• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Subscribers 64 subscribers
  • Views 1189 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

10V to 24V power boast converter.

Justin Kanarick
Prodigy 45 points

Hello, I am looking to design a control system to automate a material testing rig (see below).

...A motor will be attached to the screw on the right side of the machine, and turn to fatigue the sample placed on the left. I am looking to power this system using a 24 V DC motor (see below). The system will be controlled using National Instruments Lab view software and an output module ( NI9263 - that supplies 10 V (@1 mA).

Link to power module: http://sine.ni.com/nips/cds/view/p/lang/en/nid/208806

Link to motor spec: http://www.parttarget.com/3010-01-056-9045_3010010569045_5A3128.html/-9F8AB34A-C927-4B8B-AB52-88B498E975AB

The output module provides power at only 10 V and I am looking for a system that can boast that to 24 V. I ultimately will create a program using a PWM signal that can modulate the speed of the motor, but am having trouble deciding how to get  24 V out of the 10 V module.

Is there a kit that can be purchased for this project, or a circuit I can create to get 24 V in order to operate the motor.

  • 0
    TI__Guru**** 191445 points

    I think you are taking the wrong approach.  The NI module is really more of a DAC.  It only has 1 mA output and is meant as a control voltage.  The motor requires 220 mA at mo load condition.  I'm sure more will be required under load.

  • 0 in reply to JohnTucker
    Prodigy 45 points

    I absolutely agree with your point. I am doing research for a professor who has asked me to use his DAC module to control the motor. Looking on the NI website I have found modules like the NI 9505 (see below)

    Brushed DC Servo Drive:  http://sine.ni.com/nips/cds/view/p/lang/en/nid/202711

    Which seem to be designed for such an application, but not compatible with the DAC system he has. Is there any way to design  an outside circuit- taking the initial 10 V pulse as an input -- and output a 24 V pulse with a greater current?

  • 0 in reply to Justin Kanarick
    Genius 3295 points

    It sounds to me like your professor wants to "control" the motor with the 10 V 1 ma DAC, not power it. The control voltage from the DAC sets the motors speed. It's used as a command voltage. You need a separate 24 V, 25 or 50 watt power supply to power the motor driver. You don't need a boost converter. You need two separate power sources -The low power one is for 10V DAC for speed or torque control and the other, the 24 V, is for the motor drive.

    The Brushed DC servo drive would work fine with the motor you have. In the data sheet they show a -5V to +5V index voltage. That's an analog input voltage you use to set the motor torque and direction. I am guessing the negative voltage is for reverse direction. If you only need one direction, use 0 to +5V.

     Maybe you could offset the output of the 10V DAC so that it outputs from -5V to 5V?

    Hope this helps,

    Chuck Sampson

  • 0 in reply to Chuck Sampson
    TI__Guru**** 191445 points

    Chuck,

    I think you are on the right path.  And actually, that controller will output up to +/- 10 V so it should work perfectly.

  • 0 in reply to JohnTucker
    Prodigy 45 points

    I apologize for any confusion, but I can not use the DC servo drive module (NI9505). I may be a bit confused myself, but could you give me an example (link to) a servo drive - as you mentioned before - that could be used for the application. 

    If i understand correctly, I can purchase the drive, and supply it with 24V from an external power supply..then my current DAQ module (the one that puts out a signal at 10 V @ 1ma: NI9263) can modulate the rotation of the motor?

    link to NI9263 module:  http://sine.ni.com/nips/cds/view/p/lang/en/nid/208806

    Thank you all for your help, as you may see I am quite unfamiliar with hardware!

  • 0 in reply to Justin Kanarick
    TI__Guru**** 191445 points

    Unfortunately, this is moving out of the scope of this forum.  We can help you with specific questions about TI dc/dc converters, or general questions about which converters are applicable to your application.  We are not too familiar with any of those NI products.  You might ask their technical support.   I suggest you discuss this with your professor to see what he has in mind and proceed accordingly.  If you have additional questions about TI devices, please feel free to post.  We'll be glad to help.