QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China

[LeonardoJanus]

I hope one day Quanshun will make Pancake motors.

Also, dear Vito, make a brain storming with your engineers and look at:

https://en.wikipedia.org/wiki/Electropermanent_magnet

Implement this design in hub motors, mean fast pulse for high torque even at low RPM.
Mean less energy x mileage, mean less heat to dissipate.
Mean less magnets and less weight.

 

[ridethelightning]

Hi Vito. I have an issue with a cromotor that just wont run smoothly like the others I have.
I am using a sinewave controller.
The halls and phases are all functioning normally it would seem, but efficiency is lower and there is an odd reverberation when accelerating, like the feeling of a wheel out of true, but it disappears when when i let go the throttle.
also the motor just doesnt sound as smooth as it should.

In your experiences with testing, do you know of something that will likely cause these symptoms?
could it be badly installed hall sensors or perhaps a bad join on the phase wire(s) where it joins the windings?

Any clues much appreciated.

RTL

 

[Teh Stork]

Most likely contender is faulty wiring between controller and motor. Check and recheck phase wires and hall-signal wires. And if you don't find any fault, check again.

What sinewave controller do you run? Since you mention hall-sensors I guess it's nothing fancy that will throw a fit if something is wrong.

 

[ridethelightning]

thanks T.S.

good hint re phases/halls.

i have had bad solder joints cause problems on many occasions, but the results were usually more drastic, preventing the motor from running.

the controller is an adaptto sinewave controller.

perhaps its time to check again that all the connections are good.

 

[Merlin]

For QS v3 interessted guys....

took a 32km ride (most flat) with a buddy on 2 Raptors.

Same Controller, Same Wheels(19"), Same Setup.(70A Flux-150A Battery)

(QSv2)Cromotor v3 9kv vs (QSv3)Cromotor v4 11kv

No need to tell the 11KV accelerates up to 85kph with full 10-11KW.
the 9KV only up to 70kph.

After that Ride the v3 had 95° Motortemp, the v4 only 45°
Iam not sure if both had the temp sensor on the same spot, but beside that, the v3 makes "grumbling starting sounds" (as you can hear on most cromotor videos.)
the v4 is absolutley silent from a dead stop. (Both with Sine wave Sabvoton Controller)

everybody who wants to go with sinewave, think about losing about 7-8% TopSpeed or about 1KV.
So if you go with the 9,1KV you get only ~8KV with sinewave Controllers.

https://endless-sphere.com/forums/viewtopic.php?p=981766#p981003

 

[macribs]

everybody who wants to go with sinewave, think about losing about 7-8% TopSpeed or about 1KV.
So if you go with the 9,1KV you get only ~8KV with sinewave Controllers.

A FOC/ovs controller like adaptto would combat hi speed losses, yes?

 

[Merlin]

not under same conditions.

voltage - sinewave (w/o flux) = 80 kph
voltage - squarewave = 85 kph

voltage - sinewave (w 17% flux) = 85kph
voltage - sinewave (w 50% flux) = 100kph


thats only to show what i mean. only "near reality" values.


but if the question is: buy a controller without the option of flux weakining?..... never ever

Adappto, Sabvoton, Golden Motor had Sinewave + Flux.

Kellys new Series are Sinewave, but no Flux option.(shame on you Kelly )

 

[madin88]

For QS v3 interessted guys....

took a 32km ride (most flat) with a buddy on 2 Raptors.

Same Controller, Same Wheels(19"), Same Setup.(70A Flux-150A Battery)

(QSv2)Cromotor v3 9kv vs (QSv3)Cromotor v4 11kv

No need to tell the 11KV accelerates up to 85kph with full 10-11KW.
the 9KV only up to 70kph.

After that Ride the v3 had 95° Motortemp, the v4 only 45°

that was to be expected. for a meaningful comparison you need to adjust battery volts and amps on one setup so that both motors have same unloaded speed and power - especially if you have field weakening maxed out.
was the bike with V3 cro accelerating faster from a dead stop?

 

[LeonardoJanus]

Hello Vito

Another interesting concept is at:

http://visforvoltage.org/forum/13629-concepts-ebike-propulsion?page=8

Adding a ferromagnetic anular poles bewtween stator and rotor, you can increase speed of stator filed (and so increase efficiency) and
increase torque output with all magnetic planetary gear system (also antislip) and without mechanical losses and noise.

