Closed Loop Speed Control of Induction Motor and PM Brushless DC motor

[Vaszzy]

I need to implement closed loop speed control of Induction motors, PM Brushless DC motors and several other cotrol algorithms using LabView. I require 6 PWM channels and 6 12 bit ADC channels and a motion control VI's. Ideally a DSP would do the trick but i would like to take advantage of the user friendly GUI of the LabView program to cut development time. PLease suggest the best hardware solution.

[Jochen]

Vaszzy,

I think for your requirements an FPGA-based system (cRIO or sbRIO for higher volumes) could be a good solution. For a start I would recommend to have a look at the following links. Please post again to this thread if you have specific questions. Please post also more detailed information about your project (e. g. types of trajectories, environmental aspects of the system, number of systems,...).

NI-Motion Control starting page

Kind regards,

Jochen Klier

National Instruments

[MarcoPolo5]

You should check out Ben_B's content on BLDC control:

https://forums.ni.com/t5/Example-Code/6-Phase-Trapezoidal-Control-for-Brushless-DC-Motors/ta-p/35083... 

[Vaszzy]

I have purchased a PCIe/PXI 7842R FPGA card and a SCB 68 board. I need to acquire the motor currents and hall signals as inputs and generate PWM signals as outputs to the power switches driving the motor. Can the SCB 68 be used for this purpose of outputing PWM as digital outputs and acquiring currents as analog inputs?

[Jochen · Accepted solution]

Vaszzy,

the SCB 68 is just a connector block for the 7842R and it does not provide any signal conditioning. You can use the RIO board's digital I/Os to generate PWM signals. The 7842R provides ADCs for voltage measurements. For current measurements you will need high precision shunt resistors to convert current to voltage.

Regards,

Jochen