Linear electric actuator of a sectional plane shut-off of hydrotechnical structures

Abstract

The sectional design of a flat shutter with an electric drive has lower energy characteristics and improved operational and technological indicators compared to the existing ones for hydraulic structures and channels. The use of linear asynchronous electric motors in linear electric drives allows to simplify the design and reduce material consumption. Modeling of linear induction motors with various designs of the secondary element is carried out on the basis of detailed equivalent circuits for electric and magnetic circuits. Coating a massive or serrated secondary element with a layer of non-magnetic material can increase the traction performance of a linear motor. Comparison of the results of numerical modeling and physical experiments of linear induction motors with various secondary element designs for a sectional flat shutter is the most effective shielded ferromagnetic secondary element.

Simulation of linear asynchronous electric drive of slow-speed mechanisms of agricultural complex

“…Simpler models that facilitate multivariate calculations are used in machine optimization. In the future, in verification calculations, complex mathematical models are used to refine the parameters and characteristics, which allow taking into account the real operating conditions of the active parts of the machine in various modes [13][14][15][16][17][18][19].…”

“…Such drives make it possible to obtain the necessary technologically specified drive characteristics, to achieve integration with the working body while excluding mechanical converters, as a result of which material and Currently, along with the development and widespread use of induction motors with an open magnetic circuit in various areas of the national economy (metallurgy, transport, robotics, textile industry and others), they are increasingly used in agriculture, taking into account its production features and their working conditions. In [13][14][15][16][17][18], drives based on induction motors with an open magnetic circuit, developed for agricultural machines, are quite diverse in terms of power, speed, operating modes, and designs.…”

“…The main disadvantage of electric drives based on induction motors with an open magnetic circuit, which prevents their widespread introduction into production, is low energy performance due to their design features [13][14][15][16][17][18].…”

“…The set of phenomena associated with the finite length of the primary magnetic circuit and the winding zone of an induction machine with an open magnetic circuit ultimately lead to distortion of the traveling magnetic and electric field wave and have a significant impact on its characteristics [13][14][15][16][17][18][19].…”

“…Researchers use various methods to improve the energy and traction performance of electric drives based on induction motors with an open magnetic circuit [13][14][15][16][17][18][19]. Based on the analysis of publications, ways to improve the energy and traction performance of electric drives based on induction motors with an open magnetic circuit were determined (Figure 3).…”