Brushless wiring combinations

[carbon.nanotube.capacitor]

I'm trying to write down all the different combinations of wiring a brushless motor and controller. I'm getting myself confused because writing down every combination is well, confusing. There are three wires, blue, green and yellow from both the controller and the motor. I think that there are 9 total combinations of these 6 wires. However there are another 6 wires for the hall signals which have 9 combinations; does this mean that all together there are 9 x 9 = 81 combinations? Any help would be greatly appreciated. I've got a motor that I can only make go backwards so far.

 

[fechter]

Check out this thread:
http://endless-sphere.com/forums/viewtopic.php?f=16&t=3484

 

[John in CR]

I believe the most you ever need to try is 12. Change only the 3 halls with phases the same (or vice versa). With the 6 combos of the 3 you will get either the correct one or the correct one for reverse. If reverse, then swap 2 phases and try the 6 hall combos again. Be careful of false positives. The correct one will be the quietest and smoothest, especially at low speed.

John

 

[Knuckles]

Use this blank xls spreadsheet ... http://endless-sphere.com/forums/download/file.php?id=11560

You may also want to try all 36 combinations ...
This example is with the Infineon controller and a direct drive BLDC motor ...
http://98.131.176.65/endless-sphere/Phase-Hall-Wire-Combinations.xls

 

[carbon.nanotube.capacitor]

Thanks John and Fechter and Knuckles. That thread helps a lot. And it now makes sense that the number of possible combinations would be 36. I'll try to get the motor to go forward with John's suggestion. Maybe I'll write down all the combinations of halls that I've tried for each combination of phase wires.

 

[John in CR]

12 is my patience limit, so I don't have to write anything down. Be tender on the throttle while trying. I got impatient with a Bafang and a powerful Infineon controller, and smoked the motor, which blew the controller, when I hit the throttle too hard for a few seconds out of frustration.

John

 

[carbon.nanotube.capacitor]

Fortunately I don't have to worry about over-amping because I'm using a small 48v 1.5 amp SLA charger as a power supply. It's a switch-mode charger that simply wont put out more than 1.5 amps - when I use it on a working set up and hit full throttle, the motor cuts out because I'm demanding more current than the charger likes and so it cuts power momentarily. So to reach full speed the throttle has to be used more gradually. Anyway, poor man's test power supply.