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Static Thrust Improvement of a Linear Proportional Solenoid 线性比例电磁阀静态推力的改进
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565967
H. Yamada;S. Kihara;M. Yamaguchi;H. Nakagawa;K. Hagiwara
{"title":"Static Thrust Improvement of a Linear Proportional Solenoid","authors":"H. Yamada;S. Kihara;M. Yamaguchi;H. Nakagawa;K. Hagiwara","doi":"10.1109/TJMJ.1994.4565967","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565967","url":null,"abstract":"A linear proportional solenoid (LPS) is an actuator for a proportional control valve used in hydraulic pressure-control devices. The LPS thrust must be constant over a specified displacement range, and must be proportional to the current. This paper describes simulations of the thrust-displacement characteristics of LPSes as determined by FEM, conducted with the aim of improving the LPM thrust. In model P, where high flux-density permendur was used in the LPS stator and mover, the maximum thrust increased from 27 to 40 N. The range of constant thrust, however, decreased from 1.0 to 0.5 mm. In model S, where permendur was used in the stator and mover, and the salient pole of the stator in the LPS was modified, the range of constant thrust was the same as in the present model. Moreover, the static thrust in the range of constant thrust increased from 27 to 38 N.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"117-121"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565967","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68041822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Fe-N Thin Films Prepared by Excimer Laser Ablation 准分子激光烧蚀制备Fe-N薄膜
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565972
T. Yoshitake;M. Ohkoshi;K. Tsushima
{"title":"Fe-N Thin Films Prepared by Excimer Laser Ablation","authors":"T. Yoshitake;M. Ohkoshi;K. Tsushima","doi":"10.1109/TJMJ.1994.4565972","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565972","url":null,"abstract":"Fe-N films were deposited on glass substrates at room temperature using a pulsed KrF excimer laser (wavelength 248 nm, pulse width 27 ns). The film composition and structure depend on the ambient N\u0000<sub>2</sub>\u0000 pressure, the laser pulse energy, and the repetition rate. In order to understand the interaction between light-emitting ablated particles produced by excimer laser ablation of Fe and ambient N\u0000<sub>2</sub>\u0000 gas, the dynamics of ablated plumes were investigated by means of a high-speed framing streak camera and time-resolved emission spectroscopy. Two distinct components of ablated particles were observed. One consisted of a spherical plume with an average velocity of over 100 km/s, which was observed for about 300 ns from the laser irradiation. The other consisted of a columnar plume with a maximum velocity of 22 km/s, which was observed for 1 to 10 μs. The velocity of the Fe radicals depends on the N\u0000<sub>2</sub>\u0000 pressure, which contributes to formation of the Fe-N film.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"146-152"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565972","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67872978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Compositional Variation of Saturation Magnetization for Fe-N Thin Films with Respect to Nitrogen Fe-N薄膜饱和磁化的组分随氮的变化
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565979
K. Kusumi;H. Miyajima;Y. Otani
{"title":"Compositional Variation of Saturation Magnetization for Fe-N Thin Films with Respect to Nitrogen","authors":"K. Kusumi;H. Miyajima;Y. Otani","doi":"10.1109/TJMJ.1994.4565979","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565979","url":null,"abstract":"Fe\u0000<sub>100-x</sub>\u0000N\u0000<sub>x</sub>\u0000 thin films were prepared by RF sputtering in nitrogen with a low plasma density. All films had compositions in the range 0≤x≤35 at% and consisted of a single metastable phase with a body-centered cubic structure. The saturation magnetization seemed to follow the Slater-Pauling curve with respect to the nitrogen concentration. In the films, the Fe atoms that were nearest-neighbors to nitrogen atoms were found to behave like Co atoms.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"191-196"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565979","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67872981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Performance Analysis of a Linear Oscillatory Actuator for a Milking Unit 挤奶机组线性振荡执行器的性能分析
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565968
N. Nishizawa;T. Ishii;H. Yamada
{"title":"Performance Analysis of a Linear Oscillatory Actuator for a Milking Unit","authors":"N. Nishizawa;T. Ishii;H. Yamada","doi":"10.1109/TJMJ.1994.4565968","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565968","url":null,"abstract":"Milking with a conventional milking machine often involves teat trouble, because the pulsation rate of the milking is not variable. A new cylindrical linear oscillatory actuator (CLOA) developed by the authors has a freely variable pulsation rate. This paper analyzes the static and kinetic thrusts of the CLOA. The mover of the CLOA is capable of oscillation at a frequency of 1 Hz with a stroke of ±2 mm, and will be used in new milking machines.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"122-126"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565968","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Effects of Cores on the Characteristics of an Induction VCM 磁芯对感应式VCM特性的影响
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565966
C. Kaido
{"title":"Effects of Cores on the Characteristics of an Induction VCM","authors":"C. Kaido","doi":"10.1109/TJMJ.1994.4565966","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565966","url":null,"abstract":"An induction voice coil motor (VCM) is composed of a moving metal ring, permanent magnets, cores and exciting coils. The moving ring current induced by an exciting coil current, and the magnetic flux of the permanent magnets, generate a driving force acting on the moving ring. The induction VCM is not able to generate forces below the lower cutoff frequency or above the higher cutoff frequency. The lower cutoff frequency is lowered by raising the permeability and lowering the hysteresis loss of the core; the higher cutoff frequency is raised by reducing core eddy current losses and lowering the leakage inductance of the moving ring. There is an electromechanical parallel resonance near the lower cutoff frequency, and the higher permeability and lower loss make the resonance stronger and lowers the resonance frequency.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"110-116"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565966","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Correlation between Noise-after-Write and Magnetic Domain in Thin-Film Heads by Electron Microscopy 用电子显微镜研究薄膜磁头写入后噪声与磁畴的相关性