 

[Merlin]

For QS v3 interessted guys....

took a 32km ride (most flat) with a buddy on 2 Raptors.

Same Controller, Same Wheels(19"), Same Setup.(70A Flux-150A Battery)

(QSv2)Cromotor v3 9kv vs (QSv3)Cromotor v4 11kv

No need to tell the 11KV accelerates up to 85kph with full 10-11KW.
the 9KV only up to 70kph.

After that Ride the v3 had 95° Motortemp, the v4 only 45°

that was to be expected. for a meaningful comparison you need to adjust battery volts and amps on one setup so that both motors have same unloaded speed and power - especially if you have field weakening maxed out.
was the bike with V3 cro accelerating faster from a dead stop?

the v3 cro (v2 qs) was slower even from a dead stop. But his Booty have 10Kg more, so i got his Kamera Backpack and tried to even the weight diff.
but i dont want to say its about the Motor. Because first 10kmh sounds "bad" when he gives full throttle from zero.
Both (me and him) dont care about full throttle from dead stop. Its the accerlerating in midrange 20-70kph we like. And here (as expected) the 11KV pushes more amps and goes alot better.

to compare, how can i setup volts/amps to get the same "unloaded" speed?
both run at 20s. I cant cut off some cells to match unloaded speed. Since unloaded speed only need some watts, it wouldnt help to limit amps.

if your question is about temperature we will limit both bikes to 2000w and run uphill a 5km trip.
after that (both are closed and not vented) i will measure motor case temp also.

 

[snellemin]

the v3 cro (v2 qs) was slower even from a dead stop. But his Booty have 10Kg more, so i got his Kamera Backpack and tried to even the weight diff.
but i dont want to say its about the Motor. Because first 10kmh sounds "bad" when he gives full throttle from zero.
Both (me and him) dont care about full throttle from dead stop. Its the accerlerating in midrange 20-70kph we like. And here (as expected) the 11KV pushes more amps and goes alot better.

If the bike with the "bad" sound is using a Sabvoton, I would redo the hall sync procedure and make sure the motor pole count is correct. I had a bad sound on mine and redoing the hall sync fixed my issue. When the pole count is wrong, motor temp rises a bid more and regen doesn't work as strong.

 

[Merlin]

its only up to 10kph...after that it is silent as you expect from a sinewave.
regen works strong. this is my old setup. just his own sabvoton controller.
i will told him to do the hall angle test again. do no if he did it right. Pole count? can you explain how the pole count can heat up a motor?

 

[snellemin]

its only up to 10kph...after that it is silent as you expect from a sinewave.
regen works strong. this is my old setup. just his own sabvoton controller.
i will told him to do the hall angle test again. do no if he did it right. Pole count? can you explain how the pole count can heat up a motor?

The pole count is an observation I had made while messing around with the controller. I was curious in what would happen when going overboard with all the settings. I found my motor was hotter then before and I got way more Ah back using regen.

 

[ziltoid81]

There MUST be something wrong with the setup for the QSV2.
32km in over 2 and a half hours......even my smaller MXUS would do that cooler.
I commute ~15km in ~20-25min......a few dead stops, but less meters of elevation compared to you, maybe around 50......but you took much more time.

I know its unfair to compare different routes and driving styles, but i have to give the MXUS a beating to let it stay at 95°C for this time, considering the current temperature in germany.
So if i had 2h39 for 32km, i would have over 1.5 hours to cool the motor down, cause im already arrived. :wink:
Or i take my time during the ride and the motor will not heat up at all.
Now its FF in the MXUS, but for that distance and time......i wont need the FF at all to stay under 90°C.

I guess your temp for the QSV3 is quite normal for that given distance and time, but the other setup is far off.
This little more copperfill for the V3 wont do THIS difference in performance.

Imagine your V3 with the use of FF..........

I guess i can torture my future QSV3 all day long with the use of FF.

 

[Merlin]

thats not the total "bike running time" dude
13km to the point we meet......talking about ebike shit, drinking something and then go for a ride

we started with a cool motor.

