Search found 2777 matches

by madin88
Jun 17 2019 9:59am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 89
Views: 2962

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

If your story is more than two years old, then you are being disingenuous by (deliberately) not mentioning that fact. It is exactly one year ago when i bought the modules in May-June 2018 if that helps you to decide if it is meaningful or not :wink: No wonder the discussion turned this route if som...
by madin88
Jun 17 2019 5:56am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 89
Views: 2962

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

Mosfets...again...early on...controllers came to Vadym complete from China. What the Chinese did or if they used legit mosfets is NOT knowable. Later on, that changed and controllers were purchased without mosfets and a couple other parts. Instead legit parts were purchased in the USA from known so...
by madin88
Jun 17 2019 3:42am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 59
Views: 3666

Re: Sur-Ron - Belt upgrade KIT

On my home-built moped i am using a similar belt drive and the large pulley is raw aluminum (without anodizing). I never heard such squeeking noise, only the high pitch whine you can hear in the first vid from Allex (bike inside a room with the wheel off the ground). But almost since the beginning i...
by madin88
Jun 17 2019 2:49am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 89
Views: 2962

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

Sorry Vadym...geez...haters... I stand by what I said: 1. Nothing goes out without being bench tested. 2. If the package was not crushed under a truck, there's a very HIGH chance all parts arrived 100% working. 3. There's a pretty good chance that mistakes were made by the end user that damaged the...
by madin88
Jun 14 2019 3:03am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 59
Views: 3666

Re: Sur-Ron - Belt upgrade KIT

I re-align the wheel/tension 10 times and driven 300+km Did you align the pulley by using a straight tube like it was mentioned? and not taking location of the wheel or marks on the swingarm into account? Did you check the thing with the axle nut and that it could move backwards on the left side du...
by madin88
Jun 14 2019 1:56am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14544

Re: APL's DIY axial-flux motor

I would cut it here (red line) simply because it is easier to do as cutting it L-shaped.
If you fill a drop of epoxy (liquid steel) into the gaps it should be plenty for stability in my opinion.
Stator Cut..jpg
Stator Cut..jpg (58.08 KiB) Viewed 231 times
by madin88
Jun 14 2019 1:46am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 59
Views: 3666

Re: Sur-Ron - Belt upgrade KIT

there is only one thing left that can be wrong...the offset from the pulleys is not good. It is highly unlikely that there is something wrong with offest, simply for the reason because the belt is touching the outside guide flanges on BOTH the small and large pulley. Dont like to set the compleet w...
by madin88
Jun 12 2019 10:24am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 59
Views: 3666

Re: Sur-Ron - Belt upgrade KIT

Thanks for taking pictures. I can see the belt also touches the outside guide flange on the front which would mean that there is no offset issue and so there must be a problem with the angle (left sketch on the picture which fechter posted) Shims are not needed. Enough if you just make a quarter tur...
by madin88
Jun 11 2019 4:18am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 89
Views: 2962

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

Most phones, even very old ones, can be used as dashboards. Android or iOS, doesn't matter. As it was pointed out here earlier, those phone can be had for next to nothing, so they can be used as permanent dashboards. I would like to have used such older phones with not that great resultion, but the...
by madin88
Jun 11 2019 3:27am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 59
Views: 3666

Re: Sur-Ron - Belt upgrade KIT

Put small amount natural grease to the outer side of the belt and the squeak is gone, so the problem in not in the teeth section of the belt but more on the side. The Hz i have now on the gates app is 80Hz 86Hz 90Hz 83Hz turnt the belt and measured in 4 places. Run the bike yesterday from a 100% ch...
by madin88
Jun 10 2019 12:47am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 59
Views: 3666

Re: Sur-Ron - Belt upgrade KIT

The first time i hear this noise was yesterday and i have this on video in the above post @ 1:20 there is the noise....now this noise is always there under a little load and higher speeds. It sounds a bit like if the belt would jump over under load. Do you feel anything if it appears or is it just ...
by madin88
Jun 09 2019 1:13pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 494
Views: 43109

Re: Nucular electronics - complete kit for ev! [beta]

I wouldn't say that surron motor is that good, it have quite low power factor. Since that it reaches battery voltage quickly and doesnt let you to use all avaible torque, it needs a lot of flux weakening to make it working good. Someone posted a dyno sheet about surron motor a while ago which i hav...
by madin88
Jun 07 2019 8:00am
Forum: General Discussion
Topic: EMI/RFI Dangerous?
Replies: 11
Views: 271

Re: EMI/RFI Dangerous?

