Currie Kick Scooter conversion

Lightweight / Folding / Portable EVs - seats optional

Re: Currie Kick Scooter conversion

Postby ElectricGod » Wed Mar 01, 2017 11:02 am

E-ScooterDude wrote:My apologies EG, that side does appear to be the sprocket side. We were still needing those other dimensions however.

Not having the hubs is a pain when you are trying to order the sprockets.


If you get my exact hubs, then it won't be problem. Just have him make what I did. It will fit. I wonder how he made that sprocket and kart adapter for me without that dimension.
My kick scooter project
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Used laptop battery builds that work
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E-Bike XB-502 (Moped) conversion project
viewtopic.php?f=10&t=83302&p=1222730#p1222730

Currie kick scooter conversion project
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Re: Currie Kick Scooter conversion

Postby E-ScooterDude » Wed Mar 01, 2017 2:17 pm

Thanks again EG. Apparently it's doable but difficult, that's why he's asking for the BCD and bore. I guess the machine is easier to setup with those numbers rather than working out the BCD from the bolt to bolt data.

I'm having him send what he has as I am confident that we are all on the same page and I can use what he's made for you.

I appreciate your help EG. Michael of LightningRods has been excellent to work with. Most of my parts are in now and I have the Big Block and sprocket coming. My little BOMA is working a bit too hard on my hills.
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Re: Currie Kick Scooter conversion

Postby ElectricGod » Wed Mar 01, 2017 10:19 pm

E-ScooterDude wrote:Thanks again EG. Apparently it's doable but difficult, that's why he's asking for the BCD and bore. I guess the machine is easier to setup with those numbers rather than working out the BCD from the bolt to bolt data.

I'm having him send what he has as I am confident that we are all on the same page and I can use what he's made for you.

I appreciate your help EG. Michael of LightningRods has been excellent to work with. Most of my parts are in now and I have the Big Block and sprocket coming. My little BOMA is working a bit too hard on my hills.


What he made for me was a perfect fit. He sent me a PDF with the hole pattern. I printed it and then sat it on top of the hub. It matched up perfectly so I told him to make it. He may have forgotten about that file. It's been a good while.
Last edited by ElectricGod on Wed Mar 01, 2017 10:23 pm, edited 1 time in total. View post history.
My kick scooter project
viewtopic.php?f=35&t=75177

Used laptop battery builds that work
viewtopic.php?f=14&t=76013

E-Bike XB-502 (Moped) conversion project
viewtopic.php?f=10&t=83302&p=1222730#p1222730

Currie kick scooter conversion project
viewtopic.php?f=35&t=83830&p=1227407#p1227407
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Re: Currie Kick Scooter conversion

Postby ElectricGod » Fri Mar 24, 2017 10:31 pm

More work done...

First off solid props to shortcircuit911 for modding these front forks and making the steering tube a bit longer for me. The original front forks had no shocks and are too narrow for a disk brake and had no good way to mount a caliper to them These forks had everything except the down tube was about an inch too short so he lengthened it for me.

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I was concerned that the shaft to bell union was not going to hold and sure enough, two little set screws on two flats on the shaft were not enough. I suppose if the motor was turning lots of RPM's and then geared down a good bit, then they would have been enough, but my motor is direct to the back wheel so it will see a good bit of torque on the shaft. I had already cut the original shaft off too short to add anything to it, so I bought more shaft and cut it a bit longer. The new shaft is much harder than the original one. Cutting it on my band saw took 20 minutes. I could not drill it with HSS bits at all. Fortunately I have carbide end mills that cut the hardened steel easily enough. This is the end of the prop adapter that came with the motor. It uses 4 screws to bolt to the top of the bell. I drilled 4 holes through it for set screws. One set of holes are threaded straight through so a single set screw goes right through the shaft. The other two set screws just sit on flats on the shaft. The bell also has two set screws in it that sit on flats on the shaft. That ought to do the job.

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I have 3 20S LIPO packs that I pulled from the blue scooter a while back. They had several bad cells in them. I finally got around to taking the packs apart and discarded the bad cells. I then made another 12S pack that went in the Currie. The two packs have their own individual BMS. The green pack is 10,000mah and the rebuilt pack is 8000mah.

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The Grinfineon controller is a perfect fit under the back deck. It currently has IRF4110 mosfets in it. I'll replace them with AOT290's once they arrive. They will increase the controllers wattage by another 50% and have much less Rds so the controller will not only run at higher wattage, but run cooler too. This isn't the final controller for the scooter. I have a Power Velocity controller coming that will get AOT290's as well. It's will be added later. Obviously I need to bind up the phase and power wires a bit, but that's a couple of zip ties. Under the motor are two IP68 connectors. One is the throttle and controller enable signals and the other is for the rear lights. Power to the controller is two 10 awg wires with 5.5mm bullets.

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Last edited by ElectricGod on Fri Mar 24, 2017 10:38 pm, edited 1 time in total. View post history.
My kick scooter project
viewtopic.php?f=35&t=75177

Used laptop battery builds that work
viewtopic.php?f=14&t=76013

E-Bike XB-502 (Moped) conversion project
viewtopic.php?f=10&t=83302&p=1222730#p1222730

Currie kick scooter conversion project
viewtopic.php?f=35&t=83830&p=1227407#p1227407
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Re: Currie Kick Scooter conversion

Postby ElectricGod » Sat Mar 25, 2017 8:11 pm

My Power Velocity 12 fet controller arrived today. It's 1/2" shorter than the Grintech. I'll swap out the power and phase wires for 10 or 12 awg silicon. I read on another thread that people are putting IRF3077 mosfets in this controller and supposedly getting 4200 watts out of it. I'm seriously skeptical of those numbers on the IRF3077 since they are 370 watt fets. I'm going to use the AOT290. They are on order and are rated for 500 watts so getting 4000 watts in a 12 fet controller will be doable. Can't wait! The IRF3077 has a bit less Rds 2.8 micro ohms compared to the AOT290 at 3.5 micro ohms, but the IRF3077 is nearly 2X slower than the AOT290. The 3077 at 10 volts can handle more current 210 amps compared to 140 amps, but running them at 48 to 80 volts and that current difference wont matter anymore while the wattage will. At 370 watts and 82 volts, the IRF3077 can handle 4.5 amps. The AOT290 at 500 watts and 82 volts can handle 6.1 amps. I'm going to smoke the IRF3077 and keep pulling power on the AOT290. 4000 watts in a 6" long controller...damn!

Image
Last edited by ElectricGod on Sat Mar 25, 2017 8:23 pm, edited 1 time in total. View post history.
My kick scooter project
viewtopic.php?f=35&t=75177

Used laptop battery builds that work
viewtopic.php?f=14&t=76013

E-Bike XB-502 (Moped) conversion project
viewtopic.php?f=10&t=83302&p=1222730#p1222730

Currie kick scooter conversion project
viewtopic.php?f=35&t=83830&p=1227407#p1227407
User avatar
ElectricGod
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