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| 1. |
Practical calculation of magnetizing force |
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Proceedings of the IEE - Part I: General,
Volume 97,
Issue 104,
1950,
Page 37-42
A.A.Halacsy,
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PDF (641KB)
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摘要:
Any vector component of the magnetizing force at a point in space due to an electric current is directly related to a vector representing the surface swept over by the radius vector of length 1/√rwith its origin and direction the same as those of the radius vectorrdirected from the point in question to consecutive points on the path of the influencing current. This relationship enables magnetizing force, distribution of the magnetic field, electromagnetic forces, etc., to be calculated by means of simple geometry in all practical cases, including those in which no simple analysis has so far been possible.
DOI:10.1049/pi-1.1950.0020
出版商:IEE
年代:1950
数据来源: IET
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| 2. |
Electrothermal, electrolytic, and electrostatic processes, and electric welding. Review of progress |
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Proceedings of the IEE - Part I: General,
Volume 97,
Issue 104,
1950,
Page 43-60
J.W.Cuthbertson,
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PDF (3453KB)
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DOI:10.1049/pi-1.1950.0021
出版商:IEE
年代:1950
数据来源: IET
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| 3. |
The measurement of the dielectric properties of high-permittivity materials at centimetre wavelengths |
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Proceedings of the IEE - Part I: General,
Volume 97,
Issue 104,
1950,
Page 61-62
J.G.Powles,
WillisJackson,
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PDF (243KB)
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DOI:10.1049/pi-1.1950.0022
出版商:IEE
年代:1950
数据来源: IET
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| 4. |
Electric and Diesel-electric traction on the Netherlands Railways |
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Proceedings of the IEE - Part I: General,
Volume 97,
Issue 104,
1950,
Page 63-76
H.J.Van Lessen,
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PDF (1639KB)
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摘要:
After giving some information regarding the demands on railway transport in the Netherlands, with special reference to passenger traffic, the author describes the development of electric and Diesel-electric traction.The conditions following the railway strike called by the Dutch Government in London in September, 1944, and the subsequent systematic pillaging by the Germans, are described. Information is given on the measures taken to repair the damage and on the post-war extension of the electrified system.The 1 500-volt d.c. system, which was adopted in 1921, was reconsidered in 1945, and has been retained as being the most suitable one for railway conditions in Holland.Hitherto motor-coach trains have been used exclusively, but in the near future it is intended also to use electric locomotives.The Netherlands Railways purchase electrical energy from municipal or provincial electricity supply companies. A description of the substations, the track-sectioning cabins and the overhead lines is given, as well as some figures for the erection costs of these items.Information is given concerning the rolling stock, including a description of the different train-sets, and train resistance is dealt with.The paper concludes with a comparison of electric and Diesel-electric traction, in which the author gives detailed information with the aid of various financial data concerning both forms of traction. From this it will be clear why the Netherlands Railways have decided in favour of electric traction for the further modernization of their system.
DOI:10.1049/pi-1.1950.0023
出版商:IEE
年代:1950
数据来源: IET
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