1970 IEEE Power Electronics Specialists Conference

20-21 April 1970

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Displaying Results 1 - 22 of 22
  • IEEE Power Electronics Specialists Conference - Cover

    Publication Year: 1970, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1970, Page(s): c2
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  • Power Conditioning Specialists Conference-1970 [Record]

    Publication Year: 1970
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  • Table of Contents

    Publication Year: 1970, Page(s): 3
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  • Paper selection criteria

    Publication Year: 1970, Page(s): 4
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  • Conference Organizing Committee

    Publication Year: 1970, Page(s): 5
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  • Communications satellite power conditioning systems

    Publication Year: 1970, Page(s):5 - 11
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (811 KB)

    Power conditioning systems for each of the four INTELSAT series are reviewed. INTELSAT I through INTELSAT III satellites are currently in operation at synchronous orbit. The INTELSAT IV series is to be launched starting in 1971. Silicon solar cells are the prime source of power for all these satellites; Ni-Cd batteries are used to supply power during eclipse operation. Progressing from INTELSAT I ... View full abstract»

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  • A regulated solar-array model-a tool for power systems analysis

    Publication Year: 1970, Page(s):12 - 17
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (785 KB)

    A digitally regulated solar-array represents a new concept in high-voltage power supply regulation, A mathematical model of the key elements of such a regulator is presented. It can be used in the performance evaluation of the interface between such a power source and a typical load. A range of load conditions and source states can be simulated. The model permits easy incorporation of source perfo... View full abstract»

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  • Power conditioning requirements for ion thruster systems

    Publication Year: 1970, Page(s):18 - 24
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1561 KB)

    A diverse set of specifications and requirements must be met by the power conditioning unit for an electric propulsion system. To meet these requirements, a typical unit contains power conversion, internal control loops, command subsystem for ground control, and telemetry. Power conversion circuitry must supply appropriate power to approximately 10 separate loads; there will be several feedback lo... View full abstract»

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  • Solid state power controller circuits and their effect upon power conditioning requirements

    Publication Year: 1970, Page(s):25 - 32
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1246 KB)

    This paper examines the effort of solid state switching upon aerospace electric power conditioning equipment. During the past ten years, aerospace solid state switching concepts have undergone laboratory and flight test evaluations to establish the feasibility of the systems approach. This extension of the program to include power conditioning studies reveals several parameters affecting the desig... View full abstract»

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  • Integrated circuit requirements for high power space power conditioning equipment

    Publication Year: 1970, Page(s):33 - 42
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    Projections of future spacecraft operational characteristics indicate that power conditioning requirements will become extremely demanding with respect to output power level, regulation, control, sequencing, and reliability. New approaches for design of power conditioning equipment capable of meeting such requirements are currently under development at a number of government and contractor laborat... View full abstract»

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  • Today's power IC techniques

    Publication Year: 1970, Page(s):43 - 53
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (3751 KB)

    Power IC products are still relatively new. The old idea that an IC is limited to only low power applications is giving way as an attack on power functions is being made by the IC industry. The techniques used in the products which are available today are presented and the three basic power IC approaches; the monolithic, chip, the "monobrid" circuit (a few chips), and the IC driver with external p... View full abstract»

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  • Limits of integrated circuits

    Publication Year: 1970, Page(s):54 - 59
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (2230 KB)

    There are no technical limits to the successful realization of high power integrated circuits. The move to high power requires that some additional factors be considered. Better packages are required, larger bonding wires are needed, heavier interconnect metal must be used, and large area power transistors are necessary. In addition, the second breakdown or Safe Operating Area limits of the IC pow... View full abstract»

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  • High voltage silicon integrated circuits

    Publication Year: 1970, Page(s):60 - 64
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1877 KB)

    Up until recently integrated circuits have been synonomous with low voltage applications. The reasons for this are numerous but suffice it to say that the conventional planar IC technology is not conducive to high voltage performance in the individual circuit elements. This paper will describe two modifications of the technology which make high voltage I C s a reality. The restrictions on power di... View full abstract»

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  • High voltage solid state switches for space applications

    Publication Year: 1970, Page(s):65 - 76
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1212 KB)

    A considerable saving in satellite weight is available if loads such as ion thrusters can be operated directly from high voltage solar cell supplies. Such operation raises the need for a high voltage switch for changing loads and reconfiguring the array at different stages of the mission, Silicon p-n junctions can theoretically be made with very high breakdown voltages but processing technology li... View full abstract»

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  • Application of integrated circuits in ion thruster power conditioning

    Publication Year: 1970, Page(s):77 - 86
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (2460 KB)

    The power conditioning system described is designed for operation from a 40 to 80 volt solar panel to supply power to a 20 cmo xide cathodeion thruster . The system was tested for more than 1300 hours and sustained thousands of arcs which produce large electromagnetic disturbances . Integ rated circuit swere used throughout for control and telemetry functions. Of special interest is a digit almult... View full abstract»

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  • Modular converters for space power systems

    Publication Year: 1970, Page(s):87 - 99
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (2249 KB)

    In an experimental satellite, power requirements can keep changing up to the launch date. Power converters with multiple outputs usually have only one output regulated; consequently varying loads will result in varying voltages. If the capability of one output is exceeded, the whole converter may have to be redesigned. One way to maintain flexibility as well as regulation is to use a separately ad... View full abstract»

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  • Application of integrated circuits in an electronically sequenced battery charger for multiple battery spacecraft

    Publication Year: 1970, Page(s):100 - 104
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (650 KB)

    The rapid development of manned and unmanned space vehicles has created a need for larger and more efficent spacecraft power systems.. Accordingly, the problems of battery charging in space have become more difficult to solve as the systems themselves become more and more complex. The initial and relatively simple schemes for diode coupling solar panels and batteries, for example, have given away ... View full abstract»

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  • A buck-boost main bus voltage regulator for a solar array battery space power system

    Publication Year: 1970, Page(s):105 - 113
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    This paper describes a novel high efficiency buckboost voltage for use in a solar-array battery space power system. The design approach for the switching regulator is presented, together with an analysis of its operation, definition of its characteristics, and functional performance. View full abstract»

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  • Maximum power transfer by conductance comparison

    Publication Year: 1970, Page(s):114 - 127
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (2640 KB)

    Most scientific satellites to date have utilized solar cells as the main power source for the spacecraft payload. Two basic methods have been utilized for operating a solar cell array at or near the maximum power point of its I-V characteristics. These two methods may be categorized as either an open loop system or a closed loop system. An open loop system makes use of design parameters of the sol... View full abstract»

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  • High efficiency solar cell array peak power tracker and battery charger

    Publication Year: 1970, Page(s):128 - 138
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    The unit described here is designed for the Airlock Vehicle that will permit coupling between an Apollo spacecraft and a Saturn IVB stage to form a manned orbiting workshop. Solar cell array power, converted by a switching regulator, is used to charge a battery and supply spacecraft loads. Maximum power is extracted from the array if the combined battery and load power requirements exceed the avai... View full abstract»

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  • Rotary transformer design

    Publication Year: 1970, Page(s):139 - 152
    Cited by:  Papers (12)
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    A high power rotary transformer (1 k W ) was considered as a replacement for slip-rings in a future satellite. A study was done to determine the best electrical design taking into account mechanical limitations while maximizing efficiency. Ferrite was used in a configuration which can be ground by any good machine shop. A design procedure is described which provides the engineer with a rough estim... View full abstract»

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