1971 IEEE Power Electronics Specialists Conference

19-20 April 1971

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  • 1971 IEEE Power Electronics Specialists Conference [Front Cover]

    Publication Year: 1971, Page(s): c1
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    Freely Available from IEEE
  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1971, Page(s): c2
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (97 KB)

    The Aerospace and Electronic Systems Group is an organization, within the framework of the IEEE, of members with a similarity of professional interests. All members of the IEEE are eligible for membership in the Group, and will receive the TRANSACTIONS and NEWSLETTER of the group upon payment of the annual Group membership fee of $5.00. For information on joining write to the IEEE at the address b... View full abstract»

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  • Power Conditioning Specialists Conference - 1971 [Record]

    Publication Year: 1971, Page(s): 1
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  • Table of contents

    Publication Year: 1971, Page(s):3 - 4
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  • Paper selection criteria

    Publication Year: 1971, Page(s): 2
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (99 KB)

    All papers published in this Conference Record are considered as "Publications of Record" and are eligible for prize paper awards. An abstract of each paper will appear in the November 1971 issue of the IEEE Transactions on Aerospace and Electronic Systems, Volume AES 7 Number 6. These abstracts and the papers in this volume will be included in the 1971 Index to this publication. View full abstract»

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  • Power conditioning requirements and trade-off considerations for the space shuttle

    Publication Year: 1971, Page(s):5 - 12
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    Avionics equipment that utilize electrical power typically convert this power by means of a converter internal to the equipment into several voltage levels. These voltages are regulated and used to power the electronic circuits within the equipment. Considering the number of electronics equipments required on the shuttle, the question arises as to whether the power converter normally supplied in e... View full abstract»

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  • Efficiency/reliability design requirements at low output voltage levels

    Publication Year: 1971, Page(s):13 - 20
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (2126 KB)

    Higher efficiency and reliability are needed in the rectification used to produce low output voltages. To this end, the application of driven synchronous rectifier circuits is investigated. One reliability problem of such circuits, the "double-on" resulting from storage time, is illustrated for low output voltages obtained from rectification of the square-wave outputs of low input voltage converte... View full abstract»

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  • Improved charging methods for nickel-cadmium batteries used in satellites

    Publication Year: 1971, Page(s):21 - 29
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1299 KB)

    Satellite power system designers have known for several years that charging methods need to be improved to increase life and reduce weight of nickel-cadmium batteries. Although considerable work has been done on battery designs and charging methods to improve performance, in present long-life systems only about 25-percent of the battery energy can be used during a satellite orbit. The Chrysler Cor... View full abstract»

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  • Power processing requirements for solar electric propulsion

    Publication Year: 1971, Page(s):30 - 36
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    The successful integration of a light-weight, high-efficiency power conditioning (PC) unit with an electron bombardment ion thruster using a hollow cathode at JPL has been reported recently. This paper summarizes the presently conceived requirements by which the next generation of PCs should be judged and evaluated. The requirements are formulated in terms of a deep space mission, which implies th... View full abstract»

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  • Testing of a 470 ampere RMS 2000 volt regenerative gate turn-on thyristor

    Publication Year: 1971, Page(s):37 - 43
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (3563 KB)

    The Army's requirements for new concepts in land mobile power converter systems includes electrical power conversion equipment suitable for propulsion and precision power. However, cost effective power conversion by electrical means is dependent upon the availability of reliably performing thyristor switching devices. Some of the thyristor performance criteria are switching speed, blocking voltage... View full abstract»

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  • Intelsat III traveling wave tube power supply

    Publication Year: 1971, Page(s):44 - 49
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    The performance requirements and design approach used to develop the Intelsat III dual TWT power supply are discussed. In addition, final acceptance test performance data are examined. The dual TWT power supply described here provides power regulation and certain control functions for a 0.1 watt (R.F.) driver and a 12 watt (R.F.) power amplifier operating at 4 GHz. The supply operates from a space... View full abstract»

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  • Analysis of SCR chopper drive

    Publication Year: 1971, Page(s):50 - 57
    Cited by:  Papers (1)
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    An analysis is made of the SCR chopper for the control of traction motors. The analysis divides the chopper period into several sub-divisions, the dynamic circuit equations for each time interval are derived and an on-line digital computer is used to determine the complete solution through an iterative process. Computer simulations over a wide range of possible design conditions are summarized. Th... View full abstract»

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  • Very-high-frequency DC-to-DC conversion and regulation in the low-megahertz range

    Publication Year: 1971, Page(s):58 - 65
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    Anticipated new mission requirements have motivated research on very-high-frequency (VHF) regulated dc-to-dc converters to operate at conversion frequencies in the low-meghertz range. State-of-the-art electronic components for VHF operation are discussed. Two different converter configurations, one using proportional control and having a conversion frequency of 1.0 MHz and the other using bistable... View full abstract»

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  • Some design aspects concerning input filters for DC-DC converters

    Publication Year: 1971, Page(s):66 - 76
    Cited by:  Papers (9)
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    Various DC-DC converter input filter requirements as applied in spacecraft power processing equipment, are reviewed with respect to the spacecraft, its power source and filter loads. The conflicting implications arising from the requirements are noted. A filter configuration capable of providing a satisfactory overall compromise is presented. Various design aspects for converter input filters are ... View full abstract»

