Volume 61 Issue 2 (2011) - Годишник на ТУ - София - Технически ...

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Fig.6 Magnetic field distribution during shape optimization processFig.7 BLDC motor magnetic field distribution whit poles best shapeResult for cogging torque values in BLDC motor is calculated by Femm model. Calculatedinitial cogging torque values and final cogging torque are shown on Fig.8.110
Fig.8 Calculated initial cogging torque values and final cogging torque in motor.Fig.9 Optimization process progress for each generation.Optimization process progress for each generation is shown on Fig 9. There the evolutionof best solution can be observed for sequence of different generations. In thatcase optimization process includes 55 generations for reaching minimal coggingtorque value criteria.6. ConclusionHighly effective and fast method and implementation for two-dimensional pole andmagnet shape optimization for permanent magnet motor is introduced in this paper.Method is based on GA minimization which employs a finite element method model.Optimization is made by genetic algorithm toolbox of Matlab which employs theFemm model true Octave/Lua interface. Finite element method is used to solve electromagneticproblem. Computations were automated using Octave-Femm library.Matlab environment offers easy storage, processing and visualization of optimizationprocess data. Method’s capabilities are for general optimal shape determination for111
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ISSN 1311-0829ГОДИШНИК НА
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Годишник на Технич
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• If a neutral element 1 of the s
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Proof. (i) Since for arbitrary ≀
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)is the endomorphism ≀ 0, . . . ,
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∣∣E (k)C n∣ ∣∣ =Propositi
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For k = 0 and s = 1 from the last p
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Facts concerning semilattices can b
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described by the following join-tab
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Finally we observe{aj , if i = k(f
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Let us consider the endomorphisms f
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Proposition 3.8 For any n ≥ 2 in
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Cryptographic protocols based on DL
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2.5 Bi-Semigroup Action Problem (BS
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Theorem 4.5 [14]. In the center of
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The only way we know for an attacke
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The exact definitions of points and
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FirstIterationSecondIterationx 0 0
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* x4. Order of approximationBecause
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генератори, присъе
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№ РежимТабл.4.1 Бала
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Page 59 and 60: Табл.11 2 3 4 5 6 7Загуби
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Page 79 and 80: aided impregnation of wood and wood
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Page 119 and 120: 4. ResultsAs it has been mentioned
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Isc, AVsc, V50403020100-10-20-30-40
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шаване на температ
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При променлив темп
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2. Примерни компютъ
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3.3. Изследване на фо
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алгебра. За целта с
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3.13. Изчисляване на
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Количеството на от
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(CaSO 4 .2H 2 O) (фиг. 3). То
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работят всички инс
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(НДНТ), което за Бъл
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Communications software and hardwar
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puter is running virtualization sof
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execution to the dispatcher applica
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Тунелирането скрив
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управление на ресу
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Фиг.6: Симулационен
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tunnel source 1.1.1.1tunnel destina
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При отворена вериг
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Таблица 3Задвижващ
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Фигура 3.При съотно
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Необходимо е така д
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yследователно:( k )UOsi
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Laskin and Wang presented a detaile
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Figure 2: Temperature dependence of
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An additional analysis obtained at
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Volume 61 Issue 2 (2011) - Годишник на ТУ - София - Технически ...

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