Abstract
This article describes a correction mechanism for balancing torques in moving drives. The steering system is controlled by a programable logic controller (PLC), a field-oriented control (FOC) algorithm in the drive inverter system, Process Fieldbus (PROFIBUS), and a Decentralized Peripherals (DP) network. The mechanism was applied in an opencast mining stacker with an induction motor and converter drive system. The mechanism was realized using SIMOLINK (Siemens Motion Link, SL) via fiber optic cables. Motor torque correction was applied in each electrical drive of the stacker machine. The main results presented in this paper were obtained directly from the machine. Selected digital control problems related to open mining stackers are discussed.
Highlights
Modern automated drive systems, in which the induction motors are powered by converter systems, have gradually displaced DC motors in most applications [1,2]
The most modern drive systems are controlled with the help of digital signal processors (DSP) and modern steering algorithms [3,4]
In the chosen open mining machine, an analog control technique was replaced with a digital control system, based on a programable logic controller (PLC) controller, industrial communication networks (PROFIBUS, SIMOLINK), and inverter drive systems (Siemens SIMOVERT MasterDrives Vector Control) [5]
Summary
In which the induction motors are powered by converter systems, have gradually displaced DC motors in most applications [1,2]. The majority of engineering machines are equipped with inverter drive systems containing induction AC motors. The main advantages of using these motors in modern drive systems are simplicity of design, lower cost, and high reliability. The most modern drive systems are controlled with the help of digital signal processors (DSP) and modern steering algorithms [3,4]. In the chosen open mining machine, an analog control technique was replaced with a digital control system, based on a PLC controller, industrial communication networks (PROFIBUS, SIMOLINK), and inverter drive systems (Siemens SIMOVERT MasterDrives Vector Control) [5]. The technical and technological parameters of the stacker, its scope of work, and details of its performance, as well as assessments its safety level, stability, and operationality, have been discussed in numerous publications e.g., [7,8]
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