EMF stands for either electromotive force or electromagnetic fields. Probably the latter based on usage. The strength of these is often given in units of electrical or magnetic field. Note that it is generally referring to _static_ fields, fields that either aren't moving or are moving so slowly th...
by madin88
Jun 06 2019 1:17pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14544

Re: APL's DIY axial-flux motor

Do you have an osci or do you know someone so that you can measure BEMF?
With more magnet separation do you mean the gaps between the magnets, thus magnet coverage?
by madin88
Jun 06 2019 12:13pm
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 89
Views: 2962

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

An LCD running canbus or whatever is lame by comparison. The app does way more than any dedicated LCD and does it at the resolution of your phone. I have other controllers and dashboard options and they are not as good. I always would prefer a dedicated, solid display with a solid mounting hardware...
by madin88
Jun 06 2019 11:29am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14544

Re: APL's DIY axial-flux motor

If you short without load you'll likely burn the motor in no time. It will be like 0-x kW of heat into the windings. An oven heater coil and a bucket of water would do the trick Yes of course you would have to do this in steps with cool down time between. Someting like: 5RPM -> measure current and ...
by madin88
Jun 06 2019 11:21am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14544

Re: APL's DIY axial-flux motor

I ordered a tachometer, and as soon as it gets here, I'll try to get a Kv. I tried to measure phase ohms, but my meter isn't up for it, I can't really get anything definitive. I was able to cut back the plastic insulator, center the stator, and give it another spin test, and noticed that it definit...
by madin88
Jun 06 2019 10:56am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14544

Re: APL's DIY axial-flux motor

Another fun test is to short the phase wires and then turn it to see how strong the resistance is. This would be also useful to find out saturation current. If we short all three phase wires and measure the current between them while the motor get spun to higher and higher RPM. Only problem is to f...
by madin88
May 26 2019 3:08am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 59
Views: 5209

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

8057 Which kV? Hopefully you get a motor with balanced bell and better bearings so you do not have to deal with same problems everyone else had in the past. And if you buy a long shaft be aware that they all will come with 13.8-13.9mm diameter instead of 14mm. If someone would ask me if i would rec...
by madin88
May 22 2019 7:17am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 494
Views: 43109

Re: Nucular electronics - complete kit for ev! [beta]

VasiliSk wrote:
May 22 2019 7:03am
There is no specific numbers, just some motors may run not so well
Ok thanks i already thoght that it would be hard to say a specific number as too many parameters are involved.
by madin88
May 22 2019 6:59am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 494
Views: 43109

Re: Nucular electronics - complete kit for ev! [beta]

I don't think these motors can be beaten for their size, weight and power in a super bike/emoto/lightweight motorcycle build, but the problem is getting them to run properly! Don't take the power ratings of those RC motors too seriously.. Most manufactures overates them by two or three times and if...
by madin88
May 15 2019 10:34am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3680
Views: 255545

Re: Sur-Ron - New Mid drive Bike

Even without spacers this pack has annoying limited size. You sit there and think in style of "if I only had 3mm more I could get additional 50 cells " What are the dimensions of the battery slot? Maybe it is possible to use a large aluminum tube as battery housing instead of the original one (wher...
by madin88
May 12 2019 9:26am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 129
Views: 16612

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

Where do you buy the magnets? I got screwed over when i bought magnets for my motor build, dimensions of the magnet were useless. Need to find a reliable seller. I buy them from here: Huatai Xinding (Beijing) Metal Materials Co., Ltd. Add:Dongmafang No.415, ShangZhuang Town, Haidian District, Beiji...
by madin88
May 05 2019 8:58am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 129
Views: 16612

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

Hey guys, over the winter i did a few things on another 8057 motor. The new motor is handwound and it is 20P (instead of 16P) for higher torque. I also was using stronger and segmented magnets to further improve things. The only concern i have is that it won't have the same sine-wave shape BEMF as t...
by madin88
May 05 2019 8:21am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 494
Views: 43109

Re: Nucular electronics - complete kit for ev! [beta]

Any news yet about the size of the BMS and it's connectors? Will it support single cell voltage monitoring in smaller configurable groups of four or something like that (i mean similar as Adaptto where you can set the number of cells per group from 2-4 and each group is insulated)? Because in case ...