Unit Conversion, kRPM/V

  • Thread starter Blues_MTA
  • Start date
  • #1
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For a motor modeling project im trying to find a value that is measured in Volts/kRPM (Voltage constant) , in the motor specs that I am given i have a value in RPM/Kv,

If the value for RPM/Kv given is 245, how can i find Volts/KRPM, or is that even possible

Thanks!
 
Last edited:

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
I assume K means 103

so 245 rpm/kV = 0.245 rpm/V


So now dividing by 1000, 0.245(10-3)krpm/V.

Just invert now to get the units of V/krpm.
 
  • #3
18
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So, it would be 1/0.245(10^-3)?

That comes to 408, which is a ridiculously high voltage constant, or at least from what ive seen anyway
 
  • #4
cjl
Science Advisor
1,864
437
My guess is that your second value is in kRPM/V, not RPM/kV. Very few motors run on thousands of volts, so RPM/kV wouldn't make sense as a unit.
 

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