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Algorithms and techniques are presented to tailor the values of circuit elements in fixed-topology circuit models to match data measured from physical inductors and capacitors. Measurements from several types of capacitors and inductors are used to illustrate the results as applied to models of differing complexity.
This paper describes a control scheme of a high frequency, high power current source inverter using static induction transistors to suppress the surge voltage and to reduce the switching loss during the commutation of current. The inverter is operated at a leading power factor, which requires the phase angle of the output current to be adjusted to each specific load point by the controller. The stable...
A line current modulated high-frequency (hf) link dc to utility interface power conditioning system using a square-wave output resonant inverter is proposed. The proposed system consists of a square wave output hf resonant inverter, a rectifier and a line connected inverter. The system is modeled using Constant current model for the high-frequency inverter and Step model for the dc link current. The...
A new method of power pulse modulation with internal frequencies of tens of kHz which is also suitable for multikilowatt power levels is applied to a series-resonant converter system for generating synthesized multiphase bipolar waveforms with reversible power flow. The power circuitry of the converter is provided with one single high-frequency resonant link in the direct energy path. Natural current...
This paper offers a new solution to the design of two-output dc-to-dc converters having one sole power transistor. The combination of a resonant converter and a tapped-inductor converter is the basis of this new approach which represents an improvement on previous studies. The fact that the dc voltage gain of the resonant converter is a function of the switching frequency but not of the load nor of...
During the conceptual design phase a 20-kHz power distribution system was selected as the reference for the space station. The system is single-phase 400 VRMS, with a sinusoidal wave form. The initial user power level will be 75 kW with growth to 300 kW. The high-frequency system selection was based upon considerations of efficiency, weight, safety, ease of control, interface with computers, and ease...
An investigation of the dynamic effects of coupled output chokes on multiple output buck converters reveals the potential presence of two zeros in the plant equation. These zeros can have a significant effect on the loop dynamics of the converter depending upon the relative turns ratios of the transformer and the coupled choke.
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