Cordline multi-motor electric drive with energy recovery

2020

E3S Web Conf.

Self Cite

The article deals with the problems of increasing the multi-engine electric drive energy efficiency on the example of the cropped cord production line in manufacture of tires. There are requirements for line electric drives that can have an impact both each other and the overall power grid in the mode of technological braking, as well as the requirements for the availability of protection functions and mutual coordination with the mains supply. To solve this problem, options have been developed to build reversible frequency converters on fully controlled (locked) keys as part of frequency-regulated technological electric drives in the production of cord for car tires with energy recovery. The construction of the reversible frequency converter with the use of autonomous voltage inverters, as well as the results of computer simulations in the reactor and non-reactor circuits of reversible frequency converters in the composition of multi-motor electric drives with a total DC bus are shown.

Section: Introductionmentioning

confidence: 99%

Two-way conductivity converters in the technology of tire cord rubberization

2020

E3S Web Conf.

Self Cite

Energy interaction of two-link converters of a multi-motor drive with mains supply

2021

E3S Web Conf.

It is known that the total power electrical loads consume from the mains is the sum of their two components – active and reactive. Most electric drives of modern industrial enterprises consume up to 40% of reactive energy in relation to the total energy. This results in an increased full power consumption thereby increasing the load on the supply mains. Modern electric drives are built as follows: supply mains – rectifier-direct current link-inverter – asynchronous motor. The total power consumption is at the "mains-rectifier" interface, where the required active power factor of the converter can be formed. The higher the active power factor, the lower the reactive component in the total consumed energy. Thus, the paper proposes a solution to the problem of building highly efficient converting devices for powering electric motors with the required power factor. In particular, the paper discusses possible increase in the power factor of the electric drive mains input with two-link frequency converters based on active (controlled) rectifiers with current and voltage inverters. The author proposes new ways to control active rectifiers based on the use of AC rectifying devices with fully controlled GTO, GCT thyristors, as well as pulse-width control IGBT transistors. The paper offers options for the construction of these rectifiers and the results of modeling the proposed control methods, confirming a decrease in the passive components of the mains current, and, as a consequence, an increase in the mains input power factor. The simulation results were obtained in MathLab 10, and are the basis for confirming the method of increasing the active power factor at the mains input of a controlled two-link frequency converter.

Increasing the Energy Parameters of the Mains Supply by Active Rectifiers in the Composition of Frequency Converters

2022

Vestn. Čuv. univ.

The total power consumed by electrical loads from the electric mains consists of their two components – active and reactive. Most electric drives of modern industrial enterprises operate with a reactive power index of 0.7–0.8. This leads to increased consumption of full power, which increases the load on the mains supply. Modern electric drives are built according to the principle: power supply – rectifier – DC link-inverter – asynchronous motor. Full power consumption occurs at the junction of the “power supply-rectifier”, where the required active power factor of the converter device can be formed. The higher the active power factor, the lower the reactive component in the total energy consumed. Thus, the article proposes a solution to the problem of creating highly efficient converter devices for powering electric motors with the formation of the necessary power factor, since frequency-controlled electric drives of modern mechanisms in industrial enterprises are the main consumers of electricity, which have a significant impact on the state of the supply network. The article considers the possibility of increasing the power factor of the mains input of electric drives with two-link frequency converters based on active (controlled) rectifiers with current inverters and voltage inverters. New methods of control of active rectifiers based on the use of AC rectifiers on fully controlled thyristors GTO, GCT, as well as IGBT transistors with pulse width adjustment are proposed. The variants of the construction of these rectifiers and the results of modeling the proposed control methods are presented, confirming a decrease in the passive components of the mains current, and as a consequence, an increase in the power factor of the network input. The simulation results are performed in the MATLAB 10 program, and are the basis for confirming the method of increasing the active power factor at the network input of a controlled frequency converter with a two-link structure.