Simulation Analysis of Thermal Behavior of a Motorized Spindle

2011 ◽  
Vol 308-310 ◽  
pp. 111-114
Author(s):  
Bao Ming Wang ◽  
Xue Song Mei ◽  
Zai Xin Wu ◽  
Chi Bing Hu
Keyword(s):  
Power Management ◽  
Power Supply ◽  
Energy Cost ◽  
High Speed ◽  
Simulation Analysis ◽  
Transmission Protocol ◽  
Master Node ◽  
Motorized Spindle ◽  
The Status ◽  
System Energy

MOST bus protocol is a high speed multimedia transmission protocol which applies to the in-vehicle entertainment system to solve wiring difficulty, EMI and so on. However, with the increasing number and complexity of the in-vehicle entertainment devices, the energy consumption of system grows continuously. In the paper, a kind of the centralized power management based on the MOST networks is designed. The PowerMaster function in the MOST Master node can control and change the status of every device node by monitoring the running situation of the whole MOST networks. At last, the experiment indicates that the PowerMaster can manage the power supply of the MOST networks effectively. Under the control of the PowerMaster, the system energy cost is lower than before.

Design of the Centralized Power Management Based on the MOST Networks

2011 ◽  
Vol 308-310 ◽  
pp. 994-999
Author(s):  
Yu Shan Jin ◽  
Xing Ran He ◽  
Rui Kai Liu ◽  
Yong Ping Huang
Keyword(s):  
Energy Consumption ◽  
Power Management ◽  
Power Supply ◽  
Energy Cost ◽  
High Speed ◽  
Transmission Protocol ◽  
Multimedia Transmission ◽  
Master Node ◽  
The Status ◽  
System Energy

MOST bus protocol is a high speed multimedia transmission protocol which applies to the in-vehicle entertainment system to solve wiring difficulty, EMI and so on. However, with the increasing number and complexity of the in-vehicle entertainment devices, the energy consumption of system grows continuously. In the paper, a kind of the centralized power management based on the MOST networks is designed. The PowerMaster function in the MOST Master node can control and change the status of every device node by monitoring the running situation of the whole MOST networks. At last, the experiment indicates that the PowerMaster can manage the power supply of the MOST networks effectively. Under the control of the PowerMaster, the system energy cost is lower than before.

scholarly journals A distributed power management design based on MOST networks

2011 ◽  
Vol 8 (4) ◽  
pp. 1097-1115
Author(s):  
Yushan Jin ◽  
Ruikai Liu ◽  
Xingran He ◽  
Yongping Huang
Keyword(s):  
Power Management ◽  
High Speed ◽  
Transport Protocol ◽  
Master Node ◽  
Sleep State ◽  
Distributed Power ◽  
Modeling And Analysis ◽  
Network State ◽  
Intelligent Management ◽  
Audio Video

MOST (Media Oriented Systems Transport) protocol is a high-speed multimedia bus protocol. The system can make more and more media devices in the car automatically collaborate, sharing of audio, video and other data, but its own power consumption has not been a better optimization. In the paper, depending on the network management and the notification mechanism, a distributed power management solutions was designed that the slave nodes can sleep independently and the master node manages the network state, and the wake-up mechanisms in the sleep state were proposed. A mathematical modeling and analysis of MOST networks power were built in MATLAB. This program takes full advantage of MOST network protocol for the intelligent management. Simulation results shown that, with the increasing number of nodes in MOST, energy saving become more effective. More than 20% power saved can be achieved with distributed power management solution in 8-node MOST.

Analysis on the Influence of Vibration Performance of Air-Gap of Ceramic Motorized Spindle

2011 ◽  
Vol 335-336 ◽  
pp. 547-551 ◽  
Author(s):  
Li Xiu Zhang ◽  
Yu Hou Wu ◽  
Li Yan Wang
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
High Strength ◽  
Air Gap ◽  
Motorized Spindle ◽  
Effect Change ◽  
Rotating Speed ◽  
Engineering Ceramic ◽  
Vibration Performance ◽  
The Ideal

Engineering ceramic is the ideal material for high-speed and high precision motorized spindle due to perfect characteristics of light weight, wear resistance, high temperature, high strength, and so on. The air-gap is changed due to the influence from various factors not only the tolerance of the manufacture and assembly of motorized spindle but also different working condition. The change of air-gap impacts on vibration performance of motorized spindle. The effects of rotating speed and air-gap between the rotator and stator on these characteristic parameters of the motorized spindle are analyzed. This paper analyses the effect change of air-gap on vibration performance of motorized spindle by the simulation analysis and experimental. The results show that vibration increase with the decrease of air-gap. Meanwhile, electromagnetic vibration increase with the increase of eccentricity of motorized spindle. These results are very helpful to the structure optimization and application of the ceramic motorized spindle.

