Analysis of the effectiveness of using state observers in the control system of the traveling mechanism of the bridge crane trolley

This article discusses the frequency control systems of an asynchronous electric drive with various types of observers that are promising for the movement mechanism of the bridge crane trolley. As a result of the analysis of existing control systems for asynchronous motors, it was revealed that the most relevant for use at the object under consideration is a system with direct torque control. To improve the classical control system, it is proposed to introduce a state observer into it. Sensorless control systems, in comparison with other systems, make it possible to reduce the dimensions of both a separate mechanism and the device as a whole, and reduce its cost. The use of observers leads to an increase in the reliability of an object without complicating its design. For the functioning of systems of this type, only data from the current and voltage sensors built into the frequency converter are used.