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LAUNCHXL-F28069M: Use with Hall Effect Sensors

PHR
Prodigy 120 points
Part Number: LAUNCHXL-F28069M
Other Parts Discussed in Thread: DRV8305, , BOOSTXL-DRV8301, MOTORWARE, DRV8312, CONTROLSUITE, DRV8301

I am using the LAUNCHXL-F28069M with BOOSTXL-DRV8301 and DRV8305, and have the following questions pertaining to the use with Hall Effect sensors:

1. Is there a lab in motorware/controlSUITE that demonstrates the use of only Hall Effect sensors alone for control with the above boards?  I was referred to one for the DRV8312 kit, and Lab 11E works with my boards, but only for start-up.  Please advise with a lab #/example # using ONLY hall sensors with speeds of up to 5500 RPM for the eval board bundle I am using, if available.

2. In general, could one control a motor using this bundle kit, using only Hall Effect sensors, without any other sensor or sensorless assistance?  I noticed that even the lab/code example for the DRV8312 kit used sensorless along with the hall sensors if I am interpreting correctly.

3. Is there a limitation, besides the use of 5V, for the type of Hall Effect sensor that can be used with the bundle kit I am using?  For example; for the hall sensors, features like bipolar, latching, etc; is there anything required/incompatible in these regards?

4. I am also going to be driving a frameless motor, and will need to select and mount the Hall Effect sensors.  Is there a limitation on the number of them to use, position, and angle?  For example in many cases I see motors equipped with three sensors at 120deg apart.  Is there an advantage to using more, placed at 60deg angles, or other configurations?

  • 0
    TI__Genius 17370 points
    Hello,
    I am writing to let you know that a C2000 team member has been assigned to this post and should be answering shortly.

    Regards
    Baskaran
  • 0 in reply to Baskaran Chidambaram
    TI__Guru** 109730 points
    1. Is there a lab in motorware/controlSUITE that demonstrates the use of only Hall Effect sensors alone for control with the above boards? I was referred to one for the DRV8312 kit, and Lab 11E works with my boards, but only for start-up. Please advise with a lab #/example # using ONLY hall sensors with speeds of up to 5500 RPM for the eval board bundle I am using, if available.
    A: You can refer to the BLDC_sensored project for DRV8312kit or HVBLDC_sensored project for HVkit in TI controlSUITE, and add DRV8301 driver code as DRV8301 kit in controlSUITE also. Motor can run up to such high speed with only hall sensor on both two EVM if the motor rated speed is enough high, and the motor power is less than EVM capacity.

    2. In general, could one control a motor using this bundle kit, using only Hall Effect sensors, without any other sensor or sensorless assistance? I noticed that even the lab/code example for the DRV8312 kit used sensorless along with the hall sensors if I am interpreting correctly.
    A: As item 1. Motor can run with only hall sensor mode as BLDC_sensored project.

    3. Is there a limitation, besides the use of 5V, for the type of Hall Effect sensor that can be used with the bundle kit I am using? For example; for the hall sensors, features like bipolar, latching, etc; is there anything required/incompatible in these regards?
    A: Depend on hall sensor interface. The EVM can support most 5V hall sensor interface. You can refer to hall sensor interface spec.

    4. I am also going to be driving a frameless motor, and will need to select and mount the Hall Effect sensors. Is there a limitation on the number of them to use, position, and angle? For example in many cases I see motors equipped with three sensors at 120deg apart. Is there an advantage to using more, placed at 60deg angles, or other configurations?
    A: Most BLDC with hall sensor is 120 degree shift, you can use other hall sensor, like 30, 60 degree, but you need to change the control coder accord to hall sensor output signal.
  • 0 in reply to Yanming Luo
    Prodigy 120 points
    Understood on items 1 & 2, thank you.
    For items 3 & 4:

    #3 You mentioned a "hall sensor interface spec".
    a. Could you please let me know the title of this document and its specific location?

    #4 For changing to 30, 60 degree, etc., you mentioned changing the "control coder".
    a. What is this...is this the control code? Would the hardware also have to change? Please let me know what has to change: the software and/or hardware and any details you might have about how to do this.

    b. Could one fit up to six hall effect sensors on this evaluation board package I am using for just one motor without modifying the hardware? And if not, what hardware change would need to be made to the evaluation board(s) to use six sensors for just one motor...

    c. If six hall effect sensors were used at a 30 degree angle, only one side of the motor would have the sensors--is this okay/would this work, or do sensors need to be evenly spaced around entire circumference of the motor?

    d. Is there an advantage to use other configurations besides the standard three sensors placed at 120 degrees? For example, is six sensors at 30 degrees better/any advantage over the standard three at 120 degrees?
  • 0 in reply to Yanming Luo
    Prodigy 120 points

    I actually found already answers to all of my questions here, with the exception of one; I will open up a separate post for it.

    Thank you,

  • 0 in reply to PHR
    Prodigy 120 points
    Opening up another post for the one remaining questions,