(iam still waiting for FF ;D)

 

[ziltoid81]

So after 13km you rode the remaining 19km with 2 motors cooled down?

Without the right riding time its hard to compare it.

But again, the V2 have a litte less copper fill, but the lower kv.
It should not be THIS hotter.
Or maybe you were that fast, that the V2 was in ovs, flux weakening etc. all the time and the V3 not.

 

[Merlin]

yes...cruising to meeting point. motor cooled down to ambient (around)
and then we take the "rest" tour.

i know thats not that exactly way to compare. but the difference was so huge that i was wondering.

we will do a better test as i said. with same power level, way, amps etc.

 

[madin88]

to compare, how can i setup volts/amps to get the same "unloaded" speed?
both run at 20s. I cant cut off some cells to match unloaded speed. Since unloaded speed only need some watts, it wouldnt help to limit amps.

if you like to stay with 20s on the 9kV QSV2 setup, you should adjust the 11,4kV QSV3 setup like this:

11,4/9 x battery amps and 9/11,4 x battery volts
i would adjust phase amps and field weakening amps the same or even disable field weakening.

than you should get similar topspeed and acceleration for a meaningful comparison.
but make sure there is no problem with the hall setup, because the "bad sound" you have on the V2 isn't normal with an FOC controller..

 

[maydaverave]

Hello Vito, I wish to buy aQS 17inch 8000W 273 (50H) E-Scooter Extra/V3 Type Hub Motor. I need to know the spacing width of the axle and what winding would be best for about a sixty mph (100 kmh) cruising speed at 96volts? A bit more spped wouldn't hurt. Guess I'm looking for the best copperfill that could achieve this. Thank-you. It's for a motorcycle about two hundred pounds I hope.

 

[BobTheBuilder]

http://youtu.be/lsdCo01Tcg0
I finally got my Defkon D1 tuned right. It does 83mph @ 134v with the 205 (50h) 96v 930rpm V3. I'm using a 250amp Kelly controller. (Don't mind the "temporary" red tape in the video)

 

[macribs]

Wow that is some serious speeding 8)

• Is the bike stable at so high speed?
• How is the acceleration, hard to keep front wheel down?
• How is the motor temp on repeated accelerations?
• The pic you posted is that from an app for the controller?

What is the model of the Kelly controller you are using? They have so many different controllers without model number it is hard to know which one you are using.

 

[ecycler]

Jeebus. Was that your friend driving the car in front of you? What was the 'ouch' for at the end? Take a rock to the face or hand?

 

[bigbore]

A question for Vito:
How many types were sold by you of the QS 205 (50H) V3 Type?
I have the QS 3000W 205 (50H) E-bike Spoke Extra/V3 Type Hub Motor but it seems that in the past months people bought a non extra V3 like this one? Brushless Motor E-bike 3000W 205 (50H) V3 Type http://wholesaler.alibaba.com/product-detail/Brushless-Motor-E-bike-3000W-205_60293109819.html?spm=a2700.7765678.1998649852.8.0dTa7b

There seems to be a possible incompatibility between the Extra/V3 Type and Adaptto controller.

 

[ridethelightning]

A question for Vito:
How many types were sold by you of the QS 205 (50H) V3 Type?
I have the QS 3000W 205 (50H) E-bike Spoke Extra/V3 Type Hub Motor but it seems that in the past months people bought a non extra V3 like this one? Brushless Motor E-bike 3000W 205 (50H) V3 Type http://wholesaler.alibaba.com/product-detail/Brushless-Motor-E-bike-3000W-205_60293109819.html?spm=a2700.7765678.1998649852.8.0dTa7b

There seems to be a possible incompatibility between the Extra/V3 Type and Adaptto controller.

I think thats the one I have, before the new cover w/english freewheel thread was produced?
but i suspect the stator teeth are the same depth?

BB, have you tried to spin/tune it up yet?

 

[macribs]

There seems to be a possible incompatibility between the Extra/V3 Type and Adaptto controller.

Have you heard of others with the 205 Extra v3 that also has problem using the Adaptto? If more have same problems are you running same turn count? (lower turn count harder for controller, higher tc harder for motor or something like that)
What kind of troubles are you experiencing?
Have you tried to autotune over again or to manually change settings?