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by larsb
Apr 10 2021 1:10am
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 5
Views: 184

Re: Replacing Controller MOSFETs (Sabvoton72150)

Does motor go faster after the repair? This could indicate a sensor issue. Are you sure the halls are placed ok and wired ok? Easiest is if you have a spare controller/to borrow - if it runs poorly also with a new controller then your motor sensors or wiring is the likely error. Which halls did you ...
by larsb
Apr 10 2021 12:56am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 92
Views: 5146

Re: Yamaha YZF250F

j bjork wrote:
Apr 02 2021 2:20pm
Splitting a module to 6s:
Nice work! :thumb:
by larsb
Apr 09 2021 2:22am
Forum: Motor Technology
Topic: Stator/magnet swept area
Replies: 8
Views: 236

Re: Stator/magnet swept area

The values for airgap flux and linear current density are tricky to understand, but at least the general relationship is there, so you can figure out the overall trend. Units need to be looked at so that they all go together but this is what i would do to estimate a motor from scratch from the equa...
by larsb
Apr 08 2021 7:01am
Forum: EBike Technical
Topic: Programming APT AE96600 controller (update: NOT recommended , unstable program)
Replies: 213
Views: 29574

Re: Programming APT AE96600 controller (update: NOT recommended , unstable program)

What’s your theoretic max rpm?
(It’s calculated as kV x measured battery voltage)
by larsb
Apr 04 2021 3:33pm
Forum: Motor Technology
Topic: What's the deal with ordering from QSmotor?
Replies: 30
Views: 3327

Re: What's the deal with ordering from QSmotor?

It’s Ok, better than the normal chinese dealings. Got good customer service a few times when i had issues. Communication is slow, sometimes stupid but i think it’s partly the language barrier. I trust them.
by larsb
Apr 04 2021 3:54am
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 61
Views: 2217

Re: QS 138 70H with Gearbox

the ‘hall phase angle’ is simply the angle between the sensors. And the ‘hall shift angle’ is this the angle between the sensor centreline and the magnet/pole centreline? Yes, sort of. The hall shift angle sets the triggering of the coils in relation to the hall sensor switch point. It doesn't have...
by larsb
Apr 03 2021 3:24pm
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 61
Views: 2217

Re: QS 138 70H with Gearbox

MikeSnow wrote:
Mar 09 2021 4:26am
Is this motor using 60° or 120°Hall sensor phase angle? I hate that the information about QS motors are so limited.
Always 120 these days. with 60 degrees it's harder to diagnose a hall sensor problem so it's not used in quality motors.
by larsb
Apr 03 2021 3:22pm
Forum: EScooters/EMotorcycles
Topic: QS 138 70H with Gearbox
Replies: 61
Views: 2217

Re: QS 138 70H with Gearbox

5 pole pair, phase angle + or - 60. can't remember. it's in the Votol controller thread. I think the geared motor is basically the same as the non geared since it's name is 138 70H so plenty of people have gotten it working.
by larsb
Apr 02 2021 8:01am
Forum: Battery Technology
Topic: Less volts means more range, amps and torque ?
Replies: 16
Views: 641

Re: Less volts means more range, amps and torque ?

Long story short, the battery voltage should be sized to provide only what is adequate for required max speed and power. Then, more parallel chains can be added to increase energy and reduce the discharge currrent of each cell to an acceptable level to meet the required power level (P=VxI). Either ...
by larsb
Mar 31 2021 11:56pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-200 Controller
Replies: 59
Views: 8261

Re: Votol EM-200 Controller

Isn’t it high side fets and low side fets and three phases.. so 200/(24/2/3) and 50A per fet
by larsb
Mar 31 2021 3:06pm
Forum: Battery Technology
Topic: Less volts means more range, amps and torque ?
Replies: 16
Views: 641

Re: Less volts means more range, amps and torque ?

Yes, i just said that above :wink:
by larsb
Mar 31 2021 2:04pm
Forum: Battery Technology
Topic: Less volts means more range, amps and torque ?
Replies: 16
Views: 641

Re: Less volts means more range, amps and torque ?

That’s too generalised to mean much. A good battery needs to fit your max power AND your continuous power. Good, simple rule is: If it gets hot then it’s too small.

If you’d get one mile more with a 48V setup depends on your system, not only on the difference in volts.
by larsb
Mar 31 2021 1:12pm
Forum: Battery Technology
Topic: Less volts means more range, amps and torque ?
Replies: 16
Views: 641

Re: Less volts means more range, amps and torque ?

