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Interleaved switching of parallel inverters has previously been proposed for efficiency/size improvements of grid connected three-phase inverters. This paper proposes a novel interleaving method which practically eliminates insulated gate bipolar transistor (IGBT) turn-on losses and drastically reduces diode reverse recovery losses. The reduction in switching losses are obtained by interleaving two...
The transmission path of the Conduction Interference is proposed after analyzing the converter valve's mechanism of the noise emission. Using the Fourier transformation theory to get the spectrum of the converter's Common mode voltage and Differential mode voltage by the two different modulation methods (SPWM and SVPWM), as well as the dead time affects on the Emission. It's conclude that the IGBT's...
In this paper, a novel ZCS-PWM control method for micro-turbine excitation control system is proposed. The method of main circuit parameters design is developed. And the timing of the main switch and the assistant switch in main circuit is calculated for achieving the excitation control in double IGBTs switching mode. The application in real world proves that switching loss is greatly reduced by using...
This paper presents a new approach for increasing the power capability of standard two level voltage source inverters while increasing the effective PWM frequency by sequential switching of parallel connected inverters. The improved power capability and increased PWM frequency is used for an electrical test bench to test drive inverters under real power conditions. Thereby the parallel connected inverters...
This paper proposes a new digital average current mode control method (AVCMC). Instead of sampling and summing the transformer primary current over the switching period, the average is calculated merely using two current values. Analysis of the primary current shape allows a simplified equation to be derived for the digital AVCMC. The method is adoptable in cases where current is growing linearly...
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...
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