A Novel High-Power Magnetic Transmission System Based on Magnetic Conductivity Modulation Principle

2017 ◽  
Author(s):  
Mo Tao ◽  
Jun Wu ◽  
Zhiwu Ke ◽  
Xianling Li ◽  
Yong Li
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
High Power ◽  
Nuclear Power ◽  
High Reliability ◽  
Transmission System ◽  
High Power Field ◽  
New Type ◽  
Working Principle ◽  
Magnetic Conductivity

Due to the increasingly complexity of the nuclear power device system, the demands for its performance and security become rather high. There is a large number of rotating machinery working in the nuclear power plant.The static and dynamic misalignment between the rotating mechanical rotors may exist for various reasons like installation error, loading deformation, thermal expansion deformation and etc.Both of the radial vibration and the axial vibration can be generated by the misalignment. The security of nuclear power is severely threatened by these vibrations. Compared with the mechanical gears, the merits of Field Modulated Magnetic Transmission System Based on Magnetic Conductivity Modulation Principle are remarkable.Since it has a high reliability, lower noise, smaller vibration and a capacity of protecting itself during overload. It also can reduce maintenances, moreover there is a physical isolation between input and output in the new system.Besides,the traditional magnetic transmission system has only a low torque transmitting density.But by the use of efficient permanent magnet, the new type magnetic field modulation gears’ high torque transmitting density is comparable to the mechanical ones, even better then them. The major work of this paper is extension. Researching of the Field Modulated Magnetic Transmission System (FMMTS) based on Magnetic Conductivity Modulation Principle. Considering about the particularity of the working principle and structure of the FMMTS.First the author studied and analyzed its working principle in details by using analytic method.Then deduced the mathematical relationship of the pole pairs of permanent magnet of inner rotor,the number of copper core in magnetic adjusting loop and the pole pairs of permanent magnet of outer rotor.After that, a mathematical model of torque and rotational speed over three factors: the inner rotor, the outer rotor and the magnetic adjusting loop, were modoled. On the basis of principle analysis, the author verified the medol and did some further analysis by finite element simulating.Then we obtained the torque transmission characteristics of the Field Modulated Magnetic Transmission System, including the characteristics of Static torque and steady torque. Based on the above researching, the author put forward the idea of the new type three-layer permanent magnet excitation High-power Field Modulated Magnetic Transmission System based on Halbach tech, that’s middle layer is also permanent magnet. By using the finite element method to analyze its magnetic flux distribution and torque characteristics.Compared with FMMTS under the same size, the new type system improved the power density dramatically.

FEM-Based Lifting Permanent Magnetic Chuck Design

2013 ◽  
Vol 655-657 ◽  
pp. 355-358 ◽  
Author(s):  
Ning Ding ◽  
Yu Mei Song ◽  
Lina Wang ◽  
Ding Tong Zhang ◽  
Li Gong Ding
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Circuit Design ◽  
Magnetic Circuit ◽  
Saving Energy ◽  
Driving System ◽  
Working Principle ◽  
Optimal Saving ◽  
Element Method

The optimal saving energy permanent magnet lifting chuck has been designed. Working principle of this technology is introduced. Magnetic circuit design is carried out by finite element method (FEM). At the same time, a perfect self-acting driving system has been invented for picking and releasing loads fast and conveniently without using any electricity at all. Industry prototype was manufactured, and it verified that the proposed lifting permanent magnetic chuck was feasible.

Development and Current Status of Multi-Level Converter

2012 ◽  
Vol 201-202 ◽  
pp. 95-98
Author(s):  
Yan Xie ◽  
Bo Chao Chen ◽  
Yao Jun Chen
Keyword(s):  
High Voltage ◽  
High Power ◽  
Current Status ◽  
Research Focus ◽  
High Power Field ◽  
Advantages And Disadvantages ◽  
Converter Topologies ◽  
Working Principle ◽  
Multi Level ◽  
Level Converter

The multi-level converter is one of the focuses in the current high-voltage high-power field of power conversion, and is found widely application in high power drive system. It generated so far for nearly three decades of history. During this period a large number of multi-level topology appeared, there are three most commonly used, which are diode clamped, capacitor and cascaded H-bridge. In this paper, the development of the multi-level converter is reviewed. The structure of three multi-level converter topologies are given, and then their advantages and disadvantages are given by analyzing and comparing their characteristics. Finally, a new modular multi-level converter (MMC) is introduced which is one of research focus of multi-level converter field at present. Its structure and working principle are described in detail. Multi-level converters will continue to be developed to meet the demand of high-voltage and high power applications.

In-Wheel Traction Motor: a Case Study for Formula SAE Electric

2020 ◽  
Author(s):  
Abraão Regis Guia ◽  
Rafael A. Silva ◽  
Igor A. Pires ◽  
Thales A. C. Maia
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
High Power ◽  
Design Method ◽  
Permanent Magnet Synchronous Machine ◽  
High Power Density ◽  
Formula Sae ◽  
Output Torque ◽  
Wheel Drive

This paper discusses in-wheel electric tractive systems, bringing as a case study the finite element design of a Fractional Slot Permanent Magnet Synchronous Machine with non-Overlaping Winding (FSPMSM) for an all-wheel drive Formula Student powertrain. The goal is to obtain a system that fits a 10” rim wheel, with a high power density that enables a 280 kg vehicle to accelerate over 75 meters in less than 4 seconds. Iterating the design method to maximize the output torque, the simulations indicate that a single 12,000 rpm machine can provide continuous 17.7 kW at the 600 Vdc system.

