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Paralleling of multiple resonant inverters is necessary for AC distributed power supply system. However, the multiple module operation (MMO) requires tight regulation of the output voltage of both amplitude and phase angle. Voltage control mode (VCM) has effective control over the amplitude of the output only. Perturbation, component tolerance and other(More)
A full bridge resonant inverter is proposed as one of the potential building blocks for high frequency ac distributed power supply. Because the load impedance in ac distributed power system is unknown and the input line voltage has wide range of variation, voltage feedback and feed-forward control has to be applied to regulate the output voltage. However(More)
Multiple-frequency modeling (MFM) offers a general small signal modeling methodology for resonant type converters. A DC/AC resonant inverter is decomposed into two pure DC sub-circuits for each harmonics, the excitations of which are orthogonal. However, such decomposition makes the definitions of active power P, reactive power Q, apparent power S and(More)
This paper investigates series-parallel resonant inverter for high frequency AC power distribution architectures for future computer and telecom applications. Resonant inverter differs from resonant converter in that the output side of the inverter is subject to linear load directly, while in the converter, a rectifier is followed by a filter with much(More)
The control issue of multiple inverter module operation (MIMO) is investigated for high frequency AC power distribution architecture, where multiple high frequency resonant inverters are connected in parallel to the high frequency, high voltage low current (HVLC) AC bus, to feed a number of point-of-use-power-supplies. The circulating current in MIMO is(More)
A modified asymmetric PWM inverter with a very simple auxiliary circuit is proposed for AC distributed power supplies where load impedance can be either capacitive or inductive. Zero voltage switching is extended to light load condition and input line ranges from 35 to 75 V. The operation mechanism is explained and design curves are given for a 1 MHz, 250 W(More)
This paper describes the topology aspects of a two-stage high frequency resonant inverter consisting of a buck converter and a half bridge series/parallel resonant inverter. The resonant inverter has the advantages of better waveform quality, zero voltage switching adaptability to both inductive and capacitive load, and high efficiency. Most importantly,(More)
This paper makes a comparison of various possible structures of high frequency resonant inverters. Four candidate topologies will be examined, that is, single stage resonant inverter with half bridge asymmetric PWM (SSRI-1), single stage resonant inverter with full bridge phase-shift PWM (SSRI-2), two stage with buck and resonant inverter (TSRI-1), and two(More)
The uncertainties of component tolerance, noise and perturbations place challenge in the circuit and controller design of a resonant inverter. Furthermore, in a high frequency AC distributed power systems where multiple inverter modules are paralleled, tight control of phase angle is mandatory, in addition to magnitude and frequency. This is because(More)
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