Search found 1129 matches

by E-HP
Feb 22 2020 11:49am
Forum: E-Bike Technical
Topic: HeatSink that works well for smaller hub motors....
Replies: 12
Views: 174

Re: HeatSink that works well for smaller hub motors....

Add an internal temp sensor to get the temp of the stator to check the before and after temps. The problem with a geared motor is that it doesn't transfer heat well from the stator to the case, so cooling the case doesn't help the motor much. If you fill the motor with oil so that the heat transfers...
by E-HP
Feb 21 2020 9:35pm
Forum: E-Bike Technical
Topic: Bafang brake cut-off 3 wires to 2 controller wires
Replies: 8
Views: 121

Re: Bafang brake cut-off 3 wires to 2 controller wires

Oh so nobody thinks this will work now, as previous threads suggested it would bit that's from a few years back? If it's a hall based switch as Voltron describes, then it's not going to work. I assumed it was a reed switch, which often support NC and NO, and has three connections (and what you may ...
by E-HP
Feb 21 2020 7:43pm
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

Great info! Just a couple questions: 1) Is the main advantage of getting a phaserunner controller that it's smaller in size and has technology to make the motor quieter? 2) Does the 1500W motor you mentioned above (LeafBike) come available without the controller? I see the "kit" without battery is ...
by E-HP
Feb 21 2020 11:47am
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

Since you have a decent budget, I’d get the leaf bike 1500w motor since it has a good reputation and is very efficient. Any direct drive motor will be dead silent with an FOC/sine wave controller like the phaserunner. Motors will handle just about any voltage, but it’s a matter of how long. If you h...
by E-HP
Feb 21 2020 9:43am
Forum: E-Bike Technical
Topic: Bafang brake cut-off 3 wires to 2 controller wires
Replies: 8
Views: 121

Re: Bafang brake cut-off 3 wires to 2 controller wires

Use you ohm meter to check pair combinations to find the two that are normally open when the brakes aren't actuated, and closed when the brake lever is actuated. Those would be the pair to use with most two wire brake connections with the controller.
by E-HP
Feb 20 2020 8:25pm
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

Another question: do these hub motors typically come with built-in controllers? That would be nice so I'd have less wiring and less components mounted to the bike frame. Most folks wouldn't recommend a hub with a built in controller, since both the motor and controller produce heat, which isn't eas...
by E-HP
Feb 20 2020 4:57pm
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

Yep Facebook. I'll be able to secure the bike indoors and charge the battery for the ride home. You'll likely see other forum member ebikes there. I recall at least 2 or 3 threads last year of new members, building bikes to get there from other parts of the bay area, with some pretty long and chall...
by E-HP
Feb 20 2020 12:51pm
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

cbr shadow wrote:
It seems like there are a lot of people on the forum in my area so I'll post a link to the route, but it's from Fremont, CA to Menlo Park, CA and goes over the Dumbarton Bridge.
Facebook?



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by E-HP
Feb 20 2020 9:48am
Forum: E-Bike Technical
Topic: Hub motor help
Replies: 4
Views: 111

Re: Hub motor help

Scottywa wrote:
Feb 20 2020 8:27am
Please help. I have 2 hub motors both doing same isue. When i apply the trottle you hear the motor do something but takes a second to go. Once it starts to go the power comes in faintly then second later comes in full power
Are you using a sensorless controller?
by E-HP
Feb 19 2020 10:47pm
Forum: E-Bike General Discussion
Topic: singlespeed rear hub motor for 120mm spacing?
Replies: 47
Views: 3756

Re: singlespeed rear hub motor for 120mm spacing?

zeccato wrote:
Feb 19 2020 1:13pm

Field oriented control: with the right controller it can increase the speed, for example up to 120% and more.
You may be referring to flux/field weakening. You don't need a controller with FOC to have flux weakening. A lot of non FOC controllers have that feature.
by E-HP
Feb 19 2020 8:42pm
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

Let me know if you guys think this is a good idea: - Full suspension OR hardtail mountain bike (used from Craigslist) - I'd like to add 'drop bars' to this bike eventually. I know this complicates things to make a 'frankenbike' but I like the idea - I'd also like to add smoother tires for better ef...
by E-HP
Feb 19 2020 11:31am
Forum: E-Bike Technical
Topic: Couldn't get motor to run at no-load current
Replies: 5
Views: 146

Re: Couldn't get motor to run at no-load current

Did you also get it to run smoothly backwards? If that worked with low current, then use that combo and swap two of the big phase wires.


