scholarly journals Features of an induction motor design taking into account the possible operation in the mode of electrical asymmetry of the windings resistances

2021 ◽  
Vol 2061 (1) ◽  
pp. 012047
Author(s):  
E O Lavrenov ◽  
Z S Temlyakova ◽  
M E Vilberger ◽  
D M Toporkov ◽  
A A Temlyakov ◽  
...  
Keyword(s):  
Induction Motor ◽  
Electric Drive ◽  
Power Supply ◽  
Induction Motors ◽  
Continuous Production ◽  
Production Cycle ◽  
Electromagnetic Torque ◽  
Operating Modes ◽  
Motor Design ◽  
Theoretical Foundations

Abstract The paper examines the operation of large high-voltage induction motors used as an electric drive of critical installations in enterprises with a continuous production cycle. The theoretical foundations of the appearance of a dip in the mechanical characteristic of an induction motor in the mode of winding resistances asymmetry are considered. The developed power supply device for an induction motor with torque dip compensation at electrical asymmetry of phase windings appears is presented. The necessity of introducing a service factor is formulated to take into account the decrease in the total level of the electromagnetic torque in such operating modes, which is carried out at the stage of the motor design beginning.

Starting Processes in Electric Drive of a Passenger Elevator

2021 ◽  
Vol 1 (1) ◽  
pp. 40-49
Author(s):  
S. Rachev ◽  
K. Dimitrova ◽  
D. Koeva ◽  
L. Dimitrov
Keyword(s):  
Coordinate System ◽  
Induction Motor ◽  
Electric Drive ◽  
High Speed ◽  
Induction Motors ◽  
Dynamic Loads ◽  
Design Stage ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Electric Induction

During the operation of electric induction motors used to drive passenger elevators, electro-mechanical transient processes occur, which can cause unacceptable dynamic loads and vibrations. In this regard, research is needed both at the design stage and for operating elevator systems to determine the arising impact currents and torques, in order to propose solutions for their limitation within pre-set limits. Paper deals with starting processes in a two-speed induction motor drive of a passenger elevator. The equations for the voltages of the induction motor are presented in relative units in a coordinate system rotating at a synchronous speed. The values have been obtained for the torques, the rotational frequencies and the currents when starting at a high speed and passing from high to low speed.

scholarly journals Windings Design for Single-phase Induction Motors Base on 4-phase Induction Motor (Case study: identical windings design)

2018 ◽  
Vol 215 ◽  
pp. 01023 ◽  
Author(s):  
Zuriman Anthony ◽  
Erhaneli Erhaneli ◽  
Zulkarnaini Zulkarnaini
Keyword(s):  
Induction Motor ◽  
Power Factor ◽  
Single Phase ◽  
Induction Motors ◽  
Three Phase ◽  
Motor Design

A 1-phase induction motor usually has a complicated windings design which compares to polyphase induction motor. In addition, a large capacitor start is required to operate the motor. It is an expensive way to operate the motor if it compare to polyphase induction motor. So, a new innovation method is required to make the motor more simple and cheaper. This research is purposed to study a new winding design for a single-phase capacitor motor. Winding design of the motor was conducted to a simple winding design like a 4-phase induction motor that has four identical windings. The comparator motor that use in this study was a Three-phase induction motor with data 1400 RPM, 1.5 HP, 50Hz, 380/220V, Y/Δ, 2.74/4.7A, 4 poles, that had the same current rating which the proposed method. The result showed that the motor design on this proposed method could be operated at 88.18 % power rating with power factor close to unity.

scholarly journals The development of an energy efficient electric drive for agricultural machines

2022 ◽  
Vol 1211 (1) ◽  
pp. 012018
Author(s):  
T M Khalina ◽  
S Yu Eremochkin ◽  
D V Dorokhov
Keyword(s):  
Induction Motor ◽  
Electric Drive ◽  
Single Phase ◽  
Induction Motors ◽  
Semiconductor Device ◽  
Squirrel Cage ◽  
Squirrel Cage Induction Motor ◽  
Three Phase ◽  
Cage Induction Motor ◽  
Agricultural Machines

