This paper presents a power factor correction (PFC) based canonical switching cell (CSC) converter-fed brushless dc motor (BLDCM) drive for low-power household applications. The speed of BLDCM is controlled by varying the dc-bus voltage of voltage source inverter (VSI). The BLDCM is electronically commutated for reduced switching losses in VSI due to low-frequency switching. A front-end CSC con...

In this paper, computer simulation of a three-phase synchronous motor drive is described. This drive/system is supplied with a new type of pulse-width modulated voltage source inverter (PWM VSI) whose amplitude of the first harmonic, compared to a conventional sinusoidal PWM VSI, is increased by about 17% and whose amplitude of higher harmonics is also reduced inversely proportional to their or...

Voltage source inverter (VSI) had been used in dc traction power substation to deliver the trains braking energy back utility grid. To mitigate low order harmonics components, pulse-width-modulation (PWM) technique is commonly VSI controlled. As a result, ac voltage and current waveforms may contain high frequency ripples. This paper proposes using LCL-filter with series <em>R</em>-...

In this paper a novel modular digital control algorithm for multi level inverters is introduced and discussed. This algorithm is essentially based on the duty cycle expression and allows a great simplification, because of its modularity and its simple implementation. The algorithm is particularly suitable for the Multi Point Clamped (MPC) inverters with no constraint on the number of the voltag...

Recent advances in the power system handling capabilities of static switches have made the use of the voltage source inverter (VSI) feasible at both transmission and distribution levels.

The interconnection of distributed energy resources (DERs) in microgrids (MGs) operating both islanded and grid-connected modes require coordinated control strategies. DERs are interfaced with voltage source inverters (VSIs) enabling interconnection. This paper proposes a load demand sharing scheme for the parallel operation VSIs an inverter-based microgrid (VSI-MG). ride-through capability hea...

In this paper, a comparative analysis is obtained to analyse the performances of two-level conventional and three-level diode clamped voltage source inverter-based drives. Carrier-based space vector modulation technique employed in both & inverter (2L-VSI)-based Comparative study for 2L-VSI, neutral-point-clamped (3L-NPC) T-type (3L-TNPC) inverters are performed view conduction switching losses...

The authors propose a technique for reactive power compensation using powerful regenerative controlled-speed synchronous motor drive (SMD) based on three-level (3L) neutral point clamped (NPC) active front-end rectifier (AFE) and voltage source inverter (VSI). review of technical solutions showed that the limitations transmitted in system under consideration still have not been studied. paper p...

In statistical process control (SPC), the ratio of two normal random variables (RZ) is a valuable indicator to be taken as charting statistic. this work, we propose triple exponentially weighted moving average (TEWMA) chart for monitoring RZ. Additionally, variable sampling interval (VSI) strategy has been adopted different charts by researchers. With application strategy, VSI-TEWMA-RZ then dev...

BACKGROUND AND AIM Pain and nausea are often reported during bowel cleansing (BC) for ileocolonoscopy (IC). We aimed to explore putative mechanisms associated with impaired tolerance to BC. METHODS A 1:1 (100 IBD and 100 controls) sex and age matched case-control study was performed. Patients completed the hospital anxiety and depression scale (HADS-A/HADS-D), visceral sensitivity index (VSI)...