Search found 2437 matches

by ElectricGod
Apr 25 2019 11:20am
Forum: Motor Technology
Topic: BESC - beefed up VESC motor controller for high power ebikes
Replies: 81
Views: 3993

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

I charge to 4.35V/cell if I think it's questionable if I've got enough energy to make the ride, or at the racetrack where every extra watt of output is precious. For a normal ride, I charge to 4.05V/cell. I would still want a controller that supports charging to 4.35V/cell though. I guess you are u...
by ElectricGod
Apr 24 2019 7:31pm
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 12
Views: 512

Re: Hubmonster teardown

No that's nothing like a MiniMonster...way too many clots and polls, which means it will overheat if you try to go fast. This motor uses a lot of the same features as the hubmonster. It has that sheet of fiber glass under the windings. It has curved magnets wit the same dull metal coating on them. ...
by ElectricGod
Apr 24 2019 3:55pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

More work done...last night The motor is in place and the chain line is perfect. I'm not sure why, but even before trying delta and that giant 117T sprocket, the scooter was noisier than it is now. You hear a small amount of chain noise and motor sound and that's it. This is significantly quieter th...
by ElectricGod
Apr 24 2019 2:56pm
Forum: E-Bike Technical
Topic: Automatic Wheelie control / Launch control module Beta testing
Replies: 14
Views: 494

Re: Automatic Wheelie control / Launch control module Beta testing

My scooters wheelie when I take off.
I have a very simple solution...lean forward. No hardware required.
by ElectricGod
Apr 24 2019 3:47am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 12
Views: 512

Re: Hubmonster teardown

liveforphysics wrote:
Apr 23 2019 1:59pm
Looks like a really well designed hubmotor! Im impressed!
If you hunt around, you'll eventually come across an old scooter with one. That's how I got both of mine. Or you can just buy one from John in CR. However you get one, it's a compelling hub motor.
by ElectricGod
Apr 24 2019 3:43am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 12
Views: 512

Re: Hubmonster teardown

60mm is the most powerful and fastest with a Kv of just over 18. The lesser version are wound slower (so higher resistance) to offset the lowering of Kv to offset the narrower stator. No need to open...measure phase-to-phase resistance and Kv to know what you have. While 3 jaw pullers make getting ...
by ElectricGod
Apr 23 2019 1:25pm
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 12
Views: 512

Re: Hubmonster teardown

The only valid reason to pull the stator on one is to do cooling mods on the shell. The important stuff inside was all shared previously. How wide was the stator?...probably the largest if that's for the R Martin, but there were actually 3 different widths offered, and it's impossible to tell by th...
by ElectricGod
Apr 22 2019 8:19pm
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 12
Views: 512

Re: Hubmonster teardown

Cool stuff, I have never paid attention to no mopeds, except the one that works at the gas station, and one last year but TBH I just looked and twisted my throttle onward. The hubmonster looks to be a great motor for high power applications, has a distinct shape to it. E-mopeds arent really a thing...
by ElectricGod
Apr 22 2019 6:24pm
Forum: Motor Technology
Topic: BESC - beefed up VESC motor controller for high power ebikes
Replies: 81
Views: 3993

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

AKA good components hold up to over watting and abuse better than cheap parts. There are still some "gotchas" behind this. Yes reputable semiconductor companies often derate their devices to ensure reliability over full temp range or other environment conditions. Yes you may be able to exceed Vmax ...
by ElectricGod
Apr 22 2019 5:43pm
Forum: Motor Technology
Topic: BESC - beefed up VESC motor controller for high power ebikes
Replies: 81
Views: 3993

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

Fully charged 20S lithium is 84V. So 16V margin. You have to understand that difference between saying 15V and 18V is insignificant for this case. For example one motor could produce 10V spikes and a different one 20V spikes at same phase current. It's really hard to know how much is enough but 2V ...
by ElectricGod
Apr 22 2019 5:14pm
Forum: Motor Technology
Topic: BESC - beefed up VESC motor controller for high power ebikes
Replies: 81
Views: 3993

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

Mosfets are Vds rated for absolute maximum. If you exceed Vds voltage of a mosfet it will break almost instantly most likely with audiovisual effects. :mrgreen: Capacitors are rated for operating voltage. They usually survive up to twice that voltage but operating them over their rated voltage redu...
by ElectricGod
Apr 21 2019 4:01am
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Revolt RV-120-regular

I made a new shaft for the RV-120-regular today. The top has 4 flats for landing the set screws that are in the bell reinforcing disk. Just below that are 2 key ways that that mate to the key ways in the bell top. The bottom of the shaft has a key way and 3 flats that are all about 1.5" long for the...
by ElectricGod
Apr 21 2019 3:38am
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

