How to ??? Sensor a Brushless Motor???

[benediktsamuel]

hey,

can somebody tell me how to sensor a Brushless outrunner and use it with these controller: http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&Item=200530104770&Category=34063&_trkparms=algo%3DLVI%26its%3DI%26otn%3D1 ??

my problem is, that i can find only some sensored brushless outrunners in the forum with 5 poles at the sensor wire

i think that this is the best way:
http://endless-sphere.com/forums/viewtopic.php?f=28&t=12768&start=60#p225084
thank you

Benedikt from Germany

P.s. sorry for my bad English

P.s.s sorry, i posted it in a wrong corner

 

[Jeremy Harris]

Hi Benedikt, welcome to ES. Your English is fine, and much better than my German!

The easy way to fit the sensors is just to glue them into the slots in the motor stator, one in every 4th slot, so they are at 120 degrees to each other. This works OK, and is the way that I've fitted them to several motors. I use SS411A Hall sensors, but the slightly cheaper SS41 will probably do as good a job.

There should be 5 wires coming from the Hall sensors. Each sensor has three wires (making 9 in all), but the +ve and -ve leads from each sensor can be connected together (making 3 signal wires plus one common +ve and one comm0n -ve).

Hope this helps.

Jeremy

 

[toglide]

Hi Benedikt, welcome to ES. Your English is fine, and much better than my German!

The easy way to fit the sensors is just to glue them into the slots in the motor stator, one in every 4th slot, so they are at 120 degrees to each other. This works OK, and is the way that I've fitted them to several motors.

Hope this helps.

Jeremy

Hi Jeremy

I have been doing a lot of reading on this subject and I found this post to be very help full. I have one more question if you don't mind.
So are you saying the halls can be mounted in ANY three slots just as long as they are 120 deg to each other? With 12 slots that would give you 4 possible positions.
So any one of the four possible 120 Deg. positions would work fine?

Thanks, Ron

 

[LOWRACER]

hey,

can somebody tell me how to sensor a Brushless outrunner and use it with these controller: http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&Item=200530104770&Category=34063&_trkparms=algo%3DLVI%26its%3DI%26otn%3D1 ??

my problem is, that i can find only some sensored brushless outrunners in the forum with 5 poles at the sensor wire

i think that this is the best way:
http://endless-sphere.com/forums/viewtopic.php?f=28&t=12768&start=60#p225084
thank you

Benedikt from Germany

P.s. sorry for my bad English

P.s.s sorry, i posted it in a wrong corner

Hello, I decide me to write in german....

Nun, das ist nicht so einfach. Du musst auf jeden Fall schauen wo die die einzelnen Phasen hingehen und nach
welchem Prinzip. Die meist verwendeten Sensoren sind Honeywell SS40, das ist ein digitaler Hallsensor.
Der Sensor in der mitte ist in den meisten Fällen um 180grad gedreht, dadurch bekommt er natürlich auch einen anderen
Wert!
Im Modellbau-Sector habe ich noch niemals einen Outrunner BLDC mit Sensoren gesehen, der Controller wird einfach nur
mit den 3 Phasen verbunden und fertig!

MfG, Chris

 

[benediktsamuel]

hey... kannst du mir das mit den 180° nochmal erklären??
thx bene

 

[Jeremy Harris]

Hi Jeremy

I have been doing a lot of reading on this subject and I found this post to be very help full. I have one more question if you don't mind.
So are you saying the halls can be mounted in ANY three slots just as long as they are 120 deg to each other? With 12 slots that would give you 4 possible positions.
So any one of the four possible 120 Deg. positions would work fine?

Thanks, Ron

Yes, any three slots at 120 deg will do, as it's the magnet position that's being sensed. The Hall position is always related to where the transition occurs from one polarity to the next in the rotor magnets, and as the magnets are all equally spaced you can pick any of the four possible positions around the stator.

Jeremy