General Category > Magic Pie & Smart Pie Discussions

Magic Pie 4 (Vector Control)

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Morgen 3Eman:
Thanks for the heads up, Alan

Dennis

Hastings:
OK Bad timing......   . Does anyone know how well vector control with work with the Cycle analyst/Thun xcell rt  and the external shunt I just got for my second Ebike. I know it is early days.. is there any reason it shouldn’t work ....?
 Due to weight constrains as well as a wish to have a little bit of exercise I probably will go with the Vector Smart Pie.

GM Canada:
Hi Hastings.

The bike I am doing my testing has the full thun-Cycle Analyst setup on it. I find everything works perfectly.

Here is another new Video on the Magic Pie 4 Vector. You can really tell this is a super quiet and powerful motor. I'm Loving it.

https://www.youtube.com/watch?v=fgyHPIIjmMU

Gary

rkts:
Well I've just did a test ride on proof of concept front MP3 fitted with Vector with some mods on winding  (I was not told what exactly was done - phase shuffle?)
All is working fine. I do not see any ON/OFF behavior however torque is low, especially from full stop. It feels more like 2-3A on MP3 however CA readings shows around 20-25A on full throttle. 
Actually I've tried to hold bike with rear brake and do WOT from full stop so it even does not spin front wheel while CA shows around 10-15A draw. Wheel just stays on the ground and after few seconds controller shuts the power to the motor due protection.
I'm not saying it has difficulties to start spinning but it's slow to reach it's RPM even when wheel is lifted. I can ride it from full stop but nothing to compare with original mp3...

Any ideas on why torque is so low? Could it be HAL sensors connected in wrong order or motor would not work in that case at all?



--- Quote from: Bikemad on August 05, 2014, 02:33:19 PM ---
I don't know exactly what was changed but I believe the sequence of the coil windings and the positioning of the hall sensors has been altered to optimise the power and efficiency in both forward and reverse directions.

I don't think that automatic Delta "Y" switching will be an option with the current vector controllers, but as GM are continually improving controllers, I guess it may be possible sometime in the future.

The vector controllers are not universal like their predecessor, they are specifically programmed at firmware level to suit the specific motor that they will be fitted to, therefore a Smart Pie 4 Vector controller is not suitable for the Magic Pie 4 motor (and vice versa).

I have already discovered that the MPIII doesn't work very well with the Magic Pie 4 vector controller, and also that it won't even run with the Smart Pie vector controller. ::)

Alan

--- End quote ---

Barbados:
does the sinus controller in the Magic/Smart Pie 4 got a protection against the arc which
occurs when a controller is connected to a battery and which burns down the contacts?
(the capacitors drawing heavy amps for the blink of an eye)

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