Keywords
electric drive
three-phase asynchronous motor
safe control
inverter
bridge circuit
efficiency
pulse width modulation
transistors with isolated gate
small-sized relays
mechanical circuit opening
How to Cite
Abstract
In this article, features of using bridge converter circuits to control AC motors in railway automation computer systems are discussed. Special attention is paid to evaluating the efficiency of converter circuits. It is shown that utilizing low-frequency operation modes of power switches can significantly increase converter efficiency as part of the coupling devices. A technical solution is proposed for implementing five-wire AC motor control circuits consisting of a five-phase bridge conversion circuit. A brief overview of the modern element base used to construct inverters is provided, along with an assessment of electronic components from the perspective of analogous device selection potential. Additionally, the use of electromagnetic relays as functional converters is considered, providing increased reliability and electrical safety.
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