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by larsb
Feb 12 2021 7:29am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1373
Views: 147606

Re: Controller Votol EM-100 ed EM-150

I checked the cables and they burned, both of the three phases and of the Hall sensors. But between the three phases there are 0.6ohm and it seems normal to me. Do you know what the correct value should be? 600mOhm is not normal, it's about 5mOhm Could it still be functional? No, your wiring is bur...
by larsb
Jan 31 2021 6:39am
Forum: Motor Technology
Topic: Split phases and run dual controllers?
Replies: 9
Views: 387

Re: Split phases and run dual controllers?

I should probably read those threads but isn’t it simply that an out of sync will allow one controller to short circuit through the other controllers fets?

Means that it can never work as a concept other than by stroke of luck, for some time..
by larsb
Jan 25 2021 2:48pm
Forum: E-Scooter and Motorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 72
Views: 3700

Re: Yamaha YZF250F

120V max, 800pA 300bA(!)
Read on facebook that apt96600 max batt A at 120V is around 160A, it’s derated from 250A at higher voltage. You better check this with QS for the APT96800 if you’re planning to go this route..
by larsb
Jan 20 2021 3:21pm
Forum: Motor Technology
Topic: Split phases and run dual controllers?
Replies: 9
Views: 387

Re: Split phases and run dual controllers?

Nope, just do it. Doesn’t matter at what distance the wires are from the steel, especially not since they’ll anyway be bundled. Using same set of sensors will activate them at the same time. I’d take care that the phase wires are the same length and routed symmetrical from the motor to each controll...
by larsb
Jan 12 2021 2:41am
Forum: EBike Non-hub Motor Drives
Topic: QS 3000 138 motor bike installation generalized
Replies: 15
Views: 1042

Re: QS 3000 138 motor bike installation generalized

Thought about doing the same with my kona stinky. A bit overpowered, that front wheel will like to fly :thumb:
by larsb
Jan 12 2021 1:27am
Forum: General Discussion
Topic: Is this the same KnightMB that sold us out?
Replies: 188
Views: 33022

Re: Is this the same KnightMB that sold us out?

:es: It’s a really good name. A bit mystic, environmental, makes you curious. I know that us scandinavians are generally better than americans at english but i never found the name hard :mrgreen: My point is: It won’t be easy to find a better name that doesn’t leave a sour taste in comparison. Don’t...
by larsb
Jan 11 2021 2:40pm
Forum: General Discussion
Topic: Is this the same KnightMB that sold us out?
Replies: 188
Views: 33022

Re: Is this the same KnightMB that sold us out?

forum wasn't sold to the highest bidder. The moderators of the forum were already trying to sell it to someone else without asking or informing me, for about $5k from what I remember. So someone that was involved with that secret sale came directly to me to ask if I knew about it. I didn't have tim...
by larsb
Jan 10 2021 11:56pm
Forum: E-Scooter and Motorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 72
Views: 3700

Re: Yamaha YZ250F

How can you tell, rotor surface area? Same max rpms given from QS for both motors Power proportional to rpms*torque -> only torque diff needs to be found Torque proportional to airgap surface * lever given same flux and materials -> (Pi*180*90*(180/2))/(pi*138*70*(138/2))=2.2 But a lot of assumptio...
by larsb
Jan 10 2021 12:39pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: ME1507 vs QS motors
Replies: 13
Views: 1050

Re: ME1507 vs QS motors

That 75-7 & sevcon combination is nice, 50kW
Truly expensive stuff though.

If the apt961000 would be known here, combined with QS138 90H or one of the unobtainable larger QS mid motors.. if i’d been looking for a new build then i’d try that.
by larsb
Jan 09 2021 5:05am
Forum: E-Scooter and Motorcycle General Discussion
Topic: ME1507 vs QS motors
Replies: 13
Views: 1050

Re: ME1507 vs QS motors

Correct, seems that MTPA was introduced in VESC:
https://hackaday.io/project/164932-axio ... -into-vesc
Then i guess next step is to get an axiom :D
by larsb
Jan 07 2021 3:43pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 614
Views: 83038

Re: QS 3000w midmotor

It’s not a standard interface. best bet is to grind it down and just bolt the sprocket you want to the outside of the mount. Could be done with simple tools.
by larsb
Jan 07 2021 12:49pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: ME1507 vs QS motors
Replies: 13
Views: 1050

Re: ME1507 vs QS motors

j bjork wrote:
Jan 07 2021 6:46am
@j bjork: wonder if the bac8000 might do look-up table field weakening. haven't seen any program screens here on ES yet.. might be worth checking

VESC guys seems to be working on mtpa https://github.com/vedderb/bldc/pull/91
by larsb
Jan 07 2021 1:55am
Forum: Motor Technology
Topic: No load motor, controller testing, runaway.
Replies: 16
Views: 432

Re: No load motor, controller testing, runaway.

