60 research outputs found
Vpliv magnetnega nasičenja na stacionarne obratovalne lastnosti reguliranega asinhronskega motorja
The paper presents a method for determination of the steady-state torque characteristics of the induction motor in the case of rotor field-oriented control (RFOC) with nonlinear magnetizing characteristic of the iron core included. The torque characteristics are determined for the constant stator current and the constant d-axis stator current. The characteristics obtained at a constant stator current are used to maximize the torque capability of the RFOC induction motor. The aim of the presented work is to obtain required steady-state torque with minimal stator current. Experiments show that the proposed selection of a magnetizing reference is promising.V članku je predstavljen postopek za določanje navornih karakteristik pri stacionarnem obratovanju asinhronskega stroja v orientaciji rotorskega polja z upoštevanjem magnetnega nasičenja železa. Določene so navorne karakteristike pri konstantnem statorskem toku ▫▫ v d- osi (enačba (6) in sliki 1 in 2), izpostavljena pa je potreba upoštevanja nasičenja pri določitvi navornih karakteristik pri konstantnem statorskem toku Is z enačbo(7) (sliki 3 in 4). Določeni sta tudi krivulji maksimalnega navora v primeru vodenja asinhronskega stroja brez (9) in z (10) upoštevanjem nasičenja. Predlagan je algoritem za primeren izbor referenčne vrednosti toka ▫▫, ki naj bi omogočal tvorjenje zahtevanega navora z najmanjšim statorskim tokom (enačbi (13) in (14)). Krivulja maksimalnega navora reguliranega asinhronskega stroja z upoštevanjem nasičenja je bila potrjena tudi eksperimentalno (sliki 6 in 7). Podani rezultati kažejo, da je smiselno spreminjati referenčno vrednost toka ▫▫ na predlagani način, saj s tem zagotovimo manjši statorski tok in manjše izgube
Linearization of Radial Force Characteristic of Active Magnetic Bearings Using Finite Element Method and Differential Evolution
Artificial Neural Network Applied for Detecting the Saturation Level in the Magnetic Core of a Welding Transformer
Magnetically Nonlinear Dynamic Models of Synchronous Machines: Their Derivation, Parameters and Applications
Role of Biomechanical Parameters in Hip Osteoarthritis and Avascular Necrosis of Femoral Head
Разработка и исследование конструкции привода управляемого задерживающего устройства шароструйно-эжекторного бурового снаряда
В работе рассмотрены принципы шароструйного бурения, а так же устройство шаростуйно-эжекторного снаряда. Предложены варианты модернизации данного снаряда.In this paper, the principles of pellet impact drilling, as well as the construction of a pellet-ejector projectile, are considered. Variants of modernization of this projectile are offered
Comparison of Different 1-D Models for the Calculation of Magnetization Dynamics in Non-Oriented Soft Magnetic Steel Sheets
Effects of Saturation and Hysteresis on Magnetization Dynamics : Influence of Different Material Models
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