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by E-HP
Feb 19 2020 11:25am
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

When I first started riding my ebike, I learned two things right away. First was how fun they are to ride. The second, on my second ride, is that I never want to fix a flat while on a ride. Something to consider if you’re just starting out and selecting a bike. Range anxiety for me is never about th...
by E-HP
Feb 19 2020 9:52am
Forum: E-Bike Technical
Topic: Switchable voltage divider instead of throttle.
Replies: 11
Views: 333

Re: Switchable voltage divider instead of throttle.

So a single button, so that if you're in the middle power setting and want to go lower, you have to cycle through the higher throttle settings to get to the lower setting? Or are you thinking of an up and down button?
by E-HP
Feb 18 2020 10:33pm
Forum: E-Bike General Discussion
Topic: Recommend bike to bike communication method
Replies: 5
Views: 121

Re: Recommend bike to bike communication method

The answer seems to be: 1 Get VOX earpiece/boom mikes for the existing Motorola FRS radios. 2 Get earbuds, probably have them somewhere, for wife's iPhone and use my iPhone with my hearing aids. Microphone is in iPhones, carry them in shirt pockets. Just use our unlimited talk plan. Tried this toda...
by E-HP
Feb 18 2020 8:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: Little bike, big motor
Replies: 2
Views: 170

Little bike, big motor

I saw one of these little bikes parked on the sidewalk during lunch. Pretty small, 20 inch wheels I think. Per their website, seems pretty hefty on weight though (170 lbs?). What struck me was the size of the motor compared to the size of the bike. Looked like 5-6 inches in diameter (and 5.5 kw). Th...
by E-HP
Feb 18 2020 4:19pm
Forum: E-Bike General Discussion
Topic: Recommend bike to bike communication method
Replies: 5
Views: 121

Re: Recommend bike to bike communication method

How about the bluetooth to bluetooth headsets? Some are good for a half mile.
by E-HP
Feb 18 2020 4:13pm
Forum: E-Bike Technical
Topic: Diy battery. CASE on/off switch, how to connect?
Replies: 10
Views: 265

Re: Diy battery. CASE on/off switch, how to connect?

May not be doable. That switch isn't designed to handle the full battery output, so unless you wire up some sort of relay or choose another BMS, you may be out of luck.
by E-HP
Feb 18 2020 4:05pm
Forum: E-Bike General Discussion
Topic: Best Value fast ebike for my commute?
Replies: 34
Views: 691

Re: Best Value fast ebike for my commute?

I'm looking for advice on either a store-bought ebike, or else a kit that I can add to an existing bike (bike to be purchased used, likely) for my commute. My commute is 14.5 miles with only 200' of climbing. I'm a pretty avid cyclist so a non-electric bike works fine, but I thought there's opportu...
by E-HP
Feb 17 2020 7:00pm
Forum: E-Bike Technical
Topic: Diy battery. CASE on/off switch, how to connect?
Replies: 10
Views: 265

Re: Diy battery. CASE on/off switch, how to connect?

Are you using a BMS with an ON/OFF connection?
by E-HP
Feb 17 2020 2:09pm
Forum: E-Bike Technical
Topic: Diy battery. CASE on/off switch, how to connect?
Replies: 10
Views: 265

Re: Diy battery. CASE on/off switch, how to connect?

TatePL wrote:
Feb 17 2020 1:09pm

In the attached picture you can see the red switch Im talking about.
Welcome to the forum!

Perhaps this would be helpful: http://endless-sphere.com/forums/viewto ... eb8c358a95
by E-HP
Feb 17 2020 1:32pm
Forum: E-Bike General Discussion
Topic: Advice for a kit for a specific route
Replies: 15
Views: 401

Re: Advice for a kit for a specific route

Well after a good bit of looking and taking into account your advice I've had to look at the lesser favoured options, mainly due to finances. These are what I've come up with. Would you mind casting your eyes over my choices, I was really wanting a geared rear hub motor but can I hell fin any in th...
by E-HP
Feb 15 2020 1:15pm
Forum: E-Bike General Discussion
Topic: Advice for a kit for a specific route
Replies: 15
Views: 401

Re: Advice for a kit for a specific route

Still less than 500 feet of vertical in one mile. Not saying that's not a hell of a hill, but its going to be easily slayed by most motor kits over 500 watts. Agreed. Add statorade and you can to twice the distance. My cheap ebay 1000W DD hub is up to it. This is one hill by my house. The first mil...