Controlling Cheetah 21.5T Sensored BLDC Motor with PIC18F2431

[Cantafford]

I have **broken link removed** BLDC(without the ESC) and I want to control it with a PIC18F2431 using my own code.
I made an inverter bridge out of 2 L293D drivers and simulated the application(worked well in simulation). Like this:

Here are the motor specifications(I have the 21.5T):

I suppose 12V would be fine for running this motor at close to top RPM.

However I have a question regarding the sensors:

For my code I'm using the binary information from 3 hall sensors. The BLDC motor has a jack labeled "Sensors" but on that jack there are 6 pins instead of 3. I'm guessing the motor has only 3 sensors and not 6. Or maybe it has 3 but each sensor outputs 2 signals. I could not find that information anywhere. I searched for a datasheet of the motor but to no avail. All I find is some documentation on it's ESC but that's it.

So my question is: has anyone ever tried controlling such a motor(6 pins from sensors output) with a microcontroller. And if so how are the pins usually arranged?

And is there any way to find out which pins represent the output of the sensors without using an oscilloscope?

 

[Pommie]

The motor I have has 5 pins, power, ground and 3 outputs. I can't think of a combination that would use 6. If you work it out or find the information elsewhere, please update here to feed my curiosity.

Mike.

 

[Cantafford]

The motor I have has 5 pins, power, ground and 3 outputs. I can't think of a combination that would use 6. If you work it out or find the information elsewhere, please update here to feed my curiosity.

Mike.

Ok.

 

[Ian Rogers]

If the wires are just for the three sensors, it would suggest separate grounds / power to the sensors..

 

[Cantafford]

If the wires are just for the three sensors, it would suggest separate grounds / power to the sensors..

So would it be possible that the 6 pins are the 3 sensors output and the other 3 are the pins VCC(+) while the sensors ground would be internally tied to the motor's?

 

[Ian Rogers]

No Idea.... Just second guessing....... You'll need to test the outputs...Or find the datasheet

 

[Cantafford]

The motor I have has 5 pins, power, ground and 3 outputs. I can't think of a combination that would use 6. If you work it out or find the information elsewhere, please update here to feed my curiosity.

Mike.

I will open the BLDC today and see if I can find what each pin is and will let you know what I find.

 

[Cantafford]

The motor I have has 5 pins, power, ground and 3 outputs. I can't think of a combination that would use 6. If you work it out or find the information elsewhere, please update here to feed my curiosity.

Mike.

Pins are:
1- GND
2,3,4 - OUTS
6- VDD
5- No ideea

 

[Ian Rogers]

I wonder if 5 is overload current protection..

 

[Pommie]

Another suggestion for pin 5 is a temperature sensor output.

Mike.