Search found 64 matches

by Schlafmutze
Feb 08 2020 3:36pm
Forum: Battery Technology
Topic: 4.1V 4s2p - bms with adjustable top and bottom cutoff
Replies: 29
Views: 2077

Re: 4.1V 4s2p - bms with adjustable top and bottom cutoff

Get an off the shelf 4.2v BMS and just charge to 4.1v, cells do stay balanced prett well and you only really need to charge up to 4.2v to balance them every now and then. I've got a 16P20S 18650 pack on my ebike that I only charge to 4.0v/cell, I've used it like this since last summer when I last ra...
by Schlafmutze
Jan 24 2020 6:16am
Forum: Motor Technology
Topic: Mobipus 72200 problem when writting
Replies: 2
Views: 463

Re: Mobipus 72200 problem when writting

I've got similar issues programming a 72200.

Desperately need more documentation and openness around the software portion on these controllers.
by Schlafmutze
Dec 09 2019 4:43am
Forum: Items for Sale - New
Topic: Mobipus Controller Official
Replies: 49
Views: 8733

Re: Mobipus Controller Official

I've got my hands on a 72200 that I've been using for a few years, excellent in every way except programming. I've tried getting access to programing regen breaking and phase shift/flux weakening but to no avail, no response to emails. Haven't really needed regen breaking until recently, as I now li...
by Schlafmutze
May 10 2019 3:17pm
Forum: Battery Technology
Topic: end cells always fail first, why?
Replies: 15
Views: 1352

Re: end cells always fail first, why?

Either because of mechanical or temperature reasons.
Say if there are connections soldered onto those areas that heat cells above safe levels during production.
by Schlafmutze
Apr 14 2019 3:23pm
Forum: E-Bike Technical
Topic: Recommended Soldering Iron for 5AWG?
Replies: 11
Views: 890

Re: Recommended Soldering Iron for 5AWG?

I solder 4 AWG with a weller WS81, using fat tip.
A TS100 with a fat tip will work too.

That 80w Iron is enough to solder long pieces of AWG4 onto my BMS PCB even.
by Schlafmutze
Feb 13 2017 7:23pm
Forum: E-Vehicles General Discussion
Topic: Linear Technology’s LT8315 monolithic flyback regulator
Replies: 3
Views: 594

Re: Linear Technology’s LT8315 monolithic flyback regulator

What sort of voodoo are they using to see what the output voltage is if it isn't electrically or photo coupled to the IC in some way?

Also that would be pretty nice to have regardless of your ev project, though shame the output current isn't higher.
by Schlafmutze
Feb 13 2017 12:23pm
Forum: E-Bike Technical
Topic: Weight in relation to the range of one battery
Replies: 10
Views: 1137

Re: Weight in relation to the range of one battery

It all depends on how much battery you already have to begin with, if say the battery is only 5% of the whole weight of your bike and yourself, making the battery twice as large thus making it 10% of total weight would in fact double the range. One thing to keep in mind though that under normal usag...
by Schlafmutze
Feb 12 2017 5:43pm
Forum: E-Bike Technical
Topic: Mobipus Controllers
Replies: 170
Views: 22805

Re: Mobipus Controllers

Does ballaratebikes ship outside of australia?
My kelly KLS just died on me and I'd really like to get one of these, I'm working on a display for my bike that runs full version of windows 10 on a raspberry pi size computer, and having a dashboard like that would be pretty sick.
by Schlafmutze
Jan 31 2017 12:03pm
Forum: Motor Technology
Topic: Kelly KLS strange behavior when configuring new motor.
Replies: 2
Views: 467

Kelly KLS strange behavior when configuring new motor.

I'm configuring my controller (KLS7240S) (350a phase) for a QS 205 v3 motor, KLS series has a auto identification feature that calibrates the controller for the motor hall sensor angle and whatnot. QS 205 V3 has far as I know 16 pole pairs, I have also typed that into the controller configuration ap...
by Schlafmutze
Dec 12 2016 8:15am
Forum: Motor Technology
Topic: How to determine the caps parallel to the DC-supply.
Replies: 12
Views: 1060

Re: How to determine the caps parallel to the DC-supply.

Few things to note is that battery current and motor current are different, the latter usually always being higher. As far as ripple current on capacitors mean RMS, so a capacitor rated for 10a ripple can do 100a peaks without issues, 10a is just the average value. With such low currents you're goin...
by Schlafmutze
Dec 11 2016 5:42pm
Forum: Motor Technology
Topic: How to determine the caps parallel to the DC-supply.
Replies: 12
Views: 1060

Re: How to determine the caps parallel to the DC-supply.

