• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 29 subscribers
  • Views 800 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

BEST SOLUTION FOR A 48V/200W BLDC MOTOR FOR HANDY TOOL

Fabio Cernuschi
Prodigy 50 points
Other Parts Discussed in Thread: DRV8301, DRV8320, DRV8303EVM, BOOSTXL-DRV8301, MOTORWARE

Hallo,

we are developing a new tool based on a 48V brushless motor.

This tool is a rotorbital sander, and since this is a palm-style tool, we need to reduce the PCB dimensions as much as possible.

We prefer to start first with an EVALUATION BOARD to test either the motor either the SW and CPU performances (the motor is a totally new design).

Then we will develop the final board after having evaluated the best HW & SW solutions.

Now we would like to have some suggestions regarding:

  • the DEV KIT
  • the SW

Thank you very much for your time!

Best Regards

Fabio

  • 0
    TI__Guru** 114905 points
    Hi Fabio,

    A 48V bldc limits your choices. Please see the link: www.ti.com/.../brushless-dc-gate-drivers-products.page for options
  • 0 in reply to Rick Duncan
    Prodigy 50 points

    Hallo Rick,

    thank you very much for your prompt reply. 

    I would definitively go to DRV8301/02/03 or DRV8320/23, but these last one are not available.

    If I understood correctly, the family is a Three-Phase Driver for BLDC. They are all suited for 60DCV max. The 8301 has SPI interface, the 8302 has Hardware Control Interface (maybe HCI has a faster response?), the 8303 has a SPI interface, and DOES NOT HAVE the BUCK STEP DOWN CONVERTER.

    I found two different DEV BOARD:

    • DRV8302-HC-C2-KIT
    • DRV8303EVM 
    • These two boards have their own SW.
    • Wich one do you suggest?

    My doubt is regarding the back emf in stopping the motor: in fact someone says that spikes can reach 100/150 volt depending on the inertia of the rotor.

    In that case the devices of the DRV series will be definitively damaged, or there is a solution to protect them?

    Thank you very much for your kind attention and support!

    Warmest Regards

    Fabio

  • 0 in reply to Fabio Cernuschi
    TI__Guru** 114905 points
    Hi Fabio,

    Either board works. I would suggest the www.ti.com/.../DRV8301-HC-C2-KIT, although the other two would also work.

    Care should be taken when stopping a motor. TVS diodes, large bulk capacitors, and other circuits can be used to limit the voltage at DRV8301.

    Another board to examine is the BOOSTXL-DRV8301. While it does not meet the stated voltage specifications, it is an example of the PCB layout.
  • 0 in reply to Rick Duncan
    Prodigy 50 points

    Hi Rick,

    Bought from Mouser the DRV8303EVM, very well developed.

    I installed correctly the CCS, drivers and the InstaSPIN SW.

    Now I am ready to....wait for your precious support ☺

    The problem now is:

    How to fine tune the motor parameters?

    Do I use Motorware?

    Can you suggest me some tricks?

    It seems it's getting more and more difficult....

    Thank you very much for your precious help!

    Ciao

    Fabio

    PS:  do you think it can be possible to find a FAE here in Italy?