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Help! Upgrading BoostXL-Drv8301 board

Nish Kz
Prodigy 65 points
Other Parts Discussed in Thread: BOOSTXL-DRV8301, DRV8301, DRV8301-69M-KIT

Hello,

I am a newbie, Just tried out C2000 Launchpad and Boostxl-Drv8301 for my BLDC motor. The Motor took so much of current that the board now has stopped spinning the motor and if i try to re calculate the parameters it just keeps on increasing the resistane Value ( Rs )- Any Solution what might have been gone bad on the board?

I wanted to Upgrade the board with a new design for 120V and 300Amps continuous. Can you please help me out on figuring what all components needs to be changed and also changes in the program?

-Nishant

  • TI__Guru** 118000 points

    Did you try to run your 120V/300A motor with a 24V/10A inverter?

    What is more likely to have happened is a large voltage created on the bus from the motor Bemf, eventually blowing the DRV8301 device. 

    You can't "upgrade" the PCB you have, it is much too small to dissipate the heat from the current. Your inverter will need to be totally re-designed. Also, the DRV8301 pre-driver can't work at those voltages and neither can the FETs at those curents. Typically in a high current application like yours you may also choose to forego shunts and use in-phase hall based sensors to measure current.

    Even the 60V/40A DRV8301-69M-KIT isn't a good representative of what you will want to do.

     

     

  • in reply to ChrisClearman
    Prodigy 65 points

    Yes I did try to run the motor with this 24V/10A inverter hoping it would give some spins for testing.
    Nut this didnt blew the board in actual, After failure tests with big motor I tried Spinning a small RC 14Pole motor which did run well for few rpms and stalled after which the DRV8301 stopped working.

    I want to actually re design the inverter, but as you mentioned it wont work with DRV8301 Pre-Driver due to voltage limitations. Can you suggest any pre driver for this scenario, I might even increase the voltage a bit more than 120V for future applications and look for some IGBT's.

    -Thanks,

    Nishant

  • in reply to Nish Kz
    TI__Guru** 118000 points

    I would look at Infineon or IR, they will have some modules and inverter kits or HW examples in this range. 

  • in reply to ChrisClearman
    Prodigy 65 points

    Hey Chris,

    Does TI have any hardware solutions or Application Schematic  for EV's as mentioned in the following link:

    Page No 20: http://www.ti.com/lit/ml/szza058c/szza058c.pdf

  • in reply to Nish Kz
    TI__Guru** 118000 points

    No HW. We dont sell high power inverter components and there are some compliance issues that make it unattractive to sell "kits" at this level. Sorry. 

  • in reply to ChrisClearman
    Prodigy 80 points

    Hello  Nishant KZ

    I want to do my proper board  

     My specs are  :

    VDCBUS  600 V

    Rated Current  100 AMP 

    Max Current 150 AMP 

    I this moment i have the driver for the gate of the IGBT and the sensor current .
    Now i want to design my main board to put a 69MISO board and to do the interface with all the other sensor .