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  1. B

    Kelly Controller has no torque, jerks motor

    I couldn't figure out how to set the 48v LVC on the controller included with my cheap ebike kit to 36v, so I decided to get a used Kelly KBS48101L-L Controller instead, which I snagged from an eBay listing: https://www.ebay.com/itm/183888487486 I successfully connected this Kelly controller to...
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    Most efficient end-to-end pedal generator?

    I'm trying to power a PC from a bike pedal generator, and have some parts at my disposal, but I wanted to figure out the most efficient setup possible. The PC uses a "Pico power supply", so it is powered from 12 volts DC. It consumes between 40-160 watts depending on if I am gaming with the GPU...
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    How should I design this EV battery system?

    I currently have 14 Tesla 24v battery modules (75kwh total) and I'm going to wire them in series for 312v nominal for an EV. There's two ways I want to charge the battery pack: 1) From any standard J1772 public charge station (PlugShare, etc.) at a minimum of 6.6kw charge rate 2) This is a...
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    Would this pinion with rim-rack drive idea work?

    I was thinking of ways to use a high-RPM RC motor on an ebike, and I had an idea to attach the motor to the fork, similar to the way you would attach a dynamo. Instead of engaging with the tire like a dynamo or a friction-drive motor would, instead I would attach a steel pinion to the head of...
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    Need help designing a multipurpose low-speed camper platform

    I've been working on a project where I was going to add motorcycle-grade in-hub motors to a ~2000lbs camper-trailer, so that it can help push itself while my small EV car (Smart Electric) pulls it. I'm realizing that the better idea might be to just skip the car and hub motors, and create a...
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    Got a free AC motor, it is strong enough for EV conversion?

    Hey guys, I've been into EV's ever since I got my electric bike working about a year ago, thanks in no small part to all of you. Since then I've been dreaming of an electric car conversion. Now, seemingly out of nowhere, my boss asked me to toss out an old motor in the basement of our building...
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    Blowing 20 Amp fuses on a 500w Direct Drive Hub

    I just finished my new E-Bike; I'm using a 36v, 10amp rated (20amp peak) 10AH LiFePo4 battery with a 20 amp fuse, a 500 watt Direct Drive hub, and a controller of indeterminate wattage. The setup works great and takes me to 20-25mph without pedaling; the only problem is if I floor the throttle...
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    Need fast/cheap motor for 36v 10a LIFEPO4

    So, a while back I bought a 36v, 10a continuous, 10AH LIFEPO4 pack, and a 500w Heinzmann Geared hub motor. The Heinzmann put out a tremendous amount of torque, but the max speed was maybe 10mph. Whatever it was, I could get off and run faster. So, I've still got this battery pack and I'd like...
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    My ebike is built! Now how do I get more speed...

    I just completed building my own e-bike; I used a Mongoose Threshold for the frame, Kenda Kross Slick Tires, a Heinzmann 36v 500w rear hub, and a 36v 10ah LiFePo4 battery. I'm also using a $10 500w brushed controller I got on Ebay and a Hall Effect throttle. Now, I weight 180 and the bike...
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    What's the cheapest way to run a Heinzmann 400w 24/36v hub?

    So I grabbed a Heinzmann 400w 24/36v motor hub of Ebay and it should be getting to me tomorrow. I'm a pretty epic cheapskate and was wondering what would be the cheapest way to run this thing over several years. I've got a 36v 10ah LiFePo4 battery back on the way, but apparently the BMS is...
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    LiFePo4 Scam or Deal?

    Hi guys, I just purchased one of these on a split decision, since I had a 10% off sporting good Ebay coupon that was expiring soon: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250428217355 Now, I have a 24-36 volt, 400w Heinzmann hub wheel coming in the mail soon, and I was...
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