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IEEE Transactions on Industry and General Applications

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  • 1. New Concept in High School Design Uses Electric Heating and Air Conditioning

    Publication Year: 1966, Page(s):177 - 181
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3470 KB)

    The purpose of this paper is to point out the economies possible in designing new school buildings. In order to further these points, two schools in the Kansas City area are used as examples. The paper also shows how a new tool-Computer Environmental Analysis-can help not only in economic analysis but in design. Other sometimes controversial items such as electric water heating, fresh air, electri... View full abstract»

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  • 2. General Analysis of Three-Phase Inverters

    Publication Year: 1969, Page(s):672 - 679
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2706 KB)

    A method of analysis for three-phase inverters is described. The method is based on Park vectors [1], [2] and predicts the waveforms of inverter quantities under various load conditions. The procedure discussed can be used to determine the commutation sequence of a pulsewidth modulated inverter. The current distribution of the inverter can be obtained from the current vector. The vectors of the in... View full abstract»

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  • 3. Steady-State Performance and Analysis of the Series Resistance--Capacitance Circuit with Control by Adjustable Thyristor Triggering

    Publication Year: 1968, Page(s):644 - 654
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2670 KB)

    A pair of thyristors connected inverse parallel, with symmetrical triggering, are found to give smooth, stepless control of the current and load voltage in a series resistance-capacitance circuit. Large current pulses of adjustable amplitude are produced that appear to be suitable for electric welding. The application to power factor compensation of inductive loads is limited in usefulness due to ... View full abstract»

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  • 4. Proper Grounding Can Improve Reliability in Low-Voltage Systems

    Publication Year: 1969, Page(s):374 - 379
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3505 KB)

    Safety and reliability of electric distribution systems depend on many factors, including proper grounding. Correct functioning of ground fault relays depends on carefully designed busway housings and conduit connections. Busway housings are recommended as the preferred equipment grounding means because they achieve a low voltage drop value with little danger of electric shock. Eleven specific sug... View full abstract»

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  • 5. Torque Pulsations in Induction Motors with Inverter Drives

    Publication Year: 1971, Page(s):318 - 323
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2082 KB)

    Torque pulsations in induction motors would have an average value of zero and therefore are generally neglected by inverter induction machine system designs. A simple equivalent circuit method is presented for estimating the magnitude of torque fluctuations under steady-state operating conditions based on single-phase equivalent circuits. The method indicates that torque fluctuations are due mainl... View full abstract»

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  • 6. The Thyristor Electronic Transformer: a Power Converter Using a High-Frequency Link

    Publication Year: 1971, Page(s):451 - 457
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2352 KB)

    The electronic transformer is a device which behaves in the same manner as a conventional power transformer in that it steps voltage levels up or down while providing isolation and can accommodate load current of any power factor. It contains thyristor power switches which convert the low-frequency (dc to 400-Hz) voltage wave to a high-frequency (in the order of 10 000 Hz) wave. A comparatively sm... View full abstract»

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  • 7. Modes of Operation of Three-Phase Inverters

    Publication Year: 1969, Page(s):680 - 685
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (817 KB)

    Three-phase inverters have different modes of operation, while the load power factor angle varies over a 3600 range. A method of analysis is described which makes it possible to find these modes of operation. The method is based on the use of Park vectors. These vectors-generally used in the analysis of three-phase ac machines-are composed of the instantaneous values of a three-phase system. Volta... View full abstract»

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  • 8. Interpretation and Use of Generator Reactive Capability Diagrams

    Publication Year: 1971, Page(s):729 - 732
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1769 KB)

    The operating characteristics of generators are discussed with particular emphasis on those used in the generation of power for industry. Methods of operation of generators within safe limits are presented and related to a reactive capability curve. View full abstract»

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  • 9. Output Voltage in Three-Phase Pulsewidth-Modulated Inverters

    Publication Year: 1970, Page(s):570 - 579
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2117 KB)

