QS 3000w midmotor

[bionicon]

What about flux weakening for that motor? RPM including reduction it seems?

I never had problems with the halls and i am running a sabvoton 72200 at 250battamps and 500fazeamps.
Flux weakening is set at 150amps without problems.

[QSMOTOR]

The testing is without reduction, if with 1: 5.3 radio, the RPM is about 4139
For flux weakening report, will post later.

What about flux weakening for that motor? RPM including reduction it seems?

[QSMOTOR]

Controller of 1000w 2000w 3000w mid drive motor

For 1000w mid drive motor, we suggest EM50SP

Specification:

50S.jpg (48.51 KiB) Viewed 2050 times

Unit price for sample:
1000w mid drive motor: $125/pc
EM50SP(40V/60V): $55/PC
EM7250SP: $70/PC
https://www.alibaba.com/product-detail/ ... 71d2LNPn3I

For 2000w mid drive motor, we suggest EM100SP

EM100.jpg (46.04 KiB) Viewed 2050 times

Specification

100.jpg (56.5 KiB) Viewed 2050 times

Unit price for sample:
2000w mid drive motor: $192/pc
EM100SP: $155/PC
https://www.alibaba.com/product-detail/ ... 71d2LNPn3I

For 3000w mid drive motor, we suggest EM150SP

EM150.jpg (32.4 KiB) Viewed 2050 times

Specification

150SP.jpg (47.94 KiB) Viewed 2050 times

Unit price for sample:
3000w mid drive motor: $235/pc
EM72150SP: $210/PC
https://www.alibaba.com/product-detail/ ... 71d2LNPn3I

[lesta]

Any Votol’s EM 300 controllers coming?

[Grantmac]

Is the EM50 "peak current" battery or phase? Can you adjust phase current?
The EM7250SP is the 72v version right?

[QSMOTOR]

Have not now.

Any Votol’s EM 300 controllers coming?

[QSMOTOR]

The peak current is phase current, rated current and boost current are battery current.

The phase current can be adjusted, but we do not suggest.
Yes, EM7250SP is 72V.

Is the EM50 "peak current" battery or phase? Can you adjust phase current?
The EM7250SP is the 72v version right?

[Grantmac]

The peak current is phase current, rated current and boost current are battery current.

The phase current can be adjusted, but we do not suggest.
Yes, EM7250SP is 72V.

Is the EM50 "peak current" battery or phase? Can you adjust phase current?
The EM7250SP is the 72v version right?

Why dont you suggest adjusting the phase current?

Also what is the maximum RPM of the 1000w when using flux weakening?

[QSMOTOR]

The peak current is phase current, rated current and boost current are battery current.

The phase current can be adjusted, but we do not suggest.
Yes, EM7250SP is 72V.

Is the EM50 "peak current" battery or phase? Can you adjust phase current?
The EM7250SP is the 72v version right?

Why dont you suggest adjusting the phase current?

Also what is the maximum RPM of the 1000w when using flux weakening?

The phase current in the controller parameter is fix, you do not need to change it.
The max RPM for 1000w mid drive motor is about 4000RPM, the max speed can be about 50-60km/h

Thank you,
Judy
E-mail: judy@tzquanshun.com

[larsb]

I have got water in my motor so one hall sensor is dead. Opened up motor and there's a pcb that is activated by a sensor magnet ring.

image.jpeg (160.27 KiB) Viewed 1687 times

I cannot find the exact hall sensor from the markings but it might be a copy of SS511AT from honeywell (precision bipolar SMT mount sensor) since it has C511A 145 marked on it.

image.jpeg (146.63 KiB) Viewed 1546 times

[Bartosh]

larsb, this may actually be a (kind of) good information. However, seems like there was no sealant whatsoever under the little side cover, right? If so, I think you should get replacement parts under warranty. They should’ve applied some silicone in this place in production. Look at the photos attached. Apart from the fact my motor came with broken hall mount (they put some white goo to hold it, instead of replacing the damn thing), there is a substantial amount of blueish sealant applied on every cover. So I think you should report it to QS and expect a replacement. Hope you’re gonna fix the problem soon. Good luck mate.

[Bikegirl]

Just wondering what the shaft diameter is on the 1000w motor?

I'm looking to fit a powergrip belt and pulley to drive a 10inch go kart wheel with a bore of 33mm and 6 holes spaced the same as a 160 mm brake disc.

[SRFirefox]

Can anyone confirm that this comes stock with a taper shaft and 22T pulley? Also, is 6600RPM a hard limit for the 3000W - as in the rotor will self destruct or is it more a limit for core and hysteresis losses, or just as fast as you can go with FW and 72V? I'd think being an IPM that it could probably handle some significant over speeding above it's rated RPM.

[larsb]

Yep, 3000w 138 70h motor comes with 22t pulley and tapered axle in stock version

[larsb]

.. I think you should report it to QS and expect a replacement. Hope you’re gonna fix the problem soon. Good luck mate.

Thanks! I will get a replacement PCB from QS free of charge, it's on it's way

[Bartosh]

Finally I got my hall mount and PCB replacement from QS. Free of charge, of course. So now it's time for some bench (re)testing. BTW I need to admit that I'm happy with the QS support after all

[Speedtospare]

Excellent. Good to hear there supporting the motors. I'm looking into one as well for my next project

[PITMIX]

hello I need to mount a 34 tooth pulley on this engine. Do you know if Qs motor can supply pulleys larger than 22 teeth?
You confirm me that the belt is a 8M 25mm wide? Thanks for your help.

[larsb]

Guess you need to check with QS for the pulley. I guess no but it could be screwed to original pulley.

Belt is 8M20mm, pulley is 25mm wide but some clearance to flanges is needed.

[PITMIX]

ok thank you for the answer I ask the question to Qs but for the moment I have no answer from them.

[PITMIX]

hello, I asked the question to Qs to know if they can provide a pulley of 34 teeth but they propose me to replace it myself. They only shred the 22-tooth pulley, but if I want they can take it apart ...

[larsb]

The axle seems very non standard to me. Tapered axle, woodruff key.. Probably you'll need to machine another pulley quite a lot to make it fit. Will you have so small wheels that you need to go from 22 to 34?

[PITMIX]

Yes because it is a heavy machine of 400 kg. The bridge has a reduction of 8 and it would take 7 or 6 at most.
With a 5kW engine running at 3500rpm, the speed is 30km / h with 8 réduction. But I want to 50km/h.

I found composite pulleys, it is necessary to machine the center to adapt it on the motor shaft. It seems perfect.
https://www.123courroies.com/modules/sh ... duct/72590

[larsb]

Will it hold in composite.. Could be easier to get a smaller driven pulley. What do you men 1:8?

Original gearing is 4.7, if you want 1:6 then you'd need a larger driven pulley

[PITMIX]

On my vehicle there is a primary reduction and a secondary reduction. The secondary reduction is 8 turns for 1 wheel revolution.
I wanted to lengthen the reduction by installing a smaller pulley on the box than on the engine.But smallest pulleys are 22T.
Finally I think that with the pulley of origin it should work very well. Leaving a direct drive between the engine and the reducing bridge will make 4250 rpm to the engine for 50 km / h.
If the engine runs at 5600 rpm it will be 65km / h ... So the engine should not force too much and do not over heat.