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by voicecoils
May 25 2015 9:29am
Forum: E-Vehicles General Discussion
Topic: 120V receptacle Ground UP or DOWN ?? seem not very clear !
Replies: 37
Views: 5478

Re: 120V receptacle Ground UP or DOWN ?? seem not very clear

Always interesting to see how standards for common things vary around the world. s. yes, if my memory serve me well,..UK plugs/sockets are earth upwards. Oddly, considering how much of our history and technology is copied from the UK, but Aussie plugs are all earth pin downwards ? :?: Funny then th...
by voicecoils
May 25 2015 5:03am
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16538
Views: 1621035

Re: E-S Stealth Electric Bike Owners

Nice aftermarket front chainring option QMS! That's a good solution to shift the pedal-able high speed range. As for going to a smaller freewheel at the back, unless Stealth or Crystalyte produce a sidecover with M30x1 threads (BMX standard) it's unlikely you'll find a singlespeed freewheel under 16...
by voicecoils
May 21 2015 12:18am
Forum: General Discussion
Topic: What it like biking 2000+ miles?
Replies: 10
Views: 884

Re: What it like biking 2000+ miles?

I rode my ebike across Australia, 5500 km in about 35 days. I found the whole thing enjoyable and rarely felt boredom. I listened to 10 or 15 audiobooks during stretches where the landscape was monotonous. I also looked out for wildlife, listened to birds, admired the vegetation, took photos, snacke...
by voicecoils
May 13 2015 6:13am
Forum: Battery Technology
Topic: Anyone know about the COBOX Wattmeter - Power Analyzer?
Replies: 10
Views: 1429

Re: Anyone know about the COBOX Wattmeter - Power Analyzer?

I haven't used one but looks to be powered by an Arduino Mini: https://www.sparkfun.com/products/11113

Interesting voltage range of 55v max, that excludes 16S 48v iron phosphate which charges to 58.4v

Cobox says a new version is coming with bigger voltage and current windows. Good idea!
by voicecoils
May 03 2015 3:35am
Forum: E-Scooter and Motorcycle General Discussion
Topic: jonescg's NEW electric racebike BUILD thread!
Replies: 1259
Views: 191648

Re: jonescg's NEW electric racebike BUILD thread!

Nice. The love-child of self tappers and pop rivets, rivnuts are pretty rad.

Any progress in controller datalogging? Good luck in Adelaide!
by voicecoils
Apr 29 2015 3:08am
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16538
Views: 1621035

Re: E-S Stealth Electric Bike Owners

Rix wrote:Here is my latest vid.
Really enjoyed that clip too Rix. Love the 'warp speed' moments where the motor's whining and the scenery is racing past.
by voicecoils
Apr 28 2015 2:40am
Forum: EV Business World
Topic: Investing in Tesla General Discussion Thread
Replies: 90
Views: 15560

Re: I am about to pull the trigger on a 6 figure Tesla Stock

I am about to pull the trigger on a 6 figure Tesla Stock purchase, about 20 percent of our savings. There's lots to discuss about buying Tesla stock generally, but since you've framed your post in terms of spending a considerable chunk of your wealth on one stock it makes me wonder if the purchase ...
by voicecoils
Apr 27 2015 7:43pm
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 47359

Re: Micro Lebowski Controller - DIY 3kw

Well they sure do look similar to me. :roll: I got an 'old' mac with thick lams. And I will pay for the postage to you animalector. It's me who has the troubles and i appreciate your investigation. Yep, compared to other brands of brushless hubmotors MAC/BMC/EZEE are very similar, I just can't prom...
by voicecoils
Apr 26 2015 4:10am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 47359

Re: Micro Lebowski Controller - DIY 3kw

so, ezee and mac have same poles, coils, mags, lams etc? there's something screwey with the "electrical characteristics" so I wanted to keep it as close to a MAC as possible if they're the "same" sure, I'll pay the postage costs. That would be a great help, 20" RWD would be cool. let me know how mu...
by voicecoils
Apr 26 2015 3:46am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 47359

Re: Micro Lebowski Controller - DIY 3kw

Animalector wrote:I really need a MAC motor in a wheel to test it properly.. ( no other motor will do since it's specifically a mac that Izeman is having trouble with)
I can send you up an EZEE motor (either 26" FWD or 20" RWD) if needed. EZEE, MAC & BMC all share the same basic dimensions and magnet/stator layout.
by voicecoils
Apr 26 2015 1:13am
Forum: General Discussion
Topic: Considering titanium
Replies: 9
Views: 651

Re: Considering titanium

I knew you all would like this idea, I am returning my 700c kit and hope they will send me a 26. Titanium ebike, here I come! Cool. While the Ti frame's dropouts are probably pretty strong, I'd still suggest using high quality rear-specific torque arms on both sides. Like these: http://www.ebikes.c...
by voicecoils
Apr 26 2015 12:58am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Best front wheel for 100kg race bike.
Replies: 7
Views: 1052

Re: Best front wheel for 100kg race bike.

