Design Modifications to Improve the Antishock Performance of a Stamped Base for a 2.5-in HDD

Lim, Geonyup; Kim, Seokhwan; Park, No Cheol; Park, Kyoung Su; Kim, Ju Ho

doi:10.1109/tmag.2014.2298410

Cited by 14 publications

(4 citation statements)

References 2 publications

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“…The permanent magnet linear synchronous motor (PMLSM) is widely applied in long-distance automatic transportation systems because of its advantages of high-speed precision, strong reliability, fast response and great power density [1][2][3]. In general, the PMLSM is designed with a long stationary primary stator and a moving secondary actuator.…”

Section: Introductionmentioning

confidence: 99%

Speed Control of Segmented PMLSM Based on Improved SMC and Speed Compensation Model

et al. 2020

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A segmented control model including an improved sliding model control (SMC) and a speed compensation model is applied into the speed control of a segmented permanent magnet linear synchronous motor (PMLSM) to improve the speed precision during the drive process and reduce the speed loss during the switch process. During the drive process of segmented PMLSM, an improved SMC with a disturbance observer (DOB) is used to suppress the speed fluctuation, and a DOB is added to suppress the oscillation caused by the switch part of SMC. During the switch process of a segmented PMLSM, a speed compensation model based on the position feedback of permanent magnet (PM) actuator is designed to reduce the speed loss of a segmented PMLSM, so the speed of PM actuator could be kept at the reference speed when the PM actuator absolutely quits the stator windings. Finally, the simulation and experiment are conducted to verify the control performances of proposed control model, the results indicate that the speed fluctuation of PM actuator and the speed loss during the switch process are mitigated. Therefore, this proposed control model could satisfy requirements of high-stability and celerity of segmented PMLSM in a long-distance automatic transportation system.

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Section: Introductionmentioning

confidence: 99%

Speed Control of Segmented PMLSM Based on Improved SMC and Speed Compensation Model

et al. 2020

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“…However, FEMs require a large amount of calculation time. To address this disadvantage, Reference [10] proposed a multilayer theory to analyze a smooth solid rotor induction motor. Reference [11] provided a novel multi-slice and multi-layer method for a novel dual stator solid rotor axial flux induction motor.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Circuit Model of Novel Solid Rotor Induction Motor with Toroidal Winding Applying Composite Multilayer Theory

Feng

et al. 2019

Applied Sciences

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In this work, a novel solid rotor induction motor with toroidal winding (N-TWSRIM) is proposed and its structure and main structural parameters are given. The operating principle is analyzed in accordance with the movement of the armature magnetic field at different times. An equivalent circuit model (ECM) of the N-TWSRIM is established based on composite multilayer theory to analyze and calculate motor performance quickly and accurately. Electromagnetic performance, which includes output torque, stator current, and power factor under different slip, is calculated with ECM, and its results are compared with those of the finite element method. A prototype of the N-TWSRIM is built and experimented on to validate the correctness of the operating principle and ECM. Experimental results on stator current and torque are consistent with the finite element and analytical results.

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“…Their experimental results revealed that almost all disturbances in higher revolution per minute drives were flow-induced vibrations and that disturbances in helium-filled drives were dramatically smaller. On the other hand, several studies have been conducted on the issue of shock response inside HDDs [11]- [13], including finite-element analysis, and design modification studies in HDDs. For example, Li and Bogy [12] applied a multibody full HDD model and a complete air bearing model to study the HDI failures when the HDD was subjected to different kinds of shocks.…”

Section: Introductionmentioning

confidence: 99%

Simulation of HGA Vibration Characteristics Inside the Helium-Filled Hard Disk Drive

Zhang

Shen

et al. 2016

IEEE Trans. Magn.

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The reliability and stability of hard disk drives (HDDs) are especially important as the areal recording density is rapidly increasing and target to 10 Tb/in 2 in the future. The vibrations of the head gimbals assembly (HGA) are inevitable by internal fluid flow and external shock impulses. In this paper, a 3-D finite-element model of an HDD is developed. The internal flow-induced HGA vibrations are investigated by a fluid-structure interaction approach. The external shock-induced vibrations of HGA are also analyzed. The investigated filling gases in the HDD include air and helium.Index Terms-Flow-induced vibration, fluid-structure interaction (FSI), helium-filled drive, shock response.

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Design Modifications to Improve the Antishock Performance of a Stamped Base for a 2.5-in HDD

Cited by 14 publications

References 2 publications

Speed Control of Segmented PMLSM Based on Improved SMC and Speed Compensation Model

Speed Control of Segmented PMLSM Based on Improved SMC and Speed Compensation Model

Equivalent Circuit Model of Novel Solid Rotor Induction Motor with Toroidal Winding Applying Composite Multilayer Theory

Simulation of HGA Vibration Characteristics Inside the Helium-Filled Hard Disk Drive

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