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by Voltron
Aug 10 2020 2:55pm
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 325

Re: downsides to a higher voltage

It probably is close to a wash. Ultra high efficiency is great and all, but most basic controller and motors are pretty efficient to start with these days. It also seems like with how much power is packed into a modern battery, efficiency for range extension isn't as big a factor any more. 52v has b...
by Voltron
Aug 09 2020 9:09pm
Forum: E-Vehicles General Discussion
Topic: Delta trikes vs tadpole trikes
Replies: 18
Views: 339

Re: Delta trikes vs tadpole trikes

Would a Mod please LOCK this thread. Another thing I've noticed about trikes is there's something about the seat... It tends to get some people's heiney hairs wound up real tight... Def something to look out for. Re delta trike, yes there are some specialty, inch off the ground, more stable at spee...
by Voltron
Aug 09 2020 3:40pm
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 325

Re: downsides to a higher voltage

Going up into the hundreds of volts, there start to be some downsides, like dying etc. The risk of an ebike killing you starts much lower than that - at about 60 volts. I was somewhat kidding with the hundreds number, and if it happened just right, yes, you're correct that 60v could get you, but it...
by Voltron
Aug 09 2020 3:33pm
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 325

Re: downsides to a higher voltage

I would say the voltage is more about maximizing the efficiency of the components in the controller. I'm no expert, but have read there's efficiency plateaus with the fets and capacitors, but there's so many considerations, including things like trading off a little efficiency during use to get redu...
by Voltron
Aug 08 2020 11:58pm
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 325

Re: downsides to a higher voltage

As a very general thing, the 52v will make less waste heat. I didn't look up your motor, but assuming it's brushless, with brushed you get a lot more sparking and heat at the brushes, so that could change the equation. I'm running what was originally a 36v on 72v (20s) fyi. Going up into the hundred...
by Voltron
Aug 07 2020 9:03pm
Forum: E-Vehicles General Discussion
Topic: Delta trikes vs tadpole trikes
Replies: 18
Views: 339

Re: Delta trikes vs tadpole trikes

Either could be ok, mostly depending on his target speed range.. If he's ok always being under 12mph or so, delta would work. Regular periods of higher speeds tadpole would be better probably. Also, if he's actually planning on pedaling most deltas have weird turning characteristics as only one back...
by Voltron
Aug 07 2020 8:46pm
Forum: E-Bike General Discussion
Topic: How much power is too much power? (hub motor)
Replies: 42
Views: 839

Re: How much power is too much power? (hub motor)

It's a requirement in some places... Other places are lower like Europe, or require special equipment for legal higher speed like left side mirror and rear plate holder, others are a patchwork like the USA, in my state (CA) it's 28mph, and in big chunks of the world there's no limit, because they ha...
by Voltron
Aug 07 2020 2:50pm
Forum: E-Bike General Discussion
Topic: How much power is too much power? (hub motor)
Replies: 42
Views: 839

Re: How much power is too much power? (hub motor)

What makes you think he's trying to pass anything off as anything else? And I also have a heavy, single speed with direct drive motor, and I can still pedal it as fast as most friends on bikes I run into are pedaling... I've even had them remark on how good it seems to pull away from red lights comp...
by Voltron
Aug 07 2020 2:04pm
Forum: E-Bike General Discussion
Topic: How much power is too much power? (hub motor)
Replies: 42
Views: 839

Re: How much power is too much power? (hub motor)

I'll never get why people need it to be one or the other.... Instead of a beautiful blend of human power when desired but also higher speed than a human could ever achieve unaided, all in a quiet, neighbor friendly, zero emission package.

That's the best looking Schwinn cruiser I've ever seen btw 👍
by Voltron
Aug 06 2020 2:51pm
Forum: E-Bike General Discussion
Topic: How much power is too much power? (hub motor)
Replies: 42
Views: 839

Re: How much power is too much power? (hub motor)

Just for some perspective on basic 30/low 40s (mph) feels on what normally seems like not too bumpy city streets...the vid doesn't really capture how blinding squinting thru ones suddenly watering eyes can be. One thing about the Townie, it has the foot forward setup, which makes it really hard to l...
by Voltron
Aug 06 2020 2:26pm
Forum: E-Bike General Discussion
Topic: How much power is too much power? (hub motor)
Replies: 42
Views: 839

Re: How much power is too much power? (hub motor)

Basic Townie dropouts so we're all on the same page... Electra Townie 7 rear dropout.jpg Electra Townie 7 rear cassette.jpg Should be easy to mount torque arms, as the dropout isn't too sculpted out. Just fyi, usually you have to file out the dropouts to get a hub motor axle in far enough being a di...
by Voltron
Jul 24 2020 10:38pm
Forum: E-Vehicles General Discussion
Topic: Hub motor (true) amperage rating... where???
Replies: 9
Views: 325

Re: Hub motor (true) amperage rating... where???

That might not true anymore, at least in the EU. I think they have a standardized test that involves how long it takes the motor to heat up under a load on a dyno.
by Voltron
Jul 24 2020 2:14pm
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 294

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

Just remember it's not a brushed motor (I think). So it could still have shorted windings even with resistance, as the meter isn't measuring the windings directly. There could be a lot of stuff keeping it from running going on in there. With brushed you could put power straight to the leads without ...
by Voltron
Jul 24 2020 1:39pm
Forum: E-Vehicles General Discussion
Topic: Hub motor (true) amperage rating... where???
Replies: 9
Views: 325

Re: Hub motor (true) amperage rating... where???