    A theoretical analysis of pulsewidth control in three-phase pulsewidth-modulated inverters, is presented. Two general classifications of commutation schemes are discussed with respect to controllability of output voltage and commutation requirements. It is shown that for one scheme the output waveform is always defined regardless of load conditions but for the other scheme the output waveform is d... View full abstract»

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  • 10. Design Considerations for Microwave Oven Cavities

    Publication Year: 1970, Page(s):74 - 80
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4212 KB)

    The heating mechanism in a microwave oven results from the interaction of a high-frequency electromagnetic field and the food within it. In most ovens the field is generated by a magnetron which converts dc energy to high-frequency energy at approximately 2450 MHz. This energy is then propagated into the oven chamber which is, in reality, a multimode resonant cavity where the energy is reflected f... View full abstract»

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  • 11. Reevaluation of Lethal Electric Currents

    Publication Year: 1968, Page(s):467 - 476
    Cited by:  Papers (101)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2945 KB)

    Low-frequency electric currents of a few milliamperes flowing through the body cause muscular contractions. In the arm such an effect may make a subject unable to let go of a live conductor. The highest currents which 99.5 per cent of men and 99.5 percent of women are able to let go have been shown to be 9 and 6 mA, respectively. Currents somewhat larger than this, in the range of 20 to 40 mA, pas... View full abstract»

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  • 12. The Use of Concrete-Enclosed Reinforcing Rods as Grounding Electrodes

    Publication Year: 1970, Page(s):337 - 348
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4470 KB)

    The findings of Ufer that concrete-encased metal objects were effective in providing improved grounding under adverse soil conditions suggests that the reinforcing framework of footings for the columns of structural steel buildings would provide effective grounding function and means. Ensuing tests in high, medium, and low resistivity soils indicate that the grounding capability of such reinforced... View full abstract»

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  • 13. Cycloconverter Control of the Doubly Fed Induction Motor

    Publication Year: 1971, Page(s):95 - 100
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4292 KB)

    A new variable speed commutatorless electric drive system has been developed which has a speed-torque characteristic similar to that of a dc series motor. Efficient use of active material was attained by series connecting rotor and stator windings of the rotating machine and by achieving control over the torque angle relationship between rotor and stator MMF waves. Stabilized operation results fro... View full abstract»

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  • 14. The Problem of Arcing Faults in Low-Voltage Power Distribution Systems

    Publication Year: 1967, Page(s):15 - 25
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6058 KB)

    Many cases of electrical equipment burndown arising from low-level arcing-fault currents have occurred in recent years in low-voltage power distribution systems. Burndown, which is the severe damage or complete destruction of conductors, insulation systems and metallic enclosures, is caused by the concentrated release of energy in the fault arc. Both grounded and ungrounded electrical distribution... View full abstract»

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  • 15. Insulation Resistance and High-Potential Testing: Advantages and Limitations

    Publication Year: 1969, Page(s):326 - 332
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3677 KB)

    Downtime caused by electrical equipment breakdown or cable faults can often be substantially reduced by the use of highvoltage dc testing as a maintenance tool. The relative merits of ac versus dc testing, general principles of dc testing, types of tests, methods of performing the actual tests, and interpreting the results are explained. The value of insulation resistance measurements and their re... View full abstract»

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  • 16. The Effects of High-Voltage DC Power Transmission Systems on Buried Metallic Pipelines

    Publication Year: 1971, Page(s):403 - 415
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2062 KB)

    The types of high-voltage direct-current (HVDC) system configuration and the detrmental effects that this type of transmission can have on its surroundings are summarized. Discussed in detail are the test procedures followed and camred out to determine some of the effects on a major pipeline by simulated conditions, followed up by tests with the actual HVDC system and subsequent tests with the ope... View full abstract»

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  • 17. A Variable Low-Frequency Inverter Using Thyristors

