This study aims to derive simple formulas for calculating the accurate Total Harmonic Distortion (THD) of Multilevel Inverter (MLIs), that considers all low and high order harmonics, for single phase and three phase MLIs., since the THD is a main criterion when judging the performance of a MLI. In addition, a formula for the percentage route mean square value of high order harmonics %VHOrms is ...

Minimum Total Harmonic Distortion (THD) is one of the most important requirements from multilevel inverter concerning good Power Quality. This paper presents the optimization of THD in 13 level Cascaded Multilevel Inverter with unequal dc source using Genetic Algorithm (GA). THD minimization is taken as an optimization problem derived from Selective Harmonic Elimination Pulse width Modulation (...

In this paper a new approach for design of class-AB current-mode square-root domain filters based on the electronically simulated translinear loop principle is presented. FG-MOS transistors that operate in strong inverted saturation region are employed for implementation of translinear loop circuit. The filter achieves immunity to body effect, low circuit complexity, large input dynamic ran...

Designers of quality audio equipment have long recognized the value of a low noise gain block with “audiophile performance”. The LM833 is such a device: a dual operational amplifier with excellent audio specifications. The LM833 features low input noise voltage typical), large gain-bandwidth product (15 MHz), high slew rate (7V/μSec), low THD (0.002% 20 Hz-20 kHz), and unity gain stability. Thi...

Gliomas are primary brain tumors associated with a poor prognosis partly due to resistance to conventional therapies. To overcome this problem, we investigated the combined effects of gamma knife radiosurgery (GKS) and an antiangiogenic agent, thalidomide (THD), or a chemotherapeutic agent, temozolomide (TMZ), on a rat glioma model. GKS (20 Gy single dose) alone and/or drugs (for 3 days) were d...

BACKGROUND Transanal hemorrhoidal dearterialization (THD), a new approach for patients who would otherwise require an operative hemorrhoidectomy, accomplishes hemorrhoidal symptom relief with far less postoperative pain than an operative hemorrhoidectomy. METHODS THD, an ambulatory procedure, employs a specially designed proctoscope coupled with a Doppler transducer to allow identification an...

The total number of switching pulses permitted in one-quarter the fundamental-cycle an inverter is restricted due to restrictions losses high-power devices. elimination major low-order dominating harmonics using SHEPWM (Selective Harmonic Elimination) suggested this research paper. positive or negative voltage transition at instant where fundamental has greatest slope distinguishes various type...

In this paper, a comparative analysis of Total Harmonic Distortion (THD) between wind farms with double-fed induction generators (DFIG) and synchronous permanent magnet (PMSG) integrated into the grid is developed. The Fast Fourier Transform (FFT) technique to evaluate output current signal THD in different fault conditions indicate best performance among used. generation problems are associate...