scholarly journals Investigation of the electric drive system of the lifting unit with parallel coordinate correction

2021 ◽  
Vol 315 ◽  
pp. 03028
Author(s):  
Sergey Reshetnyak ◽  
Yuriy Maksimenko ◽  
Alla Zakharova
Keyword(s):  
Energy Efficiency ◽  
Coal Mining ◽  
Electric Drive ◽  
Mathematical Description ◽  
Block Diagram ◽  
Drive System ◽  
Electric Drive System ◽  
Coordinate Correction ◽  
Underground Method

In the presented publication, the issues of improving the energy efficiency of the electric drive system, in relation to mine lifting installations, are considered. A block diagram of the electric drive system of a mine lifting installation with parallel coordinate correction is considered, as well as a mathematical description of the presented system. It should be noted that the conducted research will significantly affect the improvement of the level of safety and accident-free operation of the mine lifting plant, which will increase the competitiveness of coal mining by underground method.

scholarly journals An energy efficient electric drive of air units

2021 ◽  
pp. 18-25
Author(s):  
I.M. Kotsur ◽  
A.V. Hurazda ◽  
B.A. Dolia ◽  
L.E. Shestov
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Energy Performance ◽  
High Accuracy ◽  
Drive System ◽  
Rational Selection ◽  
Asynchronous Electric Drive ◽  
Electric Drive System ◽  
Aerodynamic Parameters ◽  
Selection Of

Purpose. Improving the efficiency and energy performance of an asynchronous electric drive for stationary fan’s units of the main ventilation line of mines. Methodology. The research was carried out using the methods of the theory of electrical circuits, mathematical physics, simulation, interpolation and approximation Findings. The research of electromagnetic and energy processes in the asynchronous electric drive system with pulse control at a fan load, taking into account the variable aerodynamic parameters of the main ventilation line of mines. An electric drive system is able to respond with high accuracy and reliability to changes in the aerodynamic parameters of the main ventilation line of mines has been proven. This will also increase the power factor of the electric drive at a fan load up 0.8 to 0.93 p.u., and the efficiency up 92.5% to 94.5%, when regulating in the range of the operating slip of the rotor of the drive fan motor = 0.5 ÷, which, respectively, is on average up 0,25% to 40 higher in comparison with systems of an unregulated electric drive. Recommendations has been developed for the design and rational selection of the rated fan capacity for the main ventilation line to advance the best energy efficiency level of the electric drive. Originality. The research of electro-mechanical, electro-energy power and aerodynamic processes in the dynamic modes of the fan electric drive was carried out. The fan-loaded "induction motor-converter" system has been proven to be self-regulating. It is able to respond with high accuracy and reliability even at low switching frequencies of the power chopper to any changes of the aerodynamic parameters of the main ventilation line of mines. Practical value. Recommendations has been developed for the design and rational selection of the rated fan capacity for the main ventilation line to advance the best energy efficiency level of the electric drive.

scholarly journals Preface for Special Issue on Electric Drive System for Vehicles

2021 ◽  
Vol 4 (1) ◽  
pp. 1-2
Author(s):  
Xiangyang Xu ◽  
Guangyu Tian ◽  
Hui Liu
Keyword(s):  
Electric Drive ◽  
Drive System ◽  
Special Issue ◽  
Electric Drive System

scholarly journals Optimization of TSPWM for Common-Mode Voltage Reduction in Vehicular Electric Drive System

2021 ◽  
Vol 13 (1) ◽  
pp. 5
Author(s):  
Shang Jiang ◽  
Yuan Wang
Keyword(s):  
Electric Drive ◽  
Drive System ◽  
Modulation Method ◽  
Time Interval ◽  
Common Mode ◽  
Common Mode Voltage ◽  
Electric Drive System ◽  
The Common ◽  
Modulation Methods ◽  
Zero Voltage

Common-mode voltage can be reduced effectively by optimized modulation methods without increasing additional costs. However, the existing methods cannot satisfy the requirements of the vehicular electric-drive application. This paper optimizes the tri-state voltage modulation method to reduce the common-mode voltage for vehicular electric drive system applications. Firstly, the discontinuous switching issue during sector transition is analyzed. Under the limit of two switching times in one period, multiple alignments combination is proposed to address that issue. Secondly, the zero-voltage time intervals in different modulation ranges are explored. This paper proposes an unsymmetric translation method to reconstruct the voltage vector, and then the minimum zero-voltage time interval is controlled to enough value for safe switching. Finally, the proposed methods have been validated through experiments on a vehicular electric drive system. The results show that the common-mode voltage can be reduced effectively in the whole range with the optimized tri-state voltage modulation method.

Sign in / Sign up

Export Citation Format

Share Document