A Comparison of Velocity Skin Effect Modeling With 2-D Transient and 3-D Quasi-Transient Finite Element Methods

Tosun, Nail; Ceylan, Doğa; Polat, Hakan; Keysan, Ozan

doi:10.1109/tps.2021.3067105

Cited by 15 publications

(8 citation statements)

References 15 publications

(22 reference statements)

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“…However, the F pr is not the only force that acts on the armature. Friction and drag forces, denoted as F f ric and F drag slow down the movement as in (7). F f ric can be modelled as in ( 8) [21] where µ d and µ s are dynamic and static friction coefficients respectively.…”

Section: ) Kinemechanical Calculationsmentioning

confidence: 99%

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A Revised Inductance Distribution Analysis of Medium-Large Caliber Electromagnetic Launchers including a Large Bus Structure

Tosun¹,

Keysan²

2023

Preprint

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<div>Simulations are crucial in the electromagnetic launcher (EML) researches on account of extreme physical conditions. More energy into the system adds weight to the model’s accuracy as the operation risk rises. In this paper, the electromagnetic impact of the bus structure is discovered in a recently developed EMFY-3 electromagnetic launcher, is presented. An H-shaped bus structure is used for current injection. However, experiments showed that the H-shaped bus changes inductance calculations. A careful examination is made to reveal the physical reasoning of the bus impact. We hypothesize that the rail portion surrounded with bus geometry has less inductance than the rest due to the eddy current created by rail current transients, which should be calculated carefully through numerical calculations, i.e., 3-D Finite Element Method (FEM). Two different simulation models were constructed to test the hypothesis. Moreover, rail currents, breech, and muzzle voltages are measured to investigate electromagnetic calculations. Results showed a good agreement with experiments where the bus structure was modeled explicitly. That aspect showed that the bus structure should be well-examined when multiple PPS are connected.</div>

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Section: ) Kinemechanical Calculationsmentioning

confidence: 99%

“…3) FEM-assisted lumped circuit method This strategy middle way between pLCM and pFEM; thus, it can be called a hybrid method. For example, the computational load of the pFEM can be diminished by a co-simulated LCM which covers the effect of the movement [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

A Revised Inductance Distribution Analysis of Medium-Large Caliber Electromagnetic Launchers including a Large Bus Structure

Tosun¹,

Keysan²

2023

Preprint

Self Cite

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“…Many applications involve 2D and 3D both analyses to justify the quality of results. In [9], to observe the velocity skin effect on electromagnetic launchers, 2D and 3D finite element methods (FEM) is utilized. Similarly, observation of the quasi 3D model of IMs was performed in [10].…”

Section: Introductionmentioning

confidence: 99%

A 2D and 3D Analysis on Electromagnetic Parameters of Spoke-shape Interior Permanent Magnet Synchronous Motor Using FEM

Naik

Bag

Chandrasekaran

2023

Period. Polytech. Elec. Eng. Comp. Sci.

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In industry, the most frequently used motors are induction motors (IMs), reluctance motors, and permanent magnet synchronous machines (PMSMs). Nowadays because of higher efficiency with higher power density, PMSM attracts its uses in every field of application. Hence, a spoke shape interior PM-based synchronous motor (IPMSM) with distributed winding is considered to discuss in this paper. Also, there has always been a dispute between 2D and 3D analysis of electromagnetic parameters of machines. Therefore, this paper discusses the accuracy, advantages, and difficulty level of 2D and 3D FEM analysis of the IPM motor model by considering several electromagnetic with electromechanical parameters such as torque, flux linkage, eddy current loss, etc. The performance of five different core materials is also considered for comparison. These analyses are carried out by using ANSYS Maxwell software. Spoke shape IPMSM of 0.55 kW with 220 V, 50 Hz is considered for analysis. The 2D and 3D comparison results of parameters under magnetostatic and transient conditions are presented and verified with the results reported in the literature. 2D FEM analysis has given more value in case of torque, stator current, and magnetic flux density than 3D analysis where as 3D analysis is give good performance for flux linkage, back EMF, and eddy current losses. Significant percentage changes with respect to observed materials in the results of 2D and 3D cases are reported. Silicon Steel M36 suitability for stator and rotor core is also observed. This 2D and 3D FEM analysis clarifies accuracy prior to design motor.

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“…EMFY-2 is built in the laboratory, an 8-MJ PPS system, a flash X-ray system, a 6-m-long catch tank, and diagnostic tools [5]. These two EMLs are used to improve electromagnetic analysis in terms of transient EMF calculations [6], and velocity skin effect (VSE) analysis [7].…”

Section: Introductionmentioning

confidence: 99%

Inductance Gradient Calculations of EMFY-3 Electromagnetic Launcher

Tosun¹,

Keysan²

2021

Preprint

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<div>ASELSAN Inc. has been working on electromagnetic launch technologies since 2014. The first prototype, EMFY-1, has a 25 mm × 25 mm square bore and 3-m-length rails. The second prototype, EMFY-2, has a 50 × 50 mm square bore and 3-m-length. In this paper, a recently developed prototype, EMFY-3, is presented, which has a 50 × 75 mm rectangular bore and 6-m-length. The input energy of the PPS is doubled to 8 MJ, and the 2.91 MJ muzzle energy is obtained up to now. Rail currents, breech, and muzzle voltages are measured to investigate electromagnetic calculations. Velocity curves are captured with Doppler radar, which enables us to establish propulsive inductance gradient L0pr transients empirically. The results confirm that L0 pr is constant throughout the launch, as no significant breaking mechanism occurs with the non-magnetic containment. However, a slight variation (%2 at maximum) happens from one launch to another with different rails’ current magnitudes. The transition phenomenon is a candidate for the drop in the L0 pr, as it occurs more likely at launches with higher linear current densities.</div>

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A Comparison of Velocity Skin Effect Modeling With 2-D Transient and 3-D Quasi-Transient Finite Element Methods

Cited by 15 publications

References 15 publications

A Revised Inductance Distribution Analysis of Medium-Large Caliber Electromagnetic Launchers including a Large Bus Structure

A Revised Inductance Distribution Analysis of Medium-Large Caliber Electromagnetic Launchers including a Large Bus Structure

A 2D and 3D Analysis on Electromagnetic Parameters of Spoke-shape Interior Permanent Magnet Synchronous Motor Using FEM

Inductance Gradient Calculations of EMFY-3 Electromagnetic Launcher

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