Endless Sphere

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 ...

j bjork wrote: ↑

Apr 02 2021 2:20pm

Splitting a module to 6s:

Nice work!

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...

What’s your theoretic max rpm?
(It’s calculated as kV x measured battery voltage)

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.

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...

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.

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.

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 ...

Isn’t it high side fets and low side fets and three phases.. so 200/(24/2/3) and 50A per fet

Yes, i just said that above

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.

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...

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

How much was it? Been looking too!

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....

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.

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...

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

For that you’d need an understanding customer service..not sure that’s ASI:s strong point.

Is that the 180 motor? Interesting. Please start a thread on it when you’re there

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...

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.

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 ...

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...