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TIDM-02007: Question about relationship between iq and current

Jenson
Intellectual 2305 points
Part Number: TIDM-02007

Hi Team,

I am using this design to make plans for clients.
At present, I want to make sure that M1_BASE_CURRENT has a corresponding relationship with iq. If iq_ref=0.1 is set in LEVEL3, then the current output by the motor is 0.1*M1_BASE_CURRENT, right?

I want to know if my understanding is correct? If not correct? In level3, how should the output current corresponding to the input of iq_ref be calculated? (For example, if I input iq_ref=0.1, what is the corresponding output phase current?)

Because I modified M1_BASE_CURRENT, it doesn't seem to achieve the effect I want. .

Thanks for your help.

Jenson

  • 0
    TI__Mastermind 27240 points

    Yes, IqRef = 0.1 means 0.1*M1_BASE_CURRENT.

    You cannot randomly modify M1_BASE_CURRENT, it is based on the hardware feedback design circuit. If your board senses 20A while giving a max feedback voltage of 3.3V, then BASE_CURRENT of this board is 20A/2 = 10A. We divide by 2 because the current can be positive cycle or negative cycle and can carry 10A max in each direction. 

    Hope it clarifies.