Feedforward and Feedback DC Motor Control Methods of Control Systems

At metallurgical enterprises, slab transfer devices are widely used, the principle of operation of which is to lift slabs in the steel casting area and transport them to the storage area. The article considers the existing control system of the slab transfer device. At the moment, the mechanism has a DC motor controlled by a thyristor Converter. This system is difficult to maintain and has a large size. As an upgrade, the installation of an asynchronous motor with a frequency Converter is proposed. In the Matlab environment, mathematical models of single-circuit and double-circuit DC motor control systems and a model of asynchronous motor with a short-circuited rotor have been developed. A vector control system is used as an AC motor control system. As a result of simulation performed analysis of the characteristics. As an optimization of the system with vector control, in order to reduce dynamic loads on the turntable, it is proposed to introduce an intensity setter into the system, the use of which provides the necessary restriction of accelerations and jerks, reduces shock loads on the mechanical components of the electric drive, including a reduction in the load on the turntable when lowering the slab.

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Design of discrete integral variable structure control systems and application to a brushless DC motor control

Automatica ◽

10.1016/0005-1098(95)00197-2 ◽

1996 ◽

Vol 32 (5) ◽

pp. 773-779 ◽

Cited By ~ 28

Author(s):

Tzuen-Lih Chern ◽

Chin-Wen Chuang ◽

Rong-Lin Jiang

Keyword(s):

Motor Control ◽

Control Systems ◽

Variable Structure Control ◽

Variable Structure ◽

Dc Motor ◽

Brushless Dc Motor ◽

Structure Control ◽

Brushless Dc ◽

Dc Motor Control

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Comparative analysis of thyristor schemes of marine DC motor control

VESTNIK OF ASTRAKHAN STATE TECHNICAL UNIVERSITY SERIES MARINE ENGINEERING AND TECHNOLOGIES ◽

10.24143/2073-1574-2020-2-111-119 ◽

2020 ◽

Vol 2020 (2) ◽

pp. 111-119

Author(s):

Sergey Vladimirovich Golovko ◽

Artem Vladislavovich D'yachenko ◽

Nickolay Gennadievich Romanenko

Keyword(s):

Motor Control ◽

Electric Drive ◽

Single Phase ◽

Speed Control ◽

Dc Motor ◽

Control Methods ◽

Dc Motors ◽

Reverse Converter ◽

Three Phase ◽

Dc Motor Control

The article considers the problem of the DC motors control that are often used in many electric drive systems. Due to the progress of industrial electronics and technology it has become possible to develop more efficient motor control circuits. The conventional speed control methods commit power losses in the system, which can be minimized by using the power electronics strategy. There is considered the thyristor control of DC motors of the ship electric drive. The DC motor control systems are described and simulation models in the MATLAB Simulink program are presented. The thyristor methods for controlling a DC motor speed are listed: single-phase semi-controlled converter (for motors with power up to 15 kW); single-phase drive with a controlled converter (available to operate in two quadrants); three-phase semi-controlled converter; three-phase controlled converter; single-phase reverse converter realized by connecting two single-phase converters (ensuring multi-mode operation); three-phase reverse converter realized as a single-phase converter. The mechanical characteristic of a DC motor was illustrated when the voltage supplied to the armature winding changed. It has been stated that control of the armature voltage is more favorable for speeds below the rated speed; flow control is preferable for speeds above the nominal speed. It has been inferred that speed control by means of power electronics devices provides large energy savings, in contrast to the traditional speed control methods, since the traditional methods experience significant energy losses.

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Laboratory stand with wireless interface for investigation of automatic control systems of dc electric drives

Electrical Engineering and Power Engineering ◽

10.15588/1607-6761-2020-3-3 ◽

2021 ◽

pp. 24-36

Author(s):

Е.М. Kulynych ◽

O.S. Nazarova ◽

D.V. Goncharov ◽

S.G. Chernyshev ◽

V.V. Piskun

Keyword(s):

Motor Control ◽

Control System ◽

Automatic Control ◽

Control Systems ◽

Dc Motor ◽

Electric Drives ◽

Automatic Control Systems ◽

Transmission Of Information ◽

Dc Motor Control ◽

Wireless Interface

Purpose. Development of a laboratory stand with a wireless interface for the study and research of automatic control systems for DC electric drives. Methodology. Physical experiment on the developed laboratory bench, computer modelling, calculation and analytical methods. Findings. The study considered and analyzed the advantages and disadvantages of existing developments of laboratory stands with virtual and remote components, the possibility of organizing a wireless interface, taking into account cost-effectiveness, mobility, reliability and simplicity, as well as the possibility of using as a training stand. The connection of the stand by means of USB and Wi-Fi is developed. The STM32F103C8T6 microcontroller is used for the power switch and the automatic control system. The interface part consists of a NodeMCU board, a MicroSD card module, an interface control unit, a 16x2 LCD and an I2C converter. The UART-USB interface is used for information transfer and programming of the stand. The possibility of current remote transmission of information about the modes and parameters of the engine to a computer with a browser output by installing the Wi-Fi module ESP8266MOD. A closed system of automatic DC motor control with PID current regulators and EMF has been developed. Experiments were performed with a pulse and smooth increase in motor speed and variation of the components of the PID controllers using the control panel of the laboratory stand. All graphs of the results of the experiment were obtained on a web page with a fixed IP address in the browser via Wi-Fi. Originality. The structure of the remote monitoring and control system based on hardware and software combination of telecommunication and measuring systems is proposed and developed, which differs from the existing ones by the presence of current wireless transmission of information, which allows to remotely receive research data of automatic DC motor control systems. Practical value. The developed laboratory stand with the wireless interface allows to receive and store experimental data on parameters of the investigated engine in real time remotely.

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