magnetic circuits {renpow}

Magnetic circuit calculations

Description

Calculates magnetic elements and circuits

Usage

reluctance(x)
inductor(x)
flux(x)

Arguments

x

argument to reluctance or to inductance. For reluctance it is a list of one or more arrays; for instance, one array c(mu,l,A) where mu is relative permeability, l is path length, and A is cross-area. For inductance it is a list(N,rel) where N is number of turns and rel is reluctance For flux it is a list(N,i,rel)where N is number of turns, i is current, and rel is reluctance

Details

Function reluctance calculates reluctance in MA-turn/Wb from mu relative permeability, l path length, and A cross-area. Function inductor calculates inductance in mH from number of turns N and reluctance Function flux calculates magnetic flux from number of turns, current, and reluctance

Value

rel

reluctance value from reluctance, inductor, or flux functions

prnt

printout of reluctance,inductance, or flux including value and units

L

inductance value from inductor or flux functions

mmf

magnetomotive force or mmf

flux

magnetic flux value

Note

Functions used in Chapters 5 and 10 of Acevedo (2018)

Author(s)

Miguel F. Acevedo [e-mail]

References

Acevedo, M.F. 2018. Introduction to Renewable Electric Power Systems and the Environment with R. Boca Raton, FL: CRC Press. (ISBN 9781138197343)

Irwin, J.D. and R.M. Nelms. 2011. Basic Engineering Circuit Analysis. 11th edition. 2011: Wiley.

Examples

# Chapter 5 simple inductor
mu=1000; l=1*10^-2; A=pi*(1*10^-3)^2
reluc <- reluctance(x=list(c(mu,l,A)))
reluc$prnt
ind <- inductor(x=list(N=159,rel=reluc$rel))
ind$prnt

# Chapter 10 air gaped inductor
mucore=1000; lcore=6*10^-2; Acore=1*10^-4
mugap=1; lgap=1*10^-3; Agap <- Acore
reluc <- reluctance(x=list(c(mucore,lcore,Acore),c(mugap,lgap,Agap)))
reluc$prnt

rel.eq <- reluc$rel[1]+reluc$rel[2] 
ind <- inductor(x=list(N=100,rel=rel.eq))
ind$prnt

magckt <- flux(x=list(N=10,i=1,rel=rel.eq))
magckt$prnt

magckt <- flux(x=list(N=10,i=1,r=reluc$r[2]))
magckt$prnt