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565982
K. Kobayashi
{"title":"Correlation between Noise-after-Write and Magnetic Domain in Thin-Film Heads by Electron Microscopy","authors":"K. Kobayashi","doi":"10.1109/TJMJ.1994.4565982","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565982","url":null,"abstract":"Noise-after-write has been reported in thin film heads, although its source or sources have not yet been identified. To discover these noise sources, I observed conversions of magnetic domain structure after writing with an electron microscope. The magnetic domain observations involved lock-in image processing for back-scattered electron contrast (type II), using a JEOL 2000FX II 200 kV electron microscope. Thin-film heads were excited by a 10 mA\u0000<sub>p-p</sub>\u0000, 100 kHz driving current. The magnetic domains in the upper yokes of the heads were observed after 60 mA\u0000<sub>p-p</sub>\u0000 write operations. The head with the highest noise probability, at 5.2×10\u0000<sup>-2</sup>\u0000, exhibited walls radiating outward from the back-gap closure, which were due to stress. The magnetic domain structure was severely deformed after writing. The head with the lowest noise probability, at 1.6×10\u0000<sup>4</sup>\u0000, exhibited a normal closure domain configuration, with very little conversion. These results indicate that noise-after-write is generated mainly near the backgap closure.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"210-217"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565982","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Read/Write Properties of Nd-RE-TM Films in the Short-Wavelength Region Nd-RE-TM薄膜在短波长区的读写特性
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565980
M. Ishida;T. Kawase;H. Miyazawa;T. Katsuyama;S. Nebashi;T. Shimoda
{"title":"Read/Write Properties of Nd-RE-TM Films in the Short-Wavelength Region","authors":"M. Ishida;T. Kawase;H. Miyazawa;T. Katsuyama;S. Nebashi;T. Shimoda","doi":"10.1109/TJMJ.1994.4565980","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565980","url":null,"abstract":"The effect of adding Nd to an RE-TM film on the disk's magnetooptic and read/write properties was investigated. It was found that as the amount of Nd was increased, the C/N ratio at a wavelength of 532 nm was improved. In spite of an increase in the Kerr rotation angle, the carrier level was not significantly improved. This fact can be explained by the disk's magnetooptic characteristics, as a result of which the Kerr ellipticity angle decrease in the short-wavelength region as the Nd content was increased. Thus the value of the figure of merit was not improved. The improvement in C/N ratio was due to a decrease in the noise level.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"197-201"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565980","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67872980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Opinion 意见
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565949
{"title":"Opinion","authors":"","doi":"10.1109/TJMJ.1994.4565949","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565949","url":null,"abstract":"","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"6-6"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565949","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Permeability and α-Fe Phase Precipitated in Fe-Si-B-Cu-Nb Amorphous Alloys Fe-Si-B-Cu-Nb非晶态合金的磁导率和析出的α-Fe相
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565955
Y. Ueda;S. Ikeda;T. Sakaguchi
{"title":"Permeability and α-Fe Phase Precipitated in Fe-Si-B-Cu-Nb Amorphous Alloys","authors":"Y. Ueda;S. Ikeda;T. Sakaguchi","doi":"10.1109/TJMJ.1994.4565955","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565955","url":null,"abstract":"The soft magnetic properties of amorphous Fe-Si-B-Cu-Nb alloys are markedly improved by annealing the alloys above the crystallization temperature. The magnetic permeability of the annealed Fe\u0000<inf>74</inf>\u0000Si\u0000<inf>x</inf>\u0000B\u0000<inf>22-x</inf>\u0000Cu\u0000<inf>1</inf>\u0000Nb\u0000<inf>3</inf>\u0000 alloys shows a maximum value at an Si concentration of x=14. The precipitation of μ-Fe grains is observed for the annealing temperature giving the highest magnetic permeability. The lattice constant of the α-Fe phase shows a minimum at the annealing temperature yielding the highest magnetic permeability, and depends strongly on the Si concentration. The Si content in the μ-Fe phase estimated from the lattice constant is about 20 at% for Si concentrations above x=12. The volume fraction of the precipitated μ-Fe phase depends on the B concentration in the amorphous alloy. The grain size of μ-Fe at the optimum annealing temperature is about 130Å. To explain the mechanism of the high permeability, it is necessary to consider factors other than the grain size the volume fraction of the precipitated μ-Fe.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"39-46"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565955","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Performance Evaluation of a Linear Pulse Motor-Driven Intra-Aortic Balloon Pump 线性脉冲电机驱动的主动脉内球囊泵的性能评价
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565964
K. Kobayashi;K. Suzuki;H. Nakagawa;H. Yamada
{"title":"Performance Evaluation of a Linear Pulse Motor-Driven Intra-Aortic Balloon Pump","authors":"K. Kobayashi;K. Suzuki;H. Nakagawa;H. Yamada","doi":"10.1109/TJMJ.1994.4565964","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565964","url":null,"abstract":"An intra-aortic balloon pump (IABP) is an effective device for supporting circulation in the event of acute heart failure. Small IABP devices are in urgent demand in medical fields. The authors have investigated an IABP device which uses a linear pulse motor (LPM) in order to reduce the device size. This paper discusses the characteristics of the LPM developed by the authors to drive the IABP, and describes the results of evaluation of an LPM-driven IABP. Our investigation revealed the following. (1) The trial LPM was 1.3 L in volume and had a mass of 6.3 kg. Its use will reduce the weight of IABP devices. (2) The LPM has a high thrust/volume ratio of 0.88 N/ml. (3) The driving characteristic of the LPM-driven IABP was evaluated using a mock testing device. The maximum pumping rate of this IABP device is approximately 120 beats/min. As a result, an LPM-driven IABP will be capable of sufficiently high performance to enable clinical use.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"98-103"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565964","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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