Proceedings, Fourth Annual IEEE Applied Power Electronics Conference and Exposition

13-17 March 1989

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Displaying Results 1 - 25 of 51
  • APEC 89. Fourth Annual IEEE Applied Power and Electronics Conference and Exposition. Conference Proceedings 1989 (Cat. No.89CH2719-3)

    Publication Year: 1989
    Request permission for commercial reuse | PDF file iconPDF (31 KB)
    Freely Available from IEEE
  • Operating characteristics of indirect field oriented induction motor

    Publication Year: 1989, Page(s):91 - 100
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Operating characteristics of an indirect field-oriented induction servo system fed by a current regulator are analyzed theoretically and supported by test results. The effect of two critical parameters, rotor time constant and flux current component, on steady-state and dynamic characteristics are analyzed and their tuning procedures are discussed. Parameter variations with operating temperature a... View full abstract»

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  • Integrated current regulation for a brushless ECM drive

    Publication Year: 1989, Page(s):81 - 90
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A method is described for regulating phase currents in a brushless electronically commutated motor (ECM) without the use of any discrete current sensors such as shunts or current transformers. Current feedback information is provided by current sensors integrated into MOS-gated power switches (i.e. MOSFETs and IGFETs), and the current regulation is performed by smart-power gate drive integrated ci... View full abstract»

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  • Driving three-phase brushless DC motors-a new low loss linear solution

    Publication Year: 1989, Page(s):75 - 80
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    A linear driver for small brushless DC motors has been developed that has the capability of maximizing the voltage delivered to the motor while providing commutation logic and full control. by using discrete p-n-p high-side transistor switches in conjunction with integrated saturable n-p-n low-side drivers, a total loss of under 1 V can be achieved at currents up to 2 A and complete motor control ... View full abstract»

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  • A comparison of IGBTs and power MOSFETs for variable frequency motor drives

    Publication Year: 1989, Page(s):67 - 74
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    Insulated-gate bipolar transistors (IGBTs) and power MOSFETs are compared for efficiency as well as system costs for a range of three phase pulse-width-modulated motor drives. Losses are calculated for two different carrier frequencies; system costs include the heat sink. The aluminum versus silicon tradeoff is discussed and relevant examples are given. Results are presented in a graphical format View full abstract»

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  • Computer-based design of optimal efficiency series-resonant converters above resonance

    Publication Year: 1989, Page(s):315 - 322
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    Power losses in series-resonant converters (SRCs) operated above resonance are examined to develop design guidelines for producing SRCs with high operating efficiencies. Expressions are developed as functions of the design variables for losses in the transistor switches, antiparallel diodes, and the resonant capacitor. Using these independent design variables as arguments, performance functions (s... View full abstract»

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  • Simulation of thermal effects in electrical systems

    Publication Year: 1989, Page(s):353 - 356
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Simulators based on the SPI CE program have one major limitation in that every device in a system must operate at the same temperature. A discussion is presented of modifications implemented in SPICE such that each device's operating temperature can be set independently by operating-point power dissipation and/or user input, and can vary during a transient analysis controlled by a user-defined par... View full abstract»

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  • Using CAE/CAT tools to evaluate power supply parasitics

    Publication Year: 1989, Page(s):56 - 63
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Computer-based techniques are developed for determining the values of the parasitic components which influence the transfer function of most power processing circuits. The techniques are straightforward and numerical examples are given. While a magamp post-regulator is used as an example, the general function is similar for most types of power converters, and the techniques developed for determini... View full abstract»

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  • Computer program for fast simulation and optimization of single-ended inductor-fed zero-voltage switching series-resonant DC/DC converters and DC/AC inverters with any loading topology

    Publication Year: 1989, Page(s):303 - 314
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (820 KB)

    An application-specific program, RESOCAD (RESonant converter CAD), is described that computes more than 250 times as fast as do general-purpose simulation programs, for single-ended, inductor-fed, zero-voltage-switching, series-resonant DC/DC converters and DC/AC inverters and for resonant rectifiers. The program computes steady-state periodic waveforms, input and output powers, all power dissipat... View full abstract»

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  • A method for estimating switch-mode power supply size

    Publication Year: 1989, Page(s):344 - 352
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    A method of estimating the physical size and layout of switch-mode power supplies is presented. This method includes analytical expressions for determining the physical size of inductors, capacitors, and transformers. The calculations are based on the black box input-output requirements of the power supply, and can be used to evaluate and compare competing design approaches or topologies. The tech... View full abstract»

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  • A two-stage two-phase double-forward converter for pulsed-load applications

    Publication Year: 1989, Page(s):46 - 55
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Design of the two-stage two-phase double-forward converter for pulsed-load radar applications is presented. This topology provides an optimum combination of fast output-current buildup time and low RMS current in the switching transistors. An equivalent small-signal circuit of this multiphase converter based on the single-stage model is developed. Results of the converter simulation under dynamic ... View full abstract»

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  • FB3480 new high speed current mode control IC master chip [for power supplies]

    Publication Year: 1989, Page(s):151 - 158
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    A reconfigurable high-speed switching regulator controller integrated circuit for power supply applications is introduced. The integrated circuit, designated as the FB3480, is an analog array chip with several preoptimized functional blocks usually found in high-performance controllers. In addition the chip has several large sections that can be reconfigured to meet specific design needs. The FB34... View full abstract»

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  • A general computer aided tool to assess the impact of component value tolerance on power supply performance