    Publication Year: 1968, Page(s):501 - 507
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2137 KB)

    An inverter using thyristors, commutated by small inductance and capacitance only, and having an output frequency range suitable for motor speed control, is developed. The circuit operates as the combination of a high-frequency inverter and a cycloconverter in a single stage. As a high-frequency inverter its commutation requirements are very simple. As a cycloconverter it holds its output frequenc... View full abstract»

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  • 18. Capacitor Charging from Batteries with DC--DC Converters

    Publication Year: 1969, Page(s):600 - 606
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2236 KB)

    The major problems encountered in designing converters for capacitor charging are discussed. A design approach is outlined for designing an inductive storage (blocking oscillator) type converter and a design example given. Particular emphasis is placed on problems associated with using low-voltage nickel cadmium cells to power the converter. View full abstract»

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  • 19. Resistance of Low-Voltage AC Arcs

    Publication Year: 1970, Page(s):607 - 616
    Cited by:  Papers (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5187 KB)

    Arcing tests conducted in the electrical laboratory indicate that the most probable value of resistance of the low-voltage arc in ohms is equal to 40 divided by the arcing current to the 0.85 power. It is believed that this equation is approximately correct for 120 to 600 volt, 60-Hz ac stable arcing as ir a typical arcing burn-down in a panelboard or switchboard in which the arc length is approxi... View full abstract»

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  • 20. Voltage Control by Means of Power Thyristors

    Publication Year: 1966, Page(s):102 - 124
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5033 KB)

    This paper is presented as a tutorial informative survey on the subject of voltage control. Voltage control is discussed from several viewpoints: 1) control of direct voltage from an ac source, 2) control of alternating voltage from an ac source, 3) control of direct voltage from a dc source, and 4) control of alternating voltage from a dc source. Such various control modes as 1) phase control, 2)... View full abstract»

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  • 21. A New Ground Fault Protective System for Electrical Distribution Circuits

    Publication Year: 1967, Page(s):217 - 227
    Cited by:  Papers (40)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7671 KB)

    Distribution circuits which are solidly grounded or grounded through low impedance present a problem relative to fast clearing of ground faults. This is especially true in low-voltage grounded Y circuits which are connected to bus ducts or long runs of metallic conduct. The problem involves sensitivity in detecting low ground fault currents as well as coordination between main and feeder circuit p... View full abstract»

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  • 22. On the Analysis of the Three-Phase Induction Motor with Voltage Control by Thyristor Switching

    Publication Year: 1968, Page(s):304 - 311
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2331 KB)

    The three-phase induction motor, at constant speed, can be represented by five loop voltage equations in terms of variable inductance coefficients and instantaneous winding currents. Voltage control by symmetrical triggering of inverse parallel connected pairs of thyristors in the stator winding branches causes the motor excitation voltages to be segments of sinusoids. Current conduction angle at ... View full abstract»

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  • 23. Underground Corrosion and Electrical Grounding

    Publication Year: 1967, Page(s):237 - 243
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2363 KB)

    Underground corrosion associated with electrical grounding has caused numerous problems in operating electric systems. Much of the difficulty is due to dissimilar metal effects between buried copper and steel connected together via the grounding network. Unfortunately, these effects are widely ignored in electrical design and the requirements of electrical protection and corrosion mitigation are o... View full abstract»

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  • 24. Demand Estimation for Sizing Distribution Transformers and Secondary Services in Rural Areas

    Publication Year: 1967, Page(s):260 - 267
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2647 KB)

    Demand, energy con umption, and appliance data from 1156 rural consumers in 34 states were analyzed to determine coefficients of equations for predicting the 30-minute demands of individual consumers. Consumers in the South were found to have higher demands in relation to energy consumption than those in the North, and separate analyses were made for the two regions. The equations for predicting d... View full abstract»

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  • 25. An SCR Inverter with Good Regulation and Sine-Wave Output

