scholarly journals Comparative Analysis of Line-start Synchronous Motor and Asynchronous Motor

2021 ◽  
Vol 69 (1) ◽  
pp. 11-18
Author(s):  
Vasilija SARAC
Keyword(s):  
Energy Efficient ◽  
Permanent Magnets ◽  
High Efficiency ◽  
Asynchronous Motor ◽  
Industrial Process ◽  
Synchronous Motor ◽  
Magnetic Flux Density ◽  
Operational Characteristics ◽  
Proper Design ◽  
Flux Density Distribution

Energy efficient motors are the key components of each industrial process. In the energy demanding society, requiring the energy efficient consumers, the line-start synchronous motor has gained more and more popularity due to the high efficiency and power factor combined with good operational characteristics. The disadvantages of the synchronous motors such as inability of starting without the inverter has been largely overcame with this type of the motor. However, the proper design of line-start motor regarding permanent magnets and the squirrel cage winding is crucial for motor starting and synchronization capability. In this paper, the line-start synchronous motor is derived from the asynchronous motor by redesigning the rotor. The obtained performance characteristics of the synchronous motor is compared with the data of the asynchronous motor (the analytical, measurements and from the motor producer) and they show reasonable agreement. The derived model of the synchronous motor is numerically modelled for obtaining the magnetic flux density distribution in the motor cross-section. The analysis and comparison is completed by obtaining the transient characteristics of both types of the motors. The designed synchronous motor has proven to have good starting and synchronization capabilities combined with the high efficiency. The dynamic response at sudden load changes is within expected limits.

Design and Experimental of High-Performance Interior PMSM with the Aid of Identical Polarization Embedding

2012 ◽  
Vol 229-231 ◽  
pp. 911-914
Author(s):  
Yue Jun An ◽  
Li Ping Xue ◽  
Zhao Jun Meng ◽  
Li Min Zhou
Keyword(s):  
Energy Saving ◽  
Permanent Magnet ◽  
High Performance ◽  
High Efficiency ◽  
Asynchronous Motor ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Chaos Optimization ◽  
Production Type ◽  
Saving Effect

This paper design an identical polarization embedding high-efficiency permanent magnet synchronous motor and analysis electromagnetic field distribution of the new structure permanent magnet synchronous motor, as well as optimize the design using modern chaos optimization algorithm based on the invention patent. Carried out analysis of energy-saving effect combination high-performance interior PMSM with the aid of identical polarization embedding in textiles with small batch production type test. The optimize design and experiment show that the new structure motor efficiency and power factor higher than the previous configuration of the asynchronous motor, and with high-efficiency and energy-saving advantages in a very broad power output range at the condition of same load.

scholarly journals Design of A Novel Line Start Synchronous Motor Rotor

Electronics ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 25 ◽  
Author(s):  
Berkan Zöhra ◽  
Mehmet Akar ◽  
Mustafa Eker
Keyword(s):  
Finite Elements ◽  
Permanent Magnets ◽  
High Efficiency ◽  
Asynchronous Motor ◽  
Industrial Applications ◽  
Permanent Magnet Synchronous Motors ◽  
Synchronous Motors ◽  
Motor Efficiency ◽  
Motor Design ◽  
And Performance

Line start permanent magnet synchronous motors (LS-PMSM) are preferred more and more in industrial applications, because they can start on their own and because of their high efficiency. In this study, a new LS-PMSM rotor typology is suggested, which is modelled using surface mount permanent magnets, in which two different slot types have been used together. The rotor of an asynchronous motor on the industrial market in the IE2 efficiency segment has been remodeled in the study, resulting in an increase in motor efficiency from 85% to 91.8%. A finite elements software was used for determining motor design and performance, in addition to analytical methods.

