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MCU product selection guidance

Prodigy 70 points

Replies: 13

Views: 1640

I need an MCU that can control 2 asynchronous 230V 3pase 0.16kW motors separately through IGBT devices. supply for the IGBT devices is 320VDC

I need to keep both motors at the same RPM  I can use a hall effect device on each shaft and use the pules as a feedback unless TI has a better solution.

I am new to TI instaspin and their MCU's so looking for part number as a starting point.

Also are there in development kits that can do this

Many thanks

13 Replies

  • there are dual motor control examples on several of our MCUs, from TMS320F28035 up to TMS320F28379D

    for hardware examples you can use
    InstaSPIN-FOC (sensorless) or InstaSPIN-MOTION (encoder) using
    LAUNCHXL-F28069M
    and either BOOSTXL-DRV8301 or BOOSTXL-DRV8305EVM

    this would use TMS320F28069M on the Launchpad and you use MotorWare for software projects
  • In reply to ChrisClearman:

    Are there development kits that work with 230VAC 3 phase asynchronous motors, preferably IGBT.
    The 2 motors are going to be used to drive a vibration plate.
    If the RPM is not the same for both motors you end up with a wave effect in the vibration.
  • In reply to Nick Price74:

    TMDSHVMTRINSPIN is a high voltage kit. This is a single inverter though.

  • In reply to ChrisClearman:

    I have ordered the kit.

    if I need to have both motors running at exactly the same speed but separately driven which is the best instaspin-foc or instaspin-motion
  • In reply to Nick Price74:

    InstaSPIN-FOC is sensorless
    InstaSPIN-MOTION is primarily encoder based sensor (it can do sensorless)

    at normal to high speeds our sensorless observer is within a few counts of a standard encoder.
    at lower speeds an encoder will typically give better velocity resolution, but there are challenges in low speed control as well, depending on the resolution of the sensor
  • In reply to ChrisClearman:

    I was looking to use a hall effect devices on each motor 1 shaft revolution gives 1 pulse from the hall effect
    motors will be driven up to 3000 RPM
    the cost of the hall device is about $3 so no problem there, the most important thing in all of this is that I get no wave effect in the vibration which I will get if the motors are turning at even slightly different RPM
    if the accuracy can be obtained without sensors all the better.

    If not its finding an MCU that can take in the pulses from both motors and adjust the speed of one to match the other, a master slave config
  • In reply to Nick Price74:

    sensorless will be more accurate than your hall approach

    using InstaSPIN-MOTION for sensorless will let you tune the speed controller much better and simpler. Doesn't seem like you are limited by a little extra cost so I would go that direction.
  • In reply to ChrisClearman:

    ok thanks

    does the kit come with a circuit diagram, and does it have power factor correction?
  • In reply to Nick Price74:

    there is no PFC

    for the BOOST, click on the links in my first post
    for the Launchpad these are housed in www.ti.com/tool/controlsuite

    for the InstaSPIN development you will also need MotorWare and www.ti.com/tool/ccstudio
  • In reply to ChrisClearman:

    hi

    If this is in the wrong forum please let me know which forum I should use.

    I received TMDSHVMTRINSPIN-High Voltage Motor Control Kit today.

    When I try to access it via the GUI I get the error message

    Unable to connect to the selected target, please verify that the target is available and ready to receive connections.

    Any suggestions please

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