Numerical Simulation Analysis of Temperature Field for Motorized Spindle of High-Grade CNC Machine Tool Based on ANSYS

2010 ◽  
Vol 455 ◽  
pp. 33-36 ◽  
Author(s):  
C.Q. Li ◽  
Xiao Dong Zhang ◽  
Q. Zhang ◽  
H. Li
Keyword(s):  
Temperature Field ◽  
Machine Tool ◽  
High Speed ◽  
Thermal Deformation ◽  
Simulation Analysis ◽  
Transient Temperature ◽  
High Grade ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Motorized Spindle

To solve the problems that the thermal deformation of the High-Grade CNC machine tool has much effect on accuracy and quality of the produces, the structure characteristics of the high speed motorized spindle is firstly introduced in this paper. Then one type of motorized spindle and supporting structure are selected, and the thermal boundary parameters are calculated. Much more the static and transient temperature field are simulated by using FEA software ANSYS in one working condition. At last, the main measures to improve the uneven temperature field and the plans to reduce the thermal deformation are put forward, which are provided some technical bases for the equipment to achieve the high-speed and high-precision machining.

scholarly journals Optimal microgrid power supply system for Nigerian detached communities: Environmental impact and energy cost criteria

2021 ◽  
Vol 40 (3) ◽  
pp. 491-500
Author(s):  
J.G. Akinbomi ◽  
L.C. Ezeilo ◽  
O. Fagbuyi ◽  
L. Onyebueke
Keyword(s):  
Climate Change ◽  
Developing Countries ◽  
Environmental Impact ◽  
Power Supply ◽  
Energy Cost ◽  
Developed Countries ◽  
Study Data ◽  
Global Challenge ◽  
The Status ◽  
Battery Energy

Climate change is a major contemporary global challenge. For developing countries like Nigeria, further challenge is poor power supply. Traditional power supply strategy has been through fossil-fuel based macrogrids. While most developed countries are replacing some macrogrids with renewable energy based microgrids, developing countries like Nigeria still maintain the status quo. This study intends to contribute to knowledge in the management of climate change and power supply in Nigeria through the adoption of microgrids as power supply strategy. In the study, data collected from a detached energy consuming community in Nigeria was used in a simulation using HOMER software for five different scenarios of energy resources combination, based on environmental impact and energy cost criteria. Results indicate that microgrids combining solar photovoltaic (SPV) and grid connection with battery energy storage (BES) are best in on-grid detached communities while microgrids combining diesel generators and SPV with BESare good for off-grid communities.

Ensuring electrical safety of power supply systems of electrified AC railways for highspeed lines

2018 ◽  
Vol 77 (6) ◽  
pp. 337-346 ◽  
Author(s):  
A. B. Kosarev ◽  
A. V. Barch ◽  
E. N. Rozenberg
Keyword(s):  
Power Supply ◽  
High Speed ◽  
Structural Features ◽  
Electrical Safety ◽  
Safe Operation ◽  
Ballastless Track ◽  
Conventional Structure ◽  
Artificial Earth ◽  
Earth Connection ◽  
Supply Systems

Abstract. High-speed railways are fast-growing and promising type of traffic. In Russia development of high-speed railway service is associated with the solution of a number of problems, including infrastructure. Authors propose to use earth connection of the railway catenary with the help of an artificial earthing switch on currently designed high-speed line Moscow—Kazan for 2×25 kV power supply system. Taking into account requirements for electrical safety conditions for maintenance of the track and earthed catenary supports, paper justifies method for calculating allowable voltages of rail—earth points and supports of catenary. Methods takes into account structural features of ballastless track superstructure used for high-speed lines. It is estimated that the voltages admissible under the electrical safety conditions are random in nature and distributed logarithmically normal. When calculating probability of safe operation, one should take into account random nature of both permissible stresses and those actually occurring on the track. It is estimated that the probability of safe operation in traction networks of sections with ballastless track superstructure does not exceed a similar value in electrified sections with the conventional structure of a ballast prism. Feasibility of using a 2×25 kV earth system using an artificial earth connection is confirmed, recommendations on its use are given. Authors substantiate allowable values of the rail—earth voltage and catenary supports, which practically exclude the occurrence of hazardous situations for personnel maintaining the track in sections with ballastless track superstructure.

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