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Transactions of the American Institute of Electrical Engineers, Part II: Applications and Industry

Issue 5 • Date Nov. 1958

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Displaying Results 1 - 25 of 33
  • Effect of operating frequency on the weight and other characteristics of missile alternators and transformers

    Publication Year: 1958, Page(s):289 - 300
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3700 KB)

    THE extensive use of 400-cps (cycle-per-second) power systems in manned military aircraft and the consequent availability of standard 400-cps generation, conversion, and utilization components has caused this frequency to be used in most guided missiles currently in production or under development in the United States. However, as higher missile flight speeds, longer ranges, and greater accelerati... View full abstract»

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  • Properties of electrical insulation at ultrahigh temperatures

    Publication Year: 1958, Page(s):300 - 305
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5152 KB)

    THE ERA of high-speed nuclear-propelled aircraft and missiles has brought with it the need for electronic equipment which is both temperature and radiation tolerant. Present temperature and radiation goals as established by the U. S. Air Force for electronic power transformers are 500 C (degrees centigrade) ambient temperature and intense nuclear radiation. These are quite different from the 125 C... View full abstract»

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  • Design considerations for aircraft relays

    Publication Year: 1958, Page(s):305 - 307
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1111 KB)

    The missions specified for highperformance military aircraft have continually increased the relay switching requirements. Concurrently, the environmental and operational parameters tax the maximum capability of the state of the art. In addition, these relays must have increased reliability since their purpose is to provide simultaneous multiple functions, and also controls beyond the capability of... View full abstract»

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  • Magnetic circuit properties of the flux-switch inductor alternator

    Publication Year: 1958, Page(s):307 - 312
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1934 KB)

    The importance of the flux-switch-type inductor alternator as a device to provide electric power from high-shaft-speed turbine-driven sources has provided the need to extend the previous information available on the characteristics of the typical magnetic circuit used in such alternators. The experimental program presented in this paper includes data on the flux distribution in the electromagnet, ... View full abstract»

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  • Frequency transient measurements in power systems

    Publication Year: 1958, Page(s):312 - 316
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1471 KB)

    CONVENTIONAL instruments presently used for frequency transient measurements in power systems usually consist of a frequency discriminator, a direct-coupled amplifier, and an ink-writing oscillograph. Most frequency discriminators change calibration with changes of signal voltage and harmonic content. They exhibit drift as component parts age. Direct-coupled amplifiers categorically drift. Ink-wri... View full abstract»

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  • The turbonator: Design and development

    Publication Year: 1958, Page(s):316 - 322
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4588 KB)

    THE BASIC configuration of the electric generating systems used on aircraft has been changing rapidly in recent years. This change has carried from the wide-speed-range 30-volt d-c systems used on most World War II planes to the constant-frequency 400-cps (cycle per second) a-c systems used on newer aircraft. The advent of constant-frequency requirements on airplanes with variable-speed engines ne... View full abstract»

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  • Random paralleling of aircraft alternators

    Publication Year: 1958, Page(s):322 - 330
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2328 KB)

    MANY large aircraft in use today have constant-frequency electric power systems. The alternators in several of these systems can be operated in parallel and the procedure of connecting machines together electrically usually involves synchronizing and paralleling. Here synchronizing means bringing the machines into proper frequency and phase position, while paralleling is electrically connecting th... View full abstract»

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  • Progress in the thermal design of oil-cooled rotating electric machines

    Publication Year: 1958, Page(s):330 - 334
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1558 KB)

    IN THE PAST electrical designers have been hindered by the fact that internal temperatures in a machine were not known with sufficient accuracy. At best they had to be content with average temperatures estimated from measured coil resistances, for example, but the actual location of hot spots and the temperature distribution in the machine components have been difficult to establish. With the incr... View full abstract»

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  • Aircraft switching-type static inverter supplying rotating machines

    Publication Year: 1958, Page(s):334 - 338
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1688 KB)

    A STATIC INVERTER is a static device which is capable of transferring energy from a d-c source to an a-c load. A switching-type inverter is one in which the transfer of energy is performed by devices which behave essentially as switches. View full abstract»

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  • Design of an aircraft power-type circuit breaker for 600 F ambient

    Publication Year: 1958, Page(s):338 - 342
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4486 KB)

    PROJECTS in the 600 F (degrees Fahrenheit) ambient temperature area have recently assumed major importance in many new aircraft development programs. Significant progress had been made in the design and prototyping of a high-temperature aircraft power-type circuit breaker. The interplay of many ideas in the mechanical, electrical, and materials fields contributed to the effort to solve the difficu... View full abstract»

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  • Conductors and conductor protection

    Publication Year: 1958, Page(s):342 - 348
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2246 KB)

    IT is a purpose of this paper to note the principles underlying the establishment of current-carrying capacities of electric conductors including those for air-borne applications. Another purpose is to determine the concepts regulating the requirements for the protection of the conductors. Further objectives of this presentation comprise the consolidation of conductor performance and conductor pro... View full abstract»

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  • The limitations of induction generators in constant-frequency aircraft systems

    Publication Year: 1958, Page(s):348 - 352
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1614 KB)

    Starting from basic theory, this paper shows that induction generators are useful only if the speed range is limited. A number of seemingly ingenious schemes are discussed. The conclusion is that there is either no net output or that the efficiencies of the systems are too low for wide speed range operation to find practical application as constant-frequency aircraft electrical, supplies. View full abstract»

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  • Aircraft switch and relay inductive-circuit test loads

    Publication Year: 1958, Page(s):352 - 355
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2094 KB)

    Present contact-system inductive-circuit test procedure and standard inductors are shown to be inadequate for evaluating the performance of aircraft and missile relays and switches. The need for inductive-circuit testing of contact systems is shown to be critical since contact deterioration is proportional to the energy dissipated in the contact gap which, for inductive circuits, is likely to be m... View full abstract»

