Search found 148 matches

by stan.distortion
Jul 21 2020 4:28pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1176
Views: 105535

Re: APL's DIY axial-flux motor

Fibreglass... for something quick and dirty could you pot one side, maybe a paper ring around the inside and outside diameters and another around each coil so they can still be removed and pour in resin? Not nice but it should add a lot of stiffness. Was wondering if webs could be run between the co...
by stan.distortion
Jul 21 2020 2:32am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1176
Views: 105535

Re: APL's DIY axial-flux motor

Can you post a cross section diagram of the centre piece and core carrier? It looks like you could get a couple of dished reinforcing plates in there to limit the flex, might be tricky with all the connections but maybe easier than making a whole new carrier. Sorry to hear it's having issues, I'd ha...
by stan.distortion
Jun 15 2020 5:38am
Forum: General Discussion
Topic: Bitcoins
Replies: 284
Views: 48679

Re: Bitcoins

That's making profit, not money creation. Once upon a time money was backed by precious metal, if a country added to its gold reserves it could create more money but those days are long gone. Here's how it works today, a bank approves a loan and enters the amount into their accounts. Boom, they just...
by stan.distortion
Jun 14 2020 9:29am
Forum: General Discussion
Topic: Bitcoins
Replies: 284
Views: 48679

Re: Bitcoins

Like markz said, it doesn't make sense. Or, to look at it another way, it only makes sense to a fool. The whole currency market requires a suspension of belief in reality. You're supposed to trust complete strangers with the value of your funds? Sure, the stock market works in a similar way, but th...
by stan.distortion
May 24 2020 4:58am
Forum: General Discussion
Topic: Bitcoins
Replies: 284
Views: 48679

Re: Bitcoins

I hear bitcoin is very popular in Venezuela so I think it is more like entity's forcing people on to their monetary system and cryptocurrency's popularity is a function of distrust in those governments. Trust in fiat currency is just big brother telling you what to believe when you think about it. ...
by stan.distortion
Apr 25 2020 7:28am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1176
Views: 105535

Re: APL's DIY axial-flux motor

Looking really good! Congrats :)
by stan.distortion
Apr 25 2020 7:28am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Honda z50j, first EV build
Replies: 11
Views: 583

Re: Honda z50j, first EV build

You're familiar with the Denzel units? Bolt in replacement for the Honda unit and seems to give pretty good performance. A build thread from someone using one here:
viewtopic.php?f=12&t=99606
by stan.distortion
Apr 25 2020 7:20am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Denzel 72v 4-spd Gearbox Build 125cc Dual Sport
Replies: 94
Views: 10947

Re: Denzel 72v 4-spd Gearbox Build 125cc Dual Sport

It might work well if you could figure out a way to shift electronically. Something like a big solenoid or RC motor attached to the shifter and a button on the handlebars. Add an arduino and you could even do full automatic gearchange going that route :twisted: A linkage salvaged from a sportsbike ...
by stan.distortion
Apr 17 2020 4:55am
Forum: Motor Technology
Topic: BESC - beefed up VESC motor controller for high power ebikes
Replies: 148
Views: 27093

Re: BESC - beefed up VESC motor controller for high power ebikes

Hi, great project! I'm really impressed in general with the amount of development work by the community that has gone into the VESC Project, without expectation of a return on investment - very refreshing :-) I am developing a high efficiency & high torque density motor for lightweight electric car...
by stan.distortion
Apr 12 2020 4:49am
Forum: Motor Technology
Topic: DIY IPM rotor?
Replies: 3
Views: 297

Re: DIY IPM rotor?

Total pain for a DIYer to machine and balance the rotor. Not impossible though, way more work than surface mount but the rpm range gains from field weakening would make it worth while.
by stan.distortion
Mar 31 2020 4:46am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1176
Views: 105535

Re: APL's DIY axial-flux motor

Yeah, toothed stators are usually used on stepper motors along with a toothed rotor to gain stall (holding) torque, usually at the cost of rpm.
by stan.distortion
Mar 27 2020 9:17am
Forum: E-Scooter and Motorcycle General Discussion
Topic: New conversion project for Piaggio Zip 50
Replies: 16
Views: 1923

Re: New conversion project for Piaggio Zip 50

Have you checked the swinging arm kits from QS? It looks like you'd need a lot of engineered parts to mount the 138 70H on your existing swinging arm. http://www.cnqsmotor.com/en/article_read/QSMOTOR%203000W%205000W%20138%2070H%20electric%20motorbike%20mid%20drive%20motor%20for%20electric%20motorcyc...
by stan.distortion
Mar 19 2020 5:58am
Forum: E-Vehicles General Discussion
Topic: Regen controller for E-Start on ICE
Replies: 5
Views: 713

Re: Regen controller for E-Start on ICE

A starter from a similar model would be by far the simplest option, even if none are available a flywheel to match the crankshaft taper with the gear/sprocket and sprag clutch should be possible as manufacturers tend to use the same taper across the range. Failing that it's possible to use the flywh...
by stan.distortion
Mar 15 2020 7:17am
Forum: General Discussion
Topic: Bitcoins
Replies: 284
Views: 48679

