Analysis of the Radial Component of Electromagnetic Force Density and Vibration Behavior of an IPMSM With Multiple Three-Phase Winding Units

2021 ◽  
Author(s):  
Sayyed Haleem Shah ◽  
Xiaoyuan Wang ◽  
Usman Abubakar ◽  
Peng Gao
Keyword(s):  
Electromagnetic Force ◽  
Radial Component ◽  
Force Density ◽  
Vibration Behavior ◽  
Three Phase

Analysis of Vibration Caused by Electromagnetic Force on Stator End-Winding of Large Dry Submersible Motor

2013 ◽  
Vol 416-417 ◽  
pp. 428-432
Author(s):  
Li Shan ◽  
Xiao Wei Cheng ◽  
Yong Fang ◽  
Xiao Hua Bao
Keyword(s):  
Electromagnetic Field ◽  
Steady State ◽  
Transition State ◽  
Electromagnetic Force ◽  
Radial Displacement ◽  
Radial Direction ◽  
Axial Direction ◽  
Axial Displacement ◽  
Force Density ◽  
Submersible Motor

This paper investigates the vibration which caused by electromagnetic on the stator end-winding of the large dry submersible motor. Firstly, the electromagnetic field which included transition state and steady state is researched by 3-D FEM. Secondly, the electromagnetic force which lead to vibrations of end-winding is calculated by numerical method, it can be obtained that where endured the largest force density along the slant part of end-winding. Finally, the radial displacement and the axial displacement of the slant part which caused by vibrations is studied, the analysis results show that the axial displacement is larger than the amplitude of radial displacement. It indicates that the slant part of end-winding will be more easily damaged at axial direction than radial direction.

scholarly journals A Comprehensive Analysis on Transient Electromagnetic Force Behavior of Stator Windings in Turbo-Generator

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Hong-Chun Jiang ◽  
Yu-Ling He ◽  
Gui-Ji Tang ◽  
Ming-Xing Xu
Keyword(s):  
Electromagnetic Force ◽  
Mechanical Response ◽  
Comprehensive Analysis ◽  
Simplified Model ◽  
Force Density ◽  
Stator Core ◽  
Stator Windings ◽  
Fea Model ◽  
Transient Electromagnetic ◽  
Turbo Generator

This paper presents a comprehensive analysis on the transient electromagnetic force behavior of the stator windings in a QFSN-600-2YHG type turbo-generator. Different from other studies, this paper investigates not only the distribution regularities of the resultant force and the force density, but also the force harmonic characteristics, and the mechanical responses which will cause sensitive impact on the insulation wearing. The whole work is generally based on a proposed simplified model and the 3D finite element coupling calculation. The simplified model contains two parts. The first part is the theoretical model that employs the approximate solution of the image current to obtain the analytic formula of the electromagnetic force on the end windings conveniently. The second part is the FEA model that employs only the end windings and one-tenth of the stator core to save the calculating memory and, meanwhile, obtain the qualified electromagnetic force as well as the mechanical response. It is shown that the nose-top, the connection point between the line part and the end part, and the middle of the involute are the three most dangerous positions of the end winding to sustain serious insulation wearing. Moreover, the winding, which endures the maximum mechanical response, is neither always consistent with the one that has the largest resultant electromagnetic force nor directly in accordance with the winding that affords the most intensive electromagnetic force density. The findings in this paper will be beneficial for the insulation monitoring and the manufacturing improvement on the stator windings.

Electromagnetic Force Density in a Ferromagnetic Material

2004 ◽  
Vol 40 (2) ◽  
pp. 553-556 ◽  
Author(s):  
F. Henrotte ◽  
H.V. Sande ◽  
G. Deliege ◽  
K. Hameyer
Keyword(s):  
Electromagnetic Force ◽  
Ferromagnetic Material ◽  
Force Density

AXIAL ELECTROMAGNETIC FORCE DENSITY IN MPD THRUSTERS

1992 ◽  
Vol 06 (23) ◽  
pp. 1465-1474
Author(s):  
T.S. SHESHADRI
Keyword(s):  
Density Distribution ◽  
Axial Force ◽  
Electromagnetic Force ◽  
Mass Density ◽  
Force Density ◽  
Viscous Effects ◽  
Inlet Velocity ◽  
Large Force ◽  
Hall Parameter ◽  
Mpd Thrusters

An MPD thruster formulation involving coupled aerothermodynamic-electromagnetic equations and including viscous effects is developed and solved. The electromagnetic force density distribution in the thruster interior is studied. Axial force densities are found to be largest on the cathode longitudinal surface. Very large force densities are found at the cathode upstream end and this is attributed to large values of the Hall parameter. Over the rest of the cathode longitudinal surface, axial force densities increase with increasing inlet velocities and mass densities and larger plasma viscosities. Equivalent increases in inlet velocity and mass density produce effects of different magnitudes.

