Results 251 to 260 of about 61,164 (293)

Correspondence: Stray loss measurements [discussion of "Separation of Stray Losses in A-C, Generators" by M.C. Holmes]

Journal of the A.I.E.E., 1929
The author of this correspondence wishes to add some further verification to conclusions of the above-named article by M.C. Holmes (A.I.E.E. Journal, March 1929, p. 224). The author states that he and a colleague have made several calorimeter tests on turbine generators and found that the load losses at the normal voltage, zero per cent power factor ...
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Precision Calorimetry for Stray Load Loss Determination

2000
The paper explains how the use of calorimetric techniques can lead to a dramatic increase in the accuracy of measurement of both total and stray load losses in induction motors. Analysis of the errors involved in determining stray load loss from total and component losses is. The need for a separate generated supply is explained.
K. J. Bradley, A. Ferrah, R. Magill, P. Mcleod, J. C. Clare, P. Wheeler, P. Sewell   +6 more
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Stray load losses of a 55,000-kva. generator

Electrical Engineering, 1932
Calorimeter tests on a 55,000-kva. hydroelectric generator show that the difference between stray load losses measured under load conditions and those measured under short-circuit conditions is slight. The method used by the authors is said to be applicable in general to all large units where an enclosed system of ventilation is used.
G. D. Floyd, J. R. Dunbar
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A stray loss problem in transformer tanks

Electrical Engineering, 1954
IN THE DESIGN of transformers, there are a great many problems regarding fields. Both dielectric and magnetic fields are involved and most of them are extremely difficult to solve mathematically. One problem involving the magnetic field is that of stray losses and heating of tanks.
F. J. Vogel, E. J. Adolphson
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When loads stray: Evaluation of Different Measurement Methods to Determine Stray Load Losses in Induction Machines

IEEE Industrial Electronics Magazine, 2007
The efficiency data provided by manufacturers are measured or calculated according to different national and international standards. These standards use different means to incorporate the stray load losses; thus the efficiency values obtained from different testing standards can differ by several percent. This leads to problems in competition and to a
M. Aoulkadi, A. Binder
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Measurement of Stray Load Loss in Polyphase Induction Motors

Transactions of the American Institute of Electrical Engineers, 1932
FOR LACK of a satisfactory method of measurement, no provision is made for stray load losses in the A.I.E.E. standard efficiency tests for induction motors. These losses may amount to from 2 to 5 per cent in squirrel cage motors from 1 to 5 hp. in size, decreasing gradually with increase in motor rating until they are less than 1 per cent for motors of
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Stray losses in armature end iron of generators

Electrical Engineering, 1955
IT was recognized early in the history of synchronous machines that generator operation at high-lagging, unity, and leading power factors resulted in extra losses and comparatively high temperatures in the structural parts at the ends of the armature core.
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A donor–acceptor-type hole-selective contact reducing non-radiative recombination losses in both subcells towards efficient all-perovskite tandems

Nature Energy, 2023
Cong Chen, Jarla Thiesbrummel, Changlei Wang   +2 more
exaly  

Transformer stray loss investigations on special models

2013
A special laboratory model for investigation of stray losses in transformer tank has been constructed. Stray losses represent the majority of measured total losses of the model what assures high measurement accuracy and certainty. Model consists of an excitation winding, core and a plate that represents transformer tank.
Janić, Žarko, Šulc, Ivan, Sitar, Robert   +2 more
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Origins of the open-circuit voltage in ternary organic solar cells and design rules for minimized voltage losses

Nature Energy, 2023
Yuming Wang, Rui Zhang, Sandra Hultmark
exaly