Nonlinear normal modes and primary resonance for permanent magnet synchronous motors with a nonlinear restoring force and an unbalanced magnetic pull

2019 ◽  
Vol 97 (2) ◽  
pp. 1197-1213 ◽  
Author(s):  
Hui Liu ◽  
Yunhao Wu ◽  
Xiaojie Wang ◽  
Pengfei Yan ◽  
Xun Zhang
Keyword(s):  
Permanent Magnet ◽  
Normal Modes ◽  
Primary Resonance ◽  
Nonlinear Normal Modes ◽  
Permanent Magnet Synchronous Motors ◽  
Restoring Force ◽  
Synchronous Motors ◽  
Unbalanced Magnetic Pull ◽  
Nonlinear Restoring Force ◽  
Nonlinear Normal

scholarly journals Isolated Response Curves in a Base-Excited, Two-Degree-of-Freedom, Nonlinear System

2015 ◽  
Author(s):  
J. P. Noël ◽  
T. Detroux ◽  
L. Masset ◽  
G. Kerschen ◽  
L. N. Virgin
Keyword(s):  
Nonlinear System ◽  
Harmonic Balance ◽  
Global Analysis ◽  
Normal Modes ◽  
Nonlinear Normal Modes ◽  
Basins Of Attraction ◽  
Response Curves ◽  
Restoring Force ◽  
Nonlinear Normal ◽  
Two Degree Of Freedom

In the present paper, isolated response curves in a nonlinear system consisting of two masses sliding on a horizontal guide are examined. Transverse springs are attached to one mass to provide the nonlinear restoring force, and a harmonic motion of the complete system is imposed by prescribing the displacement of their supports. Numerical simulations are carried out to study the conditions of existence of isolated solutions, their bifurcations, their merging with the main response branch and their basins of attraction. This is achieved using tools including nonlinear normal modes, energy balance, harmonic balance-based continuation and bifurcation tracking, and global analysis.

Nonlinear normal modes and primary resonance of horizontally supported Jeffcott rotor

2011 ◽  
Vol 66 (3) ◽  
pp. 377-387 ◽  
Author(s):  
Hiroshi Yabuno ◽  
Takuma Kashimura ◽  
Tsuyoshi Inoue ◽  
Yukio Ishida
Keyword(s):  
Normal Modes ◽  
Primary Resonance ◽  
Nonlinear Normal Modes ◽  
Jeffcott Rotor ◽  
Nonlinear Normal

Influence of unbalanced magnetic force on shaft deflection in permanent magnet synchronous motor with fractional slot concentrated windings

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1461-1468
Author(s):  
Ting Dong ◽  
Juyan Huang ◽  
Bing Peng ◽  
Ling Jian
Keyword(s):  
Permanent Magnet ◽  
Magnetic Force ◽  
Permanent Magnet Synchronous Motor ◽  
Operational Reliability ◽  
Topology Structure ◽  
Permanent Magnet Synchronous Motors ◽  
Synchronous Motors ◽  
Shaft Deflection ◽  
Large Length ◽  
Fractional Slot

The calculation accuracy of unbalanced magnetic forces (UMF) is very important to the design of rotor length, because it will effect the shaft deflection. But in some permanent magnet synchronous motors (PMSMs) with fractional slot concentrated windings (FSCW), the UMF caused by asymmetrical stator topology structure is not considered in the existing deflection calculation, which is very fatal for the operational reliability, especially for the PMSMs with the large length-diameter ratio, such as submersible PMSMs. Therefore, the part of UMF in the asymmetrical stator topology structure PMSMs caused by the choice of pole-slot combinations is analysized in this paper, and a more accurate rotor deflection calculation method is also proposed.

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