given field distribution using complex objective function. A BLDC motor pole is designedfor optimal shape determination. This example illustrates multiparametric optimizationproblem. GA method realization offers some strong advantages in that casesuch as fast global minimum reaching and high accuracy due to Femm model includedin optimization process.7. AcknowledgementPart of this research is supported by the National Science Fund of the Ministry of Educationand Science of Bulgaria under Contract “D002-157/2008”.REFERENCES[1] Jabbari A., Shakeri M., Gholamian A., (2009), Rotor Pole Shape Optimizationof Permanent Magnet Brushless DC Motors Using the Reduced Basis Technique,Advances in Electrical and Computer Eng., Vol. 9, No. 2, pp. 75-81.[2] Timarac I., Gacanovic M., Genetic algorithms and their application in solvingshape optimization problems in electromagnetics, Proceedings of the InternationalPhD Seminar “Computational Electromagnetics and Technical Applications”,Banjaluka, Bosnia and Herzegovina, 2006.[3] Wiak S., Krawczyk A., Doležel I., Intelligent computer techniques in appliedelectromagnetics, Springer-Verlag, 2008.[4] Di Barba P., Multiobjective shape design in electricity and magnetism, Springer,2010.[5] Di Barba P., Savini A., Wiak S., Field models in electricity and magnetism,Springer, 2008.[6] Alexandrov A., Computer aided design of electrical apparatus, Avangard-Prima, 2004.[7] Meeker D., Finite element method magnetics, Version 4.2, User’s manual, 2009.[8] Meeker D., Finite element method magnetics: OctaveFEMM, Version 1.2, User’smanual, 2009.[9] Matlab Inc, The Language of Technical Computing, MATLAB Graphics Reference,2006.[10] Terzova A., Katsarski K., Kashukeev K., Mateev V., Marinova I., (2010),Computer Modelling and Optimization of Electromagnets in Education onElectrical Apparatus, Proceedings of the International PhD Seminar “ComputationalElectromagnetics and Optimization in Electrical Engineering”, 10-13 September2010, Sofia, Bulgaria, 2010, pp. 154-158.Автори: Илиа<strong>на</strong> Маринова, професор дтн инж., катедра “Електрически апарати”,еmail: iliana@tu-sofia.bg; бак. инж. Анелия Терзова, студент, катедра “Електрическиапарати”; маг. инж. Валентин Матеев, асистент, катедра “Електрическиапарати”, еmail: vmateev@tu-sofia.bgПостъпила <strong>на</strong> 09.11.<strong>2011</strong>Рецензент проф. дтн E. Николов112
<strong>Годишник</strong> <strong>на</strong> <strong>Технически</strong> Университет - <strong>София</strong>, т. <strong>61</strong>, кн.2, <strong>2011</strong>Proceedings of the Technical University - Sofia, v. <strong>61</strong>, book 2, <strong>2011</strong>МОДЕЛИРАНЕ НА ПРЕХОДЕН ПРОЦЕС НА ЕЛЕКТРОМАГНИТЕНИЗПЪЛНИТЕЛЕН МЕХАНИЗЪМВалентин Матеев, Илиа<strong>на</strong> Маринова, Анелия ТерзоваРезюме: В статията е разгледан подход за изграждане <strong>на</strong> многосвързан модел,обединяващ задача за а<strong>на</strong>лиз <strong>на</strong> поле <strong>на</strong> електромагнитно устройство заедно селектрическата му верига. Моделът <strong>на</strong> електрическата верига е реализиран всреда Matlab/Simulink. Полевите модели са изпълнени с компютър<strong>на</strong>та програмаFemm. Двете задачи в двете среди са свързани и решени последователно завсяко стъпка във времевата област. Възможностите <strong>на</strong> подхода са демонстриранипри изследването <strong>на</strong> преходен процес <strong>на</strong> включване <strong>на</strong> електромагнитенизпълнителен механизъм.Ключови думи: многосвързани задачи, свързани задачи поле електрическа верига,електромагнитни механизми, моделиранеTRANSIENT ELECTROMAGNETIC MODELING OF ELECTROMAG-NETIC SYSTEMValentin Mateev, Iliana Marinova, Aneliya TerzovaAbstract: In this work a general approach to couple field models with electric circuitsis presented. Transient 2D finite element field models and circuit coupling are described.The system of electric circuit is created in Matlab/Simulink environment.Field modeling employs the Femm software package. They are coupled together andsolved simultaneously at each time step in the time domain. A DC electromagnetic actuatorwith controllable power supply is investigated as application example.Keywords: multyphysics field modeling, circuit coupling, electromagnetic systemmodeling.1. IntroductionThe process of numerical simulation of electrical equipment requires that the effectof electric and power electronic circuits to be considered. To take geometric complexity,non-linearity, induced eddy currents, mechanical movement and electric circuitswith general topologies into account, it is necessary to couple the Finite ElementMethod (FEM) with electric circuit analysis. For higher accuracy, it is essential totake into account the interaction of the physical field models in FEM domain with circuitdomain.© <strong>2011</strong> Publishing House of Technical University of Sofia113All rights reserved ISSN 1311-0829
