Analysis of a Vibrating Motor Considering Electrical, Magnetic, and Mechanical Coupling Effect

Kim, Jun-Hyung; Jiang, Yuan-Wu; Hwang, Sang-Moon

doi:10.3390/app9071434

Cited by 11 publications

(6 citation statements)

References 10 publications

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“…Saraswat and Tiwari [24] studied the electromagnetic-mechanical coupling in electrodynamic shakers. Kim et al [25] introduced an electrical, magnetic, and mechanical coupling analysis method in vibrating motors. Jiang et al [26] used the electromagnetic-mechanical-acoustic coupling method and resonance equations to study the sound pressure level and peak frequencies in micro-speakers.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic-mechanical coupling analysis and optimization method of electromagnetic vibroseis

Chen

Xing

Sun

et al. 2023

Meas. Sci. Technol.

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Electromagnetic vibroseis is an important seismic wave excitation device. At present, the research of electromagnetic vibroseis mainly focuses on application and prototype design, lacking research on electromagnetic-mechanical coupling. Analyzing the electromagnetic-mechanical coupling and optimizing the air gap magnetic field is of great significance to improve the excitation quality of low-frequency seismic waves. In this paper, the electromagnetic-mechanical coupling is analyzed by studying the parameter force factor, and two novel optimal designs of the air gap magnetic field are proposed. Firstly, the finite element model of the air gap magnetic field is established, and the influence of the force factor distribution curve on the vibration signal is analyzed by using the Gaussian function and parameter spline difference (PSD) method. Further, an asymmetrical axial dual-magnet design is proposed to enhance the radial magnetic induction intensity Βr in the air gap. The design of adding a radial magnet to the outer yoke is proposed to compensate for the nonlinearity of the Βr in the air gap. The simulation results show that the asymmetric axial dual-magnet structure increases the Βr by 22.2% compared with the axial single-magnet structure. Adding a radial magnet to the outer yoke reduces the amplitude ratio of the third harmonic to the fundamental wave from 23.24% to 4.66%. It is necessary to consider the influence of the height of the driving coils on the maximum displacement, force factor distribution curve, and harmonic distortion.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic-mechanical coupling analysis and optimization method of electromagnetic vibroseis

Chen

Xing

Sun

et al. 2023

Meas. Sci. Technol.

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“…For the coupling analysis, nonlinear parameters including inductance and speedance was considered. The electrical, magnetic, and mechanical coupling effects of vibrating motor are solved by considering nonlinear parameters with FEM and numerical iteration method [4].…”

Section: Introductionmentioning

confidence: 99%

Development of Direct-Vibration Actuator for Bezel-Less Display Panels on Mobile Phones

Park

Jiang

et al. 2020

Applied Sciences

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With the development of technology, multimedia devices such as smartphones, tablets, and wearable devices have become necessities in our lives, and many new products are introduced every year. Companies are expanding smartphone displays and are developing bezel-less display panel designs. The enlarged display limits the space available for a speaker, and a new actuator must therefore be developed. Indirect-vibration actuators were developed for full-wide display designs. Using the same sound-generation principle as that of the indirect-vibration actuator, the mechanism and design of the direct-vibrating actuator is proposed in this paper. Using 3D finite element method (FEM), the force factor is obtained and used for design optimization. A sample is produced, and an experiment is conducted for sound pressure level (SPL) comparison. The experiment results show that the newly designed direct-vibration actuator can replace the dynamic receiver in mobile devices and enable the application of the bezel-less display design.

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“…It is therefore necessary to reduce the magnetic flux leakage while maintaining the same performance. The motor performance requirements were decided by previous research [7,8] with consideration for the human mechanoreceptors that are the nerve endings in the skin responsible for sensitivity to vibration and pressure [9]. The maximum displacement of a linear vibration motor is around 0.4 mm, and the range of resonance frequency is from 138 Hz to 150 Hz, while the working frequency is from 50 Hz to 500 Hz, and the electrical resistance is around 8 ohms.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of a New Linear Vibration Motor Used to Reduce Magnetic Flux Leakage in In-Vehicle Infotainment

et al. 2020

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Linear vibration motors are becoming more popular for use in haptic applications owing to their better performance. However, a permanent magnet with a large volume causes massive magnetic flux leakage, which can be harmful to passengers with a cardiac pacemaker or an implantable-cardioverter defibrillator. The magnetic flux leakage is calculated using the 3D finite element method, which can also be applied to obtain the force factor. Then, the displacement and impedance are obtained to check the performance of the linear vibration motor by utilizing the finite element method. A prototype of a linear vibration motor is analyzed and verified based on the experimental results. Based on the analysis methods, three new designs are proposed to reduce the magnetic flux leakage to within 50 G. The final design shows a 93.07% reduction of the magnetic flux leakage while maintaining the same performance as the prototype. To verify the validity of the analysis results, three experimental results were obtained: the magnetic flux leakage, displacement, and impedance. The experimental results are in good agreement with the analysis results.

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Analysis of a Vibrating Motor Considering Electrical, Magnetic, and Mechanical Coupling Effect

Cited by 11 publications

References 10 publications

Electromagnetic-mechanical coupling analysis and optimization method of electromagnetic vibroseis

Electromagnetic-mechanical coupling analysis and optimization method of electromagnetic vibroseis

Development of Direct-Vibration Actuator for Bezel-Less Display Panels on Mobile Phones

Analysis and Design of a New Linear Vibration Motor Used to Reduce Magnetic Flux Leakage in In-Vehicle Infotainment

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