Help identifying parts, please

Jacob Waller

Just Joined
Aug 8, 2012
2
0
Hi!
I'm a new e-bike fan who have just managed to gather some e-bike parts, but now I need your help going forward. Firstly, I've got at Bafang 8FUN motorized wheel with some kind of 8-pin connector. However, I haven't got the corresponding plug and cable, and since I don't know what it's called I haven't been able to find it anywhere. Maybe you experts can guide me, or you might even have one spare? It looks like this:

View attachment 4060
https://www.dropbox.com/s/am4sj02oe4ukuxf/kontakt.jpg

The motor I have is the Bafang 8FUN SWXB36V250W175R. Would the following controller work with that?
KU65 250W 6Mosfets Controller With LED Panel - BMSBATTERY

Also, would I have to connect a PAS and brake grips to make it work, or could it be driven with just a thumb throttle? I guess the latter makes it a moped, for which you need permission, and not a bike, but I'm curious to whether it would work?

Thanks in advance for you help!
/Jacob
 

NRG

Esteemed Pedelecer
Oct 6, 2009
2,592
10
It will work without the PAS or brake cutouts. 8 pins means a sensored motor, I'd switch to a sensor less controller, cut the sensor wires off and just use a new three pin connector for the 3 motor phase wires like this one:

Waterproof connector - 3 pin UK SELLER PACK OF 2 | eBay
 

Jacob Waller

Just Joined
Aug 8, 2012
2
0
Thanks for sharing your expertise!
So you can just cut off the sensor wires and the motor will work anyway? What are they for then? Are they just to enable the PAS and limit the speed, or what are the upsides or downsides of cutting them off?

Do you think that the mentioned controller could still work if you do that? They present it as "this controller is compatible with sensorless motor and hall sensor motor." –*is that possible? I'm asking since I might be able to get one from a friend.

Cheers
 

NRG

Esteemed Pedelecer
Oct 6, 2009
2,592
10
You need a 'sensor-less' capable controller to be able to do this. The sensors (hall effect) are used for position and motion detection of the motor to ensure the motor starts and rotates in the right direction. Unfortunately they add an area of unreliability, if theres a bad connection or one fails the motor wont turn.

Going sensor-less eliminates this possibility, the controller uses the motor phase windings instead to detect rotation...the only minor downside is the motor can growl/chirp/hiccup a bit when first setting off but its really a none issue and it will be a bit more reliable longterm.

Yes that controller is a sensor-less version.
 
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