- Page 1 and 2:
ISSN 1311-0829ГОДИШНИК НА
- Page 3 and 4:
Годишник на Технич
- Page 5 and 6:
Годишник на Технич
- Page 7:
Годишник на Технич
- Page 10 and 11:
• If a neutral element 1 of the s
- Page 12 and 13:
Proof. (i) Since for arbitrary ≀
- Page 14 and 15:
)is the endomorphism ≀ 0, . . . ,
- Page 16 and 17:
∣∣E (k)C n∣ ∣∣ =Propositi
- Page 18 and 19:
For k = 0 and s = 1 from the last p
- Page 20 and 21:
Facts concerning semilattices can b
- Page 22 and 23:
described by the following join-tab
- Page 24 and 25:
Finally we observe{aj , if i = k(f
- Page 26 and 27:
Let us consider the endomorphisms f
- Page 28 and 29:
Proposition 3.8 For any n ≥ 2 in
- Page 30 and 31:
Cryptographic protocols based on DL
- Page 32 and 33:
2.5 Bi-Semigroup Action Problem (BS
- Page 35 and 36:
Theorem 4.5 [14]. In the center of
- Page 37 and 38:
The only way we know for an attacke
- Page 39 and 40:
Годишник на Технич
- Page 41 and 42:
The exact definitions of points and
- Page 43 and 44:
FirstIterationSecondIterationx 0 0
- Page 45 and 46:
* x4. Order of approximationBecause
- Page 47 and 48:
Годишник на Технич
- Page 49 and 50:
генератори, присъе
- Page 55 and 56:
№ РежимТабл.4.1 Бала
- Page 57 and 58:
Годишник на Технич
- Page 59 and 60:
Табл.11 2 3 4 5 6 7Загуби
- Page 61 and 62: оцени разхода на ак
- Page 63 and 64: сформатора се нала
- Page 65 and 66: -да допуска претова
- Page 67 and 68: Годишник на Технич
- Page 69 and 70: -големи трудности п
- Page 71 and 72: трансформаторът се
- Page 73 and 74: При известно фазов
- Page 75 and 76: KU BHOCHR (12)w w wЗа да се
- Page 77 and 78: Годишник на Технич
- Page 79 and 80: aided impregnation of wood and wood
- Page 81 and 82: different as a result of the differ
- Page 83 and 84: Table 2. Carbon peak C s1 component
- Page 85 and 86: Годишник на Технич
- Page 87 and 88: esults indicating that the reductio
- Page 89 and 90: Change of Mass M, %100-10-20-30-40
- Page 91 and 92: However, the correlation between re
- Page 93 and 94: Electrical Apparatus and Technologi
- Page 95 and 96: Годишник на Технич
- Page 97 and 98: - преходът към стри
- Page 99 and 100: или магнитно изоли
- Page 101 and 102: от лист електротех
- Page 103 and 104: Фиг. 6. Изменение на
- Page 105 and 106: Годишник на Технич
- Page 107 and 108: Fig.1 Block structure of proposed o
- Page 109 and 110: Fig.4. Initial and best shape of po
- Page 111: Fig.8 Calculated initial cogging to
- Page 115 and 116: Octave/Lua interface is a Matlab to
- Page 117 and 118: pends on the results of the thermal
- Page 119 and 120: 4. ResultsAs it has been mentioned
- Page 121 and 122: A DC electromagnetic actuators with
- Page 123 and 124: Годишник на Технич
- Page 125 and 126: ращ се наблизо пров
- Page 127 and 128: Фиг. 4. Зависимост н
- Page 129 and 130: че максималната то
- Page 131 and 132: 3.7. Ефект близост в
- Page 133 and 134: Годишник на Технич
- Page 135 and 136: 11 c x6T 2 c3c4c5ec p c1c , (2)
- Page 137 and 138: От кривата на макси
- Page 139 and 140: 109.598.5Wind speed, m/s87.576.565.
- Page 141 and 142: 6. ЗаключениеВ стат
- Page 143 and 144: Годишник на Технич
- Page 145 and 146: Фиг.1. Заместваща сх
- Page 147 and 148: където t е времето м
- Page 149 and 150: Бяха проведени и ек
- Page 151 and 152: Представени са рез
- Page 153 and 154: Годишник на Технич
- Page 155 and 156: Фиг.3. Архитектури н
- Page 157 and 158: P SC_refP batP WP HGP storP bat_ref
- Page 159 and 160: 1500Фиг.9. Модел в Matlab/
- Page 161 and 162: Isc, AVsc, V50403020100-10-20-30-40
- Page 163 and 164:
Годишник на Технич
- Page 165 and 166:
шаване на температ
- Page 167 and 168:
При променлив темп
- Page 169 and 170:
Годишник на Технич
- Page 171 and 172:
2. Примерни компютъ
- Page 173 and 174:
3.3. Изследване на фо
- Page 175 and 176:
алгебра. За целта с
- Page 177 and 178:
3.13. Изчисляване на
- Page 179 and 180:
Годишник на Технич
- Page 181 and 182:
Количеството на от
- Page 183 and 184:
(CaSO 4 .2H 2 O) (фиг. 3). То
- Page 185 and 186:
работят всички инс
- Page 187 and 188:
(НДНТ), което за Бъл
- Page 189 and 190:
Годишник на Технич
- Page 191 and 192:
Communications software and hardwar
- Page 193 and 194:
puter is running virtualization sof
- Page 195 and 196:
execution to the dispatcher applica
- Page 197 and 198:
Годишник на Технич
- Page 199 and 200:
Тунелирането скрив
- Page 201 and 202:
управление на ресу
- Page 203 and 204:
Фиг.6: Симулационен
- Page 205 and 206:
tunnel source 1.1.1.1tunnel destina
- Page 207 and 208:
Годишник на Технич
- Page 209 and 210:
При отворена вериг
- Page 211 and 212:
Таблица 3Задвижващ
- Page 213 and 214:
Фигура 3.При съотно
- Page 215 and 216:
Годишник на Технич
- Page 217 and 218:
Необходимо е така д
- Page 219 and 220:
yследователно:( k )UOsi
- Page 221 and 222:
Годишник на Технич
- Page 223 and 224:
Laskin and Wang presented a detaile
- Page 225 and 226:
Figure 2: Temperature dependence of
- Page 227 and 228:
An additional analysis obtained at