True, every thread derails after five pages or so. If you don’t have control of the motor then you’re not close, the other parts are easy and could be disregarded if you don’t get them to work. Seems there is at least some new data on the new controllers in the thread now, the old data probably won’...
by larsb
Jan 06 2021 2:52am
Forum: EBike Technical
Topic: Maximizing Copper Fill
Replies: 7
Views: 300

Re: Maximizing Copper Fill

I don’t find square wires to be that difficult but it’s true they cannot be wound as quickly as a softer/lower diameter multiwire wind. The thicker wires have the benefit of being bulletproof in comparison to the super thin wires on many chinese rc motors. Anything less than a true 30% is a poor win...
by larsb
Jan 06 2021 2:26am
Forum: Motor Technology
Topic: No load motor, controller testing, runaway.
Replies: 16
Views: 432

Re: No load motor, controller testing, runaway.

That’s the problem, me neither. The program started out following the manual back when i got my first votol but now it’s not even following the text on the setting screens. Users don’t know which revision of this they got.. it’s a total mayhem.
by larsb
Jan 06 2021 1:19am
Forum: Motor Technology
Topic: No load motor, controller testing, runaway.
Replies: 16
Views: 432

Re: No load motor, controller testing, runaway.

@amberwolf:You should read the Votol thread This controller currently seems to have undergone an update that rendered the program incomprehensible. Any users with Votol issues should be directed to https://endless-sphere.com/forums/viewtopic.php?f=7&t=95969. I recommend to stay away from the Vot...
by larsb
Jan 06 2021 12:30am
Forum: EBike Technical
Topic: Maximizing Copper Fill
Replies: 7
Views: 300

Re: Maximizing Copper Fill

I’ve done some square wire winds, it’s really dependent on the way you shape the wire. This is a 60% winding. F5428A80-C891-4365-9FAF-5BCA42ABB9B2.jpeg From there it’s hard to get a large increase in fill whatever method is used. 90% or whatever is mentioned in the paper won’t ever be wound on a mot...
by larsb
Dec 31 2020 4:37am
Forum: EBike Technical
Topic: Programming APT AE96600 controller (UPDATE: don't buy, unstable program)
Replies: 193
Views: 28079

Re: Programming APT AE96600 controller (UPDATE: don't buy, unstable program)

The fets are rated at 150V, most likely the caps also.
This doesn’t mean it’s safe for 150V, used voltage needs to be lowered/derated to cover voltage spikes.

It’s a grey scale, probably a bit over 120V works and 140V don’t.
by larsb
Dec 29 2020 1:56pm
Forum: E-Scooter and Motorcycle Build Threads
Topic: KTM 200 exc goes electric
Replies: 215
Views: 32001

Re: KTM 200 exc goes electric

It’s weird, i am hoping for about these rpms with 120V
I guess the votols were improved a bit since my early edition. What’s your noload current at 7500rpm?
by larsb
Dec 29 2020 11:49am
Forum: E-Scooter and Motorcycle Build Threads
Topic: KTM 200 exc goes electric
Replies: 215
Views: 32001

Re: KTM 200 exc goes electric

2V out of 80V is 2.5%
Will you even notice a difference?
by larsb
Dec 29 2020 11:39am
Forum: E-Vehicles General Discussion
Topic: Motor Hall Fault
Replies: 44
Views: 883

Re: Motor Hall Fault

Drupa wrote:
Dec 29 2020 4:29am
Does anyone know how to get the excel file of the Port Configuration Setting?
I cant reach that link from any download soure
You won’t need it to get this fixed.. but you can ask QS for it. Judy@tzquanshun.com
Please upload it if you get it.
by larsb
Dec 29 2020 7:36am
Forum: EBike Technical
Topic: Maximizing Copper Fill
Replies: 7
Views: 300

Re: Maximizing Copper Fill

you'll find that those extra wires don't give a large increase in fill if it's not a (really) crappy motor winding. The other thing is that the windings closest to the magnets are more affected by eddy losses. I’ve seen some tests where it wasn't worth it to pack the final layer closest to the slot ...
by larsb
Dec 29 2020 2:18am
Forum: E-Vehicles General Discussion
Topic: Motor Hall Fault
Replies: 44
Views: 883

Re: Motor Hall Fault

@drupa: you should ask j bjork or bartosh to check this thread and measure their Votol hall voltages. I don’t have access to a votol currently. 3V just seems to low to get good function. You can see what noisy hall signals look like here: https://endless-sphere.com/forums/viewtopic.php?f=30&t=87...
by larsb
Dec 28 2020 9:19am
Forum: E-Scooter and Motorcycle Build Threads
Topic: KTM 200 exc goes electric
Replies: 215
Views: 32001

Re: KTM 200 exc goes electric

Looking forward to seeing your results with this mod :thumb:
by larsb
Dec 28 2020 8:47am
Forum: E-Vehicles General Discussion
Topic: Motor Hall Fault
Replies: 44
Views: 883

Re: Motor Hall Fault

”Hall error” in a Votol means your throttle signal is outside of voltage limits. It’s stupid that it’s called hall error since there are potentiometer throttles out there also, Votol should switch to ”throttle error” Check voltage settings for the throttle and throttle connections to fix this issue.