Torque Analysis and Shape Optimization of Electromagnetic Clutch

2010 ◽  
Vol 426-427 ◽  
pp. 122-126
Author(s):  
Chang Hao Piao ◽  
Z.Y. Huang ◽  
J. Wang ◽  
Chong Du Cho
Keyword(s):  
Static Friction ◽  
Friction Torque ◽  
Geometrical Shape ◽  
Fem Model ◽  
Torque Analysis ◽  
Numerical Process ◽  
Analytical Result ◽  
Electromagnetic Clutch ◽  
Static Torque ◽  
Mathematical Process

This paper is devoted to the static friction torque of electromagnetic clutch. The torque maximization is also investigated by optimizing the geometrical shape of armature. For the purpose of designing and optimizing electromagnetic clutch, torque prediction is a very important factor. We construct an axi-symmetric FEM model to analyze static friction torque and use a torque tester to evaluate real torque. In this work, analytically predicted torque is compared with the experimental one to discuss the rationality of numerical process. The analytical result agrees well with experimental data, which proves the validity of the mathematical process. Through optimization of the shape of armature, we also improve the static torque of electromagnetic clutch about 30%.

Study on Torque Analysis of Micro-Electromagnetic Clutch by Using the Finite Element Method

2006 ◽  
Vol 306-308 ◽  
pp. 613-618 ◽  
Author(s):  
Chang Hao Park ◽  
Chong Du Cho ◽  
Chang Boo Kim ◽  
Hyeon Gyu Beom
Keyword(s):  
Material Properties ◽  
Mathematical Approach ◽  
The Finite Element Method ◽  
Fem Model ◽  
Analysis Process ◽  
Real Material ◽  
Torque Analysis ◽  
Analytical Result ◽  
Electromagnetic Clutch ◽  
Mathematical Process

This study tries to analyze the torque generated in a micro-electromagnetic clutch by using FEM. For the purpose of design change and optimization of the micro-electromagnetic clutch, the torque prediction is very important. We employ a mathematical approach of the process based on electromagnetic principle. Then real material properties are substituted in the FEM model to obtain the analytical torque. For a test, the predicted torque is compared with the experimental one to discuss the rationality of torque analysis process. The analytical result agrees well with experimental data and hence explaining the validity of the mathematical process and the FEM model.

scholarly journals Friction torque analysis of high-speed spindle bearing based on the quasi-static improved model

2020 ◽  
Vol 1601 ◽  
pp. 062022
Author(s):  
Songsheng Li ◽  
Yangyang Liu ◽  
Zhiqiang Zheng ◽  
Tongxu Yang ◽  
Huihang Chen ◽  
...  
Keyword(s):  
High Speed ◽  
Friction Torque ◽  
Spindle Bearing ◽  
Torque Analysis ◽  
Improved Model

LMI Based Control of Stick-Slip Oscillations in Drilling

2014 ◽  
Author(s):  
Matthew W. Harris ◽  
Behçet Açıkmeşe ◽  
Eric van Oort
Keyword(s):  
Linear Matrix Inequality ◽  
Convex Sets ◽  
Static Friction ◽  
Friction Torque ◽  
Angular Motion ◽  
Linear Matrix ◽  
Model Parameters ◽  
Matrix Inequality ◽  
Stick Slip ◽  
Linear Matrix Inequality Approach

This paper investigates control of stick-slip oscillations in drilling from a linear matrix inequality perspective. Stick-slip oscillations include a period of no angular motion at the bit caused by a large static friction torque followed by a period of rapid angular motion at the bit caused by a build up of torque in the drilling pipe. Many of the model parameters are uncertain but belong to convex sets, and the friction torques are not easily modeled. The linear matrix inequality approach facilitates design of state feedback controllers in the presence of polytopic uncertainties and can be optimized to reject disturbance effects relative to outputs. Results indicate that the linear matrix inequality approach leads to a simple controller, successfully alleviates the stick-slip problem, and is robust to uncertainties.

scholarly journals The Nonsmooth Vibration of a Relative Rotation System with Backlash and Dry Friction

