help, motor running backwards

[jesusjesus]

controller:
http://www.ebay.co.uk/itm/Electric-Bicycle-Brushless-Speed-Motor-Controller-72V-1500W-For-E-bike-Scooter-/181128813380?pt=UK_BOI_Industrial_Automation_Control_ET&hash=item2a2c1e5b44

got it running forwards, but it is very noisy at low speed. then suddenly it wil only run backwards, what going on?

thank you

 

[izeman]

you got the wrong hall/phase combination. you must rearrange them.
look here: http://www.endless-sphere.com/w/index.php/Determining_the_Wiring_for_a_Brushless_Motor

 

[skeetab5780]

It looks like that controller is capable of being reversed by the "self learning jumper" So not only do you have to figure the correct hall/phase combination but once its spinning properly, forward or backward then you can use this "self learning" jumper to change the rotational direction.

You typically plug the jumper in prior to the battery then once it hesitates and changed directions you need to unplug the jumper and battery.

Just be careful that while doing this things can get dangerous. try to have the bike upside down and do not have anything interfering with the pedals like a kickstand.

 

[mlt34]

Also, turn the bike off in between changing the order of the motor wires. I've seen some crazy arcs...

 

[d8veh]

You don't have to change any wires, nor find the correct combinations. The controller has the self-study wires, so you have to do the self-study procedure. Then, it'll sort itself out.

Did they give you an instruction for self-study? If so, follow it. If not, connect the two white wires before connecting the battery and switching on. Obviously, you need the motor and throttle connected too. When you power up, the motor will start doing strange things, so make sure the wheel is off the ground. If nothing happens, open the throttle a bit to initiate it. Eventually, the motor will turn slowly forward by itself. You then switch off and unplug the white wires. Next time you start it up, it will mysteriously work perfectly.

 

[jesusjesus]

Hi all

tank you so much for your input.

i connected the self study wires og put the power on, the wheel started spinning up og down for 30 sec. removed power and selfstudy wires - then restarted, works perfectly now!

my gees is that it runs approx. 60 kph on 72v

 

[mlt34]

You don't have to change any wires, nor find the correct combinations. The controller has the self-study wires, so you have to do the self-study procedure. Then, it'll sort itself out.

good call, I didn't catch the self study feature there. I see that feature is becoming more and more common recently. very helpful!