Well photobucket is being a bitch again os doing anything there is impossible...no uploading no acess to existing images...nada. I'm ready to dump them. There services are spotty and unreliable at best and paying for service doesn't make that better. The bracket mounting is similar to how I did it f...
by ElectricGod
Apr 20 2019 4:16pm
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Revolt RV-120-regular motor bracket

The motor bracket is done, but it will get modded some to fit on the XB-502 scooter so this is pre-modding to make it fit. The last thing to do was use countersunk screws. https://oi1055.photobucket.com/albums/s515/rkenders/EV%20Stuff/Brushless%20motors/Revolt%20RV-120-Regular/RV-120%20motor%20brack...
by ElectricGod
Apr 17 2019 2:17am
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Revolt RV-100E shaft modding

The motor shaft is done. This long keyway will allow the sprocket to be positioned on the shaft anywhere in the 1.5" of keyway. https://oi1055.photobucket.com/albums/s515/rkenders/EV%20Stuff/Brushless%20motors/Revolt%20RV-100E/Revolt%20RV-100E%20shaft%20end%201.jpg There's 3 flats and the keyway and...
by ElectricGod
Apr 16 2019 3:23pm
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Re: Revolt RV-series motor review and comparisons

Look like you have worked very very hard on these motors EG. You should build your own motor from scratch! Are you going to test the RV100s on an EV to do a practical comparison? It didn't occur to me until you said that, but there's no reason why I couldn't put the RV-100E on the XB-502 and try it...
by ElectricGod
Apr 16 2019 11:00am
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Revolt RV-100E shaft to bell reinforcing

I got close to finishing up the new shaft for the RV-100E last night. The factory shaft was too short to rework and still have sufficient length out the bottom of the motor for a sprocket. I added nearly 1" of length to the new shaft. This is the new shaft to bell keyway and key. Due to a little slo...
by ElectricGod
Apr 14 2019 11:16pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

The motor bracket it essentially done for the RV-120. I need to make a few small additions to it for mounting to the swing arm, but it's really close to getting mounted! I still need to make a new shaft for the motor. A few pics of the progress today. It's all assembled with 8-32 screws which are a ...
by ElectricGod
Apr 14 2019 11:12pm
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Revolt RV-120-regular

The motor bracket it essentially done. I need to make a few small additions to it for mounting to the swing arm yet, but it's really close to getting mounted! I still need to make a new shaft for the motor. A few pics of the progress today. It's all assembled with 8-32 screws which are a good size i...
by ElectricGod
Apr 12 2019 11:47am
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

I have had my Lebowski contoller hooked up to a Nissan Leaf motor and haven't tested the scooter on the road but hope to in the next week or so and will report back. But yes you are quite right I will not see a 91% increase in top speed once the motor is loaded on the road. The important thing abou...
by ElectricGod
Apr 11 2019 5:48pm
Forum: Motor Technology
Topic: BESC - beefed up VESC motor controller for high power ebikes
Replies: 81
Views: 3993

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

It's IRF135B203. I think 15V margin is too low for such high currents. Fella from another forum has issues with 18S/300A and 100V mosfets. F611DY226K100ZLH0J https://www.farnell.com/datasheets/2373766.pdf A bit expensive but they have very low inductance (6 nH). The IRF135B203 is a 135v mosfet so 1...
by ElectricGod
Apr 10 2019 12:59pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

If your only problem is top speed, can't you find a way to do flux weakening? I don't know what controller you're using, so maybe it's not possible on yours, but I think that's the only way you could have both torque and top speed without having to use a mechanical gearbox. Flux weakening to be ver...
by ElectricGod
Apr 09 2019 1:18am
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

Flux weakening to be very effective needs lots of exposed iron on the armature. An IPM inrunner is best for FW. Otherwise FW has a small effect. The controller can do FW, but it's not on since it provides a small increase in motor RPM. FW increases phase current and reduces motor efficiency. Ah yes...
by ElectricGod
Apr 08 2019 10:46pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

If your only problem is top speed, can't you find a way to do flux weakening? I don't know what controller you're using, so maybe it's not possible on yours, but I think that's the only way you could have both torque and top speed without having to use a mechanical gearbox. Flux weakening to be ver...
by ElectricGod
Apr 08 2019 11:57am
Forum: E-Scooter and Motorcycle General Discussion
Topic: E-Bike XB-502 conversion project
Replies: 255
Views: 29188

Re: E-Bike XB-502 conversion project

As usual...get it all running and then decide to mod it again. This scooter ahs never spent more than a few days working before I decide to spend hours and hours on some upgrade or change for it. I think once it has the RV-120-regular in it, that then I'll be ready to call it done. I've pulled off t...