Re: Bitcoins

The Crypto coins have massively dropped over the last few days, ironically they are touted as the safe haven, but traditional gold has done far better only dropping single digit %, while major cryptos lost around 50% over the last week. I am not really a crypto coin enthusiast, the only thing I am ...
by stan.distortion
Mar 12 2020 6:29am
Forum: E-Bike Build Threads / Photos & Video
Topic: Death Trike (Its Vintage!)
Replies: 11
Views: 1678

Re: Death Trike (Its Vintage!)

goatman wrote:
Feb 21 2020 11:00pm
a person gets hammered, builds a 3000watt death trike with no brakes. makes one post, then???
never to be heard from again.
Send that man more beer! ;)
by stan.distortion
Mar 10 2020 3:52pm
Forum: General Discussion
Topic: Need help with 80v Greenworks/Kobalt/Stiga chainsaw speed controller
Replies: 16
Views: 1141

Re: Need help with 80v Greenworks/Kobalt/Stiga chainsaw speed controller

Thanks for the pic, I was hoping it was an electric pump but it looks like most (all?) electric saws are still using mechanical pumps :/ The one I'm planning to use is a ULKA NME, usually found in expresso machines but also used for oil in some applications, voltages might be an issue though. If you...
by stan.distortion
Mar 10 2020 11:06am
Forum: General Discussion
Topic: Need help with 80v Greenworks/Kobalt/Stiga chainsaw speed controller
Replies: 16
Views: 1141

Re: Need help with 80v Greenworks/Kobalt/Stiga chainsaw speed controller

Sorry if it's a bit off topic but could you post a pic of the oil pump on that saw? I'm building a saw from the ground up at the mo and have a pump on order that will work but it's quite a big lump, with driver circuitry it will take up about the same space as the motor! Thanks. EDIT: My best guess ...
by stan.distortion
Mar 09 2020 8:52am
Forum: Motor Technology
Topic: Hunstable HET Electric turbine
Replies: 10
Views: 853

Re: Hunstable HET Electric turbine

No, or rather, yes but only the less important bits. Like nearly all motors that one is steel cored and that's the hard part, you could print many of the parts but the cores would still need to be specially cut and that costs $$$. You could use the same kind of arrangement with air core that could b...
by stan.distortion
Mar 04 2020 6:42am
Forum: General Discussion
Topic: Electric Racing Chainsaw Build, Help Please
Replies: 129
Views: 5829

Re: Electric Racing Chainsaw Build, Help Please

There are a couple more on hobbyking that are worth a look for a saw: https://hobbyking.com/en_us/1-5th-brushless-motor-780kv.html?queryID=475e0f217853f100b8239d4284fa5746&objectID=45264&indexName=hbk_live_magento_en_us_products_hbk_price_stock_7_group_0_desc https://hobbyking.com/en_us/turnigy-aqua...
by stan.distortion
Mar 03 2020 10:09am
Forum: General Discussion
Topic: Electric Racing Chainsaw Build, Help Please
Replies: 129
Views: 5829

Re: Electric Racing Chainsaw Build, Help Please

Incremental prototypes would be a great way to get a feel for the technology and which direction to head in. Some 12S lipo packs, a big ~5kW RC motor and a sensorless controller on a smaller saw would be an easy way to dip a toe. Yep, and for pretty much a throwaway budget compared to the costs of ...
by stan.distortion
Mar 03 2020 8:27am
Forum: General Discussion
Topic: Electric Racing Chainsaw Build, Help Please
Replies: 129
Views: 5829

Re: Electric Racing Chainsaw Build, Help Please

+1 to vesc, really nice to work with and the new version 7 should be ideal, light, dependable and should just work for many motors that are notoriously difficult to run with other controllers. Your tuner will never go back to infernal combustion after seeing the logging and monitoring capabilities :...
by stan.distortion
Mar 02 2020 4:55pm
Forum: General Discussion
Topic: Electric Racing Chainsaw Build, Help Please
Replies: 129
Views: 5829

Re: Electric Racing Chainsaw Build, Help Please

By the sounds of things power wont be much of a problem and considering the sponsors you'll probably have a far better chance of the organisers looking favourably on an AC setup than DC (the stinky, thirsty but cheap 2-strokes of the electric world). From experience I'd suggest again to start small ...
by stan.distortion
Mar 02 2020 12:10pm
Forum: General Discussion
Topic: Electric Racing Chainsaw Build, Help Please
Replies: 129
Views: 5829

Re: Electric Racing Chainsaw Build, Help Please

You definitely can't go with DC and no controller (just a switch), because the clip I watched had one of the contestants get on the throttle too quickly and snapped the chain before even getting the saw to the log. If there would be a way use a switch only and have the rpm go from 0 to 100% smoothl...
by stan.distortion
Mar 02 2020 9:39am
Forum: General Discussion
Topic: Electric Racing Chainsaw Build, Help Please
Replies: 129
Views: 5829

Re: Electric Racing Chainsaw Build, Help Please

Yeah, I'd done quite of working-out for air core designs, nothing like as much as the researchers in that article put into minimising iron cores but enough for it to be obvious there's plenty of scope for improving power to weight ratios. I know I keep harping on about DC but the truth is I've littl...
by stan.distortion
Mar 02 2020 8:23am
Forum: Motor Technology
Topic: Lebowski controller IC 2.B0 source code and (short) explanation
Replies: 36
Views: 2545

Re: Lebowski controller IC 2.A1 source code and (short) explanation

I can't even begin to appreciate the work that must have gone into all that, thanks! :bigthumb: