Search found 1612 matches

by larsb
Mar 31 2020 2:19pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Why are two speed transmissions not more prevalent?
Replies: 13
Views: 999

Re: Why are two speed transmissions not more prevalent?

I’ve tried to draw some two speed gearbox designs. They’re certainly a good idea if you have access to machines and skill. There are several issues that stop most of the diy gearboxes from being viable. Tight tolerances needed Hardened gearsets cost big bucks and you can’t live without them due to m...
by larsb
Mar 31 2020 2:06pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Quality of Kelly Controllers
Replies: 3
Views: 441

Re: Quality of Kelly Controllers

I’ve killed five kelly KLS controller in short time (then i switched brand) they are poor quality. Some members here reviewed the design, it was also poor.
by larsb
Mar 31 2020 7:53am
Forum: Motor Technology
Topic: Rewinding flipsky 80100 motor
Replies: 9
Views: 960

Re: Rewinding flipsky 80100 motor

Winding sketches with square wire, 19 turns 2x1 and 14 turns 2.5x1.25 respectively. winding comparison.jpg 61% fill and 70% fill for these but kV will be too low. 10 turns of 2.5x1.25 will give kV 91 in delta which is OK and then fill is at a nice 50%, looks measly but still a 60% increase of copper...
by larsb
Mar 30 2020 10:15am
Forum: Motor Technology
Topic: Rewinding flipsky 80100 motor
Replies: 9
Views: 960

Re: Rewinding flipsky 80100 motor

tried the wind today, it was impossible :wink: I forgot i used single tooth winding on my last winds, it really makes a difference. Even 4 turns was quite hard as the wire transits steal room in the slots and the 7 wires start to cross. 4 turns is 35% fill so slightly better than original but not gr...
by larsb
Mar 30 2020 3:58am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 178
Views: 21870

Re: Rieju 50cc conversion

Since it’s cell 10 it’s actually in the middle of the pack (not b-) and there are separate balance wires on all cells

I can see that cell dives from full voltage to bms cutoff with just one max pull, it’s gotten worse and worse..
by larsb
Mar 29 2020 2:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 178
Views: 21870

Re: Rieju 50cc conversion

I tried it a bit at 400A, could’ve been too much with 13C. That 10th cell was always weaker though, since i run the ANT 300A smart bms with display i can see the voltage values every time i ride.

I’ll just fix it, no worries.
by larsb
Mar 29 2020 12:22pm
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 178
Views: 21870

Re: Rieju 50cc conversion

One cell in my packs is getting weak, dives at full throttle. Maybe i’ll have to cut it out and make a 19S system.. lucky enough it’s the first cell on one of the two packs.

Damn it, don’t feel like fixing it, too nice weather :|
by larsb
Mar 29 2020 6:58am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 819
Views: 72366

Re: Votol EM-100 & EM-150 controllers

If your 12V dc-dc dives to 8V when lights are on then the fix is to get a bigger one or change to LED lighting with lower consumption.
by larsb
Mar 26 2020 2:29pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 819
Views: 72366

Re: Votol EM-100 & EM-150 controllers

Try it with a different motor if you can.
by larsb
Mar 25 2020 5:53am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 819
Views: 72366

Re: Votol EM-100 & EM-150 controllers

There are water cooling blocks for the votols on taobao and simple enough to do diy.
by larsb
Mar 24 2020 3:40pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Kawasaki KXF 250 QS 138 70H conversion
Replies: 5
Views: 876

Re: Kawasaki KXF 250 QS 138 70H conversion

Looking to be on a nice track :D
You’ll need 500A phase, 200-250A battery current to fully utilise the motor. It will easily take 22 or 24S.
Vtc5a are capable of 30A, barely, so i’d choose at least 20S20P as it will ease the stress on the batteries and give an ok range - if you can fit them all?
by larsb
Mar 24 2020 11:49am
Forum: Motor Technology
Topic: New to vehicle electrification need a bit of an experienced guid with my Dilemma
Replies: 2
Views: 908

Re: New to vehicle electrification need a bit of an experienced guid with my Dilemma

Think you’re in trouble there. All posts i’ve read about Sevcons are the same: they need a million dollar programming tool and are notoriously hard to program if you don’t have a settings file.

