scholarly journals Influence of Rectifiers on Permanent Magnet Wind Generator Electromagnetic and Temperature Fields

2016 ◽  
Vol 10 (1) ◽  
pp. 205-219
Author(s):  
Qiu Hongbo ◽  
Dong Yu ◽  
Yang Cunxiang
Keyword(s):  
Electromagnetic Field ◽  
Temperature Field ◽  
Permanent Magnet ◽  
Core Loss ◽  
Harmonic Distortion ◽  
Temperature Fields ◽  
Stator Core ◽  
Current Harmonics ◽  
Copper Loss ◽  
Wind Generator

Power rectifiers are very necessary in the wind power generation systems since they are the necessary channels that link the generator and power gird together. However, they have some effects on the permanent magnet wind generator due to their work on fast on-off transitions. Taking an 8kW 2000r/min wind-driven permanent magnet generator as an example, the system model and external circuit were established. Firstly, based on the field-circuit coupling calculation method, the voltage and current harmonics have been studied respectively when the generator was connected to rectifier loads and pure resistance loads, so did the total harmonic distortion. The mechanism of harmonic impacted by rectifiers was revealed. Secondly, combined the harmonic electromagnetic field theory, the stator core loss, armature winding copper loss and rotor eddy loss were analyzed when the generator connected different loads. Furthermore, according to the definition of nonlinear circuits PF, the numerical analysis method was adopted to calculate the power factor when the generator connected two loads respectively. The change mechanism of PF impacted by rectifiers has been revealed. In addition, the temperature field model has been established and the generator temperature was also analyzed. The temperature distributions were obtained when the wind generator was connected to different loads. Then, the relationship between losses and temperature was combined, the change rules of permanent magnet temperature by the eddy current loss were studied under different load. At last, it can prove that the rectifiers have influences on both electromagnetic field and temperature field through comparing the simulation results with experimental test data.

scholarly journals Modeling and Analysis of Electromagnetic Field and Temperature Field of Permanent-Magnet Synchronous Motor for Automobiles

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2173
Author(s):  
Meixia Jia ◽  
Jianjun Hu ◽  
Feng Xiao ◽  
Ying Yang ◽  
Chenghao Deng
Keyword(s):  
Electromagnetic Field ◽  
Temperature Field ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Coupling Model ◽  
Synchronous Motor ◽  
Temperature Fields ◽  
Modeling And Analysis ◽  
Electromagnetic Model ◽  
Bidirectional Coupling

In order to study the interaction of electromagnetic fields and temperature fields in a motor, the iron loss curve at different frequencies of silicon steel and the B-H curve at different temperatures of the permanent magnet (PM) were obtained to establish the electromagnetic model of the permanent magnet synchronous motor (PMSM). Then, unidirectional and bidirectional coupling models were established and analyzed based on the multi-physical field. By establishing a bidirectional coupling model, the temperature field distribution and electromagnetic characteristics of the motor were analyzed. The interaction between temperature and electromagnetic field was studied. Finally, the temperature of the PMSM was tested. The results showed that the bidirectional coupling results were closer to the test result because of the consideration of the interaction between electromagnetic and thermal fields.

Temperature Field Analysis and Cooling Structure Design of Ironless Permanent Magnet Synchronous Linear Motor

2021 ◽  
Vol 14 ◽  
Author(s):  
Xiaoting Lu ◽  
Yang Li ◽  
Zailiang Chen
Keyword(s):  
Temperature Field ◽  
Permanent Magnet ◽  
Heat Loss ◽  
Linear Motor ◽  
Structure Design ◽  
Servo Control ◽  
Field Analysis ◽  
Temperature Fields ◽  
Water Cooling ◽  
Linear Motors

Objective: Ironless, permanent magnet, synchronous linear (IPMSL) motors are applied widely in precision servo control for the nonexistence of cogging forces and comparatively small fluctuations in thrust and speed. Method: The air and water cooling structures are designed by assuming the heat loss in the motor operations is the source for the distribution of the temperature field in the analysis under natural cooling. Conclusion: The temperature fields of the linear motor under the two cooling modes are compared and analyzed, which helps monitor the temperature of linear motors during development and operations.

Loss Calculation and Software Design Based on the Combination of Electric Circuit and Electromagnetic Field Solution in High Speed Permanent Magnet Machine

2015 ◽  
Vol 741 ◽  
pp. 521-525
Author(s):  
Xiao Guang Kong ◽  
Li Ping Fan ◽  
Yan Qiu Fu
Keyword(s):  
Electromagnetic Field ◽  
Software Design ◽  
High Frequency ◽  
High Speed ◽  
Core Loss ◽  
Electric Circuit ◽  
Mathematics Model ◽  
Element Analysis ◽  
Copper Loss ◽  
Field Solution

Mathematics model of loss for high speed machine is discussed. Calculation method of core loss and high-frequency additional copper loss of winding based on finite element analysis is introduced. Experiment results of losses are presented. In order to realize calculation and analysis, a method of PM machine by calling ANSYS and MATLAB based on VB of the combination of electric circuit and electromagnetic field solution is presented in this paper. The design and feature analysis of high speed PM machine takes an example to validate the accuracy and advantage.

scholarly journals Magnetic Field Characteristics and Stator Core Losses of High-Speed Permanent Magnet Synchronous Motors

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 535 ◽  
Author(s):  
Dajun Tao ◽  
Kai Liang Zhou ◽  
Fei Lv ◽  
Qingpeng Dou ◽  
Jianxiao Wu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnet Synchronous Motor ◽  
Core Loss ◽  
Load Condition ◽  
Synchronous Motor ◽  
Iron Core ◽  
Core Losses

