Unit Conversion: How to Find Volts/kRPM for Motor Modeling with 245 RPM/Kv Value

  • Context: Undergrad 
  • Thread starter Thread starter Blues_MTA
  • Start date Start date
  • Tags Tags
    Unit Unit conversion
Click For Summary

Discussion Overview

The discussion revolves around converting a motor specification value given in RPM/Kv to Volts/kRPM for a motor modeling project. Participants explore the implications of the conversion and the validity of the units involved.

Discussion Character

  • Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks to convert a value of 245 RPM/Kv to Volts/kRPM and questions the feasibility of this conversion.
  • Another participant suggests that K represents 10^3, leading to a conversion of 245 RPM/Kv to 0.245 RPM/V and subsequently to 0.245(10^-3) kRPM/V.
  • A third participant calculates the inverse of the derived value, arriving at a voltage constant of 408, which they express as unusually high based on their experience.
  • A fourth participant proposes that the original value might actually be in kRPM/V rather than RPM/Kv, arguing that high voltage constants are uncommon for motors.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the correct interpretation of the units or the validity of the conversion process. Multiple competing views remain regarding the nature of the original specification and its implications.

Contextual Notes

There are assumptions about the meaning of the units involved, and the discussion does not resolve whether the original specification is correctly interpreted as RPM/Kv or kRPM/V. The calculations presented depend on these interpretations.

Blues_MTA
Messages
18
Reaction score
0
For a motor modeling project I am 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:
Physics news on Phys.org
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.
 
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 I've seen anyway
 
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.
 

Similar threads

  • · Replies 15 ·
Replies
15
Views
2K
Replies
21
Views
3K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 2 ·
Replies
2
Views
12K
Replies
4
Views
3K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 8 ·
Replies
8
Views
3K
Replies
3
Views
7K