cheap 24v/48v brushed controller rec

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Re: cheap 24v/48v brushed controller rec

Postby august23 » Wed Mar 21, 2012 9:52 pm

bgnome wrote:Thanks for the input guys.

I think this mod is going to sit on the back burner for a while. Keywinn has not gotten back to me in a few days, so I looked in the controller and found the 63V caps and 2 pairs of fets: one pair are IRF 3205s and the others say F1 H33, but I can't get any info on those. I have not been able to scrounge up much info on this particular controller (does not look like the old ananda), but I will keep looking.


another thing to consider when over volting a motor is the efficiency loss. most motors are rated by their peak efficiency.... and giving it more juice brings down the efficiency. the best hands on way to know if your loosing efficiency is if the motor is running hot or not. the loss of overall power outside that of forward motion is in the form of heat. the more heat, the less efficient it's running.
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Re: cheap 24v/48v brushed controller rec

Postby Dauntless » Thu Mar 22, 2012 3:07 am

I've patched up enough of those Curries in the last few years, this should be up my alley. It was mentioned they were confused on if this was a scooter or a bike, you didn't respond to that. I suddenly realized I've never seen the separate part for the controller on the bike, maybe it's inside the batterpack, I'm not sure. I went and looked mine with the conversion kit over, no sign of it. But since you have the controller in your hand I'll assume it is the scooter.

First of all, my best guess is you should just put the 36v Currie controller on it. Look how cheap, although darn, out of stock at the moment. https://www.curriestore.com/product/eZi ... oller/491/ It's for the 1,000 watt bike. There is even cheaper stuff at Scooterparts4less.com, etc, (Bring your own wiring diagram) but I'm holding what is probably the identical controller to yours in my hand and looking at the pic of the 36v Currie to see a match for every plug on this controller. (And then some.) However, look for a 5 or 6 pin throttle plug on yours, the 36v says it's a 5 pin. 6 would mean you need another throttle. But here it is WITH the throttle. http://www.monsterscooterparts.com/curr ... ottle.html

Just remember, they SAY they should work, but sometimes you find yourself having to rewire. http://electricscooterparts.com/hookup/ ... wiring.htm

Now, about those batteries. Are you SURE you don't have a pair of 12v, 10 amp batteries? That is what I expect to find in any 24v Currie system, haven't seen anything different yet. I think you're already getting all the voltage they can give at 24v. To go 36v, (As others mentioned, really as far as you want to go) you need one more cell, I recommend you replace all 3 at once because mismatched cells destroy each other quickly. You'll also need a new charger. http://www.monsterscooterparts.com/scsts1elscba.html

I ran 36v on the S350 with not much of a shunt mod (Extra wire soldered onto the arch you'll see if you open your controller) and I guess the way to put it is my inadequate little scooter became less inadequate. She's have to say for herself if she's happy with it that way. Of course I'm the kind of guy who rides these things after he puts meathooks on them and gets going 45mph downhill. I should do something about the brakes, etc. I should guess a bigger controller would accomplish more than a shunt mod, but only one way to find out. I thought the motor got pretty danged hot before, not sure it's worse now. But I don't really run it CONTINOUS when I ride, I get to speed, coast, etc. No suspension, not much brakes, I guess it's not good to put too much into upgrading this thing. Next time I have a 36v to fix I'll try the controller on it.
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Re: cheap 24v/48v brushed controller rec

Postby bgnome » Thu Mar 22, 2012 9:27 am

I apologize if it was not clear, but the wife is riding a circa 2007 Currie Ezip Trails, same model as seen here:
http://gokartsusa.com/eziptrailzelectricbicycle-2.aspx

This takes the rack-mount type batteries. The rack is a custom piece that houses the controller and wiring harness, as well as a DPDT switch to select which battery pack. I have used the conversion kits and thus have 2 fairly new SLA batery packs which are rated 24V 10AH each. I plan on rewiring the switch to operate parallel/series. She is likely only going to use it with 1 battery for her own recreational purposes due to weight, but I would like to make the upgrade so that I could use it for longer distance commuting, but I want to make sure that she can still use it the same way with minimal aesthetic changes.

