Search found 517 matches

by minde28383
Dec 19 2019 9:19am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

different pitches, different lengths, see pic. more tooth does not mean less noise. Unless you install bigger front sprocket and motor rpm drops down, so yes, there will be less noise but mostly because lower rpm, but less mechanical advantage which is opposite what is aimed. Noise is created by cha...
by minde28383
Dec 19 2019 7:53am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

72T and 12T will give 6 ratio. 72T and 10T will give 7.2 ratio. If it is too sluggish from start, change it to 10T later on. It all depends on rear wheel diameter and tire selection and amps supply. Or in between with 65T and 10T - 6.5 ratio, but with 72T more freedom to change gearing later on. The...
by minde28383
Dec 16 2019 3:18pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

nucular 24fet (500A phase, 300A battery) is very enough, but up to 20s (90v). Maybe can be 21s, need to ask if is safe to go near top values on this controller, also it might depend if you use regen braking. Regarding splitting modules or not. If you can accommodate unsplitted modules into frame and...
by minde28383
Dec 16 2019 10:26am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

Everybody will have different opinions about it. It will be a weak if you want to pull wheelies at 100km/h. It will be strong to spin wheel in low speeds if geared correctly. The lighter the bike the better performance. Also take into account that it is not just motor which gives you good performanc...
by minde28383
Dec 04 2019 9:29am
Forum: E-Bike Reviews & Testing
Topic: Sabvoton SVMC072150 controller review, variable regen *PICS*
Replies: 341
Views: 66005

Re: Sabvoton SVMC072150 controller review, variable regen *PICS*

Volts wrote:
Dec 04 2019 7:29am
Does anyone know if the wrong programming setup makes the motor and controller run warm?
Yes, it might.
by minde28383
Nov 27 2019 1:43pm
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1279
Views: 243302

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

It's very good that you stated that cleary because I think I and probably others assumed that slower motor needed, less rpm are need, something like 4000rpm with field weakening when building bigger wheel ride. I totally believe with higher reduction you might win some more torque on rear axle. I th...
by minde28383
Nov 27 2019 11:57am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1279
Views: 243302

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

What rpm you aim for? What's wrong with current, max 6000rpm with field weakening.

Sent from my Mi 9T using Tapatalk

by minde28383
Nov 27 2019 10:12am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1279
Views: 243302

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

They don't do customisation if not plannet to do so. And they did not plan to do custom winding for the motor.
by minde28383
Nov 25 2019 3:38am
Forum: E-Bike Reviews & Testing
Topic: Sabvoton SVMC072150 controller review, variable regen *PICS*
Replies: 341
Views: 66005

Re: Sabvoton SVMC072150 controller review, variable regen *PICS*

Cant seem to make my controller run slower changing the DC currents and the phase currents, only works when changing the motor speed percentage but this makes the motor run hot, any input would be helpful I’m running a 96120 controller Run controller slower? How does it is even possible. What do yo...
by minde28383
Nov 20 2019 4:37pm
Forum: E-Bike Non-hub Motor Drives
Topic: higher or lower kv
Replies: 110
Views: 11352

Re: higher or lower kv

Speaking of 205 3kw hub in rear wheel. The reality is that lower kv pulls better of the line and following is simple example, explanation why people are saying so. People are having controllers like Sabvoton or Kelly or some Infineon etc. Controller is very important factor in how much thrust you wi...
by minde28383
Nov 15 2019 9:44am
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2124
Views: 302708

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)

12g does not mean precise digits. Well, it does, but better find out what you buy in mm. It does not mater what geage it is, 12,11,10 will do fine. The chepper it is the more crap you get. Maybe you rim spoke holes are too big for 12g spoke nipples? Find out your spoke nipple diameter and rim holes ...
by minde28383
Nov 14 2019 12:15pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

Current floods motor with more current when field weakening kicks; motor does not converts it to mechanical energy and more heat is happening. If temp is not monitored that something will burn. At least with cheap controllers it is. Just poor controller design.
by minde28383
Nov 14 2019 12:01am
Forum: E-Bike Build Threads / Photos & Video
Topic: Robs bike build
Replies: 46
Views: 8326

Re: Robs bike build

Do you still ride the bike with pit bike fork? How does it run so far? Good pit bike brakes?
by minde28383
Nov 12 2019 2:37pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

All stuff is related. Have you heard holistick. It's not that but similar.
Look at the topic. It holds so many things mentioned already so it's spoiled already.
by minde28383
Nov 12 2019 1:31pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

You are not clobbering anything. All places are good.
by minde28383
Nov 11 2019 9:55pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

Can use sabvoton even though qs does not recommend it for the motor. It will run but I don't know if field weakening will work as good as with votol.
Also I think sabvoton does not run sensroless.
by minde28383
Nov 10 2019 1:40pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

eee291, Can find out whom you are asking about speed. Anyways. If you are terrified by your bike than goal reached :) Lowering gearing you will lose thrust, instead just reduce amps till you get to safe zone. What's your top speed with current 5:1 gearing and what speed you aim for? If you terrified...
by minde28383
Nov 10 2019 11:54am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

This is what I had as reference: https://www.maedler.de/product/1643/1615/362/1656/2123/kettenradscheiben-krl-ohne-nabe-08-b-1 your example: 114 teeth, 9kg, 88 € (excl VAT) quite some figures, admittedly - but a feasible solution. Aluminum would be nice, sure, but I doubt that it will be cheaper. Y...
by minde28383
Nov 09 2019 11:53am
Forum: Items for Sale - New
Topic: qs 3kw 70H mid drive
Replies: 19
Views: 1807

Re: qs 3kw 70H mid drive

Still available.
by minde28383
Nov 09 2019 3:54am
Forum: E-Bike Reviews & Testing
Topic: Sabvoton SVMC072150 controller review, variable regen *PICS*
Replies: 341
Views: 66005

Re: Sabvoton SVMC072150 controller review, variable regen *PICS*

*Removed

Here you go:
Let me know once I can remove links
by minde28383
Nov 08 2019 5:22pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

I searched and found ISO 08 B-1 industrial standard sprockets in 95 teeth but weight is 5.4kg. Cast iron, most of its weight will be lathed off of course. http://www.kettentechnik.com/2011/09/12/simplex-sprockets-08b-1-din-8187/ (picture bellow) https://www.bearingsrus.co.uk/transmisson-products/spr...
by minde28383
Nov 08 2019 4:00pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 441
Views: 47766

Re: QS 3000w midmotor

Yes, it is unlikely to see some narrow motor any time soon. There lots of folks just give up and install long ones like D4500 and qs 3000w mid drive motors.
by minde28383
Oct 31 2019 9:14am
Forum: E-Bike Technical
Topic: New sabvoton user. regen wiring help please
Replies: 17
Views: 2322

Re: New sabvoton user. regen wiring help please

Yes, probably issue with some settings.
"QS motor has regen", well usually we say that controller has regen, not motor.
by minde28383
Oct 26 2019 10:14am
Forum: E-Bike Reviews & Testing
Topic: Sabvoton SVMC072150 controller review, variable regen *PICS*
Replies: 341
Views: 66005

Re: Sabvoton SVMC072150 controller review, variable regen *PICS*

there should be be no issues once get get usb driver and app installed.
It is a pc porn. Sound complicated and i know you not alone encountering such things.
Some just can't make app to get installed on pc no matter windows version.