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ihe needs of system manufacturers for higher levels of system integration, improved performance and reduced costs have been met with the development of the power integrated circuit. The IPD03A/D03B/D203A are high voltage, high current monolithic bipolar power integrated circuits designed to drive DC motors, stepper motors and solenoids in applications which require bidirectional current control. Typical...
A new high-voltage integrated circuit (HVIC) is described which controls either PWM or Resonant half-bridge circuit topologies for power supply applications at frequencies up to 1 MHz. The HVIC technology allows the two power FETs in half-bridge circuit arrangements to be driven from a single silicon chip thus eliminating external, isolated gate drivers. Isolation for the "upper" FET gate...
Switch-peak-current commanding current-mode control produces asymmetrical operation when used in capacitively coupled symmetrical dc/dc converters. This paper discusses the causes and effects of asymmetry, gives an analytical model, and proposes a negative-feedback corrector to eliminate the asymmetry. Test results on a 150-W off-line halfbridge converter prove the effectiveness of the recommended...
The single-phase high frequency link appears to be an attractive alternative to the dc link commonly employed in power conversion systems. This paper proposes a power converter suitable for one-step conversion of the single-phase high frequency link voltage to the three-phase low frequency voltages typically required for interfacing with system sources and loads. The converter is utilizes zero voltage...
Many applications require holdover of a power supply's output for 10 to 1000 milliseconds to bridge short input power line outages or dips. Capacitive energy storage is a common means of providing this holdover. This paper examines the reliability of a capacitive energy storage system under both operating and storage conditions.
A new implementation of the (average) current mode control for a series resonant converter operated in the frequency range higher than the circuit resonant frequency will be introduced. The controller design is based on the ASDTIC (Analog-Signal-to-Discrete-Time- Interval Converter) concept but has some improvements over the original design which often suffered from static and dynamic instabilities...
Straightforward power processing is one of the many application fields of the recently discovered linear variable inductor, the LVI. A brief description of the operation principle and of the construction of an LVI is followed by a presentation of the simplest power processing cell utilizing this new component. The new cell operates in the continuous conduction mode only and features a number of desirable...
In switching converters very often the magnetic circuit part can seriously affect the converter electrical circuit performance, such as frequency response, for example. Conversely, the electrical circuit may impose undesirable waveforms upon the magnetic circuit and make it inefficient. The causes of these magnetic and electric circuit interactions in sWitching converters are uncovered. The proposed...
Switching regulators can now be placed directly on memory and CPU printed circuit boards. Small size is achieved through higher switching frequencies and hybrid packaging. However, "on-board" switching regulators can induce unwanted noise on printed circuit board etch. Methods for finding and reducing noise sources in a 150 Watt on-board regulator are described.
The use of computers in power electronics design has been limited principally to circuit simulation. There is, however, much more to product development than analysis and simulation. This paper examines the engineering process for power electronics products, from concept to manufacturing, and shows how the entire process can be pulled together around a common thread of computer based tools. Improvements...
A detailed survey of power quality around the world produced an unique collection of statistical data. The paper will present samples of the information collected and offer some analytical interpretations. It will also examine the implications these data have on requirements and on products built for protecting computers and other electronic equipment against power problems.
A new low-cost architecture For a P.W.M. modulator is presented. It uses two microprocessors in parallel and is adapted to any kind of voltage inverter, thanks to a programmable preconfiguration. It achieves high performance, increased reliability and ease of use. The use of an optimized P.W.M. strategy avoids any current or flux transient.
A charger circuit configuration which uses a simple control scheme and a minimum number of components is presented. Performance is subsequently described and analyzed in terms of open loop transient response, output voltage resolution, maximum output voltage and closed loop characteristics. The circuit is practically implemented using SCR's and the analysis is experimentally verified. The limits of...
The operating principle and a systematic design procedure for an utility line interfaced high-frequency link photovoltaic power converter is presented in this paper. The system consists of a high-frequency resonant inverter, a rectifier and a line commutated inverter. LCC type commutation is used for the resonant inverter. All the necessary design equations for designing 1-0 and 3-0 systems are given...
This paper describes the development of a 1.4 M H z secondary-side quasi-resonant off-line dc-to-dc converter. The material presented covers operation of the half-bridge circuit, derivation of the circuit equations, a design example, prototype description and comparisons between simulations and actual circuit performance.
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