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"ABSTRAKSebenarnya, Gyrator kapasitor hampir menyerupai dengan transformator konventional mempunyai inti magnet permanen dengan permeabilitas tinggi dan diberi celah udara. Konvertor Cuk sebelum modifikasi mempunyai riak arus keluaran lebih dari 30 %, pada saat tanpa beban. Saat ini konvertor Cuk menggunakan metoda soft switching dengan komponen aktif seperti IGBT (Insulated Gate Bipolar Transistor), GTO (Gate Turn Off). Thyristor sebagai switching dengan metoda PWM (Pulse Wave Modulation) sampai menjadi 6 %. Hasil penelitian ini diperoleh dengan menggunakan empat inti magnet tipe E berbahan ferit, berpemeabilitas tinggi, dengan enam celah udara, disertai puntiran konduktor, sehingga mampu meredam riak arus keluaran ketika dibebani R,L dan C. Hasil studi tentang kopling elektromagnetik dengan metoda pendekatan rangkaian magnet, sampai efisiensi 99,4 %, meninggikan magnetomotans dan arus, meredam riak arus 0,36 %. Pemodelan inti magnet tipe E yang terbaik diperoleh pada model 1, dengan tiga konduktor puntir beradius 1,6 10-3mm. Dengan konfigurasi model riak arus keluaran mampu direduksi sampai menjadi 0,036 %.

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ABSTRACTPrincipally, the Gyrator capacitor in the Cuk converter has a similiar construction with an ordinary transformer having a permanent magnet?s core with high permeability and with an air gaps. An ordinary Cuk convertor has an output ripple current more than 30 %, at no load condition. Nowadays the Cuk converter?s use soft switching methods with an active components such as IGBT (insulated Gate Bipolar Transistor), GTO (Gate Turn Off) Thyristors for switching or by using PWM (Pulse Wave Modulation) to reduce the ripple current to 6 %. In this research, the Gyrator capasitor consist of four magnet core type E with 6 air gaps. magnet cores materials of Ferrite having high permeability and twisted conductor winding are being used to reduce the output ripple current for a R, L,C load. The study result about the electromagnetic coupling with the approached magnetic circuit method shows an efficiency 99.4%, the best model of magnetic core is the type E was obtained by the model 1, with three twisted conductor?s of with radius of 1.6 x 10-3 m. By using this configuration, the model enables to reduce output ripple current to 0.036%."

"[ABSTRAK Pengaruh dari kopling tensor, isovektor-isoskalar dan pertukaran elektromagnetikterhadap inti berat dan prediksi inti super berat dipelajari melalui teori RelativisticMean Field (RMF). Ditemukan bahwa ketiga kopling tersebut memberikan penga-ruh yang signikan terhadap sifat materi nuklir, energi ikat, spektrum energi partikeltunggal, distribusi kerapatan dan ketebalan kulit inti berat dan prediksi inti superberat. Hasil Penelitian ini menunjukan bahwa 208Pb dan 292120 adalah double ma-gic nuclei. hasil ini konsisten dengan data eksperimen dan prediksi model RMF,sedangkan hasil utama penelitian ini nememukan bahwa 276U adalah double magicnuclei.ABSTRACT We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange

couplings on heavy and prediction of superheavy nuclei by using RMF model. We

have found that those couplings signicantly in

uence the nuclear matter properties,

binding energy, single particle spectra, nucleon densities and neutron skin of heavy

and superheavy nuclei. Our result show that 208Pb and 292120 are double magic

nuclei. This results are consistent with experimental nding and other RMF model

prediction, while our main result is 276U is also double magic nuclei.;We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange

couplings on heavy and prediction of superheavy nuclei by using RMF model. We

have found that those couplings signicantly in

uence the nuclear matter properties,

binding energy, single particle spectra, nucleon densities and neutron skin of heavy

and superheavy nuclei. Our result show that 208Pb and 292120 are double magic

nuclei. This results are consistent with experimental nding and other RMF model

prediction, while our main result is 276U is also double magic nuclei.;We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange

couplings on heavy and prediction of superheavy nuclei by using RMF model. We

have found that those couplings signicantly in

uence the nuclear matter properties,

binding energy, single particle spectra, nucleon densities and neutron skin of heavy

and superheavy nuclei. Our result show that 208Pb and 292120 are double magic

nuclei. This results are consistent with experimental nding and other RMF model

prediction, while our main result is 276U is also double magic nuclei., We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange

couplings on heavy and prediction of superheavy nuclei by using RMF model. We

have found that those couplings signicantly in

uence the nuclear matter properties,

binding energy, single particle spectra, nucleon densities and neutron skin of heavy

and superheavy nuclei. Our result show that 208Pb and 292120 are double magic

nuclei. This results are consistent with experimental nding and other RMF model

prediction, while our main result is 276U is also double magic nuclei.]"