    Publication Year: 1967, Page(s):176 - 187
    Cited by:  Papers (81)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3386 KB)

    SCR inverters of the sine-wave type are well known. Some have the disadvantages of poor regulation, very high component voltages when operating under heavy load, and an inability to operate with no load. View full abstract»

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  • 26. Redesign of DC Motors for Applications with Thyristor Power Supplies

    Publication Year: 1968, Page(s):508 - 514
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2577 KB)

    The accelerated trend toward the use of solid-state controlled power conversion equipment, as a replacement for the conventional Ward-Leonard motor generator set in direct current adjustable speed industrial drive systems, has focused attention on a number of undesirable side effects which detract from their outstanding advantages. These effects are due to the high ripple content in the rectified ... View full abstract»

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  • 27. Operating Experience of the Electric Drives and Control Systems of an 84-Inch Cold Rolling Mill

    Publication Year: 1965, Page(s):173 - 182
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8425 KB)

    The subject of this paper is the operating experience of Aluminum Company of Canada, Ltd., with the electric drives and control systems of a high-performance 84-inch cold rolling mill. Comparative horsepower energy curves for aluminum alloys are shown, and selection of the drive motors, together with actual performance data, are discussed. View full abstract»

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  • 28. Motor Surge Protection: at the Bus or at the Motor?

    Publication Year: 1965, Page(s):349 - 360
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1592 KB)

    This paper describes a fast easy method for determining expected surge voltage with the help of traveling-wave theory. The intent is to assist the Design Engineer in deciding what degree of surge protection should be provided and where to locate it. View full abstract»

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  • 29. New Nema Rerating of AC Motors

    Publication Year: 1965, Page(s):320 - 324
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1119 KB)

    The motor and generator section of the National Electrical Manufacturers Association (NEMA) has adopted new suggested standards for future design which assign higher horsepower rating to a given motor frame size. The rerating will make available standard 1-to 50-hp ac motors smaller by two frames than those motors produced in the past; this will, later, affect ratings to 200 hp. Per rating reducti... View full abstract»

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  • 30. Bus and Switchgear Protection

    Publication Year: 1970, Page(s):24 - 28
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2157 KB)

    This paper is a first draft of Chapter XI of a proposed publication on preferred practice in system protection and coordination being developed by the Industrial and Commercial Power Systems Committee of the IGA Group. It presents ideas on the application of protective equipment to industrial and commercial power system buses and switchgear. View full abstract»

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  • 31. Slip Power Recovery in an Induction Motor by the Use of a Thyristor Inverter

    Publication Year: 1969, Page(s):74 - 82
    Cited by:  Papers (24)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2240 KB)

    The low-speed efficiency of an induction motor is improved by rectifying slip-frequency power, inverting this to line frequency, and injecting it back into the supply directly (line feed-back) or through auxiliary stator windings (stator feedback). Torque-speed curves then have the nature of a variable-speed drive. The low power factor and nonsinusoidal supply current of the line feedback connecti... View full abstract»

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  • 32. Plugging an Induction Motor

    Publication Year: 1970, Page(s):10 - 18
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2571 KB)

    Plug stopping a low-inertia squirrel-cage induction motor can provide a very quick stop, but the motor draws high peak currents from the power system and delivers high transient torques to the driven machinery. This engineering phenomena is well documented, yet the potential pitfalls of plugging applications are often not appreciated. The induction motor is so widely used in industry that a review... View full abstract»

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  • 33. Motor Starting with Capacitors

    Publication Year: 1969, Page(s):759 - 765
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5540 KB)

    A portion of the high-inrush incident to starting of large synchronous motors can be supplied by static capacitors because of the low power factor of the inrush kVA. However, care must be exercised in application of the static capacitors so as to avoid harmful resonant conditions, overvoltage due to self excitation of the motor and the proper selection or sizing of equipment for a specific applica... View full abstract»

