The Journal of the Institute of Electrical Engineers of Japan
Online ISSN : 2187-6797
Print ISSN : 0020-2878
ISSN-L : 0020-2878
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Volume 42, Issue 404
Displaying 1-5 of 5 articles from this issue
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  • Presidential Address
    IWASABURO NAKAHARA
    1922 Volume 42 Issue 404 Pages 189-192
    Published: 1922
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.42.189
    JOURNAL FREE ACCESS
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  • The Grounds on a Transmission Line and the Principle of Superposition
    H. Ho
    1922 Volume 42 Issue 404 Pages 193-198
    Published: 1922
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.42.193
    JOURNAL FREE ACCESS
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    The convenience of applying the principle of superposition of currents and electromotive forces in investigating the phenomena resulting from an accidental ground and its opening on a transmission line, and in explaining the action of Petersen coil, is pointed out.
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  • Theory of Single Phase Generator
    G. SHIMIDZU, K. ITO
    1922 Volume 42 Issue 404 Pages 199-227
    Published: 1922
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.42.199
    JOURNAL FREE ACCESS
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    In the first section of the present paper, solution for the fundamental equation covering steady phenomena is sought; and as its particular case, instantaneous maximum and effective values of steady short circuit current are calcalated; then it is pointed out that by finding approximate solution for the fundamental equation of short circuit current, the expression for the steady part makes good agreement with the solution of the steady short circuit current found on the beginning; next step is to find the maximum value of sudden short circuit current. The fore going solution, as in the case of the previous paper, are found under the following assumptions; that the field poles, are non salient, that the entire iron core is finely laminated, that the flux in armature and in field windings fluctuates in sine wave form.
    In the second section, in one, two or three phase type, the phenomena caused by short circuit taking place between two line terminals, is, fully explained. It is made evident by the authors explanation that, although, hither to, the excpounding on the single phase gene-rator is very far from being thorough, no serious errors can be caused from applying such conception in treating steady short circuit current because the fact that the magnetic leakage in the generator is fairly large.
    It is shown that the formulae developed by the authors are identical with those given by Boucherat and that any other conception in past is not trust worthy. About ten years ago, Boucherot obtained the rasult almost correct, for the reason that his presentation of formula and his mode of explanation was confused, exception of Niethammer reported these formulae, it seems, very few over attempted to expound, crificise, or apply this.
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  • Theory of Two and Three Phase Gcne ators
    G. SHIMIDZU, K. ITO
    1922 Volume 42 Issue 404 Pages 228-251
    Published: 1922
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.42.228
    JOURNAL FREE ACCESS
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    The paper treats rigorously a theory on t o and thrcc phase ien rators; taking the following assumptions, that the poles are nonsalicnt, that the entire iron core is finely laminated, that the wave form of flux produced in both the ariture and fieid coils is sinu-soidal and that inductance of same is constant and independent of the manitude of electrical current. The order of presentation is as fol. o. vs. At first, the authors by seeking complete solutions of fundamental differential equations, determine instantaneous value of current subjected to sudden change of load in general. Next, as an illustration of application of the method the value of sudden short circuit current of a generator is calculated. Finally, the foregoing results are compared to those obtained by the usual interpretation hithero generally has been used.
    The case in which, ho sever, the field core is made of solid iron is similar to the case of the sine wave altcrnator that was treated in the article appeared in the previous number.
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  • The grid Potential of a Triode and its Measurements
    T. ONO
    1922 Volume 42 Issue 404 Pages 252-257
    Published: 1922
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.42.252
    JOURNAL FREE ACCESS
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    The Electric field in a triode valve is closely related to the distribution of negative charges in the inter-Electrode space, and the potential distribution is determinate when the plate potential and the filament temperature are given.
    In order to conjecture the behaviour of the Electronic space charges, the potential of the freely disconnected grid was measured.
    Two methods are proposed for its determination, and it is shown that the results from both of the methods exactly coinside with each other.
    The results of observations on triodes with different characteristics are described, and tie physical phenomena in the bulbs are explained.
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