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This paper presents a developed impedance-type power inverter that is termed switched-inductor Z-source inverter. To enlarge voltage adjustable ability, the proposed inverter employs a unique switched-inductor impedance network to couple the main circuit and power source. Compared with the classical Z-source inverter, the proposed inverter increases the voltage boost inversion ability significantly,...
Switched converter (SC) DC/DC converters are new prototype of DC/DC Conversion technology. Since switched capacitor can be integrated into a power IC chip, consequently, these converters have small size and high power density. Switched capacitor can be used in voltage-lift technique to construct DC/DC converters. The clue is that for the converters operating in input current discontinuous mode (ICDM)...
For voltage-source inverters, the dead-time necessary to prevent the shoot-through of the inverter-legs results in output voltage distortion. In this paper, the analysis of voltage distortion is investigated with the consideration of the dead-time and the non-ideal characteristics of the switching devices. From the analysis, an accurate dead-time compensation method is proposed. This method is based...
High frequency switching circuits can effectively increase the power density, efficiency, reliability and flexibility, and reduce power losses and equipment cost. Consequently, high-frequency switching circuits have been paid much attention in recent decades. These performances are thoroughly different from traditional analogue control systems. Till now there is no suitable theory to describe the...
AC/AC matrix converter is an array of power semiconductor switches that connects directly a three-phase AC source to another three-phase load. It can convert an AC power source with certain voltage and frequency to another AC load with variable voltage and variable frequency directly without DC link and bulk energy storage component. Classical modulation methods such as Venturini method and space...
AC/AC matrix converter is an array of power semiconductor switches that connects directly a three-phase AC source to another three-phase load. It can convert an AC power source with certain voltage and frequency to another AC load with variable voltage and variable frequency directly without DC link and bulk energy storage component. Classical modulation methods such as Venturini method and space...
The conventional modelling methods for the multi-state boost converter are usually restricted by its complicated switching behaviours. This paper presents a novel mathematical modelling method for the multi-state boost converter from a viewpoint of system energy characteristics. The generalized concepts of system energy parameters of dc/dc converters are introduced to the modelling process, which...
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