Equivalent Circuit Parameters for Large Brushless Doubly Fed Machines (BDFM)

Salman Abdi Jalebi; Ehsan Abdi; Ashknaz Oraee; Richard McMahon

doi:10.1109/TEC.2014.2311736

Equivalent Circuit Parameters for Large Brushless Doubly Fed Machines (BDFM)

Salman Abdi Jalebi, Ehsan Abdi, Ashknaz Oraee, Richard McMahon

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

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Abstract

This paper presents analytical methods to calculate the equivalent circuit parameters for large-scale brushless doubly fed machines (BDFMs) with magnetic wedges utilized for closing stator open slots. The use of magnetic wedges reduces the magnetizing currents in the machine, reflected in the values of magnetizing inductances, but also increases leakage fluxes affecting the value of series inductances in the equivalent circuit. Though such effects can be modeled by numerical models, the proposed analytical methods are particularly helpful in optimizing machine design, inverter rating, reactive power management, and grid low-voltage ride-through performance. The conventional analytical methods cannot be readily applied to the BDFM due to its complex magnetic field distribution; this paper presents analytical methods to calculate the magnetizing and leakage inductances for the BDFM with magnetic wedges used in the stator slots. The proposed methods are assessed by experimentally verified finite-element models for a 250 kW BDFM.

Original language	English
Pages (from-to)	706-715
Number of pages	10
Journal	IEEE Transactions on Energy Conversion
Volume	29
Issue number	3
Early online date	17 Apr 2014
DOIs	https://doi.org/10.1109/TEC.2014.2311736
Publication status	Published - Sept 2014

Bibliographical note

© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keywords

Saturation magnetization
Magnetic circuits
Stator windings
Equivalent circuits
Integrated circuit modeling
Rotors
Brushless doubly fed machine (BDFM)
carter factor
coupled-circuit model
finite-element (FE) method
inductance calculation
magnetic wedges
magnetomotive force (MMF)

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10.1109/TEC.2014.2311736

Post-printAccepted author manuscript, 1.99 MBLicence: CC BY-NC

Cite this

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title = "Equivalent Circuit Parameters for Large Brushless Doubly Fed Machines (BDFM)",

abstract = "This paper presents analytical methods to calculate the equivalent circuit parameters for large-scale brushless doubly fed machines (BDFMs) with magnetic wedges utilized for closing stator open slots. The use of magnetic wedges reduces the magnetizing currents in the machine, reflected in the values of magnetizing inductances, but also increases leakage fluxes affecting the value of series inductances in the equivalent circuit. Though such effects can be modeled by numerical models, the proposed analytical methods are particularly helpful in optimizing machine design, inverter rating, reactive power management, and grid low-voltage ride-through performance. The conventional analytical methods cannot be readily applied to the BDFM due to its complex magnetic field distribution; this paper presents analytical methods to calculate the magnetizing and leakage inductances for the BDFM with magnetic wedges used in the stator slots. The proposed methods are assessed by experimentally verified finite-element models for a 250 kW BDFM.",

keywords = "Saturation magnetization, Magnetic circuits, Stator windings, Equivalent circuits, Integrated circuit modeling, Rotors, Brushless doubly fed machine (BDFM), carter factor, coupled-circuit model, finite-element (FE) method, inductance calculation, magnetic wedges, magnetomotive force (MMF)",

author = "{Abdi Jalebi}, Salman and Ehsan Abdi and Ashknaz Oraee and Richard McMahon",

note = "{\textcopyright} 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.",

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AU - Abdi Jalebi, Salman

AU - Abdi, Ehsan

AU - Oraee, Ashknaz

AU - McMahon, Richard

N1 - © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2014/9

Y1 - 2014/9

N2 - This paper presents analytical methods to calculate the equivalent circuit parameters for large-scale brushless doubly fed machines (BDFMs) with magnetic wedges utilized for closing stator open slots. The use of magnetic wedges reduces the magnetizing currents in the machine, reflected in the values of magnetizing inductances, but also increases leakage fluxes affecting the value of series inductances in the equivalent circuit. Though such effects can be modeled by numerical models, the proposed analytical methods are particularly helpful in optimizing machine design, inverter rating, reactive power management, and grid low-voltage ride-through performance. The conventional analytical methods cannot be readily applied to the BDFM due to its complex magnetic field distribution; this paper presents analytical methods to calculate the magnetizing and leakage inductances for the BDFM with magnetic wedges used in the stator slots. The proposed methods are assessed by experimentally verified finite-element models for a 250 kW BDFM.

AB - This paper presents analytical methods to calculate the equivalent circuit parameters for large-scale brushless doubly fed machines (BDFMs) with magnetic wedges utilized for closing stator open slots. The use of magnetic wedges reduces the magnetizing currents in the machine, reflected in the values of magnetizing inductances, but also increases leakage fluxes affecting the value of series inductances in the equivalent circuit. Though such effects can be modeled by numerical models, the proposed analytical methods are particularly helpful in optimizing machine design, inverter rating, reactive power management, and grid low-voltage ride-through performance. The conventional analytical methods cannot be readily applied to the BDFM due to its complex magnetic field distribution; this paper presents analytical methods to calculate the magnetizing and leakage inductances for the BDFM with magnetic wedges used in the stator slots. The proposed methods are assessed by experimentally verified finite-element models for a 250 kW BDFM.

KW - Saturation magnetization

KW - Magnetic circuits

KW - Stator windings

KW - Equivalent circuits

KW - Integrated circuit modeling

KW - Rotors

KW - Brushless doubly fed machine (BDFM)

KW - carter factor

KW - coupled-circuit model

KW - finite-element (FE) method

KW - inductance calculation

KW - magnetic wedges

KW - magnetomotive force (MMF)

U2 - 10.1109/TEC.2014.2311736

DO - 10.1109/TEC.2014.2311736

M3 - Article

SN - 0885-8969

SN - 1558-0059

VL - 29

SP - 706

EP - 715

JO - IEEE Transactions on Energy Conversion

JF - IEEE Transactions on Energy Conversion

IS - 3

ER -

Equivalent Circuit Parameters for Large Brushless Doubly Fed Machines (BDFM)

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