ENERGY-EFFICIENT ELECTRIC DRIVE ON THE BASIS OF A SYNCHRONOUS MOTOR WITH PERMANENT MAGNETS

2020 ◽  
Author(s):  
Вадим Юрьевич Бухтуев
Keyword(s):  
Permanent Magnet ◽  
Electric Drive ◽  
Energy Efficient ◽  
Permanent Magnets ◽  
Dynamic Performance ◽  
Permanent Magnet Synchronous Motor ◽  
Conveyor Belt ◽  
Synchronous Motor ◽  
Permanent Magnet Motor ◽  
Repair Costs

Использование синхронного двигателя с постоянными магнитами позволяет повысить надежность электропривода, снизить затраты на эксплуатацию и ремонт, увеличить энергоэфективность технологического процесса. Целью работы является построение системы управления синхронного двигателя с постоянными магнитами на ленточном конвейере, обеспечивающей требуемые динами-ческие показатели. В статье представлено сравнение трех систем управления и результаты моделирование в MATLAB R2019a. The use of a permanent magnet synchronous motor makes it possible to increase the reliability of an electric drive, reduce operating and repair costs, and increase the energy efficiency of the process. The aim of the work is to build a control system for a synchronous permanent magnet motor on a conveyor belt that provides the required dynamic performance. The article presents a comparison of three control systems and simulation results in MATLAB R2019a.

scholarly journals A Method for Efficiency Determination of Permanent Magnet Synchronous Motor

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 1004 ◽  
Author(s):  
Karolis Dambrauskas ◽  
Jonas Vanagas ◽  
Tomas Zimnickas ◽  
Artūras Kalvaitis ◽  
Mindaugas Ažubalis
Keyword(s):  
Permanent Magnet ◽  
High Efficiency ◽  
Asynchronous Motor ◽  
Permanent Magnet Synchronous Motor ◽  
Input Voltage ◽  
Synchronous Motor ◽  
Utilization Rate ◽  
Efficiency Coefficient ◽  
Testing Procedures ◽  
Efficiency Determination

The utilization rate of permanent magnet synchronous motors (PMSM) is increasing in the industry today. Due to this fact, the high efficiency ratio of PMSMs has reached IE5 premium class efficiency. Therefore, the efficiency coefficient of the PMSM varies from 92% to 97%. As a result, this type of motor is replacing traditional asynchronous motor by falling into efficiency classes of IE1, IE2, IE3, and IE4, which range from 75% to 92% in the industry. Thus, the object of the research was to develop a method to determine the efficiency of permanent magnet synchronous motor applications in order to identify and verify the variating parameters. In this study, an innovative and safe method of PMSM testing when the nominal parameters of the motor are unknown was presented through research. Also, the comparison of PMSM oscillograms with different types of load types and phase shift oscillograms, generated using operation amplifier, were analyzed and is scrutinized. During the design process, the PMSM was projected for the IE5 premium efficiency class. However, after production, the PMSM sometimes does not match the nameplate parameters, which are declared by the factory. As a result, during the testing procedures, the PMSM nameplate parameters did not match the projected parameters. Facing the problem of the projected and tested efficiency mismatch, the PMSM highest efficiency determination experiments were performed in a laboratory in order to prove the highest efficiency of the PMSM. The results showed different PMSM input parameters. Furthermore, the experimental results of the PMSM testing were confirmed with electrical machines theory, and simulation results were performed with electrical circuits. The theory of PMSM operating in different values of input voltage is represented in graphical abstract.

Air Gap Flux Density for the Planar Motor

2012 ◽  
Vol 503 ◽  
pp. 201-206
Author(s):  
Xiao Hong Hao ◽  
Xue Kang Li ◽  
Wu Zhou ◽  
Bei Peng
Keyword(s):  
Flux Density ◽  
Permanent Magnets ◽  
Separation Of Variables ◽  
Scalar Potential ◽  
Three Dimensional ◽  
Dynamic Modelling ◽  
Air Gap ◽  
Magnetic Flux Density ◽  
Flux Density Distribution ◽  
Analytical Expressions

An analytical method was presented to predict the three-dimensional (3-D) magnetic flux density distribution in the air gap produced by NdFeB permanent magnets of the planar motor. First, the analytical model of the planar motor was established, and Laplace equations of magnetic scalar potential and a series of boundary conditions were given. Then, the analytical expressions of magnet field strength and magnet flux density were obtained in the air gap of produced by NdFeB permanent magnets by the method of separation of variables. Finally, Comparisons the analytical results and finite element results, and the error never exceed five percent. Therefore, high precision has been derived. The analytical field results provide a basis for comparative studies, design optimization, and machine dynamic modelling of the planar motor.

