Improvement of Operating Characteristics for MC-LOA Taking Account of Permanent Magnet Arrangement

Kim, Duk-Hyun; Lee, Dong-Yeup; Jung, Chun-Gil; Kim, Gyu-Tak

doi:10.1109/tmag.2004.832506

Cited by 8 publications

(2 citation statements)

References 2 publications

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“…They are widely utilised in hard disc drive [8], ultrasound scanner [9], mobile phone [10], robot arm [11], camera lens [12], and other driving systems. Various types of LVCM have been developed and lots of efforts on designing the structure of LVCMs have been done [13][14][15][16]. These designs involve improving average thrust density of LVCMs.…”

Section: Introductionmentioning

confidence: 99%

Design of linear voice coil motor with semi‐closed structure

Luo

Lin

Sun

2019

IET Electric Power Applications

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A Halbach permanent magnet (PM) tubular linear voice coil motor (LVCM) with a semi-closed structure is developed to enhance the thrust density in this study. Generally, the end of conventional LVCM is open and suffers from the considerable end reluctance. The usage of Halbach array in LVCM makes this problem more prominent although it improves the air-gap flux density greatly. The flux at the end of LVCM can be guided to improve the air-gap flux density. Therefore, this study aims to constrain and direct the magnetic field at the end of a Halbach PM LVCM by using a ferromagnetic auxiliary yoke to construct a semi-closed structure. Magnetic equivalent circuit method is utilised to analyse the effect of the auxiliary yoke on air-gap flux density. Besides, finite element analysis is used to analyse the magnetic circuit and design the parameters of LVCM. The semiclosed tubular LVCM topology is manufactured and the effectiveness of this topology is validated by experimental measurements. Results show that the thrust density of LVCM is improved effectively by using an auxiliary yoke at the end.

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Section: Introductionmentioning

confidence: 99%

Design of linear voice coil motor with semi‐closed structure

Luo

Lin

Sun

2019

IET Electric Power Applications

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“…moving-coil, moving-magnet and moving-iron. Moving-coil type has the virtue of light mover's weight, small inertia, good dynamic performance, small structure and easily controlled, however, it is easily to be broken for coil's connection, so is not suitable for highfrequency oscillatory occasion [4]. Moving-magnet motors with the advantage of compact structure, high oscillatory frequency [5][6][7], but the PM's support requires to use the non-magneticconductivity and non-electrical-conductivity material, the mechanical strength of PM and the oscillation resistance property needs high demanding and processing costs.…”

Section: Introductionmentioning

confidence: 99%

Research on the Mathematics Model of a Permanent Magnet Linear Oscillatory Actuator with Moving Iron and Non-Salient Pole

Pan

Wang

Xia

et al. 2012

AMR

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A novel permanent magnet (PM) linear oscillatory actuator (LOA) of moving-iron and non-salient pole was presented on the basis of LOA research. The mathematical model of the LOA based on the magnetic circuit method was established, and derived the relationship between electromagnetic thrust and coil current, mover’s displacement. The thrust of LOA was simulated by the Finite Element Method (FEM). The corresponding experimental results verifies the electromagnetic thrust is direct proportional to coil current and reverse proportional to mover’s displacement during effective mover’s displacement. So the derived mathematical model based on the magnetic circuit method is correct. This conclusion provides a theoretical basis for the further calculation of thrust, the selection of control current and the design of controlling method.

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