strange problem with my 1000w golden motor kit

[besseruud]

Hey. I have a strange problem with my 1000W golden motor kit. when I had just installed it with new Controll it was a strange sound from the engine to the pulled low, a little later it stopped. I took a new engine from my other bike I have spent a long time to know was in order. to put on it, when it seemed ok for a few minutes then came the strange sound of this too.

I then moved the engine back on the bike that I borrowed it from. But then came the same sound and it was also destroyed. so it is obviously controller that has destroyed both engines. does anyone know what could be wrong ?. it is possible to repair this?

thanks for help

 

[Icewrench]

The new controller may need a different combination of phase and hall wires to run the motor.
When the wires are in the wrong order the motor can make noise, runs backwards, or draw way too much power.
Drawing too much power with a bad wiring combo can damage the fets in the controller.
When the right combo of wires is found the motor will run smooth and fast with a low current draw.

On the old motor with old controller check the hall wires and all connections very close for a loose contact.

Good luck.

 

[d8veh]

Sometimes the connection sequence in the controller does not match the colours of the wires. The wrong sequence will get the noise you describe. when you returned the motor to the previously good bike, did you put the wires back in the same sequence, or did you just match the colours? Try different sequences, but don't use a lot of throttle until you get it right.

 

[besseruud]

no, it's probably unfortunately completely excluded that it may be wrong colors that are the fault. I put the engine back on the bike that worked. after I had tried to used the same colors as before, but it seemed sadly not.

Icewrench: no. It is the original controller that came with the engine. and exactly the same controller that I have on both bikes

its a kit like this : http://www.ebay.com/itm/R-48V-1000W-Ebike-26-Electric-Scooter-48V20AH-LiFePO4-Battery-Charger-7-8-Week-/130584253709?pt=LH_DefaultDomain_15&hash=item1e676d950d

 

[Icewrench]

If the fets in the controller are damaged or the phase windings are shorted the motor will be hard to turn by hand. If the motor turns easy then those are o k.
Check the hall sensors for switching voltage as the wheel is rotated. Also look at the connectors for the hall wires, make sure the pins actually make contact when the connector is plugged in.

Good luck

 

[besseruud]

yes I forgot to mention that the engine sometimes heavy to drag around. but not all the time

 

[dogman dan]

That's the tell of a shorted phase. Nicked wire at the hub would be the other likely place to short out. Especially if it's intermittent.

Continue your learning curve at this level, before you sink your years budget into a 50 mph ride. The first investment should be a motor controller throttle tester. It'll be the best $$ you ever spent on ebike stuff after the voltmeter.