نتایج جستجو برای: third harmonic injection
تعداد نتایج: 444746 فیلتر نتایج به سال:
This paper investigates the lock range of injection-locked non-harmonic oscillators using a frequency-domain approach. By representing a non-harmonic oscillator with a set of harmonic oscillators, the intrinsic relation between the lock range of the harmonic oscillators and that of the non-harmonic is obtained. We show that non-harmonic oscillators exhibit a larger lock range as compared with h...
This paper presents the design and analysis of a parallel connected inverter configuration of. The configuration consists of parallel connected three-phase dc/ac inverter. Series resistors added to the inverter output to maintain same current in each inverter of the two parallel inverters, and to reduce the circulating current in the parallel inverters to the minimum. High frequency third harmo...
The injection of a seed in a free-electron laser (FEL) amplifier reduces the saturation length and improves the longitudinal coherence. A cascaded FEL, operating in the high-gain harmonic-generation regime, allows us to extend the beneficial effects of the seed to shorter wavelengths. We report on the first operation of a high-gain harmonic-generation free-electron laser, seeded with harmonics ...
background and aim: the third stage of labour is one of the most troublesome stages of child delivery. the basic principle of the third stage management is administrating prophylactic uterotonics. however, the time of its administration varies in different hospitals. this study aimed to determine the effect of intramuscular oxytocin injection after emergence of the fetal anterior shoulder or pl...
This paper analyzes the way to increase the energy efficiency of three phase converters applied to control AC motor drives, through the reduction of the total harmonic distortion (THD) of the output voltage and the reduction in the switching losses in the PWM inverter. The aim is to develop a system which selects the most adequate modulation technique required to simultaneously optimize the har...
The reverse conduction capability of MOSFETs is beneficial for the efficiency a three-phase inverter. In this article, analytical expressions in closed form are presented which allow to quickly evaluate losses, considering effect conduction, and blanking time both sinusoidal pulsewidth modulation operation with without third harmonic injection. losses silicon carbide MOSFET inverter suitable tr...
This paper applies the emerging hybrid active third-harmonic current injection converter (H3C) to battery energy storage system (BESS), forming a novel H3C-BESS structure. Compared with commonly used two-stage VSC-BESS, proposed has capability reduce passive components and switching losses. The operation principle of is analyzed mathematical model derived. closed-loop control strategy controlle...
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