Search found 14854 matches

by fechter
Apr 10 2021 11:06am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1462
Views: 129889

Re: APL's DIY axial-flux motor

Welcome! Nice looking stators. You have even more iterations than APL.

Now we need to figure out how to 3D print that SMC magnetic stuff.
by fechter
Apr 10 2021 11:01am
Forum: EBike Build Threads
Topic: A2B Metro (Gen 1) Restoration and Upgrade
Replies: 81
Views: 2971

Re: A2B Metro (Gen 1) Restoration and Upgrade

Yes, the A2B Excel was labelled/sold as an 'Electric Scooter' and appears to have been fitted with an 800W version of the UltraMotor. I guess the controller was in the frame: It says main battery 48v, so that's how they got more power. I ran mine at 52v for a year before I did the external controll...
by fechter
Apr 08 2021 10:19pm
Forum: EBike Build Threads
Topic: A2B Metro (Gen 1) Restoration and Upgrade
Replies: 81
Views: 2971

Re: A2B Metro (Gen 1) Restoration and Upgrade

Cool, I've never seen one like that. Around here it would be legal on the street, but not on the trails. You'd be sort of screwed with that one if you hit any kind of hills like I deal with. Great for flat ground.
by fechter
Apr 07 2021 9:45pm
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 2053
Views: 144745

Re: la Nina rears her ugly head

Still sitting at 10.5" for the season. The hills are looking about as green as they're going to get right now. It will be all brown pretty soon.
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by fechter
Apr 07 2021 11:17am
Forum: EScooters/EMotorcycles
Topic: Looking for featherweight geared hubmotors, >10kW
Replies: 35
Views: 1219

Re: Looking for featherweight hubmotors, >10kW

That sounds pretty close to a Sur-ron motor. Not a hub motor, but they have a good track record. I could not find specifications ....I send them an e-mail.....do you have the specifications?.... Check out this page: https://www.sur-ron.com/us/power.html Keep in mind the power rating of an electric ...
by fechter
Apr 05 2021 11:50pm
Forum: EScooters/EMotorcycles
Topic: Looking for featherweight geared hubmotors, >10kW
Replies: 35
Views: 1219

Re: Looking for featherweight hubmotors, >10kW

meddesign wrote:
Apr 05 2021 9:02pm
I am looking for 6000 rpm 15-20kw for a 32" prop....any suggestion on a DD hub motor? This is for a Ultra-Lite Power launch glider
That sounds pretty close to a Sur-ron motor. Not a hub motor, but they have a good track record.
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by fechter
Apr 05 2021 1:45pm
Forum: Motor Technology
Topic: Car alternator to PMAC?
Replies: 35
Views: 1041

Re: Car alternator to PMAC?

I was able to set my falling edge and rising edge on the zero crossing of my sensor signal. How do I find stator U to Rotor Sensor U by test. Unfortunately, this varies depending on what controller you are using. They are not consistent about the labeling. The only way I know is to trial-and-error ...
by fechter
Apr 05 2021 7:57am
Forum: General Discussion
Topic: Just had an earthquake in Los Angeles
Replies: 139
Views: 17271

Re: Just had an earthquake in Los Angeles

Bet that one woke up a lot of people.
by fechter
Apr 04 2021 6:30pm
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5427
Views: 619455

Re: Sur-Ron - New Mid drive Bike

150 ohms not 15. 1/2 w should be good.
by fechter
Apr 04 2021 11:51am
Forum: EBike Build Threads
Topic: A2B Metro (Gen 1) Restoration and Upgrade
Replies: 81
Views: 2971

Re: A2B Metro (Gen 1) Restoration and Upgrade

I replaced the freewheel on mine with a new one that was the same tooth count as the original. I really can't hear it much. You really want the pedals to work if you want to avoid issues with stupid cops. Also handy when the electric drive fails. On mine, I can assist the motor up to about 20mph in ...
by fechter
Apr 04 2021 11:41am
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5427
Views: 619455

Re: Sur-Ron - New Mid drive Bike

I have what look like the same signal lights. I had to place a load resistor across the amber input to ground to make the flasher work. I think I used 150 ohm resistors. It's pretty common to need load resistors when using LED lights with a flasher. My load resistors were installed in the rear signa...
by fechter
Mar 30 2021 11:53pm
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 2053
Views: 144745

Re: la Nina rears her ugly head

Forecast high tomorrow 84. Several cities nearby are expected to break records. There is a slight chance for rain after the weekend. The warm weather is nice except all the plants are flowering early and the pollen is really thick. Stuff that makes you dizzy. Fire season is already here in South Dak...
by fechter
Mar 30 2021 2:39pm
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5427
Views: 619455