What sort of purpose/performance/power/handling are you shooting for? If you plan to race on tracks designed for motorcycles and cars I'd stick to wheel size, tyres & wheelbase from current Moto3 or the previous 125cc GP class. Those bikes weigh 70-85kg dry, have 40kW+ and hit ~230km/h. They may hav...
by voicecoils
Apr 25 2015 10:09pm
Forum: General Discussion
Topic: Considering titanium
Replies: 9
Views: 651

Re: Considering titanium

Good idea. I ride a Ti frame ebike and love it. Strong, light, doesn't rust, no paint to scratch.

Don't leave it sitting around unused, electrify it! :)
by voicecoils
Apr 25 2015 7:40am
Forum: Battery Technology
Topic: This is how A123 care about quality control
Replies: 262
Views: 22828

Re: This is how A123 care about quality control

amberwolf wrote:It's software is not running on a Windows computer? or an Apple (whcih at least used to have a similar utility)
On Apple's OSX the print screen program is called "Grab" and is in the Utilities subfolder of Applications.
by voicecoils
Apr 25 2015 7:19am
Forum: E-Bike General Discussion
Topic: MSDS needed for Turnigy and Zippy Lipo
Replies: 3
Views: 1250

Re: MSDS needed for Turnigy and Zippy Lipo

Here's an MSDS sheet for Lithium Cobalt batteries like Turnigy and Zippy:

http://www.batteryspace.com/prod-specs/ ... 202015.PDF

Also on page 6, handling requirements for transport by ocean are covered.
by voicecoils
Apr 24 2015 5:16am
Forum: E-Bike Technical
Topic: Avanti Electra axial flux hubmotor - just for fun
Replies: 12
Views: 2273

Re: Avanti Electra axial flux hubmotor - just for fun



First spin-up. Sorry for the vertical video and shaky Cycle Analyst. On the CA screen where it show's km/h it's giving RPM/10 (the speedo has been set to 1666mm wheel dimeter).
by voicecoils
Apr 24 2015 4:36am
Forum: E-Bike Technical
Topic: Avanti Electra axial flux hubmotor - just for fun
Replies: 12
Views: 2273

Re: Avanti Electra axial flux hubmotor - just for fun

Yeah it's 8 pole pairs :) Nice find, testing will be very interesting :mrgreen: Cool, thanks for the confirmation. I've had a little chance to play around with the motor with the ASI controller in sensorless mode. Interestingly, it does not want to start when the software is set to 8 poles. It judd...
by voicecoils
Apr 24 2015 12:26am
Forum: E-Bike Technical
Topic: Avanti Electra axial flux hubmotor - just for fun
Replies: 12
Views: 2273

Re: Avanti Electra axial flux hubmotor - just for fun

*Reserved* for initial findings
by voicecoils
Apr 24 2015 12:23am
Forum: E-Bike Technical
Topic: Avanti Electra axial flux hubmotor - just for fun
Replies: 12
Views: 2273

Avanti Electra axial flux hubmotor - just for fun

Back in 2010, Liveforphysics made a thread asking if anyone had one of the hubmotors made for the Avanti Electra. Here's the original thread: http://endless-sphere.com/forums/viewtopic.php?f=2&t=22255 Apparently about 1000 of them were made and sold around the year 2006. The actual motor development...
by voicecoils
Apr 18 2015 8:08pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1216
Views: 208935

Re: Compact Field Oriented Controller, ASI + Grin, limited r

How about starting a separate thread to discuss potting further?
by voicecoils
Apr 16 2015 7:52am
Forum: E-Bike Non-hub Motor Drives
Topic: Manta motors / ebay
Replies: 7
Views: 1856

Re: Manta motors / ebay

It can and has been done:
Image

However, many hubmotors and other mid drive motors can handle 36v40A. They may also be cheaper, lighter or more efficient.
by voicecoils
Apr 13 2015 2:07am
Forum: E-Bike General Discussion
Topic: Need a reliable electric bike for daily commute to work! $4K
Replies: 13
Views: 1427

Re: Need a reliable electric bike for daily commute to work!

A $4k budget comes close to allowing you to buy two electric bikes. In my experience the best way to insure you always have an ebike ready to ride (not broken or being serviced) is to have a backup ebike. It also provides a 2nd ebike to go on rides with friends, partner etc. If you just want one, yo...
by voicecoils
Apr 11 2015 5:04am
Forum: Battery Technology
Topic: I've built an Arduino battery cycle tester!
Replies: 27
Views: 4210

Re: Help me design a battery cycle tester!

This is nice, but you cant do constant current. Your current will drop of as the voltage drops of. I agree constant current is important for repeatable testing and particularly if you want to compare different cells against each other. There are some pretty cheap widgets out there that you plug a r...
by voicecoils
Apr 10 2015 5:05am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1216
Views: 208935

Re: Compact Field Oriented Controller, ASI + Grin, limited r

I prefer everything on the same end. OK, that seems pretty definitive from this small groups at least. Will proceed for now with all cables on one end then! +1 for cables all all on one end. Besides allowing for cleaner looking installs, it's handy to be able to orient the controller such that wate...
by voicecoils
Apr 07 2015 8:07am
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2100
Views: 274785

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tir

I would like to find some moto rims that suit 2 cross on big hubmotors without extra drilling. Strength+reliability should be at least as good if not better and 2 cross has a nice visual appeal to me. I haven't found a rim maker with good extrusions that can handle the larger angles. Either they sp...