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  • A discussion of D-C high-potential test voltage for aircraft electrical insulation

    Publication Year: 1958, Page(s):355 - 359
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2271 KB)

    D-c high-potential test voltage that will detect aircraft equipment insulation flaws in a manner equivalent to the 60-cycle rms high-potential test voltage now specified is investigated. The purpose of equipment high-potential tests is stated to be the detection of insulation faults which are shown to be of two categories: 1. holes, cracks, discontinuities, and all faults which result in small-hol... View full abstract»

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  • Development of a dimmable aircraft fluorescent light system

    Publication Year: 1958, Page(s):360 - 365
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2592 KB)

    THE DEVELOPMENT program to be described was for the Douglas DC-8 commercial jet airplane and was inaugurated to provide an effective dimmable aircraft fluorescent light system. Prior to this development none was available. The deficiency had made fluorescent lighting for aircraft unattractive, despite its many other advantages. Specifically, the purpose of this program was to design and develop tw... View full abstract»

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  • A brushless D-C generator for aircraft use

    Publication Year: 1958, Page(s):365 - 372
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4752 KB)

    THE COMMUTATOR has long been a distinctive and sometimes troublesome feature of d-c generators. It functions as a mechanical rectifier converting the alternating armature voltages to direct voltage for the generator load. It is a well-known fact that the rectifying action of the commutator can be performed by static rectifiers if it is economically feasible to do so. In other words, a d-c generato... View full abstract»

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  • External heat transfer from cylindrical self-cooled electric equipment

    Publication Year: 1958, Page(s):372 - 377
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4476 KB)

    IN ADDITION to the usual electromagnetic and electrical limitations, the performance of electric equipment is dependent on its ability to dissipate its losses and still maintain safe component temperatures. For forced-cooled equipment, such as blast-cooled generators, a continuous flow of coolant is provided to carry away practically all of the heat. Since only one method of heat transfer need be ... View full abstract»

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  • Co-ordination of hydraulic transmissions and aircraft A-C generators

    Publication Year: 1958, Page(s):377 - 388
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3993 KB)

    IT HAS BEEN demonstrated in the past that hydraulic variable-input-speed constant-output-speed transmissions can fail under certain fault conditions. However, occurrences in flight with class A and class B systems have not been, to the authors' knowledge, a major source of trouble. As shown in this paper, the possibility of drive failure is greatly increased in applications of class C systems. In ... View full abstract»

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  • Prediction of the thermal behavior of blast-cooled generators by use of a digital computer

    Publication Year: 1958, Page(s):388 - 394
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2098 KB)

    The electrical rating of a blast-cooled aircraft generator depends on the flow rate and the temperature of the cooling air supplied. At the present time the nature of this dependence, for any particular machine, is obtained by correlating measurements of the thermal characteristics of the generator of that machine. Each distinct design requires a separate set of measurements. In this paper a diffe... View full abstract»

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  • Computer analysis of A-C aircraft generators

    Publication Year: 1958, Page(s):394 - 399
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2008 KB)

    ACCURATE electrical performance data obtained quickly and early in the preliminary design stages are necessary for aircraft generator design. The nature of the business is such that relatively few machines are designed in a given time, but each must meet a quantity of difficult specification requirements. These engineering requirements provide a natural application of the stored-program digital co... View full abstract»

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  • Staggered sampling to improve stability of multiple-sampler feedback systems

    Publication Year: 1958, Page(s):399 - 403
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1438 KB)

    THE PURPOSE of this paper is to present a technique which may be applied to improve the stability of sampled-data feedback control systems having more than one sampler without the use of additional compensating elements, and to illustrate by means of some examples the type of analysis procedure which may be used and the kind of results which may be expected. The technique which is referred to deal... View full abstract»

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  • The describing function of backlash followed by a dead zone

    Publication Year: 1958, Page(s):403 - 409
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1683 KB)

    AFTER the publication by Ralph Kochenburger1,2 of the describing function method of nonlinear servo design, several articles appeared in which the describing functions of common non-linearities were derived.2,3 It is the purpose of this paper to derive the describing function of a combination of two common nonlinearities which is not yet available in the literature. Graphs will be presented in a f... View full abstract»

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  • The design of analog computer compensated control systems

    Publication Year: 1958, Page(s):409 - 415
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1848 KB)

    The Problem of designing a continuous feedback control system may generally be stated in the following form: Given 1. The characteristics of the plant to be controlled, usually in terms of a transfer function. 2. A set of specifications of the desired characteristics of the over-all system. These specifications may cover such system attributes as transient response, frequency response, steady-stat... View full abstract»

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  • Synthesis of control systems based on approximation to a third-order system

    Publication Year: 1958, Page(s):415 - 421
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1805 KB)

    IN RECENT YEARS the high-speed performance and accuracy demanded of military applications and industrial processes have placed increasing emphasis on the dynamic characteristics of control systems. However, system design is most effective when both steady-state and transient performance specifications can be realized. Ordinarily the designer works from the open-loop to the closed-loop specificatio... View full abstract»

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  • Analysis of cyclic-rate sampled-data feedback-control systems

    Publication Year: 1958, Page(s):421 - 425
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1424 KB)

    IT IS NOT always possible, and sometimes not desirable, to have a sampleddata feedback-control system in which the samples are taken at uniform time intervals. Aperiodic sampled-data systems may result, for example, when time-shared computers are in the system loop or when data detection or transmission processes are inherently aperiodic (e.g. certain tracking radars). View full abstract»

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Aims & Scope

This Transaction ceased production in 1963. The current retitled publication is IEEE Transactions on Industry Applications.

Full Aims & Scope