Various types of traction synchronous motors for urban use

2021 ◽  
pp. 3-7
Author(s):  
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
High Efficiency ◽  
Asynchronous Motor ◽  
Good Alternative ◽  
Operating Conditions ◽  
Permanent Magnet Synchronous Motors ◽  
Synchronous Motors ◽  
Inductor Motor ◽  
Urban Conditions

Asynchronous and valve-inductor (synchronous-reactive) motors have high efficiency at high rotor speeds, while permanent magnet synchronous motors (SPM and IPM) have high efficiency at low and medium frequencies. The latter are the most optimal for urban conditions, and the former for conditions of operation on highways and highways. Synchronous motors with permanent magnets are more expensive, so a good alternative to them can be synchronous-jet motors with permanent magnets, which determine the optimal balance of active and reactive torque, as well as efficiency. Keywords: synchronous motor, asynchronous motor, valve-inductor motor, synchronous-jet motor, permanent magnet, efficiency, operating conditions, reactive torque

scholarly journals LINE-START SYNCHRONOUS MOTOR A VIABLE ALTERNATIVE TO ASYNCHRONOUS MOTOR

2020 ◽  
Vol 19 (1) ◽  
pp. 039
Author(s):  
Vasilija Šarac
Keyword(s):  
Power Electronics ◽  
Power Factor ◽  
Permanent Magnets ◽  
Asynchronous Motor ◽  
Synchronous Motor ◽  
Viable Alternative ◽  
Maintenance Cost ◽  
Operating Characteristics ◽  
Transient Characteristics ◽  
Asynchronous Motors

Advancements in power electronics that contributed to the easier starting of synchronous permanent magnet motors have increased the significance of this type of motors, widely known as not–self-starting motors. However, power electronics, which is necessary, for the starting of the synchronous motor contributed also to the complexity of this type of motor drives as well as to increased operational and maintenance cost. The line-start synchronous motors have gained the popularity during recent years as a viable alternative to asynchronous motors due to an easy line starting similar to the asynchronous motors and good operational parameters such as high efficiency and power factor. The paper presents the design of a line-start synchronous motor, derived from an asynchronous motor, by redesigning the rotor with flux barriers and permanent magnets. The computer models for calculating parameters and operating characteristics of both motors were modeled and the accuracy of the obtained results was verified by comparison with experimental data. Motor transient characteristics of speed, current and torque for the line starting of the both motors, when they were fed with the voltage from the network, were determined as well. The obtained transient characteristics of both motors were compared and adequate conclusions regarding line starting of both motors were derived. The newly derived synchronous motor for line starting has good operational characteristics such as increased efficiency, power factor and starting torque compared with the respected parameters of the asynchronous motor, good transient and steady-state operating characteristics and good dynamic response at sudden load change.

Characteristic and Magnetic Field Analysis of a Novel Ironless Halbach Permanent Magnet Linear Synchronous Motor

2013 ◽  
Vol 416-417 ◽  
pp. 149-155
Author(s):  
Lu Zhang ◽  
Bao Quan Kou ◽  
Bin Chao Zhao ◽  
Feng Xing
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Synchronous Motor ◽  
Field Analysis ◽  
Magnetic Flux Density ◽  
Linear Synchronous Motor ◽  
Halbach Array ◽  
Magnetic Field Analysis ◽  
Magnetization Intensity ◽  
Flux Density Distribution

This paper proposes an ironless permanent magnet linear synchronous motor (ILPMLSM) with a novel Halbach array. The magnetic flux density distribution of the Halbach array is solved analytically by using the equivalent magnetization intensity method. The expressions of no-load back-EMF and electromagnetic thrust are obtained. All of the results are verified by finite element method and they are coincide very well.

Mathematical Analysis and Investigation Results of the Bearingless Electric Motor with Permanent Magnets

2013 ◽  
Vol 198 ◽  
pp. 354-359
Author(s):  
Maciej Henzel
Keyword(s):  
Finite Element Method ◽  
Electric Motor ◽  
Mathematical Analysis ◽  
Permanent Magnets ◽  
Magnetic Flux Density ◽  
Friction Forces ◽  
University Of Technology ◽  
Bearingless Motor ◽  
Overall Efficiency ◽  
Flux Density Distribution

The paper deals with analysis of bearingless electric motor with surface-mounted permanent magnets. This kind of electric motor eliminate disadvantages of conventional motors, e.g. overall efficiency, friction forces, heat abstraction. In paper are shown mathematical analysis of bearingless motor and experimental investigation results of them. There are shown results of analysis of magnetic flux density distribution in bearingless motor by finite element method, too. This kind of motor was elaborated and investigated in Military University of Technology.

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