Measurements from the motors: QS165v1: Armature: 114mm x 35mm, 55 strands of 24 awg, wired WYE, flat magnets, magnet gauss: 1500 to 1400, stator weight: 3.57kg, armature weight: 2.02kg, phase resistance: 13.25 mOhms, phase inductance: 146 uH QS165v2: Armature: 99mm x 35mm, 40 strands of 24 awg, wired WYE (see note), V magnets, magnet gauss: 1500 to 3700, stator weight: 4.29kg, armature weight: 2.23kg, phase resistance: 9.01 mOhms, phase inductance: 131 uH Note: The V2 motor appears to have 2 sets of WYE windings in parallel, NOT delta like I say in the video. IF this is the case then the V2 effectively has 80 strands in parallel. This would explain the dual bundles for dual WYE winds on the same stator. The 2 sets of starts are 180 degrees apart from each other so this is likely to be how this motor is wound. bEMF ought to be interesting!
Can you give a figure for the bEMF voltage at a given rpm? Maybe turn the shaft with an electric drill and measure between 2 phases with a true RMS multimeter? Thanks and keep up the good work!! *subscribed*
@@johgude5045 I have an o-scope. I've done this with a bunch of motors already. I was more interested in how clean the bEMF was than the voltage. Some motors are pretty bad and others are clean sinusoids.
The V1 has straight stator teeth and turns without cogging at all. The V2 has sloped teeth and cogs a fair bit. I have to wonder how much it would cog if the stator teeth were straight.
LOL! I'm in the USA. We are dual standards here! It's confusing as hell! I go back and forth between metric and SAE all the time! First few takes of this video, I was doing the weights in pounds and thought "This is dumb! I'm doing everything else in metric. Why am I using pounds for the weight?". So I switched the scale to metric and remade the video all metric.
The caps come off the bearings pretty easily. Just pull straight off and they will probably slide out of the end caps. Get the bearing wracked a tiny bit and they bind up.
@@de-bodgery brilliant thanks, I’ve got a QS 138 50H which I’m going to strip like you’ve done to check windings and bindings. Also to install a temp sensor as it doesn’t come with one fitted.
for the qs motor, you should reprocess the connector to avoid phase loss when operating, it is cos pressed while the outer layer of paint is not high enough.
@@vanhanhpham5750 I tin all the ends, compress them together in the ring terminal and then add solder to fill in any remaining voids and to totally tie together all the strands inside the terminal.
Can't say without taking the windings off and I'm not doing that at least not for now. I want to do some efficicny tests. Later maybe, I'd like to rewind the V2. I've wound motors, I think I can make it better than the factory wind!
Measurements from the motors:
QS165v1:
Armature: 114mm x 35mm, 55 strands of 24 awg, wired WYE, flat magnets, magnet gauss: 1500 to 1400, stator weight: 3.57kg, armature weight: 2.02kg, phase resistance: 13.25 mOhms, phase inductance: 146 uH
QS165v2:
Armature: 99mm x 35mm, 40 strands of 24 awg, wired WYE (see note), V magnets, magnet gauss: 1500 to 3700, stator weight: 4.29kg, armature weight: 2.23kg, phase resistance: 9.01 mOhms, phase inductance: 131 uH
Note: The V2 motor appears to have 2 sets of WYE windings in parallel, NOT delta like I say in the video. IF this is the case then the V2 effectively has 80 strands in parallel. This would explain the dual bundles for dual WYE winds on the same stator. The 2 sets of starts are 180 degrees apart from each other so this is likely to be how this motor is wound. bEMF ought to be interesting!
Can you give a figure for the bEMF voltage at a given rpm? Maybe turn the shaft with an electric drill and measure between 2 phases with a true RMS multimeter? Thanks and keep up the good work!! *subscribed*
special thanks for giving resistance figures and figuring out this interesting parallel WYE termination!!
@@johgude5045 I have an o-scope. I've done this with a bunch of motors already. I was more interested in how clean the bEMF was than the voltage. Some motors are pretty bad and others are clean sinusoids.
The slope/angle of the stator teeth/laminations can reduce cogging torque and make the motor a bit smoother.
The V1 has straight stator teeth and turns without cogging at all. The V2 has sloped teeth and cogs a fair bit. I have to wonder how much it would cog if the stator teeth were straight.
Thanks for using kilograms
LOL! I'm in the USA. We are dual standards here! It's confusing as hell! I go back and forth between metric and SAE all the time! First few takes of this video, I was doing the weights in pounds and thought "This is dumb! I'm doing everything else in metric. Why am I using pounds for the weight?". So I switched the scale to metric and remade the video all metric.
Interesting video!! When your taking the caps off each end do the bearings have to be pressed out or are they a loose fit on the bearing outer races?
The caps come off the bearings pretty easily. Just pull straight off and they will probably slide out of the end caps. Get the bearing wracked a tiny bit and they bind up.
@@de-bodgery brilliant thanks, I’ve got a QS 138 50H which I’m going to strip like you’ve done to check windings and bindings. Also to install a temp sensor as it doesn’t come with one fitted.
@@lhk8558 If you don't mind, do a video on your work. Post it to my facebook forum EV Components Review. Thank you!
i want to say V2 is better but the design has quite a few tradeoffs compared to V1 - thanks for this comparison
what trade-offs are you referring to?
the v3 looks like a beast seen no videos on it tho -_-
Never seen a v3 myself.
for the qs motor, you should reprocess the connector to avoid phase loss when operating, it is cos pressed while the outer layer of paint is not high enough.
I don't understand what you are telling me
@@de-bodgery you should redo the connector of all 3 motor phases, because it's done very sloppily.
it is best to solder it before putting it in the connector and hydraulic press, to avoid phase loss due to bad contact causing engine fire.
@@vanhanhpham5750 You mean on my QS165? Mine are soldered pretty well. I've had people tell me there's are not, but I don't think I have a problem.
@@vanhanhpham5750 I tin all the ends, compress them together in the ring terminal and then add solder to fill in any remaining voids and to totally tie together all the strands inside the terminal.
What's the turn count here for both the Motors?
Can't say without taking the windings off and I'm not doing that at least not for now. I want to do some efficicny tests. Later maybe, I'd like to rewind the V2. I've wound motors, I think I can make it better than the factory wind!
@@de-bodgery Please make a separate video on that, if rewind the motor.
Deamn man, kv depends on magnetic flux and winding, you can't just say 1.7 times when comparing completely different motors
I get your point and don't disagree. I probably could have said this better.
Still could be parallel wye, not delta
Parallel WYE, lol, why would anyone do that?
@@de-bodgery probably optimize winding, to not make 1.5T or some stupid number which is hard to wind
Can you please share the contact detail of the genuine qs motor distributor
ummmmmm...QS Motor...they sell direct