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Minjia He ◽  
Shuo Li ◽  
Jinjin Wang ◽  
Zhenjun Lin ◽  
Shuang Liu
Keyword(s):  
Dry Friction ◽  
Time History ◽  
Static Friction ◽  
Friction Torque ◽  
Relative Rotation ◽  
Rotation System ◽  
Inclusion Theory ◽  
Nonsmooth Dynamical Systems ◽  
Driving Torque ◽  
Function Time

We investigate a relative rotation system with backlash and dry friction. Firstly, the corresponding nonsmooth characters are discussed by the differential inclusion theory, and the analytic conditions for stick and nonstick motions are developed to understand the motion switching mechanism. Based on such analytic conditions of motion switching, the influence of the maximal static friction torque and the driving torque on the stick motion is studied. Moreover, the sliding time bifurcation diagrams, duty cycle figures, time history diagrams, and the K-function time history diagram are also presented, which confirm the analytic results. The methodology presented in this paper can be applied to predictions of motions in nonsmooth dynamical systems.

scholarly journals The static friction torque compensation of SPG by single resonance pulse

2011 ◽  
Vol 16 ◽  
pp. 119-124
Author(s):  
YANG Jian-Guo ◽  
ZHOU Ren-kui ◽  
LIU Zhao-hui ◽  
LIANG Dong-sheng
Keyword(s):  
Static Friction ◽  
Friction Torque

scholarly journals Research on friction torque analysis of planetary roller screw mechanism considering load distribution

2018 ◽  
Author(s):  
Fajin Gan ◽  
Pengcheng Mao ◽  
Shicheng Zheng ◽  
Guangliang Li ◽  
Shupeng Xin
Keyword(s):  
Load Distribution ◽  
Friction Torque ◽  
Roller Screw ◽  
Torque Analysis ◽  
Screw Mechanism

scholarly journals Friction Torque Analysis of Planetary Roller Screw Mechanism in Roller Jamming

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Linjie Li ◽  
Yongling Fu ◽  
Shicheng Zheng ◽  
Jian Fu ◽  
Tianxiang Xia
Keyword(s):  
Transmission Efficiency ◽  
Friction Torque ◽  
Contact Theory ◽  
Distribution Model ◽  
Structural Failure ◽  
Roller Screw ◽  
Torque Analysis ◽  
Screw Mechanism ◽  
Actuation Systems ◽  
Electromechanical Actuation

The load distribution model of the planetary roller screw mechanism (PRSM) is established on the basis of Hertz contact theory. The objective is to obtain a friction torque model of the PRSM in roller jamming. An example is provided to calculate the friction torque of the PRSM in roller jamming. Thereafter, the transmission efficiency is calculated. A static structural analysis is performed using the finite element method to estimate the contact stress between the threads of the PRSM components. Computational results indirectly reveal that roller jamming exerts considerable influence on the friction torque of the PRSM. Results show that the friction torque of the planetary roller screw increases when the roller is jammed and the wear of the parts is accelerated. This condition leads to structural failure. The results of this study can serve as a foundation for electromechanical actuation systems, which can be useful in designing antijamming systems for safety-critical aircraft applications.

scholarly journals On the Conceptual Design of a Novel Class of Robot Configurations

1989 ◽  
Vol 111 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Lung-Wen Tsai ◽  
Ferdinand Freudenstein
Keyword(s):  
Response Time ◽  
Rigid Body ◽  
Conceptual Design ◽  
High Performance ◽  
Kinematic Structure ◽  
Displacement Analysis ◽  
Torque Analysis ◽  
Robot Configurations ◽  
Static Torque

The conceptual design has been investigated for the kinematic structure of relatively small robots with positive, rigid-body drive elements of minimum complexity in order to maximize rigidity, minimize vibrations and response time and optimize payload. Several novel robot configurations have been conceived and their displacement analysis and static torque analysis derived directly from their kinematic structure. It is believed that these configurations can be advantageous in the design of high-performance robots relative to current designs involving cables and push/pull elements.

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