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  • 34. Constant Horsepower Operation of Induction Motors

    Publication Year: 1969, Page(s):552 - 557
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1937 KB)

    As an electromechanical transducer, the squirrel-cage induction motor is simple and rugged. With variable-frequency inverters it is possible to operate an induction motor over a wide range of speeds, supplying a constant horsepower load. Performance is a function of sizing of motors and sizing of inverters. These relationships are explored on a fundamental basis. View full abstract»

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  • 35. Transients in a Kramer Cascade

    Publication Year: 1966, Page(s):158 - 162
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4564 KB)

    This paper discusses some transients in a modified Kramer-cascade, i.e., a cascade with the mechanical converter replaced by a diode rectifier bridge. First, a new method of starting the drive is described. It uses a single resistor in the armature circuit of the dc motor with the additional advantages of high starting torques at relatively low starting currents. Also, a rapid method for braking t... View full abstract»

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  • 36. Precise Control of a Three-Phase Squirrel-Cage Induction Motor Using a Practical Cycloconverter

    Publication Year: 1966, Page(s):274 - 280
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7720 KB)

    The advent of the silicon controlled rectifier has permitted the design of a practical cycloconverter source of 3-phase electrical power which can be continuously controlled in frequency, from dc to approximately one-half the input power frequency, as required to control the speed of a 3-phase induction motor. The correspondence between the applied stator frequency, the resulting magnetic flux pha... View full abstract»

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  • 37. AC Motor Supply with Thyristor Converters

    Publication Year: 1966, Page(s):334 - 340
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7657 KB)

    Several circuits and devices are discussed which are used in European practice to control wound-rotor and squirrel-cage induction motors so as to reproduce the essential characteristics of dc motors. The application of thyristors is shown to make possible closely controlled, fast response operation of ac motors in single-and 4-quadrant service. View full abstract»

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  • 38. Wide-Range Speed Control of Three-Phase Squirrel-Cage Induction Motors Using Static Frequency Converters

    Publication Year: 1969, Page(s):53 - 60
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4643 KB)

    An equipment is presented for speed control of three-phase squirrel-cage induction motors supplied through a thyristor converter directly from the mains (the European 50-Hz system) by controlling the frequency and voltage magnitude. Thus a continuous speed control system is achieved, corresponding to a frequency range of from 2.5 to 85 Hz. Speed control is at a constant torque, up to the motor fre... View full abstract»

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  • 39. Electric Drilling Rig Developments

    Publication Year: 1967, Page(s):194 - 197
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2120 KB)

    The electrification of oil field drilling equipment has for the most part taken place on offshore installations and mobile units. Other applications of oil field drilling equipment have generally not utilized available electric transmissions because of factors not readily recognized. An attempt is made to review the design engineer's considerations for drilling equipment design and important envir... View full abstract»

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  • 40. Open-Wye-Type Phase Conversion Systems

    Publication Year: 1970, Page(s):146 - 148
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1584 KB)

    This paper describes the novel open-wye-type phase conversion system which operates three-phase motors on single-phase power. The system is initially depicted in its most basic circuit, with more sophisticated circuits presented as the paper progresses. Circuit voltages and currents are outlined for the basic system. Also presented is the increment (part winding) starting circuit used for large mo... View full abstract»

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  • 41. Underground for Rural Areas

    Publication Year: 1970, Page(s):71 - 73
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1640 KB)

    The already high ratio of investment to income in rural areas is a big problem. But, the additional investment in selective underground rural distribution (URD) primary is justified where exposure to tree and storm expense is indicated. A bonus result will be found in improved service. The engineer must be ready to substitute insulated overhead construction where unusually difficult soil condition... View full abstract»

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  • 42. Leakage Field Changes of an Induction Motor as Indication of Nonsymmetric Supply

    Publication Year: 1971, Page(s):713 - 717
    Cited by:  Papers (6)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1898 KB)

