Norwegian54
10 mW
- Joined
- May 24, 2021
- Messages
- 26
Hello folks.
How are you all?
I am having a serious problem here. One that could potentially be REALLY dangerous if not corrected.
I have a rear hub motor kit from CSC.
Its a 48v 1500W motor, a KT48ZWSRKT-SJT02L controller, PAS and throttle and a KT LCD8H display.
Completed with two 52v, 20ah batteries in parallel.
The menu in the display are the way it was delivered from CSC. No changes made except top speed.
Now for the problem:
Some times, when I start riding, or continues to either pedal or twist the throttle after idling, the motor starts pulling for a second, then power "skips" for about half a second to continue pulling as if nothing happend.
It has been like this since I got it, but a couple of days ago it almost ended with disaster.
I was riding along at about 50km/h when I let go of the throttle to slow down a little.
At about 40km/h I started pedalling slowly and then the "skip" happend again. This time it locked up the rear wheel completely for half a second and that resulted in the wheel axle destroying the rear gear shift totally and ripping completely loose from it's place.
It seems like the rear wheel tried to turn the wrong way for a second.
Good thing this didn't happen in dense traffic.
I have had the skipping problem ever since I got the kit, but never this badly.
And the skipping doesn't happen all the time.. Let's say about 10% of the time I pedal of use the throttle from idling.
I have replaced the controller with a identical new one but it didn't change anything.
Yesterday I had a look inside the rear hub but cant find anything wrong. Apart from the wheel being wobbly after the accident.
I checked the hall sensors, but they seems to be working ok too.
Measured the power in to the motor with the rear wheel in the air, and the power to the motor drops when the skipping happens.
But not the power to the hall sensors.
All cable connections checked and are ok.
I really need som help here guys.
Don't like the idea of ending up as another number on a statistic..
Anyone had something like this happen? And what can I do about it. I'm completely out of ideas here.
How are you all?
I am having a serious problem here. One that could potentially be REALLY dangerous if not corrected.
I have a rear hub motor kit from CSC.
Its a 48v 1500W motor, a KT48ZWSRKT-SJT02L controller, PAS and throttle and a KT LCD8H display.
Completed with two 52v, 20ah batteries in parallel.
The menu in the display are the way it was delivered from CSC. No changes made except top speed.
Now for the problem:
Some times, when I start riding, or continues to either pedal or twist the throttle after idling, the motor starts pulling for a second, then power "skips" for about half a second to continue pulling as if nothing happend.
It has been like this since I got it, but a couple of days ago it almost ended with disaster.
I was riding along at about 50km/h when I let go of the throttle to slow down a little.
At about 40km/h I started pedalling slowly and then the "skip" happend again. This time it locked up the rear wheel completely for half a second and that resulted in the wheel axle destroying the rear gear shift totally and ripping completely loose from it's place.
It seems like the rear wheel tried to turn the wrong way for a second.
Good thing this didn't happen in dense traffic.
I have had the skipping problem ever since I got the kit, but never this badly.
And the skipping doesn't happen all the time.. Let's say about 10% of the time I pedal of use the throttle from idling.
I have replaced the controller with a identical new one but it didn't change anything.
Yesterday I had a look inside the rear hub but cant find anything wrong. Apart from the wheel being wobbly after the accident.
I checked the hall sensors, but they seems to be working ok too.
Measured the power in to the motor with the rear wheel in the air, and the power to the motor drops when the skipping happens.
But not the power to the hall sensors.
All cable connections checked and are ok.
I really need som help here guys.
Don't like the idea of ending up as another number on a statistic..
Anyone had something like this happen? And what can I do about it. I'm completely out of ideas here.