Tecciencia https://tecciencia.ecci.edu.co/index.php/TECCIENCIA <p><em>TECCIENCIA</em> is a bi-annual journal concerned with the different problems that science and engineering are facing nowadays. This journal was created in 2006 as a tool to share some of these results with an increasing audience that is interested in finding out about the advances in engineering in Colombia. We are currently moving towards reaching a broader, international audience in order to make a deeper contribution to our scientific understanding of the world. This journal is intended as a medium for publishing highly innovative, high-impact results. Our scope is broad and includes many topics of increasing interest regarding environmental, mechanical, electronics, biomedical, process, electric, software, energy engineering and applied sciences.</p> Universidad ECCI en-US Tecciencia 1909-3667 Shading simulation for two photovoltaics solar generation residential systems (SPV) using SAM (System Advisor Model) https://tecciencia.ecci.edu.co/index.php/TECCIENCIA/article/view/102 <p>In this document, shading models are developed for photovoltaic solar generation systems located in two environments, a rural one, in the Cundiboyacense savanna, and the other one within the con-urban area of the Colombian capital. Both systems consider a typical electrical load for an average home. The photovoltaic generation systems and their components are dimensioned based on this estimation, for which, in this case, there are not considered any battery energy storage system. Shading on the panels is done using SAM, inserting objects of considerable height in both environments. The results of this modeling confirm that indeed, power losses are greater when considering the area of panels affected by shade. Therefore, a comparative simulation case is presented for the two considered environments, including and excluding losses due to the effect of shading, and the respective conclusions for this research are finally written.</p> Daniela Nolasco Sebastian Solis Copyright (c) 2021 Tecciencia 2021-02-24 2021-02-24 16 30 15 34 Operation of DC Motor with Multi-Level Inverter in PWAM Method https://tecciencia.ecci.edu.co/index.php/TECCIENCIA/article/view/99 <p>DC motor control with switching methods is an interesting devise with many<br>practical applications. A DC-DC buck-boost converter is one of the methods used to operate the DC motor. Although the-DC buck-boost converter for dc motor applications has been widely studied, they have some handicaps. In this study, the multi-level inverter structure that is different from the methods of DC motor driving is used to drive the DC motor. There will<br>be no passive elements in the proposed circuit although the dc-dc converters have passive elements. So, while the inadequacies for the loads needing high current will be eliminated, the handicaps of the switching can be<br>avoided. Current, torque, and voltage on the load will also be created by Pulse Width Amplitude Method (PWAM). As a different from other Pulse width modulation methods (PWM); the torque, current, and voltage of the<br>motor can be controlled with PWAM in the horizontal and vertical axes. In the design stage; inverter switch structure and operation are given after the method of produced PWMs introduced. The equations of the voltages<br>that will occur in the loads are created according to the working structure of the switches. DC motor structure is also given. In the simulation stage; Continuous and discontinuous modes of the proposed circuit are performed.<br>Then torque of dc motor, armature current and speed are tested according to switching at different frequencies and different modulation indices.</p> Erol Can Copyright (c) 2021 Tecciencia 2021-02-17 2021-02-17 16 30 1 14