a sign of the potbox still engaged or some such.

Please let me know your thoughts,

Sincerely

Roy ]]> Controllers voltmatic automaton http://www.diyelectriccar.com/forums/showthread.php?t=38323 is this my controller? http://www.diyelectriccar.com/forums/showthread.php?t=38265&goto=newpost Sat, 07 Nov 2009 07:04:27 GMT my ford ranger was converted in 1996 and I believe that is my controller, it doesn't look like any of the once you can find online. Or maybe my real controller is hiding somewhere?
I just assumed that it is a very old style of controller. Am I right?

Now the question is: should I replace it? if so, with what?
what would I gain by replacing it?

any help would be greatly appreciated.

Attached Images

IMG_0053.jpg (93.3 KB)

]]> Controllers Evford http://www.diyelectriccar.com/forums/showthread.php?t=38265 how many amps SHOULD a 1221 allow? http://www.diyelectriccar.com/forums/showthread.php?t=38158&goto=newpost Wed, 04 Nov 2009 15:56:40 GMT I have a curtis 1221, ADC 8" motor, and 96v FLA battery pack. It runs 'fine', but I notice that even when I have accelerator 'floored' it almost never goes over about 350amps, and seems to have one little 'bump' in the curve as it runs up through revs where it briefly jumps to 375a, and then settles back to 350 or so under full acceleration.

The 1221 does not appear adjustable in any way, but I am wondering if this is all I can get out of it? ]]> Controllers dtbaker http://www.diyelectriccar.com/forums/showthread.php?t=38158 Curtis 1238 AC controller setup http://www.diyelectriccar.com/forums/showthread.php?t=38069&goto=newpost Mon, 02 Nov 2009 19:51:13 GMT I'm new to the EV world. I bought a unfinished project see here http://www.diyelectriccar.com/forums/showthread.php/2002-accent-48v-15-5kw-ac-38064.html

I've got some specs about the motor and the controller but since I'm a newbie, I don't know if everything is setup correctly.

***Controller AC***
Curtis 1238-5601
36-48V
650A (2 min)
210A (1 hour)
User manual -> http://www.uqac.ca/~riceazar/1234_36...uly11_os11.pdf

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

The thing I want to know is about Initial motor setup. At page 75 they talk about "AC Motor Characterization procedure" to learn the motor parameter that I don't have. It is also written to contact Curtis, which I did, but they told me:

Quote:

Please consult your local dealer/distributor who sold the system to you. They would be better suited to support your requirements.

The base settings for the motror are defined at page 62. So I just want to know if I need to care about those or not ? Currently the motor is working but I just want to be sure everything is find. ]]> Controllers SyCo http://www.diyelectriccar.com/forums/showthread.php?t=38069 underpower controller??? http://www.diyelectriccar.com/forums/showthread.php?t=37972&goto=newpost Fri, 30 Oct 2009 03:39:14 GMT This is kinda a strange question and i think i know the anwser but would like to hear from someone smarter than me:).I have a 72volt system on a... This is kinda a strange question and i think i know the anwser but would like to hear from someone smarter than me:).I have a 72volt system on a sandrail and doing some "testing"with power and range.it has great power and "decent" range kinda hard to test with the cooler than ideal temp lately.currently using 12v lead deep cycles.
question is the controller is "set " for this system but could i run it at 48volts just to see power and range at 48v.
it is a Altrax ,the motor is 48-72volt
so im thinking running it w/48v of battery is same as using 3/4 throttle at 72 volt so the controller should be ok but would rather not chance it just for "testing"
thoughts?need more info?
thanks ]]> Controllers everanger http://www.diyelectriccar.com/forums/showthread.php?t=37972 DIY no micro, current-limited controller http://www.diyelectriccar.com/forums/showthread.php?t=37950&goto=newpost Thu, 29 Oct 2009 15:34:23 GMT Use at your own risk! I use this circuit with a 36V, 500W watt motor. Use at your own risk! I use this circuit with a 36V, 500W watt motor.

Attached Files

Current_limited.pdf (46.0 KB)

]]> Controllers jrc01 http://www.diyelectriccar.com/forums/showthread.php?t=37950 Snubbers http://www.diyelectriccar.com/forums/showthread.php?t=37937&goto=newpost Thu, 29 Oct 2009 10:29:16 GMT Not sure if i'm asking this in the right part of the forum. I've built an igbt based controller and i'm noticing some fast voltage spikes between collector and emitter at turn off. Magnitude of about 1.5 times vbat.Just wondering if an snubber of some form across the igbt would be good practice or any other ideas? Would these spikes be the result of the freewheel diode not doing its job or being an incorrect recovery type? ]]> Controllers jackbauer http://www.diyelectriccar.com/forums/showthread.php?t=37937 Curtis 1231c on eBay http://www.diyelectriccar.com/forums/showthread.php?t=37896&goto=newpost Wed, 28 Oct 2009 02:55:38 GMT If anyone is interested... Also, I wouldn't mind dealing off-site if you have an offer...

