Hi,
This is my first post here. I'm currently making an electric moped. Sadly I've encountered some problems. Hopefully some insightful people can give me advice.
The setup I'm using is as follows:
One 60v (17S) 41ah battery with a 100A fuse. It is connected to a Kelly KEB72451UX controller. These are built into an Benda scooter (better known as the Ebretti 518) . The bike is still using the stock motor, but with a thermistor added. I'm planning on adding Ferrofluid in the near future.
The main issue:
In the settings of the Kelly Controller you can set two limits. Max battery current and Max motor current. The battery current setting can be changed from 20-70%. This setting is supposed to keep battery amps low, but is does absolutely nothing. I've done multiple runs back to back while changing this setting. (Of course I've reset the controller in between runs) The power of the bike remains the same. Meanwhile the the Max motor current setting does work. I can't set it any higher than 40% or else the fuse in the battery pops at higher speeds. The motor current setting can be set from 30-100%.
While accelerating from a standstill the acceleration remains constant up to near top-speed using the 40% setting. This means power increases with speed. This also means I'm leaving some power at lower speeds. The controller is supposed to deliver high motor current while starting and gradually decrease motor current as motor speed (and thus voltage) rise as to not draw too much power from the battery. Regardless of the max battery current setting, my controller doesn't do this and always tries to deliver the set max motor current even while voltage is high. The controller uses too much power and trips the battery fuse.
This can't be right. The controller is supposed to limit battery current to the set maximum. Has anyone else experienced this before?
Kind regards,
Tummy
This is my first post here. I'm currently making an electric moped. Sadly I've encountered some problems. Hopefully some insightful people can give me advice.
The setup I'm using is as follows:
One 60v (17S) 41ah battery with a 100A fuse. It is connected to a Kelly KEB72451UX controller. These are built into an Benda scooter (better known as the Ebretti 518) . The bike is still using the stock motor, but with a thermistor added. I'm planning on adding Ferrofluid in the near future.
The main issue:
In the settings of the Kelly Controller you can set two limits. Max battery current and Max motor current. The battery current setting can be changed from 20-70%. This setting is supposed to keep battery amps low, but is does absolutely nothing. I've done multiple runs back to back while changing this setting. (Of course I've reset the controller in between runs) The power of the bike remains the same. Meanwhile the the Max motor current setting does work. I can't set it any higher than 40% or else the fuse in the battery pops at higher speeds. The motor current setting can be set from 30-100%.
While accelerating from a standstill the acceleration remains constant up to near top-speed using the 40% setting. This means power increases with speed. This also means I'm leaving some power at lower speeds. The controller is supposed to deliver high motor current while starting and gradually decrease motor current as motor speed (and thus voltage) rise as to not draw too much power from the battery. Regardless of the max battery current setting, my controller doesn't do this and always tries to deliver the set max motor current even while voltage is high. The controller uses too much power and trips the battery fuse.
This can't be right. The controller is supposed to limit battery current to the set maximum. Has anyone else experienced this before?
Kind regards,
Tummy