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IEEE Transactions on Power Apparatus and Systems

Issue 5 • Date May 1965

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Displaying Results 1 - 15 of 15
  • Pulling-Into-Step of Reluctance Synchronous Motors

    Publication Year: 1965, Page(s):349 - 352
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    The analysis of the pulling-into-step phenomena of salient-pole synchronous motors with dc field excitation gives unsatisfactory results when applied to reluctance motors (without dc field excitation). This difficulty can be overcome by taking the dynamics of the system into full consideration. By considering the rotor, the coupling, and the load as one dynamic system, satisfactory results can be ... View full abstract»

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  • Energy Conversion by Nonlinear Slip-Ring Electric Machines

    Publication Year: 1965, Page(s):352 - 356
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (895 KB)

    The matrix theory of electric machines is based on the assumption of magnetically linear iron. This paper removes the linearity assumption at the start, while permitting its reintroduction at a later stage as a computational simplification. A definition is given for inductance in the nonlinear case that leads to single-valued continuous inductances, with reciprocal mutual inductances. The resultin... View full abstract»

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  • Analysis of an Eddy-Current Brake

    Publication Year: 1965, Page(s):357 - 361
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (970 KB)

    The retarding torque of an eddy-current brake is calculated as function of the angular velocity of the rotor and of the stator dc magnetizing current. The electromagnetic field components are found in the rotor medium by solving the field equations. Integration of the power flow vector E X H over the rotor surface yields the total retarding power of the brake. The nonlinear nature of the B-H curve... View full abstract»

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  • Optimal Transient Removal in a Power System

    Publication Year: 1965, Page(s):361 - 374
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3101 KB)

    After a transient disturbance in a power system, some of the generators will have advanced in phase and some will have been retarded in phase. The deviation from steady-state operation can be removed in minimum time by optimal nonlinear bang-bang control. For each generator whose phase has advanced, the optimal control consists of exciting the field with maximum voltage, followed by a period of re... View full abstract»

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  • Flux Distribution in Saturated DC Machines at No-Load

    Publication Year: 1965, Page(s):375 - 381
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1221 KB)

    Based on a theory presented by Ahamed and Erdélyi [1], a method has been developed to find the magnetic flux densities in the air gaps, armatures, poles, and frames of dc machines, taking full account of nonlinearity caused by saturation. A digital computer program to obtain the no-load characteristics of large compensated dc machines is given and applied in analyzing 500-hp, 4-pole dc motors. Co... View full abstract»

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  • Calculation of Internal Fault Currents in Synchronous Machines

    Publication Year: 1965, Page(s):381 - 389
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1851 KB)

    An internal fault in the armature winding of a synchronous machine occurs at the breakdown of either the minor insulation (turn-to-turn fault) or the major insulation (phase-to-ground fault). The faulty synchronous machine is represented by an equivalent circuit in three symmetrical components which can be connected to the corresponding network. The fault currents can be calculated from the obtain... View full abstract»

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  • Inductances of a Portion of the Armature Winding of Synchronous Machines

    Publication Year: 1965, Page(s):389 - 396
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1450 KB)

    The main and leakage inductances are found from the flux linkages with the short-circuited part of the armature winding. The mutual inductances between the short-circuited part of the armature winding and the remaining part of the armature and rotor windings are proportional to the main inductance. A synchronous machine with a single phase-to-ground fault embracing a number of turns, Nf, can be re... View full abstract»

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  • Some Important Aspects in the Phenomenon of Commutator Sparking

    Publication Year: 1965, Page(s):396 - 404
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6938 KB)

    Carbon brush contact has been included as part of the commutation problem study since the beginning. The current conduction into commutator copper via the carbon brushes is not simple. Whereas brush contact conduction on a slip ring is uniform and depends on few factors, the conduction phenomenon on the commutator has a variety of associated problems, attributable not only to the nature and proper... View full abstract»

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  • Dependence of the Conduction Mechanism on Polarity in Stationary and Sliding Contacts When High-Resistivity Film Is Present in the Contact

    Publication Year: 1965, Page(s):404 - 411
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6250 KB)

    High-resistivity films thicker than 50 angstroms, which are present in a sliding contact between a graphite brush and a copper ring, are fritted at very small currents. Two kinds of fritting are observed: 1) when the copper is anodic, metallic bridges through the film between members are formed (the minimum field strength is approximately 4X104 volts per cm); and 2) when the copper is cathodic, th... View full abstract»

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  • Sakuma Frequency Converter Project

    Publication Year: 1965, Page(s):411 - 415
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (890 KB)

    Power system frequency has developed on a 50-cycle basis in northern Japan and on a 60-cycle basis in the south. Past efforts to unify the frequency have been unsuccessful. Both systems have now developed to the extent that this is now virtually impossible. To obtain the advantages of interconnection, despite this handicap, modern high-voltage dc techniques are used. In a single station, 50-cycle ... View full abstract»

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  • Second Interim Report-Minimum Electrical Clearances for Substations Based on Switching Surge Requirements

    Publication Year: 1965, Page(s):415 - 417
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (602 KB)

    The Working Group on Project 59.1 of the Transmission Substations Subcommittee of the IEEE Substations Committee is preparing a Guide for Minimum Electrical Clearances for Substations. This paper presents an interim report of tentative recommendations for clearances in substations rated 230 kV and higher, and based on switching surge considerations. Clearances for line-to-ground insulation systems... View full abstract»

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  • A Portable Fast-Response Transient-Voltage Counter

    Publication Year: 1965, Page(s):417 - 422
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2338 KB)

    A battery-powered solid-state 6-channel transient-voltage counter was developed which can detect transient voltages with durations as short as 20ns. This counter is sensitive to transient voltages of both polarities and has threshold levels from 50 to 300 volts, which can be altered by either internal biasing or external attenuators. It weighs about 13.5 pounds, and its dimensions are 15 by 6 by 7... View full abstract»

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  • Duty Cycle Testing of Current Limiting Station and Intermediate Lightning Arresters

    Publication Year: 1965, Page(s):422 - 425
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1522 KB)

    The testing of lightning arresters has been reasonably well defined by ASA C62.1-1962, but the comparatively recent development of current limiting arresters makes it necessary to re-examine some industry standards to determine whether they provide adequate proof of current limiting arrester performance. The duty cycle test requires revision because it does not subject lightning arresters to a rat... View full abstract»

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  • 345-kV Switching Surge Tests Exploring Dynamic Voltage and Arrester Performance

    Publication Year: 1965, Page(s):426 - 434
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4102 KB)

    This paper presents the results of switching surge tests on a 119-mile 345-kV circuit. For various methods of terminal switching, probability analysis is made of the magnitude and frequency of occurrence of transient and dynamic voltages when energizing the circuit through an autotransformer from systems with different soure impedances. Test results are compared with results of a model study on th... View full abstract»

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  • Authors

    Publication Year: 1965, Page(s):435 - 438
    Request permission for commercial reuse | PDF file iconPDF (3928 KB)
    Freely Available from IEEE

Aims & Scope

This Transactions ceased production in 1985. The current retitled publication is IEEE Transactions on Energy Conversion and IEEE Transactions on Power Delivery, and IEEE Transactions on Power Systems.

Full Aims & Scope