Item 180425062539

http://cgi.ebay.com/ebaymotors/ws/eB...CA:MOTORS:1123 ]]> Controllers jyanof http://www.diyelectriccar.com/forums/showthread.php?t=37896 current limiting controller question http://www.diyelectriccar.com/forums/showthread.php?t=37884&goto=newpost Tue, 27 Oct 2009 20:27:18 GMT Here is a newbie question: Lets say that we have a PWM controller that is current limiting. What is the purpose of the current limiting? Is it to... Here is a newbie question:

Lets say that we have a PWM controller that is current limiting. What is the purpose of the current limiting? Is it to protect the MOSFETs in the controller or the motor?

Thanks ]]> Controllers az_tom http://www.diyelectriccar.com/forums/showthread.php?t=37884 Curtis 1231C Control Wiring Fuse http://www.diyelectriccar.com/forums/showthread.php?t=37867&goto=newpost Tue, 27 Oct 2009 07:28:08 GMT Hi all,

On page 12 of the Curtis Motor Controller Manual there is a paragraph about "Control Wiring Fuse". The paragraph says a 10A fuse should be connected in series with the B+ feed. Is this correct? Is this a typo intended to say a 10A fuse on the KSI feed?

Sam ]]> Controllers gnikmas http://www.diyelectriccar.com/forums/showthread.php?t=37867 Controlling a shunt wound motor http://www.diyelectriccar.com/forums/showthread.php?t=37809&goto=newpost Sun, 25 Oct 2009 10:07:50 GMT Friend of mine is looking at doing an ev conversion. He has an 9" forklift pump motor and from what I can see its shunt wound. I'm just wondering whats is the best (if indeed any) control setup for such a motor. I'm a bit afraid to give it a run on my igbt based controller as I'm thinking it may have a weird characteristic. Any advice much appreciated. ]]> Controllers jackbauer http://www.diyelectriccar.com/forums/showthread.php?t=37809 PWM Controller Current ratings? http://www.diyelectriccar.com/forums/showthread.php?t=37772&goto=newpost Sat, 24 Oct 2009 01:40:42 GMT I must be missing something with respect to series or shunt wound DC motors, and controller current. For example let’s say we have a 48 volt... I must be missing something with respect to series or shunt wound DC motors, and controller current.

For example let’s say we have a 48 volt motor rated at 157 FLA or 7500 watts (10 HP). Control is via PWM controller. What stumps me is I am told to use a minimum 400 amp controller or larger. Why would I need any more than say 200 amps? LRA maybe to get low RPM torque? ]]> Controllers Sunking http://www.diyelectriccar.com/forums/showthread.php?t=37772 Electronic synchromesh shifting. http://www.diyelectriccar.com/forums/showthread.php?t=37764&goto=newpost Fri, 23 Oct 2009 20:31:44 GMT I came up with another nice feature on my AC motor controller. Shifting gears on my manual transmission takes about 4-6 seconds because I don't have a clutch. I have to wait for the motor to coast to the correct speed before engaging the next gear.

I now have a shift light which tells me when to shift. It works like this:

When I let off the throttle the motor RPM value is stored.

I shift the transmission into neutral

When the motor RPM is 66% of the stored RPM, my shift light will illuminate. This tells me the next gear is ready to engage.

My next upgrade will be to regeneratively brake the motor until the conditions are right to shift, then let the motor coast as I engage the next gear. ]]> Controllers etischer http://www.diyelectriccar.com/forums/showthread.php?t=37764 Nice controller feature to have http://www.diyelectriccar.com/forums/showthread.php?t=37752&goto=newpost Fri, 23 Oct 2009 15:23:19 GMT I added a 0-60 MPH timer to my controller. The timer gets reset to zero at 0 RPM. The timer starts timing once the motor begins to turn. Once... I added a 0-60 MPH timer to my controller.

The timer gets reset to zero at 0 RPM.
The timer starts timing once the motor begins to turn.
Once I hit 6800 RPM, the timer value is held.
When the motor RPM is zero, the timer resets.

I can look down at any time and see what my last 0-60 time was. It's all hands free, I never have to push any buttons!

]]> Controllers etischer http://www.diyelectriccar.com/forums/showthread.php?t=37752