make up natural cara make up make up tutorial make up korea make up minimalis make up artis make up mata belajar make up make up wardah alat make up makeup forever indonesia makeup artist jakarta tips make up barbie make up natural make up make up wajah make up pesta make up syahrini makeup mata makeup minimalis peralatan make up make up cantik make up mac make up kit jual make up make up sederhana perlengkapan make up gambar make up vidio make up cara makeup minimalis wardah make up make up pac make up glamour cara memakai makeup make up panggung harga make up make up modern make up alami make up dasar pixy make up make up muslimah make up oriflame make up jepang makeover cosmetic make up ultima make up sariayu grosir make up makeup fantasi makeup pesta tas makeup langkah make up make up pria make up malam alat makeup tahapan make up produk make up shading make up mak up make up kebaya make up jilbab make up inez make up simpel contoh make up cara ber makeup makeup wajah tanpa make up make up terbaru toko make up mac makeup indonesia make up soft urutan make up trik make up makeover makeup brand gusnaldi make up paket make up panduan make up jual makeup brush make up bagus alat2 make up make up gusnaldi aplikasi make up alat alat makeup dasar make up inez make up peralatan makeup make up wanita make up berjilbab make up tebal sejarah make up make up maybeline make up branded make up siang tata cara makeup reseller make up make up muslim make up maybelin warna make up tips make up artist rias make up make up mata make up artis belajar make up make up artist kursus make up kuas make up make up forever indonesia jual make up mac indonesia make up make up artist indonesia harga make up forever jual make up online make up pac make up forever jakarta make up oriflame jual make up forever make up online shop indonesia harga make up sekolah make up grosir make up harga make up maybelline jual make up murah make up terbaru mak up mac make up indonesia sofia make up make up kit murah mac makeup indonesia produk make up jual make up kit make up store indonesia make up forever academy jakarta toko make up online jual make up set jual make up mac make up beauty jual make up branded produk make up mac make up forever harga make up mac indonesia produk make up artis jual make up palette produk make up forever make up palette murah before after make up pengantin before after make up sendiri before n after hasil makeup contoh make up karakter contoh riasan pengantin before n after harga make up wisuda harga make up artist harga make up forever make up wisuda rias wisuda di jogja Daftar harga make up forever daftar harga make up mac daftar harga kosmetik make up forever makeup wisuda harga makeup wisuda kursus make up di yogyakarta kursus make up di jogja kursus make up jogja kursus make up yogyakarta kursus kecantikan di yogyakarta kursus kecantikan di jogja kursus make up artist di jogja kursus rias pengantin di jogja kursus rias di yogyakarta kursus tata rias di yogyakarta rias pengantin muslim jogja jasa kreasi jilbab wisuda yogyakarta jasa rias make up wisuda murah bagus bisa dpanggil tempat make uf di jigja yang bagus rias wisuda murah dan berkualitas yogyakarta pakar kreasi jilbab di jogja make uper natural yogya make up wisuda hijab area jogja make up dan kreasi jilbab yang bagus di jogja jasa make up natural untuk wisuda jogja makeup jogja make up jogja makeup yogyakarta make up yogyakarta makeup wisuda jogja make up wisuda jogja make up wisuda yogyakarta makeup wisuda yogyakarta
Search - Content
Search - People/Events
Search - Forums
Search - Newsfeeds



jobcenterbanner

FacebookLinkedinPinterestYoutube
Welcome, Guest
Username: Password: Remember me
If you have a question regarding coaxial, telephone, and building wire, power cable, insulation, extrusion, bunching, stranding, braiding, etc. post it here.

TOPIC: skin effect and mutual coupling in stranded wire

skin effect and mutual coupling in stranded wire 2 years 6 months ago #569

If AC is appied to stranded copper wire, does skin effect come into play? It would seem that while the strands go from inside to out and back, they are NOT perfectly isolated, as in the case of litz wire, therefore that skin effect would come in to play as the frequency is increased. Does anyone have any research or cited material that can answer this? Is there any way to calculate how much the skin effect is effected by the wire jumping from out to center and back again?
The administrator has disabled public write access.

Re: skin effect and mutual coupling in stranded wire 2 years 6 months ago #570

"If a conductor is carrying high alternating currents, the distribution of current is not evenly distributed throughout the cross section of the conductor.

This is due to two independent effects known as the "Skin Effect" and the "Proximity Effect".

If a conductor is comprised of a large number of concentric circular elements or strands, those strands at the center of the overall conductor will be enveloped by a greater magnetic flux than those at the outside. Thus the self-induced back e.m.f. will be greater towards the center of the conductor thereby causing the current density at the center to be less than at the conductor surface. The extra concentration at the surface is known as the skin effect and results in an increase in the effective resistance of the conductor. The magnitude of the skin effect is influenced by the frequency, the size of the conductor, the amount of current flowing and the diameter of the conductor.

The proximity effect also increases the effective resistance and is associated with the fields of two conductors which are close together."

Reference "Electrical Cables Handbook" D. MCAllister

This 880 page book is out of print but hopefully it is in your company library or in an university engineering library near your location.

As you might imagine, the mathematical analysis is quite complex because of all the possible variations so your question regarding the skin effect of a strand or strands randomly moving in and out of the center of a few carefully defined conductors might be a great topic for a Masters or Ph.D. Thesis in Electrical Engineering, Engineering Physics or Theoretical Physics.

As far as Litz wire is concerned, take a look at this web page www.litz-wire.com/technical.html

Kindest regards,
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
The administrator has disabled public write access.
Time to create page: 0.308 seconds