Study on Nonlinear Vibration of Motor Rotor System

2012 ◽  
Vol 226-228 ◽  
pp. 221-226
Author(s):  
Feng Dong Zhang ◽  
Qi Fen Jia ◽  
Su Xia Zhang
Keyword(s):  
Electromagnetic Force ◽  
Natural Frequencies ◽  
Asynchronous Motor ◽  
Rotor System ◽  
Actual Structure ◽  
Electromagnetic Vibration ◽  
Three Phase ◽  
Vibration Problems ◽  
Rotary Speed ◽  
Double Resonances

Based on the actual structure of the motor,the model of rotor system has been established. Horizontal electromagnetic vibration problems of the rotor system are researched under the situation of asynchronous motor running in symmetrical steady state.Calculate the electromagnetic energy and electromagnetic force of the three-phase asynchronous motor (p=4). Study the electromagnetic characteristics and nonlinear electromagnetic vibration problems of the motor rotor system. Taking the gyroscopic effect into account, when analysing the rotor. Calculate the natural frequencies of the system and study double resonances problem caused by the electromagnetic force. Rotary speed, support rigidity all have certain influences upon natural frequencies of the system. Consider these factors for obtaining some regular curves. The first approximate solution and steady response curve of the system were obtained by analysing the double resonances caused by corresponding electromagnetic force.

scholarly journals Analysis Of 12- Level Cycloconverter To Minimize Thd (Total Harmonic Distortion) Level In 3-Phase Induction Motor

2021 ◽  
Vol 12 (2) ◽  
pp. 1411-1417
Author(s):  
Mallepally Narendar Reddy, Et. al.
Keyword(s):  
High Frequency ◽  
Harmonic Distortion ◽  
Industrial Applications ◽  
Motor Drives ◽  
Force Density ◽  
Nonlinear Loads ◽  
Distortion Level ◽  
Three Phase ◽  
Sinusoidal Waveform ◽  
Multiphase Motor

These harmonics are higher than essential frequencies and cause Total Harmonics Distortion (THD) which increases the rms current and generates more warmth in the load. Numerous techniques are used to suppress the harmonics to limit the warmth in the load. Another procedure is utilized in this work to limit THD and the method to beat the low exhibition of a traditional PWM (pulse width tweak) control. In this work, the desired output voltage is accomplished by contrasting the desired sinusoidal waveform (adjusting signal) with a high frequency three-sided waveform (transporter signal). Industrial applications demands high force and long life expectancy motor drives. Three phase motor drives have restricted force density consequently Multiphase motor drives are better solutions for high force density and substantial loads. In this work a 12 level cycloconverter is designed to drive three Phase load. The loads used in the industries almost nonlinear loads like motors. Thusly, because of these nonlinear loads extra harmonics incited at the output of the 12 level cycloconverter drive with major frequency. The harmonics and THD got using our proposed technique is thought about using Mat lab/Simulink

scholarly journals Analysis of Electromagnetic Force on Rotor End Windings of a 300 MW Variable-Speed Generator Motor for Pumped Storage

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Zhaowei Qiao ◽  
Yutian Sun
Keyword(s):  
Electromagnetic Force ◽  
Large Scale ◽  
Short Circuit ◽  
Element Model ◽  
Variable Speed ◽  
Distribution Map ◽  
3D Finite Element ◽  
Three Phase ◽  
Set Up ◽  
Pumped Storage

The variable-speed generator motor (VSGM) for pumped storage has a cylindrical rotor with three-phase lap or wave windings distributed in slots evenly and fed by a converter. For a large-scale VSGM, the electromagnetic force (EMF) on rotor end windings is an important contributor to distortion, vibration, and even damage of rotor end windings. A 3D finite element model of rotor end region of a 300 MW VSGM is set up. The distribution map of EMF density on involute and nose parts of rotor end windings, under rated load and three-phase short circuit at supersynchronous and subsynchronous speed, is drawn. Furthermore, the amplitude of EMF is calculated, and the radial, tangential, and axial components of EMF are analyzed. The results in this paper will lay a foundation for design of rotor end windings and their support structure.

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