Magic pie 3 power setting

[Velcro01]

Hi everyone,
I am interested in the Magic Pie 3. I already have a 36V lipo pack (10s), which I would like to use with it.
Can you limit the power down to 250W with 36v? Or is this only possible with 24v?
Can you easily with between power levels, ie with a switch or do you have to program it with the usb cable each time?
Thanks guys.

Cheers, Martin.

[MAGICPIE3FOCUSPOWER]

Just limit current in the software that's all.

[Lollandster]

According to the performance curve for the MagicPie 9amps gives you the legal 250w output.

[MAGICPIE3FOCUSPOWER]

Yes the MP3 is very efficient, I can ride +/- 38 km with 15A 48V at full speed.

[Velcro01]

So can you select any input current limit with the programming software, or is it just pre-defined steps?
Just thinking about our new AU Pedelec law (250W) or old e-bike law 200W....

Thanks.

Cheers, Martin.

[Lollandster]

For 200w you need to set it to 7.28amps, but I suspect there are 1amp increments. I have blown my internal controller so I don't know. You can play with the programming software without the programming cable.

[Scooter]

How do you adjust power setings on the MPIII without a cable?  I have the cycle analyst...but cannot make heads nor tails of the booklet that came with everything.

Thanx!

[Lollandster]

How do you adjust power setings on the MPIII without a cable?  I have the cycle analyst...but cannot make heads nor tails of the booklet that came with everything.

Thanx!

To use the CycleAnalyst to limit power you need to connect the your throttle to it. If you have the v3 CA then you are in luck because Gary has made some very good instructions on how to do this here. If you have the v2.3 you need to connect the throttle with the CA as a pulldown and I'm not entirely sure how to do this. You may ask Justin or maybe Gary has done that before.

I think what you need to do on the v2.3 is to take the green CA-DP wire and connect it to the throttle wire. Almost like on the v3 except you let the throttle wire continue into the controller instead of running it through the CA.


When you get the throttle override working you can go in to the CA settings and input whatever wattage you want to be your max. But you need to check the efficiency curve if you want to run it at max legal. If you set the CA to 250w the MP3 will only output ~200w, so you need to set it to about 330w. The bad thing about the CA is that you can't easily set a overshoot point like the peak power setting on the controller. This means you are missing out on some of the power that would otherwise be legal you use (peak power).

You cannot adjust any settings on the controller without the programming cable, but you can play with the program to get a feeling of what you are missing out on.

[GM Canada]

How do you adjust power setings on the MPIII without a cable?  I have the cycle analyst...but cannot make heads nor tails of the booklet that came with everything.

Thanx!

Without knowing which Cycle Analyst you have it is difficult to answer. Lollandster pointed you to my CA3 info. If you have version 2.xx you need to look at this link.

http://goldenmotor.com/SMF/index.php?topic=2420.msg13626#msg13626

This is a summary and discussion about when we first figured out the CA2. It was summarized from another thread here.

http://goldenmotor.com/SMF/index.php?topic=1490.msg9978#msg9978

The link takes you to the post where I declared Success!. Keep in mind this was with a CA v211. The circuit board was a lot bigger then. The board on the CA v2.3 is tiny and pretty tricky to solder on unless you have some previous skill. I ruined a CA v2.3 just before I went to CA3 on My bike. This is going back in time a bit. I was using a PRO901 kit back then on a JOYeBike. So be careful when we discuss throttle wire colours! Boy that sure seems like a long time ago now But this is where I nailed it with some good advise from Alan, No surprise there You will have to scroll back a bit to see the conversation develop.  Actually to read this thread from the beginning is quite interesting. I remember it went on for quite a while. That is one draw back on long threads in the forum, topics wander and are hard to find again. To find this one to a bit of searching.

This actually reminds me of how things were back then. I was not as busy as today and did enjoy experimenting. People would post in the forum "has anyone tried one of these with one of that?" When no one would reply, off I went to my stock and started testing stuff. I was like a guinea pig under influence from the forum. I learned a lot back then Another thing I recall building was my dual drive 902 bike that no one had seemed to try before.

http://goldenmotor.com/SMF/index.php?topic=2872.msg17466#msg17466

That bike was awesome to ride! Gawd I have built so many bikes now

Also Duck did a pretty good job here with the CA2 and MP3. 

http://goldenmotor.com/SMF/index.php?topic=4598.msg26524#msg26524

Gary

[Lollandster]

I like your dual 902, I have to read through that thread.
I just checked the CA manual because I remember Justin saying that the circuit board now has the diode built in. I didn't find that info, but I did find that in section 9.3 it describes how to setup the v2.3 with the CA in full control just like on the v3. In this case you can connect it like Gary explains in this post except you need to connect the throttle to the Vi pin on the CA circuit board and the controller to the Th pin on the CA circuit board (The CA-DP plug uses the ThO pin which has a diode in it, so don't use that).