Dual Magnetic Gear for Improved Power Density in High-Gear-Ratio Applications

2018 ◽  
Author(s):  
Eui-Jong Park ◽  
Chan-Seung Kim ◽  
Sang-Yong Jung ◽  
Yong-Jae Kim
Keyword(s):  
Power Density ◽  
Gear Ratio ◽  
Magnetic Gear

scholarly journals Study on force characteristics in accordance with gear ratio of the linear magnetic gear

2018 ◽  
Vol 7 (3.3) ◽  
pp. 179
Author(s):  
Sung Won Seo ◽  
Kyung Hun Shin ◽  
Keyyong Hong ◽  
Kyong Hwan Kim ◽  
Jang Young Choi
Keyword(s):  
Harmonic Distortion ◽  
Research Direction ◽  
Gear Ratio ◽  
Total Harmonic Distortion ◽  
Load Force ◽  
Combined Model ◽  
Characteristics Analysis ◽  
Magnetic Gear ◽  
Force Ripple ◽  
Secondary Side

We have studied linear magnetic gears. Since linear magnetic gears are excellent in terms of ease of manufacture and economy, we studied linear magnetic gears in this paper. The speed and the force of the secondary side of the magnetic gear are determined according to the gear ratio. In additional, the linear magnetic gear also performs a linear reciprocating motion different from the rotary magnetic gear. Therefore, in this paper, the model selection was made through reference works. The selected models had analyzed in accordance with gear ratio.Especially, the characteristics analysis method was compared with total harmonic distortion and force ripple. Also, it is possible to predict and compare the total harmonic distortion, the force ripple, and the speed according to the gear ratio. Finally, the speed comparison between the primary side and the secondary side of the gear ratio was carried out and the validity of the research direction of the linear gear was verified through all the results. All results are important for predicting gear ratio selection of precision linear magnetic gears. Therefore, in this paper, the load force is set opposite to the secondary side, and through this process to obtain accurate results from the analysis of the linear magnetic gear. From the analysis results of this paper, we can analyze the combined model of linear magnetic gear and linear generator. 

Research on Torque Production of a New Magnetic Gear

2011 ◽  
Vol 121-126 ◽  
pp. 4244-4248
Author(s):  
Yong Kui Man ◽  
Chang Cheng Xu ◽  
Shuang Quan Wang
Keyword(s):  
Power Transmission ◽  
Material Selection ◽  
Gear Ratio ◽  
Torque Measurement ◽  
Operating Life ◽  
Measurement And Analysis ◽  
Torque Analysis ◽  
Magnetic Gear ◽  
And Control ◽  
Consumption Efficiency

Gear is essential in modern powertrain. While the overwhelming majority of existing gear's power transmission is relying on direct contact of the engagement mechanically, this paper is the study of a novel non-contact magnetic gear. The new structure is especially useful for the requirement of big gear ratio because of its high load ability. Such gear, with high research value, has many advantages over mechanical gears and may replace mechanical gears in many applications. Torque is so basic at factors such as mechanical work, energy consumption, efficiency, operating life and safety. For the basic mechanical components to transmit motion and power----- gears, the torque measurement and analysis seems of great significance in determination and control of load, working parts' intensity design and material selection. Torque analysis is a method which researchers could benefit from much, in order to clarify the practicality of this new gear, it is necessary to utilize theory of torque and the conclusions drawn from simulation to research the structure of this new gear situation. The study can clarify prospect of the gear and provide a theoretical basis for further design.

A Kind of Spatial Angular Magnetic Gear Transmission

2012 ◽  
Vol 490-495 ◽  
pp. 1873-1877
Author(s):  
Yong Kui Man ◽  
Jun Feng Zhang ◽  
Yi Sheng Zhang ◽  
Shuo Zhang ◽  
Wen Sheng Hao ◽  
...  
Keyword(s):  
Power Transmission ◽  
Gear Ratio ◽  
Gear Transmission ◽  
Mechanical Contact ◽  
Transmission Systems ◽  
Vital Importance ◽  
Load Axis ◽  
Power Transmission Systems ◽  
Magnetic Gear ◽  
Low Efficiency

Gear exciting is of vital importance in modern power transmission systems. But when the requirements of angular gear transmission are needed, the shortcomings of the current mechanical and magnetic gear transmission are even more obvious. The traditional mechanical gear boxes have the construction of direct mechanical contact, whose disadvantages are low efficiency, noisy, apt to lubricate, easy to produce vibrations to be damaged and so on. And the existing magnetic gear is coaxial which can’t meet the need of angular transmission. In this paper, the construction of a kind of spatial angular magnetic gear, which has no direct mechanical contact between the driven axis and load axis, is proposed. Besides, the principle of the gear ratio is introduced and a concrete magnetic gear is analyzed. The results show that the range of the angle of this magnetic gear can be very large.

scholarly journals On the Impact of Maximum Speed on the Power Density of Electromechanical Powertrains

Vehicles ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 365-397 ◽  
Author(s):  
Daniel Schweigert ◽  
Martin Enno Gerlach ◽  
Alexander Hoffmann ◽  
Bernd Morhard ◽  
Alexander Tripps ◽  
...  
Keyword(s):  
Power Density ◽  
Gear Ratio ◽  
Electric Machines ◽  
Design Parameters ◽  
Maximum Speed ◽  
Climate Targets ◽  
Powertrain System ◽  
Reference Vehicle ◽  
The Impact ◽  
The Relationship

In order to achieve the European Commission’s ambitious climate targets by 2030, BEVs (Battery Electric Vehicles) manufacturers are faced with the challenge of producing more efficient and ecological products. The electromechanical powertrain plays a key role in the efficiency of BEVs, which is why the design parameters in the development phase of electromechanical powertrains must be chosen carefully. One of the central design parameters is the maximum speed of the electric machines and the gear ratio of the connected transmissions. Due to the relationship between speed and torque, it is possible to design more compact and lighter electric machines by increasing the speed at constant power. However, with higher speed of the electric machines, a higher gear ratio is required, which results in a larger and heavier transmission. This study therefore examines the influence of maximum speed on the power density of electromechanical powertrains. Electric machines and transmissions with different maximum speeds are designed with the state-of-the-art for a selected reference vehicle. The designs are then examined with regard to the power density of the overall powertrain system. Compared to the reference vehicle, the results of the study show a considerable potential for increasing the power density of electromechanical powertrains by increasing the maximum speed of the electric machines.

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