I Have the Bafang 250-watt motor rear hub with KT controller 36v/48v 20Amp and it works much better than the stock Luishi controller which was a 36v controller it has now more torque more speed overall better control in PAS 5'm getting between 430watt till 475watt so I'm guessing I'm ok with this controller definitely more power
Bafang Rear Hub Motor Questions
- Thread starter robintb
- Start date
I use two different types 36v 21ah and 48v 21ah that's the beauty of a dual controller.
Maximum continuous rated wattage of motor of course, not battery delivered wattage, controller delivered wattage or actual peak power capability at the wheel after efficiency losses.
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I was expecting peak input Watts from the description? The motor is a Bafang rated 250W continuous output according to the post.
I was replying to your post which didn't quote what he posted. Now I've looked back at that I can see what you mean.
That same 34% total efficiency loss I've experienced with 250 watt rated Bafang hub motors on two bikes I've owned.
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How much power that comes from the battery depends on how fast you're going. You only get the maximum allowed current when the motor is turning slowly. As the motor speeds up, the current goes down until it reaches zero at max RPM.
What would be the most powerful controller I could use with 48v 250w motor without having problems but would give me better torque or speed .
Depends on the motor's maximum speed, your weight and what sort of rides you do. It also depends on which motor you have. There are big powerful 250w motors and tiny weak ones.
Aha well it's a bafang motor and I'm 74 kg and I use to travel to work and so on and I live in the Netherlands which is mostly flat terrain.
It still depends on the motor's speed, you can run as much power as you like through a slow one, but if you have a fast one, you can get problems at relatively low power. Bafang Motors often have the speed code written on them.
20A seems a bit high for your needs. I'm 100kg and have very steep hills everywhere I ride, and I find 14A enough at 48v.
That's my question what would be the maximum power controller I could use with this motor without getting into any problems,at the moment I have 36v/48v 17a KT controller with LCD8 display
It’s a Bafang G062 with a 9 turn Winding. It’s rated at 250w, 500w, 750w and 1000w, depending upon which country you live in.
Here is the 2003 Bafang workbook with the specifications for all their motors.
Here is the 2003 Bafang workbook with the specifications for all their motors.
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