Good luck
by larsb
Mar 23 2020 11:30pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 819
Views: 72366

Re: Votol EM-100 & EM-150 controllers

It will probably disappear when the throttle is fixed
by larsb
Mar 23 2020 3:59pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 819
Views: 72366

Re: Votol EM-100 & EM-150 controllers

I’ve seen hall fault shown randomly but what it means (if it’s ticked constantly) is that there’s an error caused by the throttle.

Either:
Throttle not connected correctly (or broken)
Or:
high volt error or low volt error caused by set throttle limits that are not met by throttle.
by larsb
Mar 23 2020 3:20pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 819
Views: 72366

Re: Votol EM-100 & EM-150 controllers

It would certainly help if the picture was readable. Or turned.
by larsb
Mar 23 2020 12:30am
Forum: E-Scooter and Motorcycle General Discussion
Topic: First build, random questions about hub motors and overall build
Replies: 15
Views: 344

Re: First build, random questions about hub motors and overall build

..and get a mid drive
30 degree slow riding is not where hub motors shine

QS 3000w mid drive kit would fit this project, paired with a large reduction like 10t:100t you'd get a monstrous 560Nm at the rear wheel
by larsb
Mar 22 2020 11:40am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 526
Views: 63079

Re: QS 3000w midmotor

There was a video linked, showing this motor at 30S or thereabouts. Would give 9000rpm or so with FW :bolt:
Highly unsecure info though, wonder what the heating is like at those rpms.

With 5 pole pairs it could still be possible considering the lower erpm compared to most motors.
by larsb
Mar 22 2020 11:34am
Forum: Motor Technology
Topic: Greentime controllers
Replies: 984
Views: 128034

Re: Greentime controllers

Why? Sensorless gives the same or better position sensing as hall sensors at higher speed (if done well), shouldn’t matter what base speed you’re at.
by larsb
Mar 22 2020 10:31am
Forum: E-Scooter and Motorcycle General Discussion
Topic: QS 138 70H Advice
Replies: 2
Views: 1126

Re: QS 138 70H Advice

Yes, motor is capable of this, easily.

Difficulty might be if Kelly is not matching this motor well. Never seen anyone try this.

I’d just buy a votol EM-150 controller kit with motor, always good to have a spare controller. Kellys break often :wink:
by larsb
Mar 22 2020 10:25am
Forum: E-Scooter and Motorcycle General Discussion
Topic: velocifero mad 1600w and Votol-em305
Replies: 1
Views: 1034

Re: velocifero mad 1600w and Votol-em305

You’d need a programming cable and program. Cable can be bought from QS motor or built from a pl2303 serial adapter with a 4 pin connector. Program is in the votol controller thread. Just google it here and you’ll find it. There are some risks as you don’t know which program/hardware match you need ...
by larsb
Mar 22 2020 10:11am
Forum: Items Wanted
Topic: Looking for Adaptto Max-E
Replies: 1
Views: 871

Re: Looking for Adaptto Max-E

Why?
by larsb
Mar 21 2020 12:40pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 819
Views: 72366

Re: Votol EM-100 & EM-150 controllers

upload all screens from the program.

Both throttle sticking and speed limit not functioning can be related to wrong hall shift angle. Is the sound and motor running smooth? Have you driven it yet?
by larsb
Mar 20 2020 1:25pm
Forum: Battery Technology
Topic: battery pack problem?
Replies: 7
Views: 153

Re: Votol EM-100 & EM-150 controllers

There’s no starting procedure.. flip the switch and it’s on. Only way of helping you is if you describe your problems better.
by larsb
Mar 20 2020 1:12pm
Forum: E-Bike Technical
Topic: APT72260 controller comm with Qsmotor 3kw 60v
Replies: 4
Views: 110

Re: APT72260 controller comm with Qsmotor 3kw 60v

You need to set the correct com port and connect, think it’s selected in the ”options” menu at the top of the screen. There are some manuals in this thread:
viewtopic.php?f=2&t=97089