OH NO !!!! Wheel not turning !!!! Put under load !!! Help Yet Again!!!!!

[bilabonic]

Hi All

Just done small trip to shop and got no pedals at the moment due to derailler so ALL on motor.

Came back up a moderate hill as usual and then my steep hill of about 5m (which i usually pedal assist up) and it was if the back motor jammed up, felt the supply cable to motor and it was warm so must of been drawing high current.

Voltage fine on battery, tried different throttle etc, controller was 'very slightly warm' but nothing unusual.

Is there a thermal trip/overload anywhere or fuse on motor/controller.

Where do i start fault finding, check the balance of motor and to earth ?

Does the controller have a fuse/cut/thermal overload ??

Could i have blown a triac ?

ARRGGHH !!!!!


Again....lol

 

[bilabonic]

Well motor measures 0.3, 0.3 and 0.4 ohm, across three phases. Which seems low to me but ok.

 

[Sacko]

Take the controller apart. I would imagine the large trace on the bottom of the board has blown.

 

[bilabonic]

Take the controller apart. I would imagine the large trace on the bottom of the board has blown.

Will do, i know the one your on about.

 

[bilabonic]

Yep, what,s the best repair for this, stranded wire, covered in solder ?

Or is iw worth using some 10 AWG stripped back at the points it connects to components, can not believe there is no protection !!!!



Shall i check anything else whilst open ?

 

[Sacko]

I had the same on my KU123 controller a while ago, I had a spare controller on the shelf, so just swapped it out.

Im surprised the traces aren't beefed up in anyway. Beef up the trace with the 10awg, and see what happens.

 

[KirstinS]

I have a spare generic 14a controller for a 250w bike if this helps (it came with my 8fun kit)

 

[bilabonic]

Still nothing, i tried it with case off and have an led which flashes 4 times then pause then four and so on.

I can hear i very light click from controller when i give an input though.

 

[bilabonic]

I have a spare generic 14a controller for a 250w bike if this helps (it came with my 8fun kit)

Would that work ? Think it may be to small ??

Need one asap !!!!

 

[Sacko]

Which controller do you have?

 

[bilabonic]

KU123.

Need one ASAP as i use bike for work !!!!

 

[KirstinS]

Don't think my spare will work on more than 250w

 

[bilabonic]

Don't think my spare will work on more than 250w

Nor me mate, scouring everywhere to try and find a UK source, no luck

 

[banbury frank]

Hi 36 volt 500 watt controller in uk

ELECTRIC BIKE E BIKE CONTROLLER 36V 19A SENSORLESS & SENSOR COMPATIBLE | eBay

Hope this Helps

Frank

 

[bilabonic]

I've been searching for 500w....

 

[Deleted member 4366]

When the track burned, it will have cut off one or two phases, but one will still be on, but with the motor effectively stalled, so massive current would go through any phases that are still on, and it would blow the MOSFETs. Unfortunately I've got rid of all my spare 12 Fet controllers. Fank at Xipi might have one.
Or this on on Ebay
DIY Cycling 48V 500W Brushless Electric Bicycle Controller - UK SELLER | eBay

 

[Deleted member 4366]

I forgot to mention that if you use a 48v controller, it'll switch off when your battery reaches 38.5v, so you can only use half the capacity of your battery (10aH). Or, you can convert the controller to 36v by changing a resistor inside or, if you're lucky, by joining a couple of solder pads.

 

[bilabonic]

Hi 36 volt 500 watt controller in uk

ELECTRIC BIKE E BIKE CONTROLLER 36V 19A SENSORLESS & SENSOR COMPATIBLE | eBay

Hope this Helps

Frank

Just wired this up and still nothing ???

 

[Deleted member 4366]

Did you join the ignition switch wires together?

 

[bilabonic]

Yes, i shorted the red/orange wires. I also noticed the yellow and green where opposite on the hall sensor, tried it both ways and still nothing, got flashing LED on the pcb ???

When i disconnect them i lose the LED.