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TMS320F28027F: TMS320F28027F

Kamal Mokhtar
Intellectual 420 points
Part Number: TMS320F28027F
Other Parts Discussed in Thread: DRV8301, DRV8323

Hello TI, 

 

Project elements:

- Lab4 FOC

- TMS320F28027F build on custom board.

- The application is for e-bike

- torque value is controlled with a potential meter

I am using many motors, each I have to test and tune, many times I phase the problem that the FETs on the power board gets defected.

My question, is there a way to protect my FETs by attaching a protection circuit between the controller motor phase and the motor it self? something like below. the only thing I was able to do in software is a dead-time for the FETs drivers. any assist or suggestions will be really great

thanks,

kamal

   

  • 0
    TI__Guru** 116210 points
    What MOSFET gate driver was used on your h/w board? What current was sampled in your project?
    You may add a over current protection circuit using 1/6 comparer, and connect this signal from the output of comparer to TZ pin of F28027F. Set the trip zone function to turn off the pwm output.
    Only need 1 comparer if you had a dc current sensing shunt resistor, and need 6 comparers if you used 3-phase current sensing shunt resistors.
    Some gate drivers include over current protection function, will turn off the pwm output and send a signal to F28027F if there is over current, like DRV8301, DRV8323. The datasheet of both can be found in TI website, maybe you can use either one gate drive, it's more easy to implement the function you required.
  • 0 in reply to Yanming Luo
    Intellectual 420 points
    thank you very much Yanming