Latest Magic Pie very restricted! 15amps?

[Leslie]

Another suggestion is to shorten the existing shunt by a little at a time.

[Leslie]

This seems the right stuff but I cant find any to buy on retail..

RW 45 NICKEL 45% COPPER 55%

A copper-nickel alloy used mainly for its medium range electrical resisitivity and very low temperature-coefficient of resistance.

A Nickel-Copper alloy wire used mainly for its medium range electrical resistivity and very low temperature-coefficient of resistance.Applications include power resistors, shunts, thermocouples and wire-wound precision resistors having operating temperatures up to 400°C.

You need something that doesn't change resistance much when it gets hot, look for high temp co efficiency,

[luisgouveia]

Hello,

It's been a while since I run my mini motor at 444W/666W (10S 37V Lipo battery and magic controller at 12A continuous and 18A peak).

This provides me 20mph on a 20'' wheel but I need more. I want the Magic Pie.

I have some questions about the pie:

1) Why do you use the magic controller (external) with the pie? Isn't the internal controller good enough?

2) If I should use the external controller like you guys do, how can I change it to give me more than 15A?

3) Do you know something more about the Magic Pie II? When will it be available?

Thanks a lot guys!

[o00scorpion00o]

Hello,

It's been a while since I run my mini motor at 444W/666W (10S 37V Lipo battery and magic controller at 12A continuous and 18A peak).

This provides me 20mph on a 20'' wheel but I need more. I want the Magic Pie.

I have some questions about the pie:

1) Why do you use the magic controller (external) with the pie? Isn't the internal controller good enough?

2) If I should use the external controller like you guys do, how can I change it to give me more than 15A?

3) Do you know something more about the Magic Pie II? When will it be available?

Thanks a lot guys!

Hi luisgouveia

The Magic Pie external controller is offered by GM because of customer demand, ( you don't have to use GM's external magic controller) for people who want more power for climbing hills or acceleration. Or top speed, by using a higher battery voltage, 60 volts or 72 volts the Higher voltage will give you a higher top speed. Current gives you torque. @48-52 volts you will get a max speed of 25mph from the pie!

I would not recommend modifying the controller in any way as I have fried 2 of them by doing so. If you want more power ( more than 700-800 watts) and the ability to use more than 52 volts, then you need a different controller from a different manufacturer.

To the best of my knowledge, the pie II will be available sometime in 2012!

[e-lmer]

1) Why do you use the magic controller (external) with the pie? Isn't the internal controller good enough?

The magic controller came out before the Magic Pie.

Before the pie, the motor did not have a built in controller.

They had an old version of the controller that seemed to have
been problematic.  On the plus side, the older controllers did
have the wires coming out of the end instead of out of the face
(WTF G.M.?) so it fit in the frame a little better.

I upgraded my controller to the magic controller and am still
using it on my 500W wheel.

The 1KW Magic Pie bike is together except for the batteries. 
I just requested an invoice from Echo
for two 24V15AH packs to hook in series for my Magic Pie.

I want to mount one on each side along the rear frame to balance
the bike and keep the center of gravity (CG) as low as possible.

I am still trying to find out about balancing both packs,
tho I suppose two 24V chargers will not kill me instead of a 48V
charger.