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Universal Motor Lab Project - Range of Ld and Lq values

Jacob Philip
Prodigy 80 points
Other Parts Discussed in Thread: BOOSTXL-DRV8323RS, LAUNCHXL-F280025C

Hello,

In the Universal Motor Lab - Build Level 4. For motor Identification, what is the range of Ld and Lq values it can measure regardless of the hardware?

Our Hardware consists of DRV8326RS with F280025C Launchpad, on performing parameter identification on 3 different motors, the Ld and Lq is always 1uH.

  • 0
    TI__Mastermind 21596 points

    Hi Jacob,

    Thanks for your question! I will reassign this post to the team that developed the universal motor lab project. For clarification, do you mean the DRV8323RS EVM? We don't have a DRV8326RS. 

    Regards,

    Anthony 

  • 0
    TI__Intellectual 930 points

    Hi Jacob,

    Our Subject Matter Expert is out of office. Please expect the response by Thursday. Thank you for your patience.

    Regards
    Srikanth

  • 0
    TI__Guru** 111800 points
    Jacob Philip said:
    what is the range of Ld and Lq values it can measure regardless of the hardware?

    It could be several uH to several hundred mH. 

    Jacob Philip said:
    Our Hardware consists of DRV8326RS with F280025C Launchpad

    Are you using the kits supported by the Universal lab? And follow the guide to install and connect the kits? Did you follow the guide to add the 47nF capacitors on the boostxl inverter board for voltage sensing?

  • 0 in reply to Anthony Lodi
    Prodigy 80 points

    Sorry for the late response. Yes, the hardware we are using is DRV8323RS EVM

  • 0 in reply to Yanming Luo
    Prodigy 80 points

    Hello,

    Yes, we are using the EVM kit supported by Universal Motor Lab. We have followed the instruction correctly. Regarding the capacitor as the closest value we had in 0603(inch) package we have is 39nF.. We have calculated USER_M1_VOLTAGE_FILTER_POLE_Hz for this value. 

  • 0 in reply to Jacob Philip
    TI__Guru** 111800 points

    Please the lab user's guide to run the example in build level 1~3 first to verify the connection. And make sure that the capacitors are populated correctly.

    Please make sure that the following items are completed as described below, and then connect the BOOSTXLDRV8323RS. For more details about the BOOSTXL-DRV8323RS, see the User's Guide for the EVM.

    • Connect the BOOSTXL-DRV8323RS to site J1/J3 and J4/J2 of the LAUNCHXL-F280025
    • Populate C9, C10, and C11 with a 47nF capacitor.
    • Bend J3-29 and J3-30 of the LAUNCHXL-F280025C 90 degrees so that they are not connected to the BOOSTXL-DRV8323RS.
    • Use a jumper wire to connect J4-18 to J4-4 of the BOOSTXL-DRV8323RS for using SPIASTE pin of F280025C.

     

    Please make sure that the switches on LAUNCHXL-F280025C are set correctly as shown in lab guide as below also, especially the S2.

    • Install jumpers on JP1, JP2, JP3 and J101 for the power supply and debug JTAG. And jumpers on JP8 for the power supply of DAC128S board if used.
    • For S2, position the SEL1 (LEFT) switch UP (1) to route GPIO28 and GPIO29 to the BoosterPack connector, and position the SEL2 (RIGHT) switch UP (1) to rout GPIO16 and GPIO17 to the virtual COM port of the XDS110 debugger.
    • For S3, position the SEL1(LEFT) switch DOWN to pull GPIO24 low to logic 0, and position the SEL2(RIGHT) switch UP to pull GPIO32 high to logic 1 to put the F280025C into wait boot mode for reducing the risk of connectivity issues or a previous loaded code execution.
    • For S5, position the SEL1(LEFT) switch DOWN to route GPIO44/37/43 to eQEP1 for the encoder interface on J12, and position the SEL2 (RIGHT) switch DOWN to route GPIO14/25/26 to eQEP2 for the Hall sensor interface on J13 if need to implement the sensored-FOC.