Brushless Motor Commutation using cRIO 9076

I need some help as I trying to find a way to do motor commutation.
I am developing a closed loop control system that consists of an applimotion motor (UTH-100-A-25-A-x-000) and AMC Digital Drive (DPRALTE-020B080) on CompactRIO 9076 FPGA Real Time Controller. The motor does not have hall sensors. Any suggestion on how to do motor commutation using this FPGA device is appreciated.
Thanks

How difficult it will be will depend on how complex those interfaces are.
If the encoder interface is simple, for example a clock and data pin that returns only the position, then writing the code to talk to it will be pretty straight forward.
Some absolute encoders use very complex protocols. I can't tell you exactly how hard it will be because I don't know this encoder.
I would expect that writing the analog position feedback to the drive will be easier but I don't know exactly what the drive is expecting either. You wrote earlier that the drive manufacturer told you specifically that the drive would work with analog position feedback and no hall sensors. I don't see how that would de done from the datasheet. You need to be sure that this is true because otherwise this approach will be impossible.
You should start by tackling just the encoder half of the problem. Hook up the encoder to your DIO module and start trying to query it. I hope you have more information about its interface than what is found in the datasheet- otherwise you would either need to contact the manufacturer or do some experimentation.
Give it a try and if you run into specific obstacles then we can help you with those.
BTW- The easier solution is to throw money at the problem and buy motors, encoders, and drives that are compatible with each other. For example, NI sells motors and cRIO modules that can drive them, including brushless. At that point the software is just opening an example and adding your own position setpoints.

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2.jpg ‏71 KB
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1)when signal 1 condition is true DI0 and DI1 should be true and false respectively so that motor rotates clockwise if the condition is false no movement that is DIo and DI1 should be 0 and 0
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case structure.JPG ‏43 KB
case structure.JPG ‏43 KB

sir its working now
Regarding oscilation
i am acquiring two signals at a rate of 1800 samples per second i.e signal 1 and signal 2, i am caluclating RMS for both the signals for every 1800 sample length ,when signal 1 RMS value is greater than threshold it should give 1 and 0 for DI0 and DI1 same thing for signal 2 but 0 and 1 for DI0 and DI1.both cases true not possible as i mentioned earlier.
the problem is if RMS is constant and satisfies the condition the motor rotates perfectly without disturbance but my RMS value keeps changing as i am acquiring the signal continuously and the signal also has a no constant amplitude . that time my motor just rotates with disturbance.
(how can i terminate the single case execution which you have mentioned earlier)
Attachments:
code.JPG ‏71 KB

Labview brushless motors

I'm developping a system with brushless motors. I'd like to know where I can find libraries with function for this control? Do you know some company that sell these motors and they have a good performance with Labview?

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As far as companies that sell brushless motors. I don't have any opinions. Maybe other in the forum will.

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Brushless Motor Commutation using cRIO 9076

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