Circuito de arranque suave para un motor monofásico de corriente alterna conectado a un Sistema Fotovoltaico

Abstract

This work presents the study of a circuit used as a Soft Starter for a single-phase AC motor connected to a photovoltaic system. The direct start of a motor connected to an inverter activates its protection because it is not able to withstand the current that the motor demands in its start, that is why a technique is proposed that minimizes and eliminates the high peaks of current that generate Currently there are soft starters or frequency variations and other soft start techniques that are used for three-phase motors, what is required for this case is a soft starter for single phase motors. The circuit used as a test for Soft Starter allows performing the phase control by varying the firing angle. The photovoltaic system with which the soft starter tests were carried out has an inverter of 1,500 W to which a single-phase motor of a quarter of Hp was connected. Measurements were made with a digital multimeter, a hook Wattmeter, a digital oscilloscope and a washing machine motor. The main bases for the development of Soft Starters are left connected to a photovoltaic inverter for the start of single-phase motors.

Implementation of the Three-Phase Inverter of Medium Power for Applications in Photovoltaic Pumping Systems Avoiding Oversizing

“…There are several methodologies focused on the correct calculation of the system when a motor is used as a load, as is the case of the photovoltaic pumping system, which range from complex control techniques to additional circuits to the elementary components of the system. For example, Bravo-Tapia et al [22] proposed that the starting current reduction is carried out by using an additional regulator circuit. Integrating extra topology causes the cost to rise, reliability to drop, and system lifetime to suffer.…”