That will probably depend on your driving style then. Doing isolated bursts of high acceleration followed by long steady medium high speed flat road sessions where the back emf and air cooling are both high the 30mm would probably be fine. Repeated high acceleration combined with hills, like drag ra...
by Voltron
Jul 24 2020 1:30pm
Forum: E-Bike Technical
Topic: Splicing an 8 conductor motor wire: how to make an elegant slender splice?
Replies: 7
Views: 219

Re: Splicing an 8 conductor motor wire: how to make an elegant slender splice?

They make high performance heat shrink also, I use it on boat wiring. High temp glue lined, 3 to 1 shrink ratio. 51Ou2mga04L.jpg Thanks for pointing that stuff out, since I didn't know it existed. That's a must buy for me, and will actually save me time and money with less double shrinking and no n...
by Voltron
Jul 24 2020 11:48am
Forum: E-Bike Technical
Topic: Splicing an 8 conductor motor wire: how to make an elegant slender splice?
Replies: 7
Views: 219

Re: Splicing an 8 conductor motor wire: how to make an elegant slender splice?

It's pretty satisfying watching the glue getting squeezed out the ends during heating. Works good for two smaller wires joining a single bigger wire, you can make a little space between the small ones and squish the heatshink while it's cooling and it gets a pretty good seal. Helps to start the heat...
by Voltron
Jul 24 2020 11:20am
Forum: E-Bike Technical
Topic: Splicing an 8 conductor motor wire: how to make an elegant slender splice?
Replies: 7
Views: 219

Re: Splicing an 8 conductor motor wire: how to make an elegant slender splice?

They make high performance heat shrink also, I use it on boat wiring. High temp glue lined, 3 to 1 shrink ratio.
51Ou2mga04L.jpg
51Ou2mga04L.jpg (48.35 KiB) Viewed 152 times
by Voltron
Jul 24 2020 11:11am
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 294

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

Also, the controller is in the hub, the smaller plug runs the throttle and display, and the decaying voltage is the capacitors in the controller discharging. So to fix it, you'll prob need either a replacement controller, or hack it to run an external aftermarket controller.
by Voltron
Jul 24 2020 11:06am
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 294

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

You have to unlace it from the spokes, then separate the two halves of the case. Its press fit together, and its easy to snap a piece of the spoke flange off during trying to yank it apart with a large gear puller or whatever you end up trying.
by Voltron
Jul 23 2020 5:17pm
Forum: E-Vehicles General Discussion
Topic: Hub motor (true) amperage rating... where???
Replies: 9
Views: 325

Re: Hub motor (true) amperage rating... where???

There's a possibility that they will run at different rpms. The 35mmv says 60v, which is nowhere close to the actual voltage limit. But when they list a voltage, sometimes it means the voltage that the motor will turn the right rpms for street legal speed at the rated voltage. Othertimes, it's a com...
by Voltron
Jul 23 2020 5:02pm
Forum: E-Vehicles General Discussion
Topic: Hub motor (true) amperage rating... where???
Replies: 9
Views: 325

Re: Hub motor (true) amperage rating... where???

You'll rarely regret going with the 35mm, unless minimal weight is one of the design goals.
by Voltron
Jul 19 2020 6:31pm
Forum: E-Bike Technical
Topic: Phaserunner on 3KW motor
Replies: 13
Views: 737

Re: Phaserunner on 3KW motor

Also, I'm usually going so fast and looking out for traffic for displays to matter much either... Seat of the pants feel during punching it becomes pretty accurate once you're calibrated 😉 And if you ride at full power all the time, pas settings and words in a display for different power settings is...
by Voltron
Jul 19 2020 6:10pm
Forum: E-Bike Technical
Topic: Phaserunner on 3KW motor
Replies: 13
Views: 737

Re: Phaserunner on 3KW motor

My Anderson's started slowly warping the plastic housings and getting worse contact, and started going into an overheating spiral that eventually left me stranded, luckily uphill of where I started. After that I got more into separating the phase wires, and way less wrapping to encourage air cooling...
by Voltron
Jul 18 2020 2:42pm
Forum: E-Bike Non-hub Motor Drives
Topic: RevX bike
Replies: 70
Views: 6278

Re: RevX bike

I think these were the first two images I saw at random without hearing about it before... Stunners, esp that silver one. The black and teal with the red shock is pretty groovy too.
9304e107780b998d2d105f0867c0d707.jpg
9304e107780b998d2d105f0867c0d707.jpg (156.64 KiB) Viewed 249 times
mrazek_revx.jpg
mrazek_revx.jpg (346.83 KiB) Viewed 249 times
by Voltron
Jul 18 2020 2:33pm
Forum: E-Bike Technical
Topic: Phaserunner on 3KW motor
Replies: 13
Views: 737

Re: Phaserunner on 3KW motor

What a great update, and great advice for people about necessary upgrades and safety gear when ramping up the power. 👍