Analysis of the Vibration Characteristics of Coaxial Magnetic Gear

Lee, Jiyoung; Chang, Junghwan

doi:10.1109/tmag.2017.2665660

Cited by 12 publications

(3 citation statements)

References 6 publications

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“…Although noncontact gear structures that transmit energy and speed through magnetic fields generated by PMs can avoid vibration caused by friction, vibration can still be generated by electromagnetic forces acting on the magnetic gear components [18]. In order to avoid vibration or even resonance causing significant damage to the EHMG, it is necessary to conduct modal analysis to obtain modal shapes and natural frequencies.…”

Section: Introductionmentioning

confidence: 99%

Characteristic Analysis of a New Structure Eccentric Harmonic Magnetic Gear

Jing

Wang

et al. 2023

Actuators

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An eccentric harmonic magnetic gear (EHMG) is better suited for situations requiring larger transmission ratios than magnetic-field-modulated magnetic gears. In the meantime, to increase the torque density even further, a new structure for EHMGs is presented in this paper. The stator’s permanent magnets (PMs) are irregularly distributed, while the rotor’s PMs are applied to a fan-shaped structure. Moreover, a Halbach array is adopted in both the rotor and the stator. A two-dimensional finite element (FE) model of the proposed EHMG is developed, and the flux density distribution and torque of the EHMG are calculated and verified via FE analysis. When compared to a conventional EHMG, the presented model’s torque increases from 38.04 Nm to 50.41 Nm. In addition, for the sake of avoiding the oscillation and noise caused by resonance, a modal analysis of the proposed model is conducted and the consequences show that it has better antivibration properties. Finally, a prototype is made, a test bench is established, and the correctness and effectiveness of the proposed model are verified.

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Section: Introductionmentioning

confidence: 99%

Characteristic Analysis of a New Structure Eccentric Harmonic Magnetic Gear

Jing

Wang

et al. 2023

Actuators

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“…The natural frequencies of the inner rotor and the outer rotor of the permanent magnet motor were carried out respectively by the finite element calculation and test [13,14]. The vibration characteristics of the PMSM were studied in [15,16]. Reference [15] researched the vibration and noise characteristics of the coaxial magnetic gear by the electromagnetic forces, and [16] noted that when the order and frequency of the electromagnetic force and the natural frequency of the motor are accordant will lead to motor resonance.…”

Section: Introductionmentioning

confidence: 99%

“…The vibration characteristics of the PMSM were studied in [15,16]. Reference [15] researched the vibration and noise characteristics of the coaxial magnetic gear by the electromagnetic forces, and [16] noted that when the order and frequency of the electromagnetic force and the natural frequency of the motor are accordant will lead to motor resonance. The methodologies to reduce vibration were studied in [17][18][19] and [20].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Modal and Vibration Reduction of an Interior Permanent Magnet Synchronous Motor

Xie

Xia

et al. 2019

Energies

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Interior permanent magnet synchronous motors (IPMSMs) have been widely used in a variety of applications. The IPMSM will generate vibration as well as functioning like other traditional motors, which will affect the performance and the durability of the motor itself. The modal and vibration characteristics of the IPMSM and an optimization design to reduce vibration are researched in this paper. The formulas of electromagnetic force are deduced and analyzed, and a finite element model is established. The model is used for modal calculation, and the low order natural frequency is obtained. Then, the modal test is carried out by the hammering method, and the resonance frequency is found by analyzing the results. Eventually, the electromagnetic vibration is analyzed by taking the electromagnetic force as the load condition, the vibration displacement waveform is obtained, and the correctness of the dynamic calculation is verified by vibration tests. In addition, an eccentric tooth edge design is proposed to weaken the dominant radial electromagnetic force and the vibration displacement is compared with the designed prototype. This design method, which could help to reduce the vibration and noise of the IPMSM, has great potential in future applications.

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Dynamic Analysis of Surface-Mounted Permanent Magnet Type Coaxial Magnetic Gear With Damper Bar Considering Magnetic Field Modulation Effect

Shin

Chang

2022

IEEE Access

Self Cite

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Coaxial Magnetic Gear (CMG) has unstable dynamic characteristics by hunting or pull-out action of the output rotor when the load or speed are changed, unlike traditional mechanical gears. These dynamic characteristics need to be improved in order to secure the reliability of mechanical power transmission system by fast and accurate response. In this paper, the damper bar used in synchronous machines is considered as a method to improve the dynamic characteristics of CMG. The Surface-mounted Permanent Magnet (SPM) type CMG is selected as the analysis model. The space harmonics of the magnetic flux density of stationary and rotary members of CMG namely, modulating pieces, inner and outer rotor, are analyzed and characterized the influence of them on the improvement of dynamic characteristics as well as torque reduction. Also, the magnetic flux density characteristics and the damping effect are compared according to the position of the damper bars on two rotors and the modulating pieces. In conclusion, the considerations about the perspective for design and application are presented when using the damper bar for SPM type CMG.INDEX TERMS Coaxial magnetic gear, damper bar, dynamic analysis, magnetic field modulation effect, space harmonics.

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Analysis of the Vibration Characteristics of Coaxial Magnetic Gear

Cited by 12 publications

References 6 publications

Characteristic Analysis of a New Structure Eccentric Harmonic Magnetic Gear

Characteristic Analysis of a New Structure Eccentric Harmonic Magnetic Gear

Analysis of Modal and Vibration Reduction of an Interior Permanent Magnet Synchronous Motor

Dynamic Analysis of Surface-Mounted Permanent Magnet Type Coaxial Magnetic Gear With Damper Bar Considering Magnetic Field Modulation Effect

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