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New member with a few questions

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Bargo:
Good morning everyone,

I have just got my hands on few electric bikes that has the golden motor of some version. I’m trying to find more information from them, on the plugs to the motor have three cables one for the battery 2 positive and 2 negative female pins and one 10 male pins and 5 male pins.

I assume the 10 male pins needs some kind of converter cable to go to brakes lights throttle

And the 5 pin goes to LCD

I will come with more questions but I could not find away to tell which version are these.

All my best,


P.s Hello Alan, I could not figure out how can I confirm my membership further, thanks a lot for all the posts.

Bikemad:
Hi Bargo andto the forum.

If the motor diameter is approximately 310mm you most likely have Magic Pies:





As you have the 10 Pin connector they could be any of the following three options;

* late version MPIII
* MP4
* MP5



The wiring of the MPIII, MP4 and MP5 motors is very similar except the MP5 had the additional +5V supply on the controller's 5 pin connector.

The 10 pin connector connects to the control harness similar to the one shown below:


The 5 pin connector is used to connect to the USB programming lead, the LCD Smart display or the Bluetooth dongle on MP5.

Check out this post for more details regarding the cables on the controller.

Alan
 

Bargo:
Thanks a lot Alan for the detailed response, this is much appreciated.

I will Check diameters, but also the 5v on the 5pin cables might be a very good way, I will check if I have any resistance on that pin.

All my best,

Waheed

Bargo:
Hello and good evening,

I measured diameter but it’s far off at ~19cm .

I measured resistance on the 4th pin on the 5 pins cable and I have around 6kohm resistance.

I’m also attaching a photo for the fat wheel.

I would need to buy a new controller harness even though I have a couple of mounted buttons already but I think I need to remake them.

All my best,

Waheed

Bikemad:
The motor shown in your photo is a Smart Pie, but the wiring should be the same as the MPIII, MP4 or MP5 dependent upon which version of the Smart Pie it is.



Your Fat Wheel version will probably have a longer axle and wider dimensions to the ones shown below:



You need to measure the voltage on pin 4 relative to ground (B-) with a battery connected.
A 12V battery should be sufficient to produce the +5V supply on Pin 4 if it is a later controller.

Unfortunately, it can difficult to tell the difference between the early Smart Pies with the Square wave controller and the Smart Pie 4/5 with the vector controller until you hear them under load. The noise emitted from an early Smart Pie increased with the load, whereas the minimal sound emitted by the later motors with the vector controllers only varied with wheel rpm. It did not noticeably change when under load or with the throttle released at the same wheel rpm.

Alan
 

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