Results 271 to 280 of about 1,347,052 (307)

Optimization of track seeking pulse waveform in hard disk drives

Digest of the Asia-Pacific Magnetic Recording Conference, 2003
Track access time is an important parameter for high performance hard disk drives (HDDs). Presently, the resonances of the head actuator assembly (HAA) caused by the pivot stiffness and mass of the HAA are becoming an even more urgent problem, since these resonances have become the main design factor which limits further reduction of track access time ...
null Sheng Zeng, null Limei Xu, null Rongming Lin, null Ningqun Guo   +3 more
openaire   +1 more source

P‐143: New Drive Waveforms for High Speed Erase Addressing

SID Symposium Digest of Technical Papers, 2008
Abstract We propose a new high speed driving waveform which uses a negatively biased voltage to the common electrode and an alternating ramp voltage to the scan electrode during the reset period and an erase address scheme. It showed short discharge time lag under 800nsec, wide address voltage margin over 40V and improved jitter ...
Jae‐Chul Jung, Ohyung Kwon, Ho Jung Syn, Joong Kyun Kim, Ki‐Woong Whang   +4 more
openaire   +1 more source

Loss-optimal PWM waveforms for variable-speed induction-motor drives

IEE Proceedings B Electric Power Applications, 1983
The paper calculates and provides results on loss-optimal commutation tables suitable for application in digital PWM commutation steering circuits for variable-speed induction-motor drives. The work differs from other works on this subject, because a special induction-motor-loss model is incorporated into the PWM waveform optimisation procedure, and ...
F. de Buck, P. Gistelinck, D. de Backer
openaire   +1 more source

Composite Waveform Generation for EMP and Lightning Direct-Drive Testing

1994
Abstract : An integral portion of electromagnetic transient (EMkT) testing is the survivability assessment. The ultimate goal of the survivability assessment is to establish the margin of survivability for the system under test. The margin of survivability is the ratio of system strength to anticipated stress.
null S. J., Frazier Jr., C. M. Graves
openaire   +1 more source

Digitising and measurement of variable-frequency waveforms in thyristor drives

Transactions of the Institute of Measurement and Control, 1985
On-going research within our department concerns the testing of thyristor drives for traction use. As a result of this work it became necessary to digitise the repetitive variable-frequency signals produced by the drives, to obtain by software processing root-mean-square and average values of current and voltage waveforms.
J.G. Martin, C.A. Roebuck
openaire   +1 more source

Optimal PWM waveform modelling for on-line AC drive control

6th International Conference on Power Electronics and Variable Speed Drives, 1996
The authors demonstrate that an optimal pulse width modulation strategy may be accurately implemented online for AC motor drive applications. The strategy has the distinct advantage of almost total elimination of selected bands of harmonics with control of the fundamental.
openaire   +1 more source

Nanocoating for Variable Frequency Drives Under Square Waveform

2023 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2023
Antigoni C. Konstantinou, Ashley Lam, Wesley Zhong, Riccardo Casalini, Yang Cao   +4 more
openaire   +1 more source

Current treatment and recent progress in gastric cancer

Ca-A Cancer Journal for Clinicians, 2021
Smita S Joshi, Brian D Badgwell
exaly  

Life and death in the soil microbiome: how ecological processes influence biogeochemistry

Nature Reviews Microbiology, 2022
Noah W Sokol, Eric Slessarev, Gianna L Marschmann   +2 more
exaly  

Emerging concepts in the science of vaccine adjuvants

Nature Reviews Drug Discovery, 2021
Bali Pulendran, Prabhu S Arunachalam
exaly