Characteristic analysis of a traveling wave ultrasonic motor using an ellipsoidal static contact model

Lim, Jung Pil; Rho, Jong Seok; Yi, Kyung Pyo; Seo, Jung Moo; Jung, Hyuk-Sang

doi:10.1088/0964-1726/18/11/115024

Cited by 16 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where B mg and B r are the magnetic flux and residual flux densities, respectively. The number of magnet poles is determined using equation (2) [29]- [31]:…”

Section: Design Methods For the Conventional And Proposed Afpmsmsmentioning

confidence: 99%

Design and Analysis of a 4-kW Two-Stack Coreless Axial Flux Permanent Magnet Synchronous Machine for Low-Speed Applications

Khan

Bukhari

2019

IEEE Access

View full text Add to dashboard Cite

This paper presents a comparative performance analysis of 4-kW axial flux permanent magnet synchronous machines (AFPMSMs) with and without a rotor core. The present study is intended for lowspeed applications; however, the investigated machines are designed using an improved diameter-to-length method and their comparative performance is assessed using comprehensive electromagnetic finite element analysis. The results of this analysis suggest that the proposed coreless topology has the advantages of higher output power, higher efficiency, and lower iron or core losses compared to the conventional iron core AFPMSM.

show abstract

“…where B mg and B r are the magnetic flux and residual flux densities, respectively. The number of magnet poles is determined using equation (2) [29]- [31]:…”

Section: Design Methods For the Conventional And Proposed Afpmsmsmentioning

confidence: 99%

Design and Analysis of a 4-kW Two-Stack Coreless Axial Flux Permanent Magnet Synchronous Machine for Low-Speed Applications

Khan

Bukhari

2019

IEEE Access

View full text Add to dashboard Cite

show abstract

“…During piezoelectric coupling, electrical energy is converted to high-frequency mechanical vibration and during frictional coupling, the mechanical vibration is converted to the revolution of rotor. 9,19 However, the explanation of energy conversion is rough and not enough to explain the test results. The energy transfer process should be discussed.…”

Section: Energy Transfer Process In Twusmmentioning

confidence: 99%

Mechanical and electrical characteristics of traveling wave ultrasonic motors during the whole life of friction material

Zhang

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

It is difficult to evaluate the characteristics of traveling wave ultrasonic motors (TWUSMs) during the whole life of friction material (FM) because the wear of FM is quite slow. To solve this problem, an accelerated life test method was proposed and the mechanical and electrical characteristics of TWUSMs in the whole life of FM were analyzed systematically. The results show that the mechanical characteristics including speed and efficiency have a decline trend after an ascent with the increase of FM thickness, especially when the load torque is great. When the load torque is greater than 0.4 Nm, the optimum range of FM thickness is 0.10-0.20 mm. When the residual FM thickness is less than 0.17 mm, holding torque is greater than stall torque. Electrical characteristics of TWUSM show monotonicity in the whole life of FM. Therefore, the variations of electrical characteristics could be the wear indicator of FM. Based on experiment analysis, mechanism of interactions and couplings in the energy transfer process of the TWUSM system was explored. The energy transfer process of TWUSM was divided into four subprocesses. The wear of FM is in the intermediate subprocess, which has influence on both output performance and drive circuit of TWUSM. The four subprocesses interact and couple with each other closely. Consequently, the mechanical part and electrical part of TWUSM should be not isolated, and not only the forward action, but also the backward action in energy transfer process should be considered for a more realistic theoretical model of TWUSM.

show abstract

“…The magnetic vector potential, A (Wb/m 2 ), can be calculated by solving (1) by the FEM while applying the boundary condition [20][21][22][23] ∇×n ∇× A = J 0 +∇× nm 0 M…”

Section: Analysis Of the Magneto-static Fieldmentioning

confidence: 99%

“…The magnetic vector potential,

\vec{A}

(Wb/m 2 ), can be calculated by solving (1) by the FEM while applying the boundary condition [20–23]

\nabla \times ν ()(, \nabla \times \vec{A}) = \vec{J_{0}} + \nabla \times ()(, ν μ_{0} \vec{M})

which is subject to

ν = {(μ_{0} μ_{normalr})}^{- 1} = {\{μ_{0} (1 + χ_{normalm})\}}^{- 1}

where v (m/H) is the reluctivity,

\vec{J_{0}}

(A/m 2 ) is the external current density vector, μ 0 (H/m) is the permeability of the free space,

\vec{M}

(A/m) is the residual magnetisation vector, and χ m is the magnetic susceptibility.…”

Section: Analysis and Design Of The Spmamentioning

confidence: 99%

Characteristic analysis and design of a novel permanent magnetic actuator for a vacuum circuit breaker

Hong²,

Jung

2013

IET Electric Power Applications

View full text Add to dashboard Cite

In this study, a novel permanent magnetic actuator (PMA) termed a separated permanent magnetic actuator (SPMA) is proposed. The efficiency of the proposed SPMA is significantly higher than a conventional PMA because of its innovative structure, with which the magnetic flux path is efficient and the holding forces can be designed independently taking the unique values of each load into consideration. Hence, the SPMA is smaller in size and lower in cost than the conventional PMA. For the SPMA, a characteristic analysis and design method using a two-dimensional finite element method, an equivalent circuit, an equation of motion and a time difference method is suggested in this study to save time and reduce the costs incurred because of the experimental trial and error deign. The SPMA was designed and prototyped such that the usefulness of the SPMA for application to a vacuum circuit breaker and the reasonableness of the suggested characteristic analysis and design method were confirmed by the experimental data.

show abstract

Characteristic analysis of a traveling wave ultrasonic motor using an ellipsoidal static contact model

Cited by 16 publications

References 37 publications

Design and Analysis of a 4-kW Two-Stack Coreless Axial Flux Permanent Magnet Synchronous Machine for Low-Speed Applications

Design and Analysis of a 4-kW Two-Stack Coreless Axial Flux Permanent Magnet Synchronous Machine for Low-Speed Applications

Mechanical and electrical characteristics of traveling wave ultrasonic motors during the whole life of friction material

Characteristic analysis and design of a novel permanent magnetic actuator for a vacuum circuit breaker

Contact Info

Product

Resources

About