Finite Element Analysis and Experimental Study for MWD Hybrid Excitation Generator

2013 ◽  
Vol 313-314 ◽  
pp. 7-10
Author(s):  
Xiao Du ◽  
De Sheng Li ◽  
En Huai Lin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Magnetic Flux ◽  
Excitation Current ◽  
Element Analysis ◽  
Excitation Generator ◽  
Hybrid Excitation ◽  
Characteristics Analysis ◽  
New Type ◽  
Working Principle

To obtain the stable output voltage, a new type of MWD hybrid excitation generator is designed in which magnetic flux can be regulated from -2% to 22%. In the generator, hybrid excitation part and permanent magnet part work in parallel. This article introduces the working principle and structure of this generator. In addition, finite element analysis, magnetic field and regulation characteristics analysis for this generator is addressed to illustrate the variation of magnetic flux with pole length and excitation current changing. Experiments verify the design and finite element analyses.

scholarly journals Winding Arrangement of A New Type Hollow Rotor BLDC Motor

2018 ◽  
Vol 9 (3) ◽  
pp. 933
Author(s):  
Farina Sulaiman ◽  
R.N. Firdaus ◽  
M. S. Ahmad ◽  
A. Jidin ◽  
T. Sutikno
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Direct Current ◽  
Maximum Speed ◽  
Bldc Motor ◽  
Structural Comparison ◽  
New Type ◽  
Electromagnetic Performance ◽  
Fractional Slot

This paper discusses about winding arrangement of fractional slot of a new type hollow rotor Brushless Direct Current (BLDC) motor. Hollow rotor has higher performance compared to other BLDC motor because it minimizes the unused flux below permanent magnet and maximize torque produce by the motor. It’s also known that 8 pole motor is favorite used in industrial because it has an optimum space of permanent magnet for a smaller motor size. The number of pole will affect the maximum speed of the rotor. Thus, the objective of this research is to investigate the best winding arrangement for 8 pole of hollow rotor that could produce the highest electromagnetic performance. At starts, four combinations of slot number and coil sizes had been selected. Structural comparison in term of coil vector and winding arrangement is studied. Finite Element Method (FEM) had been used to simulate the parameters such as backemf and torque waveforms. It was convinced that 9 slot 8 pole with 0.6 size of coil produces the best performance. The confirmed model had been fabricated and measured. Both results from FEM and measurement are compared in term of backemf and torque where percentage differences are 7.4 % and 8 %, respectively. As conclusion, this research shows the fundamental of winding arrangement of fractional slot of motor especially 8 pole motor.

Design and Kinematic Analysis of a New Grapple Mechanism

2012 ◽  
Vol 605-607 ◽  
pp. 239-243
Author(s):  
Fei Deng ◽  
Jin Bao Chen ◽  
Meng Chen ◽  
Fu Jun Peng
Keyword(s):  
Kinematic Analysis ◽  
High Reliability ◽  
Space Station ◽  
Simple Construction ◽  
Working Process ◽  
End Effector ◽  
Parameter Variations ◽  
New Type ◽  
Working Principle

Combined with China's demand for space station construction, a new type of lock system for end effector is developed. This grapple mechanism makes grappling, pulling and rigidization in one mechanism which is simple construction and high reliability. The composition and the working principle of this grapple mechanism are introduced. Then, the singularity of the mechanism is analyzed and its kinematics equations are established. The parameter variations are obtained by using PROE. The results show that the working process adapts to the variation of the motion and force between the end effector and target adapter perfectly.

scholarly journals Design Optimization of Electrodynamic Structure of Permanent Magnet Piston Mechanical Electric Engine

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6313
Author(s):  
Yun Sun ◽  
Hongxin Zhang ◽  
Zhen Liang ◽  
Jian Yang
Keyword(s):  
Permanent Magnet ◽  
Internal Combustion Engines ◽  
Combustion Engines ◽  
Theoretical Evaluation ◽  
New Type ◽  
Working Principle ◽  
Overall Performance ◽  
Electric Engine ◽  
The Magnetic Field ◽  
Electrodynamic Structure

To meet the demand of multiple power requirements, and enhance power utilization, a new type of dual-element electricity unit is designed in this study, which is a permanent magnet piston mechanical electric engine. Based on the analysis method of traditional internal combustion engines and linear generators, the working principle of the engine and the magnetic field distribution in the electrodynamic structure are analyzed, the machine dynamics model and electrodynamics model of the engine are established, then the theoretical evaluation is additionally established using finite elements. Based on this, an optimization model is constructed with the electrodynamic shape dimension as the optimization variable, with the intention of growing the output power. The optimization of the engine electrodynamic shape is executed via the use of the finite aspect approach and the NLPQL optimization algorithm integrated. The results show that the optimized engine output electricity expanded to 8.40 w, which is 18.81% greater than before optimization. An experimental prototype is developed, and the output voltage of the prototype is measured to verify the precept and overall performance of the new structure.

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