GoldenMotor.com Forum

Hi to all,

I have built an E-Trike with my son. Everything is ready, but the Magic Pie 4 wheel does not turn
and I am quite desperate.

What I already tried:
At the beginning I had a used 24V battery and it did not fonction and no light on the throttle bar (what I found to be normal afterwards).
There was a click at the controller (which should be normal).
I purchased the USB cable and checked if 24V was selected in the program, it was.

I thought the battery was the problem (because it was showing quite high voltages of up to 32V), so I purchased a new 48V battery with up to 1500 W.
I set the voltage to 48V using the USB cable.
I downloaded the new value to the controller.
I removed the USB cable and shut off the battery afterwards.
The battery is charged.
The lights on the throttle bar are on when the battery is on, BUT
again the wheel does not react at all when pushing the throttle....

 Can anyone please help me, I really want this E-Trike ready for my son...

Regards,
Gilles

I should add that the controller model is EZ-A48500

Hi All,

I am working on using the liquid cooled 5kW BLDC motor to run my boat. I am having trouble with cooling though. I have a 5kWh battery and am trying to run wide open for that hour. There doesn't seem to be enough cooling and the motor overheats. Does anybody know the mass flow rate of water that needs to be running through the cooling passage to cool the motor?

Side note: I am using sea water and not a heat exchanger.

Hi Waheed, it sounds like you're not having much luck at the moment.   

There's a strong possibility that you may have melted some wires inside either the main control harness or the throttle cable wiring.

If the +5V feed on the controller harness was not present with everything plugged in, but it returned with just the throttle disconnected, the short will hopefully be confined to the throttle cable itself.

However, if the +5V feed is not present with with just the throttle disconnected, but it returns when the main harness is unplugged, there will be a short somewhere inside the main harness, but there may also be a short in the throttle cable as well. 

You should be able to use a multimeter to check for continuity (or very low resistance) between all of the pin combinations (especially the +5V pins and Ground pins) on both the main harness and the throttle cable while they are both completely unplugged.

If either or both cables are shorted, it/they will need to be repaired or replaced.



I suspect the high current produced during the initial short caused by the LED failure will have overheated the Battery +, Lighting feed and the Battery - (Ground) wires causing the wire core to melt through the insulation on one of these wires and also melting through the insulation of one of the adjacent wires (probably the Battery - has melted into the +5V) which has caused your problem.

Hopefully it will just be the throttle cable that is damaged. Check out this post and this post for further information on checking the throttle.



Alan
 

Hello Again,

I hope you are doing well.

I finally was going to complete my collective setup, but at the last mile I did something wrong, I connected a 36v led to my 48 + - which comes out from the throttle 5 pin cable, after a couple of second the +- battery was shorted due to led short. I disconnected everything and now I can read battery normal, I get 5v everywhere where it should be, but I don't see anything on the throttle signal except -0.02v giving that the 5v makes 5v short to ground, I think something is wrong with the board now, but I wanted to confirm if anyone have any better idea

All my best,

Waheed