High-Fidelity Magnetic Equivalent Circuit Model for an Axisymmetric Electromagnetic Actuator

Batdorff, Mark A.; Lumkes, John

doi:10.1109/tmag.2009.2017531

Cited by 39 publications

(24 citation statements)

References 31 publications

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“…This result is justified considering the lower than desired number of turns achieved during the prototype manufacturing and the inaccurate analytical modelling used to describe the valve magnetic circuit. A revision of the magnetic model towards the development of an HFMEC (High Fidelity Magnetic Equivalent Circuit) [15] is currently under development.…”

Section: Resultsmentioning

confidence: 99%

Design and characterization of a soft magneto-rheological miniature shock absorber for a controllable variable stiffness sole

Grivon¹,

Civet²,

Pataky

et al. 2015

Archives of Electrical Engineering

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Abstract:The proposed paper discusses the design and characterization of a soft minia ture Magneto-Rheological (MR) shock absorber. In particular, the final application con sidered for the insertion of the designed devices is a controllable variable stiffness sole for patients with foot neuropathy. Such application imposes particularly challenging con straints in terms of miniaturization (cross-sectional area #1.5 cm 2 , height # 25 mm) and high sustainable loads (normal loads up to 60 N and shear stresses at the foot/device interface up to 80 kPa) while ensuring moderate to low level of power consumption. Initial design considerations are done to introduce and justify the chosen novel configu ration of soft shock absorber embedding a MR valve as the core control element. Suc cessively, the dimensioning of two different MR valves typologies is discussed. In par ticular, for each configuration two design scenarios are evaluated and consequently two sets of valves satisfying different specifications are manufactured. The obtained proto types result in miniature modules (external diam. # 15 mm, overall height # 30 mm) with low power consumption (from a minimum of 63 mW to a max. of 110 mW) and able to sustain a load up to 65 N. Finally, experimental sessions are performed to test the behaviour of the realized shock absorbers and results are presented.

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Section: Resultsmentioning

confidence: 99%

Design and characterization of a soft magneto-rheological miniature shock absorber for a controllable variable stiffness sole

Grivon¹,

Civet²,

Pataky

et al. 2015

Archives of Electrical Engineering

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“…To allow the magnetic circuit to directly interface with the electrical circuit, the duality principle was applied to the magnetic circuit. The basic concepts of the duality principle are summarized here: loops (nodes), permeances, and windings are replaced by nodes (loops), inductances, and ideal transformers, respectively [27]. Figure 2(a) depicts the lines passing each permeance, which is inductance in the electrical model.…”

Section: Magnet Core Representationmentioning

confidence: 99%

“…However, EMTP does not allow solving a magnetic circuit directly. For this reason, the electric equivalent circuit of a contactor is derived using the duality principle introduced in [27]. The duality principle allows core permeances in the magnetic circuit to become inductances in the electric circuit.…”

Section: Introductionmentioning

confidence: 99%

An improved AC electromagnetic contactor model based on EMTP

Saengsuwan

2017

IEEJ Transactions Elec Engng

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This paper presents a new simulation approach of an AC electromagnetic contactor based on the Electromagnetic Transient Program (EMTP). To decouple the simulation from the magnetic circuit, the duality transformation technique is applied to transform the magnetic model into an electrical model. With this technique, the solutions of the proposed model are only on electric circuit, and model can interface directly with the surrounding components in EMTP. To enhance the model precision, both saturation and fringing flux effects are taken into account. Additionally, the estimation of general unknown parameters, namely shading ring resistance and load force, is proposed. The performance and accuracy of the proposed model are verified by comparing with finite element method (FEM) results and experiments. Finally, the model is applied for the case study of the sensitivity of a contactor during voltage sag. The results demonstrate good performance of the proposed model, and the approach can be further extended to other electromagnetic devices.

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“…Empirical equations are therefore often used as follows [22]: (8) where is the conduction coefficient of the conduction oil, is the Nusselt number, is the Rayleigh number and is the Prandtl number. The dimensions of the valve are shown in Fig.…”

Section: A Thermal Modelmentioning

confidence: 99%

“…The experimental results show that FEA method is precise enough; however, it requires a large amount of computation when the method is used to optimize electromagnetic devices [2]- [7]. Magnetic equivalent circuit (MEC) method may have some error when predicting electromagnetic force and magnetic flux [8]. However, the MEC model is excellent when it is used to optimize and design electromagnetic devices [9]- [14].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Submersible Solenoid Valves for Subsea Blowout Preventers

Cai

Tian

et al. 2011

IEEE Trans. Magn.

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An analytical optimization approach of the submersible solenoid valve constrained in a specific small volume is presented. In order to maximum the electromagnetic force, thermal model and electromagnetic model are constructed, and five radial dimensions are optimized when the main limiting quantity is the maximum allowed temperature. A numerical optimization calculation is performed in order to verify the proposed analytical approach. The optimal solution of the numerical calculation is compared with the solution of the analytical approach, which shows a good agreement between the two methods. A thermal analysis of the optimal submersible solenoid valve based on AYSYS is also performed to verify the thermal model. A comparative study between the experimental and simulated static characteristics of the optimal submersible solenoid valve is also performed. The results show that the proposed analytical approach is correct.

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High-Fidelity Magnetic Equivalent Circuit Model for an Axisymmetric Electromagnetic Actuator

Cited by 39 publications

References 31 publications

Design and characterization of a soft magneto-rheological miniature shock absorber for a controllable variable stiffness sole

Design and characterization of a soft magneto-rheological miniature shock absorber for a controllable variable stiffness sole

An improved AC electromagnetic contactor model based on EMTP

Optimization of Submersible Solenoid Valves for Subsea Blowout Preventers

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