The State and Prospects of Development of the Interconnected Multi-Motor Semiconductor Electric Drives

Abstract

In this chapter the retrospective analysis of the theory condition and practice of the interconnected multi-motor controlled electric drives is performed. Research and development in this field developed in the last third of the 20th century. In these years, virtually was created the interconnected multi-motor drives theory but the research majority in the field of interconnected electric drives with elastic-plastic and distributed connections is not realized. Now the construction principles of means and control systems for the interconnected electric drive with the help programmaticallyhardware functional modules are realized. These modules were created on the basis of new semiconductor converters and the logical controllers. In the future will develop the theoretical research and the practical applications on the basis of the fuzzy neural networks, including the control in the online modes, the sliding modes with use high-speed controllers. Development of new exact synchronization methods of the electric multi-motor drives will ensure the creation of a multi -motor direct-drive. New group of mechatronic objects will be created by the interconnected multi-motor electric drives which not only have the traditional feedbacks on speed, currents, tension etc., and also the feedbacks based on the technological variables of machines and mechanisms: torques, efforts, pressure, vibrations, expenses etc. Development and creation of adaptive systems which interconnected through a processed material or working body of electric drives with is elastoplastic links (which properties change in the course of work) is an actual problem. Considerable interest represents application of the fuzzy-regulation methods for the creation of the control systems by the nonlinear nonstationary interconnected electromechanical systems. Practical realization of the robust control methods for the multi-motor electric drives in the emergency situation or emergency modes is also the perspective direction

Mathematical Model of Multi-Motor Plate Conveyor Traction Body With Frequency-Controlled Electric Drive

“…Upon reaching a certain limiting increase in the pitch of the traction unit, further operation of the chain transmission cannot be possible due to a significant decrease in the safety factor of the chains, violation of the ease of movement or disturbance of engagement of the chain joints with sprockets and cams of the intermediate drives, which leads to frequent failures in the course of operation of the conveyor traction body [8]. The progress achieved in the development of power semiconductor technology, the creation of high-quality and powerful frequency converters using PWM modulation, the introduction of high-speed and high-discharge industrial controllers made it possible to use frequency-controlled AC drives for plate conveyors based on commercially available asynchronous motors for the mining industry [9][10][11][12][13][14][15].…”

Research of frequency converters energy characteristics of drilling rigs

“…Also, the benefits of this solution include: power factor at the unit level, regeneration of brake energy, autonomization in case of power failure or a significant decrease in the voltage amplitude in the grid (by providing an energy isolation of the grid and electric drive motors) [6][7][8].…”

Automatic control in multidrive electrotechnical complexes with semiconductor converters

“…In the most cases, the bases of such systems are an induction motor and a power semiconductor frequency converter. Induction motors are widely used in case of their simple construction, high reliability, low cost and the possibility of regulation of the frequency and the force moment using simple technical devices [1][2][3][4][5][6].…”