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DRV10983 Motor Velocity Constant

masahiko shimizu
Guru 11235 points
Other Parts Discussed in Thread: DRV10983

Hi,

Could you tell me the following question, please?

Q1: What is Motor Velocity Constant?
　　Does this mean "back-emf constant"? the same mean?

Q2: If it is the same mean above, Could you let me know conversion equation from "back-emf constant[［Vs/rad]" to "Motor Velocity Constant[mV/Hz]"?


Bestregards,
Shimizu

  • 0
    TI__Guru** 114905 points
    Hi Shimizu-san,

    Our experts have been notified and should reply soon.
  • 0 in reply to Rick Duncan
    TI__Expert 3010 points
    Hi Shimizu-san,

    Motor Velocity Constant and back-emf constant are same, its just different nomenclature followed around the world.

    DRV10983 expects back-emf constant to be 0-peak and in mV/Hz, So conversion depends on the value provided for back-emf constant. Value of back-emf constant can be RMS, peak to peak or 0-peak.

    In general, conversion of speed from rad/sec to Hz is 1/2pi -> 0.1591549 Hz

    Regards,
    Krushal