Hi guys,
I'm at a junction in the 'pimp my Chinese eBike' project where I need to upgrade my battery having purchased a 2kw 48v 4300RPM motor to replace my 1200w 48v motor, and I naively replaced the 30A controller with a 48v/60v 33A-35A, not checking that to get proper @ 2kw you need 45A @ 48V which the motor is rated for.
Therefore I'm thinking, OK I should have got a 45A controller for my motor, If I wanted to run full 2kw on this motor @ 48V!
Either way the current battery is 48v 30A 20AH, and is being killed quick and needs replacing ASAP.
So do I correct my error and buy a 45A controller and a 48v 40AH battery or do I over volt to 60V with 25AH battery, thus still pushing 2kw 60V x 35A = 2100w and from a calculator I found takes the standard 48v RPM from 4300 - 5325 and although my motor is VEVOR , the controller is KUNRAY and the KUNRAY MY1020 60v 4300RPM motors are rated max 5300RPM.
So I'm thinking hmm, looks like these 48v motors (the photos of the VEVOR & KUNRAY look identical) will run happily on any volts as long as amps doesn't exceed 45 and watts @ 2kw before over heating.
So as my controller has a mode wire that switches it from 48v to 60v, do I.
1. Overvolt motor to 60v @ 33A-35A and buy a 60v 25AH battery.
or
2. Swap controller to a 48v 45A+ and buy a 48v 40AH battery.
The controller is also rated 2kw , so either way it's roughly 2kw!
Note: battery AH, are picked based on potential manufacturer and their dimensions of what would fit in the bike!
My goal is greater torque / acceleration not top speed, but also additional range at a controlled pace.
I appreciate all input.
Thanks,
Craig.
I'm at a junction in the 'pimp my Chinese eBike' project where I need to upgrade my battery having purchased a 2kw 48v 4300RPM motor to replace my 1200w 48v motor, and I naively replaced the 30A controller with a 48v/60v 33A-35A, not checking that to get proper @ 2kw you need 45A @ 48V which the motor is rated for.
Therefore I'm thinking, OK I should have got a 45A controller for my motor, If I wanted to run full 2kw on this motor @ 48V!
Either way the current battery is 48v 30A 20AH, and is being killed quick and needs replacing ASAP.
So do I correct my error and buy a 45A controller and a 48v 40AH battery or do I over volt to 60V with 25AH battery, thus still pushing 2kw 60V x 35A = 2100w and from a calculator I found takes the standard 48v RPM from 4300 - 5325 and although my motor is VEVOR , the controller is KUNRAY and the KUNRAY MY1020 60v 4300RPM motors are rated max 5300RPM.
So I'm thinking hmm, looks like these 48v motors (the photos of the VEVOR & KUNRAY look identical) will run happily on any volts as long as amps doesn't exceed 45 and watts @ 2kw before over heating.
So as my controller has a mode wire that switches it from 48v to 60v, do I.
1. Overvolt motor to 60v @ 33A-35A and buy a 60v 25AH battery.
or
2. Swap controller to a 48v 45A+ and buy a 48v 40AH battery.
The controller is also rated 2kw , so either way it's roughly 2kw!
Note: battery AH, are picked based on potential manufacturer and their dimensions of what would fit in the bike!
My goal is greater torque / acceleration not top speed, but also additional range at a controlled pace.
I appreciate all input.
Thanks,
Craig.