Ok, but why does he put 4 caps of 220 µF, why not putting one of 1000 µF in each phase? If it's just to smooth the current spikes then this should also work, right? Yes it should work to use 1 1000uf capacitors, but the reason why you often see lots of smaller capacitors used in parallel instead of...
by Schlafmutze
Dec 11 2016 11:52am
Forum: Motor Technology
Topic: How to determine the caps parallel to the DC-supply.
Replies: 12
Views: 1060

Re: How to determine the caps parallel to the DC-supply.

The caps you're talking about are connected to the battery + input, they're put there to help smooth out the current spikes that would otherwise be loaded onto the battery. The small ceramic capacitor is put there as well to help reduce EMI induced from the high frequency switching that the mosfets ...
by Schlafmutze
Dec 02 2016 11:53am
Forum: Motor Technology
Topic: Small backup motor controllers.
Replies: 1
Views: 390

Small backup motor controllers.

Hello, figured I'd start a new thread about backup controllers, especially for e-bikes. Seeing the tendency for certain controllers to fail, wouldn't a small backup controller permanently installed be a good idea? I looked into running cheap RC ESCs for emergencies, but it seems that they use PWM si...
by Schlafmutze
Aug 27 2016 10:34am
Forum: Motor Technology
Topic: Controller mods
Replies: 5
Views: 803

Re: Controller mods

Is modding a controller to 125v doable? Totally. Is it practical? probably not. If you want to run a controller at 125v you're firstly going to need to change out the Mosfets to something higher than 125v rating, and even if you do that it isn't unlikely that the voltage buck converters in the contr...
by Schlafmutze
Aug 09 2016 3:21pm
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 7661

Re: A123 prismatic cells - THE solution?

A123 cells are very good, I have been using 24s 20Ah pouches on my bike for two years now, though it seems like the pouch cells aren't as tough as cylindrical cells, regardless they take a fair amount of abuse. I'm pushing over 100a battery current, though my cells have degraded somewhat, and I want...
by Schlafmutze
Aug 05 2016 2:37pm
Forum: Battery Technology
Topic: Charger voltage adjustment
Replies: 3
Views: 620

Re: Charger voltage adjustment

How can anyone know if we don't know what charger it is??

The way I get around this is to measure the output, then slowly turn each pot until the voltage moves, though if it doesn't move adjust back to where it started.
by Schlafmutze
Jul 24 2016 12:54pm
Forum: Motor Technology
Topic: Ultimate Cromotor V4 mod
Replies: 14
Views: 2288

Re: Ultimate Cromotor V4 mod

Those motors look sick.

Any more information?
Also cromotor V4? I thought the V3 was the newest one, source?
by Schlafmutze
Oct 10 2014 3:33pm
Forum: Motor Technology
Topic: Golden Motor VEC300-96
Replies: 8
Views: 1305

Re: Golden Motor VEC300-96

Then its a issue with the CA and not the controller.
by Schlafmutze
Oct 08 2014 2:27pm
Forum: E-Bike General Discussion
Topic: witch motor to choose?
Replies: 7
Views: 755

Re: witch motor to choose?

TC65 sounds like what you are looking for, be keep a eye on the temps though.
by Schlafmutze
Oct 08 2014 1:53pm
Forum: E-Bike General Discussion
Topic: Qulbix raptor efficiency?
Replies: 20
Views: 2213

Re: Qulbix raptor efficiency?

Is all of the phases alright? hall sensors etc.
by Schlafmutze
Oct 06 2014 3:20pm
Forum: Battery Technology
Topic: Bring SLA batteries inside for winter?
Replies: 12
Views: 1150

Re: Bring SLA batteries inside for winter?

Bring all the batteries inside during winter, unless you're planning to store them.
by Schlafmutze
Oct 06 2014 2:11pm
Forum: Motor Technology
Topic: Motorbike Motor
Replies: 60
Views: 10320

Re: Motorbike Motor

Wouldn't that cause excessive eddy currents?
by Schlafmutze
Oct 05 2014 7:53am
Forum: E-Bike General Discussion
Topic: Tc80 burnt...
Replies: 28
Views: 2965

Re: Tc80 burnt...

If you want to do hill climbing a temp sensor is a must, setting the t max to 90-100c before it starts to throttle down the power so you don't burn the motor. High amps at high RPM isn't much of a issue, but high amps at low RPM can easily burn your motor if you're not paying attention. Keep in mind...
by Schlafmutze
Oct 05 2014 7:47am
Forum: Battery Technology
Topic: 90V high amp battery needed
Replies: 9
Views: 910

Re: 90V high amp battery needed

24 cell of a123 20ahs don't fit in the raptor, either of them.
by Schlafmutze
Sep 30 2014 11:46am
Forum: Battery Technology
Topic: Large transformer as charger
Replies: 3
Views: 417

Re: Large transformer as charger

You're going to need something to control the voltage, as rectifying it will make 105VDC.

67ac*1.57=105vdc

Pi/2=1.57.

Though the transformer likely has isolation, so its safer than directly using power from the wall.