Which controller to use for 350W Hub motor

[LocoCity1991]

Hi everyone,
sry in advance if I post this in the wrong topic; Im new here =)

Currently I wonder what controller to use for my no name 350W geared hub motor.
I have two options:

1. A Kuteng KT36/48ZWSR-NSK23XL Controller Rated at 8A with a max of 17A

2. A Kuteng KT36ZWSR-SXF23X Controller Rated at 7A with a max of 15A

Currently I use the 2 option in my bike. Works fine so far, but I wonder, if the other, stronger controller would be better in regards of performance and general motor health. Also I already fried on of the KT36ZWSR-SXF23X controller. Probabbly due to too much current or sth. like that.

Actually I´d like to keep the weaker controller since its smaller and I can mount it in a different spot of my bike where the stronger, bigger controller would not fit.

Any insights into this topic?

Best regards

 

[docw009]

I find using the 36/48 more versatile since I have both types of batteries. Having more current is good too. It depends on your display but the more featured models allow you to restrict the max current for PAS, and the setting does work.

 

[anddan]

Hi, the higher amperage controller could damage the motor connections or mosfets (which you mentioned), it could also cause the motor windings to overheat,

Power that you input into the motor is battery current (controller current rating) times the voltage. A percentage of that is converted into output power and a certain amount into losses that cause the motor to overheat, the amount of power lost is what determines what power you can put into the motor -

https://ebikes.ca/learn/hub-motors.html
https://ebikes.ca/tools/simulator.html

https://ebikes.ca/tools/simulator.html?motor=MG310_FST This is a motor similar to your size, the efficiency curve tells you if you will overheat the motor, hopefully theirs your exact motor in the simulator and you can find complete information on it.

Andrew