دانلود رایگان مقاله لاتین ظرفیت القاگرى ماشین ac از سایت الزویر
عنوان فارسی مقاله:
محاسبه مستقیم ظرفیت القاگرى ماشین AC بر اساس تئوری تابع سیم پیچى
عنوان انگلیسی مقاله:
Direct computation of ac machine inductances based on winding function theory
سال انتشار : 2009
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مقدمه انگلیسی مقاله:
1. Introduction
The winding function (WF) theory developed in the early 1950s is a veritable tool for calculation of ac machine inductances [1,2]. The finite element (FE) method [3] though more accurate is cumbersome because it requires an extensive characterization of the machine studied, for example, the physical geometry, instantaneous winding current distribution, electromagnetic properties of all the materials making up the machine and an advanced knowledge of electromagnetic fields. Additionally, several boundary conditions must be specified before the model calculations can be performed. In this paper, it is shown that the WF method can by very simple numerical procedure, yield very accurate results even though the only information required are the winding layout and machine geometry. However, if more machine parameters other than inductances are required, FE may be a better option. In traditional WF procedures, only the fundamental components of winding functions and only the average plus the second harmonic component of the inverse airgap functions are used. The expressions are so truncated because the known WF formula for calculating inductances requires that explicit expressions for the winding pattern and inverse gap function be obtained. These, coupled with the assumptions that the windings are placed in the periphery of the airgap whereas they are in slots, reduces the accuracy of the computed results. Even with such simplifications, the integrations to be performed can be challenging. After these, the inductance expressions so obtained in the a–b–c frame will be easy to transform to d-q-0 frame. However, the end results in the d-q-0 frame are not required in the form of expressions and therefore, the intermediate expressions obtained for the inductances in the a–b–c frame are not so useful. The recent papers [4,5] on this subject modified the inverse airgap function with a model of the slots and skew and obtained excellent results that compare very favorably with the finite element solutions. Although they included the effect of slots, it appears that approximated Fourier series expressions were still used. This study emphasizes the need to use directly the actual machine geometry and winding placement positions to perform these calculations and not approximate expressions representing them. This will ensure that all space harmonics ignored by the Fourier series expressions are included in the results. In this paper, the calculation of inductances of a cageless rotor three-phase synchronous reluctance motor whose design data is shown in Table 1 is used to demonstrate the procedure. 1.1. The winding function The WF theory [2] states that the inductance LXY between any two windings X and Y is
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کلمات کلیدی:
On determination of inductances for circuit models of AC machines ... https://www.degruyter.com/view/j/aee.2013.62.issue-3/aee.../aee-2013-0039.xml by TJ Sobczyk - 2013 - Cited by 2 - Related articles Sep 10, 2013 - On determination of inductances for circuit models of AC machines ... Approach to Modelling the Magnetic Non-Linearity in AC Machines,Part I ... [PDF]Direct computation of ac machine inductances based on winding ... iranarze.ir/wp-content/uploads/2016/10/E2493.pdf Dec 9, 2008 - The inductances obtained are subsequently transformed to d-q-0 reference ... is a veritable tool for calculation of ac machine inductances [1,2]. [PDF]Calculation of d- and q-axis inductances of PM brushless ac machines ... eprints.whiterose.ac.uk/860/1/zhuzq2.pdf by YS Chen - 2005 - Cited by 63 - Related articles This is an author produced version of Calculation of d and q a is inductances of PM ... permanent magnet (PM) brushless ac machines, with due account for the ... Calculation of d-and q-axis inductances of PM brushless ac machines ... ieeexplore.ieee.org/abstract/document/1519495/ by YS Chen - 2005 - Cited by 63 - Related articles A hybrid two-dimensional (2-D) finite-element/analytical technique is described for predicting the d-axis and q-axis inductances of permanent magnet (PM) b. AC Machine Systems: Mathematical Model and Parameters, Analysis, and ... https://books.google.com/books?isbn=3642011535 Jingde Gao, Linzheng Zhang, Xiangheng Wang - 2010 - Technology & Engineering where L is self inductance; M is mutual inductance; each subscript ... by loop currents in ac machines are divided into two kinds, one is the leakage, and the ... [PDF]pebn002 inductance measurements for synchronous machines www.eleceng.adelaide.edu.au/.../pebn002%20inductance%20measurements%20for%... by WL Soong - Cited by 17 - Related articles Jul 24, 2008 - The tests are also applicable to transformers and inductors. Note that standstill methods are not suitable for use with induction machines. [PDF]Main inductance determination in rotating machines. Analytical ... - aedie www.aedie.org/9CHLIE-paper-send/219-BARGALLO.pdf by R Bargallo - Related articles Main inductance determination in rotating machines. ... analytical expression for the main inductances. .... For example for the induction machine model with 3. Searches related to ac machine inductances synchronous inductance synchronous machine inductances d axis and q axis inductance direct and quadrature axis theory synchronous machine pdf mutual inductance formula self inductance