    An analysis of harmonics of leakage fields which appear in the vicinity of the motor at its symmetric and nonsymmetric supply is presented. The wave at the frequency (2 ¿¿s)¿¿f1, which appears in the second case, may be utilized to protect the motor against single-phase operation. View full abstract»

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  • 43. Simplified Air Density Correction of Vacuum Cleaner Performance Data

    Publication Year: 1970, Page(s):88 - 94
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2288 KB)

    This paper presents a simplified method for absolute determination of the perfornance correction for air density variations in a convenient ready to use form. It was developed through the use of computer analysis of data for 14 widely differing vacuum cleaner motors. By acknowledging that a 1-percent error in the vacuum correction factor was acceptable, a single curve was developed. A wattage corr... View full abstract»

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  • 44. Changing Aspects of Rural Underground Distribution

    Publication Year: 1966, Page(s):83 - 89
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5829 KB)

    The potential of underground distribution in rural areas is examined in terms of the gain in safety and reliability as well as in appearance. The applicability of underground service to specific rural loads and to conditions resulting from right-of-way difficulties and exposure to severe weather is discussed. Ferroresonance, charging current, voltage control, and other problems connected with the ... View full abstract»

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  • 45. Underground Residential Distribution and the Total Electric Subdivision

    Publication Year: 1966, Page(s):173 - 176
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1873 KB)

    Residential subdivision developers sharing the cost of underground residential distribution (URD) have enabled many electric utilities to provide this service to their customers. This paper describes how a small, fast-growing utility was able to financially justify and make URD available to its customers where financial assistance from the developer was not available. View full abstract»

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  • 46. Phase Shifting of Harmonics in AC Circuits of Rectifiers

    Publication Year: 1968, Page(s):655 - 658
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1689 KB)

    The origin and transformation of harmonics in rectifier circuits is traced in order to remove the confusion and traps that develop. Phase shift between the primary supply and secondary voltages does not in itself change the harmonic content of the primary supply current. However, each harmonic current is shifted by a different angle, and every other one is shifted in the reverse direction. As a re... View full abstract»

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  • 47. Safe Locked Rotor Time: How Safe Is It?

    Publication Year: 1971, Page(s):708 - 712
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3410 KB)

    Stalling of an induction-motor, or its failure to accelerate upon start-up, produces both thermal and mechanical stress within the stator and rotor which can be damaging. Whether the stator winding or rotor cage reaches unsafe stress limits first depends upon individual motor design. "Safe locked time" is considered the maximum period a motor can be locked on the line without significant loss of m... View full abstract»

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  • 48. HV DC Brushless Torpedo Propulsion Motor

    Publication Year: 1966, Page(s):297 - 301
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4339 KB)

    The 6.5-kV HV dc brushless torpedo propulsion motor based on a Lundell-type solid rotor machine design has been chosen as an essential component of the electric torpedo propulsion system. Sea water is employed as a power return when dc power is transmitted by a single wire. The series-type brushless dc motor is controlled by the specially designed static commutator comprised of a bank of series co... View full abstract»

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  • 49. Pulsed Current for Gas Shielded Arc Welding

    Publication Year: 1966, Page(s):225 - 233
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (12333 KB)

    Pulsed current systems, including simple contactor/commutator and/or semiconductor arrangements, are used to modulate the natural characteristics of welding arcs to enhance their properties, especially at low currents. View full abstract»

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  • 50. Low-Cost Ultrasonic Frequency Inverter Using Single SCR

    Publication Year: 1967, Page(s):378 - 388
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2599 KB)

    A low-cost solid-state circuit is described for generating up to a kilowatt of power over the frequency range of 400 Hz to 30 kHz. The circuit features good waveform and good regulation into a wide range of load magnitude and phase angle. View full abstract»

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Aims & Scope

This Transaction ceased production in 1971. The current retitled publication is IEEE Transactions on Industry Applications.

Full Aims & Scope