I will take more pics of the controller when I attempt this mod in earnest. It is not the current potted controller that they sell in the conversion kits, although it is the same 5 wire throttle. I currently have it swapped in to my Terratrike Path with the Currie conversion on it and a 24V Ping, while she is running the modern controller. It is not potted at all, has 4 fets, and the brake cutoff. The sticker is mislabeled as brushless, as it definitely runs my DC brushed motor, which is wired in reverse.

It is not the Ananda described here:
viewtopic.php?f=2&t=831

Stock Wiring Diagram for Bike:
http://www.currietech.com/dealers/wiki/index.php?title=File:Wiring_Diagram_-_RMB_with_SLA_Batteries_Bikes_(2008_USA).png
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Re: cheap 24v/48v brushed controller rec

Postby august23 » Thu Mar 22, 2012 10:49 am

bgnome wrote:I apologize if it was not clear, but the wife is riding a circa 2007 Currie Ezip Trails, same model as seen here:
http://gokartsusa.com/eziptrailzelectricbicycle-2.aspx

This takes the rack-mount type batteries. The rack is a custom piece that houses the controller and wiring harness, as well as a DPDT switch to select which battery pack. I have used the conversion kits and thus have 2 fairly new SLA batery packs which are rated 24V 10AH each. I plan on rewiring the switch to operate parallel/series. She is likely only going to use it with 1 battery for her own recreational purposes due to weight, but I would like to make the upgrade so that I could use it for longer distance commuting, but I want to make sure that she can still use it the same way with minimal aesthetic changes.

I will take more pics of the controller when I attempt this mod in earnest. It is not the current potted controller that they sell in the conversion kits, although it is the same 5 wire throttle. I currently have it swapped in to my Terratrike Path with the Currie conversion on it and a 24V Ping, while she is running the modern controller. It is not potted at all, has 4 fets, and the brake cutoff. The sticker is mislabeled as brushless, as it definitely runs my DC brushed motor, which is wired in reverse.

It is not the Ananda described here:
viewtopic.php?f=2&t=831

Stock Wiring Diagram for Bike:
http://www.currietech.com/dealers/wiki/index.php?title=File:Wiring_Diagram_-_RMB_with_SLA_Batteries_Bikes_(2008_USA).png


is this your motor? https://www.curriestore.com/product/eZi ... Motor/459/
you better test this setup with WOT (wide open throttle) and no load before you get the 36v controller. watch and listen to the motor at high speeds. make sure the wheel doesn't follow suit with the motor when/if it decides to 'mis-fire'. . and like i said before, you have to be careful how you use the throttle at high speeds else the motor gets confused and tries to reverse or stop (creates very loud thumbing/banging noises every couple of seconds). I can't imaging what would happen if I didn't have a freewheel setup. direct drive could be sketchy when it skips a beat.

I guarantee you dont want to run it at 48v... it wont last 10 min. and like the previous guy said... no continuous usage at 36v.
In the land of currie, anything above 36v is nonexistent.... no xlr chargers, no fitted controllers. the basic rule of thumb with these motors is amps= torque and volts =speed. these motors can easily handle the extra voltage, just not the extra amps. which means, under heavy load conditions, hills, continuous over speeding, the motor heats up quickly. when I added one battery to my setup w/o upgrading the stock 24v/20a controller, I noticed a serious speed increase (from 16mpg to 24mph), and a noticeable torque increase on hills (I didn't test anything longer than one block uphill to be sure not to burn it out). Then, after a week, I got a new 36v 30a brushed controller.... no change in speed (still 24mph), and only a slight increase in torque... maybe 7-8%. Then I got a BMC brushless motor and 36v/45amp Lynn brushless controller... and now it simply halls ass. 29mph on flat and 20mph uphill.... after 20 min of continuous use... the motor is STILL COLD!!!

you can run the batteries in parallel, but I dont recommend charging them in parallel.



here is the cheapest contoller you'll find pre-wired for your setup.
45.50 w/shipping (he sells a 5 pin version too)
http://www.ebay.com/itm/NEW-36-Volt-Con ... 221wt_1166
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