This study focuses on the core losses in the stator region of high-speed permanent magnet synchronous motors, magnetic field characteristics in the load region, and variations in iron losses caused by changes in these areas. A two-pole 120 kW high-speed permanent magnet synchronous motor is used as the object of study, and a two-dimensional transient electromagnetic field-variable load circuit combined calculation model is established. Based on electromagnetic field theory, the electromagnetic field of the high-speed permanent magnet synchronous motor under multi-load conditions is calculated using the time-stepping finite element method. The magnetic field distribution of the high-speed permanent magnet synchronous motor under a multi-load condition is obtained, and the variations in iron core losses in different parts of the motor under multi-load conditions are further analyzed. The calculation results show that most of the stator iron core losses are dissipated in the stator yoke. The stator yoke iron loss under the no-load condition exceeds 70% of the total stator iron core loss. The stator yoke iron loss under rated operation conditions exceeds 50% of the total stator iron core loss. The stator loss under rated load operation conditions is higher than that under no-load operation. These observations are sufficient to demonstrate that the running status of high-speed motors is closely related to the stator iron losses, which have significance in determining the reasonable yoke structure of high-speed and high-power motors and the cooling methods of motor stators.

scholarly journals Electromagnetic and Thermal Analysis of a Permanent Magnet Motor Considering the Effect of Articulated Robot Link

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3239
Author(s):  
Phuong Thi Luu ◽  
Ji-Young Lee ◽  
Ji-Heon Lee ◽  
Jung-Woo Park
Keyword(s):  
Thermal Analysis ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Core Loss ◽  
Thermal Characteristics ◽  
Heat Sources ◽  
Permanent Magnet Motor ◽  
Copper Loss ◽  
Lumped Parameter ◽  
Articulated Robot

This paper presents the electromagnetic and thermal characteristics of a permanent magnet synchronous motor (PMSM) in a joint actuator which is used for articulated robot application. In an attempt to design a compact PMSM for the articulated robot, robot link should be taken into consideration during the motor design process as it can reduce the temperature distribution on motor, thus reducing the volume of the motor. A lumped-parameter thermal model of PMSM with and without a link is proposed considering the core loss, copper loss, and mechanical loss as heat sources. The electromagnetic and thermal analysis results are well confirmed by the experiment in a 400 W 20-pole/24-slot PMSM. The experiment results show that the robot link helps to reduce the motor end-winding temperature by about 40%, and this leads to an increase in power density of the motor.

Core Loss Reduction of an Interior Permanent-Magnet Synchronous Motor Using Amorphous Stator Core

2016 ◽  
Vol 52 (3) ◽  
pp. 2261-2268 ◽  
Author(s):  
Shotaro Okamoto ◽  
Nicolas Denis ◽  
Yoshiyuki Kato ◽  
Masaharu Ieki ◽  
Keisuke Fujisaki
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Core Loss ◽  
Synchronous Motor ◽  
Loss Reduction ◽  
Stator Core ◽  
Interior Permanent Magnet

Experimental Verification and Performance Analysis of Permanent Magnet Wind Turbine Generators Considering Magnetic Losses

2015 ◽  
Vol 799-800 ◽  
pp. 1349-1355
Author(s):  
Kyoung Hun Jung ◽  
Jang Young Choi
Keyword(s):  
Performance Analysis ◽  
Permanent Magnet ◽  
Experimental Verification ◽  
Block Diagram ◽  
Core Loss ◽  
Synchronous Generator ◽  
Magnetic Losses ◽  
Copper Loss ◽  
Turbine Generators ◽  
And Performance

This paper deals with experimental verification and performance analysis of permanent magnet synchronous generator (PMSG) for wind power generation considering magnetic losses using d-q axis model. The d-q voltage equation of the PMSG is derived. The equations for losses such as copper loss, core loss and mechanical loss are also derived. Finally, by implementing dynamic simulation block diagram for the prediction of generating performance considering losses using MATLAB/SIMULINK, the generating performances of the PMSG are predicted under various speeds and loads. The predicted results are validated extensively by finite element (FE) analyses and measurements.

scholarly journals Analysis of Core Loss of Permanent Magnet Synchronous Machine for Vehicle Applications under Different Operating Conditions

2020 ◽  
Vol 10 (20) ◽  
pp. 7232
Author(s):  
Guohui Yang ◽  
Shuo Zhang ◽  
Chengning Zhang
Keyword(s):  
Permanent Magnet ◽  
Pulse Width Modulation ◽  
High Efficiency ◽  
Core Loss ◽  
Operating Conditions ◽  
Permanent Magnet Synchronous Machines ◽  
Stator Core ◽  
Core Losses ◽  
Novel Method ◽  
Maximum Torque Per Ampere

Permanent magnet synchronous machines (PMSMs) are widely used in electric vehicles due to their high power density, high efficiency, etc. Core losses account for a significant component of the total loss in PMSMs. Therefore, it is necessary to carefully consider it when designing PMSMs according to actual scientific research project applications. This paper extracts the characteristic operating points of the PMSMs under different operating conditions at different speeds. Then a harmonic analysis of air-gap flux density, phase current, core loss was completed, and detailed comparative analysis was performed. A novel method for comprehensively analyzing the stator core loss of PMSMs for vehicles is proposed, which reveals the law of the core loss of the PMSM under Maximum-Torque-Per-Ampere (MTPA) and Space Vector Pulse Width Modulation (SVPWM). The method was verified by a prototype experiment where the actual core loss of PMSMs was measured to verify the correctness of the method. This research provides a reference for accurately predicting core loss during the forward design of PMSMs and completing core loss evaluation for existing PMSMs.

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