Micro thermal design of swing arm type small form factor optical pick-up system

Lee, Jee-Na; Kim, Hongmin; Kim, Young-Joo; Kang, Shinill

doi:10.1007/s00542-006-0231-y

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…As explained above, the actuator suspension has a form of laminated structure and each of the layers has the dimension as in Table 2. The initial pick-up mass is supposed as 29 mg considering previous pick-up examples (Lee et al 2006). By the finite element (FE) analysis, the initial design is confirmed to have 15.8 kHz torsional frequency and the DC-sensitivity for focusing as 0.328 mm/V; both satisfy the design requirements.…”

Section: Design Requirementsmentioning

confidence: 98%

“…Furthermore, the heat transfer of hard disk drive (HDD) rotating disk is researched by Cho et al (2003). Recently, Lee et al (2006) suggested a micro thermal design of a swing arm type SFF optical pick up system; however, the design is only concerned about the thermal characteristics from heat emission from optical pick up unit without dynamic consideration and the convection coefficient is assumed without verifications.…”

Section: Introductionmentioning

confidence: 99%

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Design of swing arm type actuators considering thermal and dynamic characteristics

et al. 2006

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The present state of the design of swing arm actuators for optical disc drives is to obtain the highly efficient dynamic characteristics within a very compact volume. As a necessary consequence, the need of the small form factor (SFF) storage device has arisen as a major interest in the information storage technology. Due to the size constraint, the thermal stability of the optical pick-up head is important: therefore, the actuator is designed to emit the heat, which is generated by the optical pick-up, along the structural body easily. In this paper, we suggest the miniaturized swing arm type actuator that has effective heat emission quality as well as satisfies the dynamic requirements for the SFF optical disk drive (ODD). The actuator is targeted to be installed in CF-II card size drive to be competitive with flash memory or mini hard disk drive used in mobile electric devices; therefore the dimension of the actuator is required as 11.0 mm · 2.5 mm · 25.0 mm (width · height · length). Because of its small size, the dynamic requirements are severe to ensure the enough gain-margin for the system control together with satisfying the DC/AC sensitivity conditions. Moreover, due to the small size, the maximum pick-up temperature is critical in design because the system has high possibility to reach the shut-down temperature. For the operating mechanism, it uses a tracking electromagnetic (EM) circuit for the focusing motion together and the initial model is designed and promoted by the design of experiments (DOE) only considering the dynamic characteristics. New concept design is suggested based on the topology optimization method considering the thermal conductivity. Furthermore, the new design is modified by DOE to maintain the high sensitivity and to have wide control bandwidth and decreasing mass and inertia. The final design of a swing arm type actuator for SFF ODD is suggested and its dynamic characteristics are verified.

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Section: Design Requirementsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Design of swing arm type actuators considering thermal and dynamic characteristics

et al. 2006

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Introduction

2012

Micro/Nano Replication

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Design of the rotary VCM actuator for small form factor optical disk drive

et al. 2009

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In this paper, the rotary VCM actuator for small form factor (SFF) optical disk drive (ODD) is designed. The rotary VCM actuator needs high driving sensitivity, sufficient structural stiffness and thermal stability. These three performances are closely connected, so the coupledfield analysis of three kinds of physics is established. In order to establish thermal analysis model, the heat generated from voice coils is analyzed and convection heat transfer coefficient of the rotary VCM actuator is defined by thermal experiment. Overall performance which consists of driving performance, structural stiffness and thermal stability is optimized through design of experiments (DOE) and optimization procedures. At last, optimized actuator is confirmed that it can satisfy all specifications: size, driving performance, structural stiffness and thermal stability.

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Micro thermal design of swing arm type small form factor optical pick-up system

Cited by 4 publications

References 8 publications

Design of swing arm type actuators considering thermal and dynamic characteristics

Design of swing arm type actuators considering thermal and dynamic characteristics

Introduction

Design of the rotary VCM actuator for small form factor optical disk drive

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