Authors: I.A. Sokolov

Title of the article: Influence soft starter asynchronous motors Employment power supply systems

Year: 2016, Issue: 3, Pages: 72-78

Branch of knowledge: Electrical engineering

Index UDK: 621. 314.522, 621.316.717

DOI: -

Abstract: The urgency of the discussed issue: The issues of direct power connection mode the squirrel-cage induction motors covered extensively, and the negative effects of direct connection is so serious, that there are many devices today, intended to solve this problem. For non-controlled asynchronous electric drives the most widely used devices called Soft Starter and unstressed start device, which allow to change the value of the supply voltage of induction motor. However, these devices are not without disadvantages. The main source of problems is the impact of the work of power semiconductor switches on the character of change of voltage and current in the power cabling, and through it to the work of other consumers in the same power supply system. So the issue, of evaluating soft starter possible negative impact to the work of other consumers in the same power supply system, is actual The main aim of the study: Forecast and analysis of dynamic processes, occurring in the induction motors in the same power supply system for induction motors sequential start modes. A comparison of the dynamics (mechanical and electrical components) of the two induction motor start technologies: direct power connection mode and connection with soft starter. The methods used in the study: Based on the use of a mathematical model of electromechanical system 3-phase IM, extended branched cable network and soft starter. Simulation models are implemented by means of MatLab (SimuLink). The results: Demonstrate the main differences between the two tech start-up of induction motors and comparative analysis of their impact to the work of other consumers in the same power supply system.

Key words: 3-phase asynchronous motor start mode the soft starter mutual influence through the power supply system

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