Two electricity questions about KVL and a pole numbers

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SUMMARY

The discussion focuses on Kirchhoff's Voltage Law (KVL) and the determination of pole numbers in electric motors. The formula ns=120*f/p is highlighted, where 'ns' is synchronous speed, 'f' is frequency, and 'p' is the number of poles. Participants clarify that the number of poles is related to the type of motor, with common values being 2, 4, 6, or 8. The conversation also touches on the application of KVL in circuits involving current sources.

PREREQUISITES
  • Understanding of Kirchhoff's Voltage Law (KVL)
  • Basic knowledge of electric motor types and their characteristics
  • Familiarity with synchronous speed calculations
  • Concept of current sources in electrical circuits
NEXT STEPS
  • Research the application of KVL in circuits with current sources
  • Study the relationship between motor types and pole numbers
  • Learn about synchronous speed calculations in AC motors
  • Explore the implications of pole numbers on motor performance
USEFUL FOR

Electrical engineers, students studying motor control systems, and anyone involved in the design or analysis of electric motors and circuits.

TheNaturalStep
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What happens when you do a KVL through and current source?

A formula I can not understand

ns=120*f/p

f=frequency P=number of poles …..

How shall you know how many poles you got?, my old teacher just wrote it down as it would be obvious. But I think ti is related to what kind of engine you got …

Kindly TNS
 
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LOL. You really had me going there for a moment. I thought you were referring to poles in the complex plane for the circuit polynomial transfer function.

You are referring to magnetic poles in a motor drive instead. That's where the 120 comes from (at least in the US -- it would be 100 in Europe). What current source are you referring to in your KVL? Are you trying to write a KVL around all the loops in a motor?
 
1 No i just wonder how i shall i do an KVL when i ahve an current source.

2 about the polles they say they can be

P= 2 4 6 8 ... but i don't know how you know which ...
 

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