Re: Sur-Ron - New Mid drive Bike

Oh one thing, the charger that I have doe's not have an on/off switch, as soon as you plug it in the power is on, will this make a difference to the steps you suggested? No, other than instead of turning "turning on main power", you simply plug in the charger. My charger doesn't have a sw...
by fechter
Mar 30 2021 8:12am
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5427
Views: 619455

Re: Sur-Ron - New Mid drive Bike

New member here; I have just a couple of questions, My Sur-Ron battery died ( will not power the bike & no readout on the screen). Try this before giving up: Awaking the Battery after Auto-Sleep mode: 1. Plug the charger into the Main power. Do not turn on the charger, then insert the charger i...
by fechter
Mar 30 2021 8:08am
Forum: EBike General Discussion
Topic: How To, 50A BBSHD Controller Mod
Replies: 275
Views: 58399

Re: How To, 50A BBSHD Controller Mod

30h is a communication failure. The display is unable to communicate with the controller. Hard to say what caused that, I would carefully check the connections between controller and display. Look for bent pins. 12h is a current sensor fault, indicating the current signal voltage coming from the shu...
by fechter
Mar 27 2021 12:30pm
Forum: Motor Technology
Topic: Car alternator to PMAC?
Replies: 35
Views: 1041

Re: Car alternator to PMAC?

Not good. Capacitors won't fix that problem. The flux it getting pulled to one side at high currents. Most motors have the hall sensors mounted at the end of the slot, not in the middle. Since the rotor teeth are skewed, this might be hard to make work also. You may need to use a separate encoder, e...
by fechter
Mar 26 2021 10:08am
Forum: EScooters/EMotorcycles
Topic: Sondors x new bike the Metacycle
Replies: 63
Views: 2103

Re: Sondors x new bike the Metacycle

They don't seem to understand electricity much.
The motor is capable of 20hp and 8kWh and a top speed of 80mph. The motor can be pushed further for a peak power of 14.5kWh.
I'm still waiting for someone (we trust) to actually test one before throwing it under the bus.
by fechter
Mar 25 2021 9:46pm
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 2053
Views: 144745

Re: la Nina rears her ugly head

I think the rainy season is done here. Nothing in the long range forecast other than near 80 temps and a lot of wind. Fire season will be back soon.
by fechter
Mar 24 2021 10:12pm
Forum: EBike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 159
Views: 41730

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

The throttle issue sounds like mine. Several members have reported good results by flashing new firmware to the controller to fix the problem. I can't vouch for compatibility of any firmware versions. My hardware hack will work regardless of firmware version. The PAS problem can be improved by chang...
by fechter
Mar 24 2021 8:59am
Forum: EBike General Discussion
Topic: How To, 50A BBSHD Controller Mod
Replies: 275
Views: 58399

Re: How To, 50A BBSHD Controller Mod

A zero reading for the shunt resistors is correct. The temp sensor is buried in the potting on the top side of the board near where the blue phase wire goes in. Seems unlikely you hit the wires for it since they're buried in the potting. I'd still look carefully around that area. The temp sensor wir...
by fechter
Mar 23 2021 10:26pm
Forum: Motor Technology
Topic: Car alternator to PMAC?
Replies: 35
Views: 1041

Re: Car alternator to PMAC?

I found a way to put about 25A trough one phase at a time. The rotor dosent really lock in a position, I can move it easy a little in each direction. And in that little movement one led on my tester turns on and off for each phase. So I guess that means the positions should be ok, but I think I sho...
by fechter
Mar 23 2021 10:22pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1462
Views: 129889

Re: APL's DIY axial-flux motor

It seems like the SMC is at least in the ballpark. It's going to be hard to prevent things from moving with that much force. A lever arm with one end on the scale will work and will reduce the travel by the ratio of the lever. Another approach is to let it stick with a 1mm non magnetic shim, then se...
by fechter
Mar 23 2021 8:16am
Forum: EBike General Discussion
Topic: How To, 50A BBSHD Controller Mod
Replies: 275
Views: 58399

Re: How To, 50A BBSHD Controller Mod

11h indicates temperature sensor failure. The temperature sensor is a little black bead on a pair of black wires that attach near the PAS sensor wires. I would pull it apart and look for that sensor and check the wires. Maybe you pinched or broke a wire. Other possibility is a tiny spot of solder la...
by fechter
Mar 22 2021 11:49pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1462
Views: 129889

Re: APL's DIY axial-flux motor

Good you can measure the current. Hopefully it stays steady enough to get a snapshot.
by fechter
Mar 22 2021 8:15am
Forum: EBike Troubleshooting
Topic: Error code 06 under voltage issue. Need help!
Replies: 7
Views: 211

Re: Error code 06 under voltage issue. Need help!

The strange voltage reading when the switch is off is pretty typical. The smallest stray leakage current is enough for your meter to read. The meter is very sensitive. If you place any kind of load (resistor, light bulb) across the battery when the switch is off, you should see zero.