I tried this with my Ebike BLDC Hub motor but the problem is, its producing power only when the wheel is rotated in anticlockwise direction. it does not produce power when it is rotated clock wise..
Why is this..? In normal dc motor it produces power in both directions but it doesn't happen so in my BLDC.
@sathishrahul121 Assuming its a standard 3 phase sensored BLDC, it should be stunningly obvious. There will be a total of 8 wires coming out of the hub. 5 of those should be tiny, for the hall sensors to indicate position. The remaining 3 large wires carry power to the motor. You can make a 3 phase rectifier if you wanted to exclusively use it to generate power, or just use any two phases.
Does this actually produce up to 1KW? If so how much does it weigh(if you don't mind me asking?)
I'm building a Hybrid UAV, so we need to generate 4KW of energy and car alternators are just too heavy, If you're running 3 phases we can just stick some rectifiers on and have a control circuit for DC
@alexlovett1991 It's BLDC hub motor for a bicycle. It's rated at 1000W and 48V, but I run it at 8000W and 100V. It's peak continuous power is about 2kW, and it takes about 40 MPH of airflow with big holes in the side covers to cool it at that power. It will regenerate power at the same efficiency as it outputs it, so yes it will put out 1kW with ease with the right setup. My bike regens about 2kW peak at 40 MPH. It's limited to 15-20A on the controller.
Thank you for your posting. I want to made a wind mill using this kind of hub motor like generator. I saw that has 3 phases and I wonder if I can use it directly or I need some kind of controller for have the output need for charging a battery.
If I cannot use it without controller, what kind of controller should I buy for a 1000w/48v?
Cool! I just ordered a NC25A-12v charge controller (0-60v input, 25A continuous), bridge rectifier, and turnigy power meter to keep an eye on everything. :)
This is great, thanks for the video. I just ordered one of these. Have you tried hooking it up to a DC load? I'm very curious to see what kind of 12v watts are possible. Whats the max rated rpm for this motor?
@jonandesign My controller has regenerative braking, which essentially is the ultimate in using the motor as a generator. Slowing down from 40+ is quite hard on the brakes, so its nice to have a essentially electric brake thats consistent, reliable, never wears. I can get about 1KW or more into the battery at 40MPH. In this video, I was just using two phases, but it would be VERY capable of running hundreds of watts. Just hook up a full wave rectifier and a cap. It will be >>12VDC, however.
I tried this with my Ebike BLDC Hub motor but the problem is, its producing power only when the wheel is rotated in anticlockwise direction. it does not produce power when it is rotated clock wise..
Why is this..? In normal dc motor it produces power in both directions but it doesn't happen so in my BLDC.
Thanks anyhow your video was cool!!
worldstarer 1 month ago
@ericspda Thanks a lot!! It was more than helpful... Keep posting great videos like this!!
sathishrahul121 1 month ago
Really interesting!! But i have one question for u!
There are several wires coming out of the BLDC motor, Can u please give me an idea for finding out the phase wires. Thank you!!!
sathishrahul121 1 month ago
@sathishrahul121 Assuming its a standard 3 phase sensored BLDC, it should be stunningly obvious. There will be a total of 8 wires coming out of the hub. 5 of those should be tiny, for the hall sensors to indicate position. The remaining 3 large wires carry power to the motor. You can make a 3 phase rectifier if you wanted to exclusively use it to generate power, or just use any two phases.
ericspda 1 month ago
Does this actually produce up to 1KW? If so how much does it weigh(if you don't mind me asking?)
I'm building a Hybrid UAV, so we need to generate 4KW of energy and car alternators are just too heavy, If you're running 3 phases we can just stick some rectifiers on and have a control circuit for DC
alexlovett1991 1 month ago
@alexlovett1991 It's BLDC hub motor for a bicycle. It's rated at 1000W and 48V, but I run it at 8000W and 100V. It's peak continuous power is about 2kW, and it takes about 40 MPH of airflow with big holes in the side covers to cool it at that power. It will regenerate power at the same efficiency as it outputs it, so yes it will put out 1kW with ease with the right setup. My bike regens about 2kW peak at 40 MPH. It's limited to 15-20A on the controller.
ericspda 1 month ago
Hi,
Thank you for your posting. I want to made a wind mill using this kind of hub motor like generator. I saw that has 3 phases and I wonder if I can use it directly or I need some kind of controller for have the output need for charging a battery.
If I cannot use it without controller, what kind of controller should I buy for a 1000w/48v?
Thank you.
cipm66 7 months ago
Cool! I just ordered a NC25A-12v charge controller (0-60v input, 25A continuous), bridge rectifier, and turnigy power meter to keep an eye on everything. :)
jonandesign 7 months ago
This is great, thanks for the video. I just ordered one of these. Have you tried hooking it up to a DC load? I'm very curious to see what kind of 12v watts are possible. Whats the max rated rpm for this motor?
jonandesign 8 months ago
@jonandesign My controller has regenerative braking, which essentially is the ultimate in using the motor as a generator. Slowing down from 40+ is quite hard on the brakes, so its nice to have a essentially electric brake thats consistent, reliable, never wears. I can get about 1KW or more into the battery at 40MPH. In this video, I was just using two phases, but it would be VERY capable of running hundreds of watts. Just hook up a full wave rectifier and a cap. It will be >>12VDC, however.
ericspda 8 months ago