motor speed

[krithika]

I am new to LABVIEW, but for my research i need to develop a Data acquistion system. Hence i need a closed loop system. An analog output to control the speed of the motor. Also i need a feedback from the motor to see what happens when a load is applied to it for different speeds.

I have Labview 5.1 in my lab. Also for the hardware i have E-series DAQ.

PLS HELP !!!!!

Krithika

[MSS]

please tell that how you are controlling the speed of the motor? if it is PWM method you can use digital i/o feature in E- series board an feed back from the speed sensor can be connected to the analog input or digital inputdepends on the type of sensor.
hope this is use full to you, for any specific assistance do mail to me.

[DJ_L.]

In response to: "I am new to LABVIEW, but for my research i need to develop a Data acquistion system. Hence i need a closed loop system. An analog output to control the speed of the motor. Also i need a feedback from the motor to see what happens when a load is applied to it for different speeds. I have Labview 5.1 in my lab. Also for the hardware i have E-series DAQ. PLS HELP !!!!!
Krithika"

Hey Krithika,
There are a couple of ideas that I can suggest. First, you can check out all of National Instruments motion solutions found at the following Motion link. Along with this motion website, you can check out the Build Your Own Motion Control System page, which can help you if you decide to build an actual motion control system. The next solution that I can suggest, especially if you are going to be using a DAQ board as your motion solution, is the NI SoftMotion Module for LabVIEW. Check out the following link NI SoftMotion: Create Your Custom Motion Controller on Any Platform with LabVIEW which explains what SoftMotion is and how it can be used.
Last, you can find great motion resources on the following page: Motion Control Resources. Search through these documents and hopefully you'll be able to find more specific answers to all of your motion questions. I hope this helps. Please let me know if you have any further questions. Thanks, and have a great day.

Regards,
DJ
Applications Engineer
National Instruments

[krithika]

Hi

I recently upgraded my system to LABVIEW 7.0 and i have RT series Traditional DAQ system: PCI 7030/6040E series.

For my application I want to develop a closed loop DC motor control.

The input to the motor should be a sine wave, I should be able to control the frequency of the sine wave.

Can any one help me with this??!!??

Thanks

Best
Krithika

[S_Kanchap]

Hello Krithika,

1. To control the speed of motor you need to use Drive if motor is 3ph ac then ac drive or if the motor is dc then dc drive.But there is one confusion like you have dc motor but the input of motor is sine wave and you want to control frequency of sine wave. I think you have ac motor and by using ac drive you can change the freq of supply and control the speed of motor, in ac motor speed is 120f/p ... f- freq and p-poles.

2. In then drive there is always one analog input may be 0-10vdc or 4-20ma then you can give this signal from your daq card. you can start/stop the drive with daq dio also.

I hope it will help you