Wireless ESD Event Locator Systems in Hard Disk Drive Manufacturing Environments

Thongpull, Kittikhun; Jindapetch, Nattha; Teerapabkajorndet, Wiklom

doi:10.1109/tie.2012.2227911

Cited by 14 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10 A very high frequency can be achieved and a working fluid with a high volumetric density can be employed. 11 Teo et al 12 proposed a new structure for a VCM with a force-current ratio of 60 N/A. Kim et al 13,14 developed two different types of VCM with a high force density for an electromagnetic actuator.…”

Section: Introductionmentioning

confidence: 99%

Optimization and simulation of a voice coil motor for fuel injectors of two-stroke aviation piston engine

Gao

Zhang

Wang

et al. 2019

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Two-stroke engines taking advantages of high power density and light weight as well as small size are widely used on aircrafts. Compared with conventional fuel injection system, gasoline direct injection technology can control the air-fuel ratio according to different working conditions and thus a more efficient combustion can be achieved. Normally, a solenoid valve is employed in the gasoline fuel injectors to control the injected fuel amount and timing. In this study, the performance of a novel voice coil motor for gasoline direct injection injectors of a two-stroke aviation engine is studied. The voice coil motor works as a linear actuator to pressurize the fuel, and thus the amount of injected fuel and the injection timing can be controlled by the driving current of the coil. As a result, the high-pressure pump of the conventional fuel injection system can be canceled. The working principle of the voice coil motor is described at first. Then, a finite element model of the voice coil motor is setup, and the influences of structure parameters including the coil turns, the magnetizer height, and the yoke thickness are analyzed. Subsequently, the magnetic equivalent circuit methodology is used to study the response characteristics of the voice coil motor. The results show that the coil turns, the magnetizer height, and the yoke thickness are three important parameters that will influence the electromagnetic force. The total mass and resistance of the coil and the coefficients k and k e are four important parameters that will influence the dynamic response time. A theoretical optimization of these parameters can improve the system performance of the voice coil motor significantly. The results of this study can provide a reference for the design of gasoline direct injection system for aviation piston engines.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization and simulation of a voice coil motor for fuel injectors of two-stroke aviation piston engine

Gao

Zhang

Wang

et al. 2019

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…the Blu-ray disc [10] [11]. The VCM is continually improved to reduce vibration [12], cope with the increase in volumetric density [13] and develop the control design for head positioning [14]. In recent years it is used for lens focusing and zooming on mobile camera phones due to the low current demands [15] [16].…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of a Voice Coil Motor With a Rotary Actuator for an Ultrasound Scanner

Smith

Graham

Neasham

2015

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

This paper proposes a new application for the rotary VCM. In developing a low cost ultrasound scanner for the developing world an oscillating transducer is required to sweep over the skin. The ultrasound scanner must operate from a USB power supply in remote locations. The application requires a 3.3N force on the coils of the motor to overcome the inertia of the skin. A proof of concept prototype motor with electronics has been designed, simulated and tested. The VCM optimisation is discussed in detail with the unique separation of the magnets being critical to reduce the axial bearing forces for this application.

show abstract

“…I N THE hard disk drive (HDD) industry, the areal density is continuously growing [1] and targeting to achieve more than 10 Tb/in 2 through the use of advanced recording technologies [2]. At such high track density, the fly height between the slider and the disk has to be lowered, even to the point of permanent contact with the media.…”

Section: Introductionmentioning

confidence: 99%

Contact-Induced Vibration in Dual-Stage Hard Disk Drive Servo Systems and Its Compensator Design

Huang

Venkataramanan

2014

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

This paper presents the experimental observation results of contact-induced vibration (CIV) and its compensator design in dual-stage hard disk drive servo systems, where the vibration is caused by the continuous contact of read/write head and recording media. Consistent relationships between the center frequencies and magnitudes of the vibration modes and the tested fly height, rotation speed, and track position are clearly observed and analyzed. It reveals that the CIVs excite and amplify only the resonance modes of the system. In consequence, the so-called P Q method is adopted to perform the compensator design. As such, the relative contributions to system output from the voice coil motor and lead-zirconium-titanate actuator subsystems can be well assigned in the frequency domain. The remarkable performance of the well-designed compensator is demonstrated by simulation.Index Terms-Contact-induced vibration (CIV), fly height, hard disk drive (HDD), rotational speed, servo systems, track position, vibration control, vibration measurement.

show abstract

Wireless ESD Event Locator Systems in Hard Disk Drive Manufacturing Environments

Cited by 14 publications

References 23 publications

Optimization and simulation of a voice coil motor for fuel injectors of two-stroke aviation piston engine

Optimization and simulation of a voice coil motor for fuel injectors of two-stroke aviation piston engine

Design and Optimization of a Voice Coil Motor With a Rotary Actuator for an Ultrasound Scanner

Contact-Induced Vibration in Dual-Stage Hard Disk Drive Servo Systems and Its Compensator Design

Contact Info

Product

Resources

About