Abstract Agriculture is a socially significant sector of the economy. The growth of agricultural production contributes to the stable development of society. It is necessary to use new mechanisms driven by induction motors to increase agricultural productivity. Three-phase induction motors are mainly used in the electric drive of agricultural machines. At the same time, it is advisable to use a single-phase network to supply power to remote farms. In this regard, the development of a single-phase electric drive using three-phase motors becomes relevant. In this work, a study of an original semiconductor device for starting a three-phase induction motor from a single-phase network is made. The simulation model of the device created in the Matlab Simulink environment made it possible to study the electromechanical characteristics of the induction motor when operating from a single-phase network. A comparison of the characteristics of the motor during operation from a three-phase and a single-phase network is carried out. The most significant results of the work are the data obtained that the developed device can be used to start and operate a squirrel cage induction motor from a single-phase network. At the same time, the engine energy parameters change slightly.

scholarly journals Simulation of Electric Drive With Direct Torque Control of Induction Motor

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Yuri M. Inkov ◽  
Andrey S. Kosmodaminskiy ◽  
Alexander A. Pugachev ◽  
Elena V. Sachkova
Keyword(s):  
Induction Motor ◽  
Electric Drive ◽  
Induction Motors ◽  
Direct Torque Control ◽  
Torque Control ◽  
Voltage Source ◽  
Voltage Source Inverters ◽  
Electric Drives ◽  
Traction Electric Drive ◽  
Traction Drives

The main requirements for traction electric drives are listed and discussed. The direct torque control of an induction motor electric drive is established by a survey of operation modes of traction electric drives to thoroughly satisfy the requirements for traction electric drive. The topologies and operation principles of two-and three-level voltage source inverters are presented. The advantages and shortcomings of three-level voltage source inverters to be applied on locomotive traction drives are highlighted in relation to the two-level ones. The recommendations of choice between different voltage source inverter topologies are given. The topology and principles of operation of direct torque control of induction motors with two- and three-level voltage source inverters are described. The simulation peculiarities of electric drives with direct torque control and two- and three-level inverters in Matlab are considered. The simulation results are presented. The techniques to reduce the torque oscillations are shown and implemented in Matlab Simulink.

scholarly journals Multiple three-phase induction motors connected to a zigzag transformer

2021 ◽  
Vol 3 (1) ◽  
pp. 8-14
Author(s):  
Abdelhafiz Zeiada ◽  
Ngu Eng Eng ◽  
Moataz Saad Balla
Keyword(s):  
Induction Motor ◽  
Power Supply ◽  
Induction Motors ◽  
Research Work ◽  
Voltage Supply ◽  
Excessive Heat ◽  
Network Connections ◽  
Three Phase ◽  
Unbalance Voltage ◽  
Three Phases

Many experiments have been conducted in this research work which is (i) connecting a zigzag transformer with an induction motor, (ii) connecting a zigzag transformer with multiple induction motors, and (iii) connecting multiple zigzag transformers with multiple induction motors. These experiments provide a thorough understanding of the sequence network connections under the single-phasing condition of a three-phase induction motor. Moreover, these experiments protect the three-phase induction motors from unbalancing voltage supply and allow the induction motor to start under unbalance voltage supply. Additionally, they keep the three-phase induction motor running even any one of the three phases disconnected from the power supply without creating excessive heat in the motor winding.

scholarly journals ANALYTICAL METHOD FOR DETERMINING OPTIMAL PARAMETERS AND SCHEMES FOR VOLTAGE-REGULATED INDUCTION MOTORS WITH SINGLE-PHASE POWER SUPPLY

2021 ◽  
Vol 2021 (59) ◽  
pp. 56-63
Author(s):  
Yu.V. Shurub ◽  
◽  
Yu.L. Tsitsyurskiy ◽  
Keyword(s):  
Induction Motor ◽  
Power Supply ◽  
Analytical Method ◽  
Single Phase ◽  
Induction Motors ◽  
Operating Mode ◽  
Phase Shifting ◽  
Optimal Parameters ◽  
Three Phase ◽  
The Relationship

On the basis of the method of symmetric components, an analytical method is proposed for calculating the coefficients that determine the relationship between the components of the positive and negative sequences of the parameters of the operating mode of an induction motor and the parameters of its power supply for some circuits for the inclusion of voltage-controlled three-phase induction motors with phase-shifting capacitors powered by a single-phase network. On the basis of this technique, the optimal parameters of phase-shifting capacitors can be determined and rational schemes for connecting three-phase induction motors to a single-phase network can be selected. Ref. 7, fig. 3, tables 2.

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