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The “More Electrical Aircraft” concept involves a significant increase of power demand in modern aircrafts. In this context, a new high voltage DC distribution system has been proposed. This makes it necessary to develop a new generation of DC-DC converters to supply the 28VDC loads. These converters must comply with stringent requirements in terms of power density and electromagnetic compatibility...
The average-value model (AVM) of the modular multilevel converters (MMCs) is the simplified one for the average response of switching devices, converters and control. The effect of sub-module capacitor voltage ripple on the MMC dynamic behavior is explored and an accurate average-value model of MMCs is established. Based on the proposed AVM, the equivalent impedances of the DC and AC sides in the...
This paper presents the analysis and the validation of the large signals model of a new five-level T-type unidirectional three-phase rectifier topology known as 5L T-RECT. Proposed modeling approach is mainly based on the well-known state-space averaging technique. Accordingly, to this technique, the averaging process is applied across one PWM sampling period TS, thus resulting in the basic 5L T-RECT...
This paper derives analytical models for designing inductive chargers for electric vehicles intended to be charged with only primary side charger control. Designs with series or parallel resonant capacitors on the output of the secondary winding are compared. A design optimization methodology is given for component selection and maximizing converter efficiency for a range of parameters. Analysis of...
In this paper, a novel 3-phase AC/AC modular multilevel converter is presented and analyzed. Characteristic diagrams obtained from an analytic simulation model are shown in order to discuss the circuit's properties and how it can be used to advantage. The converter is compared to the M2LC in back-to-back configuration as a reference topology. Needing only half the number of modules, its energy storage...
This paper describes a comparative analysis between two topologies of operational amplifiers to design a 40 MS/s 12-bit pipeline analog to digital converter (ADC). The analysis includes AC and transient simulation to select the proper topology. This ADC is implemented in a 0.35 mum AMS CMOS technology with 3.3 V single power supply. The capacitors and selected operational amplifiers were scaled for...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
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