Most specs for batteries give the spec at quite high load on the battery since it looks better. let's take an example: We have a molicel P42 cell battery, each cell can take 35A and you have 10 in parallell so it would be often be called a ”350A battery”, if you're lucky they throw in "peak 350...
by larsb
Mar 31 2021 11:46am
Forum: EScooters/EMotorcycles
Topic: INDEX, motorcycle and scooter E-Conversions
Replies: 31
Views: 1200

Re: INDEX, motorcycle and scooter E-Conversions

viewtopic.php?f=10&t=94666#p1386369

Rieju MRT 50 donor bike
Motor: QS138 / 70H
Votol EM-150 controller
LG 20S (2x10sx25Ah) hybrid car batteries
300A Ant BMS
20kW max input
110 km/h top speed
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by larsb
Mar 29 2021 12:57pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 92
Views: 5146

Re: Yamaha YZF250F

How much was it? Been looking too!
by larsb
Mar 29 2021 11:57am
Forum: Battery Technology
Topic: Less volts means more range, amps and torque ?
Replies: 16
Views: 641

Re: Less volts means more range, amps and torque ?

why people don't go crazy with voltages above 100v is that you might not have enough torque because there aren't enough parallel connections ? 1) safety, death and fried fingers. Liability. 2) controller losses go up a lot above 100V components 3) the less you load the battery, the longer it lasts....
by larsb
Mar 29 2021 4:50am
Forum: Motor Technology
Topic: Belt drive for Motenergy ME1003.
Replies: 10
Views: 1932

Re: Belt drive for Motenergy ME1003.

There are many companies that do custom pulleys and they last a looong time. I’d just check what you can get that fits your wallet.
by larsb
Mar 29 2021 4:32am
Forum: EBike Technical
Topic: 3 phase wire combination
Replies: 8
Views: 219

Re: 3 phase wire combination

Can some one explain why one phase combination would work better another? If you match the phases incorrectly then you get the wrong firing order as people have already stated, it can be compared to a combustion cylinder firing too early or late, fighting the rotation direction and the other cylind...
by larsb
Mar 29 2021 12:23am
Forum: EBike Technical
Topic: Expert diagnosis required - Hall faults on Sabvoton 72150 / Crystalite shuddering
Replies: 6
Views: 288

Re: Expert diagnosis required - Hall faults on Sabvoton 72150 / Crystalite shuddering

I replaced all 3 halls (using ss441A unipolar sensors
I think Honeywell ss411 bipolar sensors are the most commonly recommended here, they have a more stable switching than ss441. It’s not necessarily the cause of any problems but for next time :wink:
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by larsb
Mar 27 2021 7:04am
Forum: EScooter/EMotorcycle Build Threads
Topic: MH RYZ (derbi 50cc)
Replies: 38
Views: 1365

Re: MH RYZ (derbi 50cc)

For that you’d need an understanding customer service..not sure that’s ASI:s strong point.
by larsb
Mar 26 2021 1:20pm
Forum: EBike Technical
Topic: Programming APT AE96600 controller (update: NOT recommended , unstable program)
Replies: 213
Views: 29574

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

Is that the 180 motor? Interesting. Please start a thread on it when you’re there :thumb:
by larsb
Mar 26 2021 9:42am
Forum: EBike Technical
Topic: Programming APT AE96600 controller (update: NOT recommended , unstable program)
Replies: 213
Views: 29574

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

Just set the mode dc current to whatever you need and you’re ok. That and the phase current setting obviously needs to be right for your motor. If you don’t know the correct phase angle setting for your motor then that needs to be found. There are a few others that need to be set like low volt/ high...
by larsb
Mar 26 2021 9:33am
Forum: EScooter/EMotorcycle Build Threads
Topic: MH RYZ (derbi 50cc)
Replies: 38
Views: 1365

Re: MH RYZ (derbi 50cc)

When buying ASI from electric race technologies/ERT you don’t always get a password for the controller program so it’s effectively a bricked controller if you need to update something, at least that’s what i’ve seen described here on ES. Sucks.
by larsb
Mar 26 2021 6:16am
Forum: EScooter/EMotorcycle Build Threads
Topic: MH RYZ (derbi 50cc)
Replies: 38
Views: 1365

Re: MH RYZ (derbi 50cc)

Sad to hear that you also have the ERT issues. Controller will be useless without update and it’s not cheap.. Battery looks good, your spot weld energy is a bit too high, it’s almost breaking through the strips. before soldering i’d load the battery with some high current and calculate the internal ...
by larsb
Mar 25 2021 2:41pm
Forum: EScooter/EMotorcycle Build Threads
Topic: MH RYZ (derbi 50cc)
Replies: 38
Views: 1365

Re: MH RYZ (derbi 50cc)

Hi there , will be a 10 front sprocket wit 59 tooth rear sprocket so will be a 1x5.9 gear ratio on a 17 inch wheel. What you guys reckon? bike under 70kg with a qs 138 4kw motor , kelly kls 7250 400 phase amps and 20s10p 21700 samsung batteries. I notice that the controller only comes with a 150amp...