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  • Integrated electronics SCLAR array control unit

    Publication Year: 1971, Page(s):77 - 85
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    This paper describes the implementation and initial test results for a unique digital-analog solar array control concept wherein portions of the circuitry are electrically and physically integrated with the solar array subsystem. The concept has been developed to capitalize on the high efficiency and reliability advantages of the shunt regulator while minimizing the attendant thermal dissipation o... View full abstract»

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  • Pulse width modulated series inverter with inductor-transformer in low power applications

    Publication Year: 1971, Page(s):86 - 93
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1099 KB)

    The power requirements for spacecraft have been increasing steadily from the watts requirements to kilowatts requirements. Simultaneously, however, the demands on reliability and simplicity of conversion circuits have been raised and the weight allowances in pound per kilowatt of conversion equipment have been lowered. View full abstract»

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  • The use of resonant circuits in power conditioning equipment

    Publication Year: 1971, Page(s):94 - 100
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1106 KB)

    Four different power conditioning circuits are described showing how the series resonant circuit can be used instead of the saturating transformer to determine opeating frequency. These circuits are a dc-to-squarewave inverter and an ac-to-ac frequency sextupler, both fully qualified for aerospace, a dc-to-dc converter and a dc-to-sinewave inverter, both in the successful prototype stage. Attentio... View full abstract»

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  • Time optimal response control of a two-pole single-phase inverter

    Publication Year: 1971, Page(s):101 - 109
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1770 KB)

    Transient-free sinusoidal output can be achieved without circuit complexity in today's advanced static inverter where output waveform synthesis is done by time-optimal-response "bang-bang" or by "bang-hang" technique. A reference signal (usually a sine wave) is reproduced with high fidelity and good efficiency (80% to 92%) even under adverse conditions of dc source voltage modulation and non-linea... View full abstract»

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  • Multi-phase, 2-kilowatt, high-voltage, regulated power supply

    Publication Year: 1971, Page(s):110 - 116
    Cited by:  Papers (16)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (3043 KB)

    Development of a flight configured experimental power supply delivering 2 kw of conditioned power represents a concentrated effort at advancing the state-of-the-art in high voltage power supplies for space application. The power supply described herein was designed for use with the Jet Propulsion Laboratory (JPL) 20 cm Mercury Ion Thruster. However, its modularized design philosophy allows adaptat... View full abstract»

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  • 2800 watt series inverter DC power supply

    Publication Year: 1971, Page(s):117 - 123
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    A high efficiency, low weight silicon controlled rectifier power supply which supplies 28V @100A is described. The power supply operates from a conventional 3 phase 120/208Vdc (50 to 1600Hz) power source. The AC power source is converted directly to DC which powers two SCR inverters operating phase displaced up to 12.5 kHz. The two inverter outputs are rectified and fed into a common output filter... View full abstract»

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  • The electrical power subsystem of the pioneer F/G spacecraft

    Publication Year: 1971, Page(s):124 - 133
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    The Pioneer F/G spacecraft is the first to use radioisotope thermoelectric generators (RTG's) for a long duration interplanetary mission. This paper describes the design of the spacecraft power subsystem which meets the unique requirements of such a mission. The primary power source consists of four SNAP 19 RTG's. The 4. 2 volt dc outputs of the RTG's are inverted to higher voltage ac by four inve... View full abstract»

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  • Electrical power subsystem for the initial defense communications satellite program/augmentat ion (IDCSP/A)

    Publication Year: 1971, Page(s):134 - 140
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    The IDCSP/A satellites are communication satellites built by Philco-Ford Corporation under contract to the United States Air Force for United Kingdom applications, tailored for compatibility with the near synchronous IDCSP communication satellite network. These satellites utilize a mechanically despun antenna system and a hydrazine reaction control system for attitude control and station keeping. ... View full abstract»

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  • "New techniques in the design of sonar power amplifiers"

    Publication Year: 1971, Page(s):141 - 146
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    The design techniques, performances, and applications are described for two new types of transistorized sonar switching amplifiers which are used to drive large transducer arrays. The amplifiers are designed to drive complex impedances and are fully protected against shorts and open circuits on the output. Tests proved these amplifiers to be free from the effects of load variations, to have high e... View full abstract»

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  • Factors in the design of a power transfer system for inductively coupled oceanographic sensors

    Publication Year: 1971, Page(s):147 - 151
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    An outline is given of the factors involved in the design of a system for powering oceanographic sensors inductively coupled to a long mooring cable, in particular where the total system power must be held to an absolute minimum. A calculation is made of the total power that is transmitted down the cable for given minimum power into the sensors, assuming a fixed impedance for the seawater return p... View full abstract»

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  • Influence of electric power quality on avionic design and weapon system effectiveness

    Publication Year: 1971, Page(s):152 - 161
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    Design of all avionic systems on future aircraft is tied to the past by MIL-STD-704. Despite dramatic advances in performance and reliability of the avionic equipments, the power conditioning section of each subsystem must still tolerate wide frequency swings on a transient basis, long power interruptions, large voltage transients, and unbalanced phase voltages. During the past decade, General Ele... View full abstract»

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