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Old 02-02-2013, 12:26 AM   #5991 (permalink)
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Quote:
Originally Posted by Vtecsauce View Post
MPaulHolmes:

Here is a print screen of the throttle response with only 12v attached to the controller.

...

It's a little tough to tell what's going on in this chart, but there definitely some things that don't look right.

first, you have t-pos-gain and t-pwm-gain both set to 120. i'm guessing you're just playing around with values because this doesn't make sense. I'd suggest going back to the defaults of 8 and 0. Here's a little blurb on what those settings mean:

Open ReVolt/Controllersetting - EcoModder

next, this might be minor and adam can probably comment more on this, but i think the rtd-explorer software requires an rtd period of 200.

then, you probably shouldn't be setting up motor over speed sensing if things aren't operating correctly. you should set the threshold and the motor calc amps back to zero.


now, just for knowledge's sake, the 'current feedback' parameter is the actual current the controller is measuring. it appears from the chart that this value is near zero, so i'd agree something is weird. the 'current reference' parameter is the actual current value that is being commanded to the controller. if you read the link above, you'll see how the current reference parameter is calculated from the throttle position value.


lastly, if you actually do measure 500A output, perhaps with a clamp meter or you know the controller is working correctly and rtd explorer shows this or something, this is actually the max output of the controller. if you want more power, you'll need a larger controller that outputs more current or a different motor that can produce more torque with 500A output.

hope that helps!

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Old 02-04-2013, 05:11 PM   #5992 (permalink)
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Question : Could the 500A control board be used with a hass 600-s current sensor and a software mod to work up to 1000A ?
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
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Old 02-04-2013, 05:35 PM   #5993 (permalink)
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yes, It can.. Paul built three 1000A beta units this way. I own one, but never came to test it :-(
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Old 02-04-2013, 05:36 PM   #5994 (permalink)
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But not with a hass 600 btw..
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Old 02-05-2013, 03:03 AM   #5995 (permalink)
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The datasheet says the hass 600 can go up to 900 amps, but I find that hard to believe. How could the lem 300 and the lem 600 have the same maximum? You would only need to change a single line of code. Hmm... Maybe you wouldn't have to change anything. Let's see... the maximum current you would see with a LEM 600 would be 600*5/3 = 1000. shut up... You wouldn't have to make any code changes!! But I'm not sure the LEM 600 can really go to 1000. But if the lem 300 can go to 500amp, the lem 600 should go to 1000. That's what I think. If you have a load tester, it wouldn't be bad to verify this. haha. But my money's on it being OK.
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Old 02-05-2013, 09:24 AM   #5996 (permalink)
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RTD Explorer used a period of 100. 10 times per second update. It is set properly in that picture.

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Old 02-05-2013, 03:43 PM   #5997 (permalink)
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Thanks guys. I'll build the controller , connect up the dummy load and put the hammer down!
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
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Old 02-07-2013, 07:49 PM   #5998 (permalink)
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I got a free golf cart! Well, the brother-in-law of my neighbors gave me the golf cart, and it didn't belong to him. So, now I probably have to pay for it. haha. It had been sitting in their backyard for a few years. It was completely toasted. Really old. Maybe 30 years. I've got everything ripped out, and a 12v battery inside, with a contactor so I can drive around on/off. Actually, my son is going to drive it around tonight, but I first have to go get some bolts for the albright/curtis contactor. He's only 5. Is that legal? haha. But I'll be in the passenger seat with the on-off switch. The contactor also has an emergency disconnect button.

I have an old prototype controller power section, so I'm going to do a control board, and put that in the golf cart. it's going to be fun! Most golf carts aren't "throttle proportional to current".

I'm getting solar panels in a little over a month with my retirement money from working at the college. Soon I'll be driving around and cooling our house with sunlight. Isn't it funny that the sun can make things colder?
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Old 02-07-2013, 10:18 PM   #5999 (permalink)
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Cool ! and I just had to make message 6000....
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Old 02-10-2013, 01:51 AM   #6000 (permalink)
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My son took the golf cart down the dirt road about 1/4 mile to check the mail (with me in passenger seat). We only almost ran into the fence & a telephone pole 1 time. I have it rigged to a little on/off switch. Soon we'll be at 72v with torque control. Then my wife can take it on the highway to work when she subs. (just kidding)

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