Recent content by anpaza

New version for public testing: 0.4.1 alpha. Download here. New features: * Implemented KHxxx (AKA Infineon 4) controller support. * Implemented profile downloading (EB3xx and KH6xx) * XPD for Android (from scratch in Java) (not finished yet, so, no test builds for now)

Hello! Got one of these oldies in a chinese micro-scooter. Since I've upgraded the hub motor from geared 250W to gearless 500W, one of the goals is to enable regenerative braking. Here's a photo of the controller board: (click for larger image) I've tried to solder a small bridge between ABS...

Small video from there. RPMs limited to 1000 in controller setup, because at 2000 RPM water drops reach other exhibition stands. RzUMok6SVFM Startup torque with locked wheel. Battery current during startup with locked wheel.

At 14-17 April, in Monaco, the large asynchronous hub motor (the predcessor of Kolobok) will be demonstrated at the Top Marques exhibition. Who lives close to Monaco may give it a try :) Currently it's mounted into a ElMoto frame, with the Curtis-1232SE controller (48V, 350A max phase current)...

The bike that'll be used for testing current prototype. The thing looks really small, even in a 24" wheel.

Some old pics :) Big size Big size Big size Big size

Some "olds" (as opposed to news, video was published about a week ago). U8NRLRCftZg I took half of hour to add English subtitles. You must click on the "Subtitles" button to see them.

Moar of it. looks extremely tiny for 10 kW, not speaking gearless. We'll see...

Some update. While motor number one (body from Magic Pie I, new stator and rotor) left to Germany for testing in some labs, and the 20 kW motor is waiting for the new controller to finish, they're doing a third motor, which is more of what we call a "bike motor" :-D Stator width 55mm Spoke...

Coreless motors are low-inductance and, as such, they provide lower torque than traditional motors. To compensate for that, coreless motors are very high frequency (they don't suffer the Eddy current & other loses in core). But this means you'll have to add a two-step reductor, so you'll have...

Indeed, at a second sight it looks like an IPM motor. In any case, IPM is not SRM, it's something like a mix between SPM and SRM. Tries to take the best of two worlds.

This is a regular synchronous permanent magnet motor... at 4:00 you can see how the magnets are inserted into the rotor splices... and then at 4:15 you can see the splices slightly repulses each other because magnets are inserted into splices with same polarity. A SRM motor can't have an...

Well, if you add permanent magnets to SRM rotor, you just turn it into PMSM ;-) The stators in permanent-magnet synchronous motors, asynchronous motors and switched reluctance motors is absolutely the same.

Driving them should be pretty easy as they are synchronous motors and you can get it working even without vector control. Perhaps even existing ebike controllers may drive them, just install some type of position sensors (halls won't do because there are no magnets), three would be enough. But I...

We theoretically discussed SRM hub motors on our forum, but came to conclusion that this type of electric motors will provide way smaller specific power (watts per kg). That's because the rotor in SRMs is not magnetic, it's just a piece of iron, so it does not produce any force per se. That's in...