Lumped thermal model for the multi‐layer switched reluctance motor

Vahedi, Payam; Ganji, Babak; Afjei, E.

doi:10.1049/iet-epa.2019.1025

Cited by 10 publications

(7 citation statements)

References 36 publications

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“…where l th is length from tip to root of the pole, s th is heat transfer cross-section area, and λ th = 20 is conduction heat transfer coefficient of stator pole [14]. Heat transfer from stator pole to air-gap occurs by forced convection.…”

Section: Stator Polementioning

confidence: 99%

“…where W cu is the thickness of coil from centre to slot insulation and λ av is the average conduction heat transfer coefficient of coil, which is considered between 0.6 and 0.9 due to heterogeneity of winding [14]. According to these cases, the new value of R 23 is modified as follows:…”

Section: Thermal Circuit For Stlsrmmentioning

confidence: 99%

“…In these equations, the thermal conductance G is calculated from common resistance between slot conductor and tooth from Equation () and R is thermal resistance from tip to root of pole, which is calculated as follows:

R=\frac{{l}_{th}}{{\lambda }_{th}{s}_{th}}

where l th is length from tip to root of the pole, s th is heat transfer cross‐section area, and λ th = 20 is conduction heat transfer coefficient of stator pole [14]. Heat transfer from stator pole to air‐gap occurs by forced convection.…”

Section: Thermal Modelling For Various Pieces Of Stlsrmmentioning

confidence: 99%

“…In this figure, thermal resistance R 23 old includes the conduction resistance of slot insulation and the convection resistance between insulation and tooth, which is calculated from Equation () and thermal resistances R a and R b are calculated from Equations () and () respectively. And:

{R}_{t}={R}_{a}+{R}_{b}=0.5R-0.17R

where the thermal resistance R is from middle of winding to slot insulation, considering the heterogeneity, and is calculated from the following equation:

R=\frac{0.5{W}_{cu}}{{\lambda }_{av}{s}_{cu}}

where W cu is the thickness of coil from centre to slot insulation and λ av is the average conduction heat transfer coefficient of coil, which is considered between 0.6 and 0.9 due to heterogeneity of winding [14]. According to these cases, the new value of R 23 is modified as follows:

{{R}_{23new}={R}_{23old}+R}_{t}

…”

Section: Thermal Modelling For Various Pieces Of Stlsrmmentioning

confidence: 99%

“…[13]. Thermal analysis of rotary SRMs has been widely performed and their results have been described [14][15][16][17][18][19][20]. Despite this, less attention has been paid to the thermal analysis of the LSRM.…”

Section: Introductionmentioning

confidence: 99%

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Lumped parameter thermal model for segmental translator linear switched reluctance motor

Golzarzadeh,

Oraee,

Ganji

2023

IET Electric Power Appl

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The segmental translator linear switched reluctance motor (STLSRM) is a special type of linear switched reluctance motor (LSRM) that has more output power than its conventional type. Therefore, it can be a good choice for certain applications. Heat is one of the factors limiting the output in machines. Therefore, predicting the thermal distribution of machine is as important as the magnetic design. A comprehensive thermal model is presented based on the lumped parameter approach for STLSRM, which predicts temperature distribution in different parts of this motor, including slot winding, end‐winding, stator pole, stator yoke, and the moving part. Considering that the proposed thermal model depends on dimensions and materials used in machine, it can be used for other designs of the STLSRM. The presented thermal model is applied to a typical STLSRM and temperature is determined in its different parts. The simulation results are then compared with the results of 3‐D thermal modelling based on the finite element method (FEM) for validation.

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Section: Stator Polementioning

confidence: 99%

Section: Thermal Circuit For Stlsrmmentioning

confidence: 99%

R=\frac{{l}_{th}}{{\lambda }_{th}{s}_{th}}

Section: Thermal Modelling For Various Pieces Of Stlsrmmentioning

confidence: 99%

{R}_{t}={R}_{a}+{R}_{b}=0.5R-0.17R

where the thermal resistance R is from middle of winding to slot insulation, considering the heterogeneity, and is calculated from the following equation:

R=\frac{0.5{W}_{cu}}{{\lambda }_{av}{s}_{cu}}

{{R}_{23new}={R}_{23old}+R}_{t}

…”

Section: Thermal Modelling For Various Pieces Of Stlsrmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Lumped parameter thermal model for segmental translator linear switched reluctance motor

Golzarzadeh,

Oraee,

Ganji

2023

IET Electric Power Appl

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Research on equivalent thermal network modeling for rare-earth giant magnetostrictive transducer

Zhang

Yang

2022

Sci Rep

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Of crucial importance for giant magnetostrictive transducers (GMTs) design is to quickly and accurately analysis the temperature distribution. With the advantages of low calculation cost and high accuracy, thermal network modelling has been developed for thermal analysis of GMT. However, the existing thermal models have their limits to describe these complicated thermal behaviors in the GMTs: most of researches focused on steady-state which is incapable of capturing temperature variances; the temperature distribution of giant magnetostrictive (GMM) rods is generally assumed to be uniform whereas the temperature gradient on the GMM rod is remarkable due to its poor thermal conductivity; the non-uniform distribution of GMM’s losses is seldom introduced into thermal model. Therefore, a transient equivalent thermal network (TETN) model of GMT is established in this paper, considering the aforementioned three aspects. Firstly, based on the structure and working principle of a longitudinal vibration GMT, thermal analysis was carried out. Following this, according to the heat transfer process of GMT, the TETN model was established and the corresponding model parameters were calculated. Finally, the accuracy of the TETN model for the temporal and spatial analysis of the transducer temperature are verified by simulation and experiment.

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Thermal modeling of the cylindrical electromagnets in transient and steady-state modes

Hashemi

Qaraei

Shabanian

2023

COMPEL

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Purpose An excessive increase in temperature will reduce the lifespan and even burn the coil. The variety of materials in the structure of the electromagnet along with its multi-layer winding creates a complex and heterogeneous thermal structure. There are very few researches that are completely focused on the thermal analysis of electromagnets. The purpose of this paper is to provide an accurate, yet fast and simple method for the thermal analysis of cylindrical electromagnets in both transient and steady-state modes. For this purpose, a thermal equivalent circuit (TEC) is presented based on the nodding approach. Design/methodology/approach The results of TEC analysis of cylindrical electromagnet, for two orthogonal and orthocyclic winding coil technologies, were compared with the results of the thermal simulation in COMSOL. The authors also built a laboratory model of the cylindrical electromagnet, similar to those analyzed and simulated, and measured the temperature in different parts of it. Findings The comparison of the results obtained from different methods for the thermal analysis of the cylindrical electromagnet indicates that the proposed TEC has an error of less than 2%. The simplicity and high accuracy of the results are the most important advantages of the proposed TEC. Originality/value Comparing the information and results related to winding schemes, indicates that the orthogonal winding has less cost and weight due to the shorter length of the wire used. On the other hand, orthocyclic winding generates lower temperature and has more lifting force, and is simpler to implement. Therefore, in practice, orthocyclic winding technology is usually used.

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Lumped thermal model for the multi‐layer switched reluctance motor

Cited by 10 publications

References 36 publications

Lumped parameter thermal model for segmental translator linear switched reluctance motor

Lumped parameter thermal model for segmental translator linear switched reluctance motor

Research on equivalent thermal network modeling for rare-earth giant magnetostrictive transducer

Thermal modeling of the cylindrical electromagnets in transient and steady-state modes

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