    Publication Year: 1989, Page(s):295 - 302
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    A computer-based tool for checking the effects of component value variation within a specified tolerance range is discussed. A model-building process is described for handling the single nonlinear equation that describes the investigated system over one complete cycle. Perturbation and subsequent linearization of the equation are used to obtain a linear continuous system for an `averaged' system m... View full abstract»

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  • Utility power requirements for electronic data processing equipment

    Publication Year: 1989, Page(s):23 - 33
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    A description is given of the effects of nonlinear loads on utility power along with the power quality needs of modern electronic data processing (EDP) equipment. Topics covered include the quality of utility power, power line disturbances (PLDs) and their types and frequencies of occurrence, and expectations for the future. Also discussed are the utility power needs of modern EDP equipment, and s... View full abstract»

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  • A novel magnetic-attraction positioning actuator

    Publication Year: 1989, Page(s):109 - 111
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A positioning actuator based on the principles of magnetic attraction and elastic repulsion is presented. The principle of operation of the actuator is simple and resembles that of a caterpillar. Three electromagnets are arranged in line and placed on a ferromagnetic surface. When energized, the two outer electromagnets, E1 and E2, adhere to the surface, anchoring the assembly. The central electro... View full abstract»

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  • Device level simulation for power converters

    Publication Year: 1989, Page(s):335 - 343
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The objective of device-level simulation of power converters is to obtain detailed performance information such as device voltage and current waveforms and power dissipations. The resulting model can also be used in the course of design to help optimize component choices. Issues involved in device-level simulation such as applications, problems, limitations and advantages are discussed. An example... View full abstract»

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  • A novel lossless snubber circuit

    Publication Year: 1989, Page(s):40 - 45
    Cited by:  Papers (1)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A simple lossless snubber circuit for use with a switch mode power converter is presented. The circuit uses a capacitor connected between the primary and tertiary windings of a transformer in such a way as to relieve the stress from the power semiconductor switch at both turn-on and turn-off. The energy stored in the leakage inductance of the transformer is recovered via the capacitor and the tert... View full abstract»

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  • Use of current injected control in solenoid focusing coil power supplies

    Publication Year: 1989, Page(s):125 - 135
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    The use of current-injected control in the design of solenoid power supplies is discussed. Such a supply is required to provide a constant current to a large inductive load. The control to output (power stage) transfer characteristics are worked out for a generalized load. The location of the poles and zeros and the effect of load inductance on the inner current loop are investigated. This control... View full abstract»

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  • Multiple limit cycle phenomena in switching power converters

    Publication Year: 1989, Page(s):143 - 148
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The operation of switching power supplies is characterized by limit cycles. For a particular class of converters the limit cycle is not unique, and the converter output can jump almost at random among possible cycles. Converters subject to this behavior and methods for eliminating multiple-limit-cycle phenomena are presented by the authors. Experimental results on a hysteretic DC-DC converter are ... View full abstract»

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  • High density surface mounting power supply

    Publication Year: 1989, Page(s):265 - 271
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The various stages in the design of a high-density surface-mounted power supply are described, including the development of the passive power components, power chip carrier package, and interconnection substrate. Emphasis is on the design and minimization of the power ceramic capacitor, quadrupole capacitor, and transformer components. The construction of a 16-60 V/5 V 20 A DC-DC converter using t... View full abstract»

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  • A high-density modular power processor for distributed military power systems

    Publication Year: 1989, Page(s):403 - 412
    Cited by:  Papers (22)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A high-density power processor in a SEM (standard electronic module) Format-E package is described. The power converter features a full-bridge PWM (pulse-width modulated) topology that uses transition resonance to achieve zero-voltage switching. The switching sequence of the phase-shifted topology simplifies the MOSFET drive circuitry. The converter's tolerance to low magnetizing inductance reduce... View full abstract»

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  • Rectifier design for minimum line current harmonics and maximum power factor

    Publication Year: 1989, Page(s):13 - 22
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    A current quantitative computer simulation-based analysis is presented for single- and three-phase rectifier line current harmonics and power factors as a function of the output filter inductor. A finite-output filter inductor is shown to produce minimum single-phase rectifier line-current harmonics and, if used with an input displacement power factor correction capacitor, to produce maximum overa... View full abstract»

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  • Thick-film power hybridization of switchmode power circuits

    Publication Year: 1989, Page(s):249 - 255
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    To help the electrical circuit designer better understand what is involved in a hybrid circuit design and to aid the designer hybrid-compatible circuits, the author presents a tutorial on the design of a power hybrid circuit. The structure of a power hybrid circuit is given along with the device's material properties and dimensions. Thick film and copper-on-ceramic techniques are presented. The de... View full abstract»

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  • 150 Watts and 140 kHz multi-output LCC-type parallel resonant converter

    Publication Year: 1989, Page(s):221 - 230
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    By using the state-plane approach, the steady state analysis and design of a high-frequency LCC-type parallel resonant converter (PRC-LCC) operating in the continuous conduction mode is presented. In this topology a capacitor is added in series to the inductor of a conventional PRC. Based on this analysis, a set of steady-state characteristic curves for component value selections and device rating... View full abstract»

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  • A 500 V monolithic power MOSFET switching 100 A at greater than 10 MHz

    Publication Year: 1989, Page(s):386 - 390
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    A family of power transistors consisting of monolithic n-channel power MOSFETs is described. The totally self-aligned Power MOS IV has been used to produce devices that can switch 100 A at >10 MHz while blocking 500 V. With this technology, much larger and more powerful MOSFETs are being produced such as the APT 107 die at 388×588 mil or 228000 mil2, and the APT 108 die at 585&... View full abstract»

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