scholarly journals Efficiency Estimation of Roller Chain Power Transmission System

2020 ◽  
Vol 10 (21) ◽  
pp. 7729
Author(s):  
Sheng-Peng Zhang ◽  
Tae-Oh Tak
Keyword(s):  
Sliding Friction ◽  
Power Transmission ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Damping Coefficient ◽  
Damping Force ◽  
Roller Chain ◽  
Power Transmission System ◽  
Novel Approach ◽  
Efficiency Estimation

In the present study, a novel approach to estimating the efficiency of roller chain power transmission systems is proposed based on sliding friction losses and damping force. The dynamics model is taken into account between chain links with lateral offset owing to the derailleur system. Frictional losses were calculated according to Coulomb’s law of friction, and the damping force was dependent on the damping coefficient. The effects of rotational speed, load, derailleur system, and damping coefficient on transmission efficiency were analyzed. The test stand of the roller chain power transmission system was set up to verify the estimated efficiency, and the results showed a good correlation, demonstrating the validity of the chain power transmission efficiency estimation.

Paper 11. The Development of a Roller Chain Power Transmission System for the Automobile

1969 ◽  
Vol 184 (9) ◽  
pp. 192-209
Author(s):  
D. N. C. Davies ◽  
P. J. Owen
Keyword(s):  
Power Transmission ◽  
Transmission System ◽  
Primary Chain ◽  
Roller Chain ◽  
Power Transmission System ◽  
Satisfactory Life ◽  
High Standards ◽  
Chain Drives

The paper describes the development of primary chain drives, especially for those cars which have transverse engines driving the front wheels. Particular attention is paid to the development of satisfactory means of adjustment and the achievement of high standards of silence in operation under all conditions, coupled with satisfactory life in service. Intensive rig and road tests, and the means of measuring results are described. The conclusions reached thus far are summarized.

Pulse-Driving Based Magnetic Coupling Resonant Wireless Power Transmission System Research

2011 ◽  
Vol 378-379 ◽  
pp. 539-542
Author(s):  
Qiang Wang ◽  
Hong Li
Keyword(s):  
Optimization Design ◽  
Power Transmission ◽  
Magnetic Coupling ◽  
Transmission Efficiency ◽  
Transmission System ◽  
System Research ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System ◽  
Magnetic Resonances

This paper analyses and designs a kind of pulse-driving based wireless power transmission system via coupled magnetic resonances. It analyzes the influence of the related parameters on the transfer efficiency and transfer power of the system. The experiment tests the proposed wireless power transmission system, and the results show that the above relevant parameters should be comprehensively considered, in order to achieve the optimization design of the transmission efficiency or transmission power. The experiment results also show the validity of the theoretical analysis.

Three-phase receiving coil of wireless power transmission system for gastrointestinal robot

2017 ◽  
Vol 31 (32) ◽  
pp. 1750277 ◽  
Author(s):  
Z. W. Jia ◽  
T. Jiang ◽  
Y. Liu
Keyword(s):  
Power Transmission ◽  
Asynchronous Motor ◽  
Animal Experiments ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System ◽  
Three Phase

Power shortage is the bottleneck for the wide application of gastrointestinal (GI) robot. Owing to the limited volume and free change of orientation of the receiving set in GI trace, the optimal of receiving set is the key point to promote the transmission efficiency of wireless power transmission system. A new type of receiving set, similar to the winding of three-phase asynchronous motor, is presented and compared with the original three-dimensional orthogonal coil. Considering the given volume and the space utilization ratio, the three-phase and the three-orthogonal ones are the parameters which are optimized and compared. Both the transmission efficiency and stability are analyzed and verified by in vitro experiments. Animal experiments show that the new one could provide at least 420 mW power in volume of [Formula: see text] with a uniformity of 78.3% for the GI robot.

Research on the torsional vibration performance of a CVT powertrain with a dual-mass flywheel damper system

2021 ◽  
pp. 095440702110366
Author(s):  
Zhengfeng Yan ◽  
Dale Yin ◽  
Lei Chen ◽  
Weilei Shen
Keyword(s):  
Optimization Design ◽  
Power Flow ◽  
Power Transmission ◽  
Ride Comfort ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Torsional Stiffness ◽  
Speed Ratio ◽  
Power Transmission System ◽  
Before And After

Continuously variable transmissions (CVTs) can achieve continuous changes in speed ratio and can better improve the ride comfort of the car. However, the torque fluctuation of the engine will reduce its transmission efficiency, and the torsional damper is usually matched to improve transmission efficiency and reduce vibration noise. In this paper, the model of a complete vehicle power transmission system was established by using the bond graph method. The relationships between each state variable were obtained according to the system causality and the direction of the power flow, based on which the dynamic model of the entire vehicle power transmission system was derived. A simulation of the powertrain with dual-mass flywheel-continuously variable transmission (DMF-CVT) was carried out, and the torsional stiffness of the dual-mass flywheel (DMF) was optimized. Taking a certain sport-utility vehicle (SUV) as the test bench, the vehicle road testing of the DMF before and after improvement was carried out, and the test results before and after the improvement were compared to verify the correctness of the optimization direction, which provided a reference for the matching and optimization design of the DMF-CVT power transmission system.

Structure and circuit solution of a wireless power transfer system for application in mobile robotic systems

2021 ◽  
Vol 9 (3) ◽  
pp. 196-206
Author(s):  
Konstantin Krestovnikov ◽  
Аleksandr Bykov ◽  
Aleksei Erashov
Keyword(s):  
Power Transmission ◽  
Frequency Control ◽  
Maximum Level ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Transmitted Power ◽  
Monitoring And Control ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System

This paper presents the development of a medium-power wireless power transmission system for use in robotics and other applications. The presented system can be used to power devices or charge batteries. The system is based on the principle of inductive power transmission. A feature of the system is the use of a resonant self-oscillator, for which the transmitting LC circuit of the system is a frequency setting. The use of identical receiving and transmitting resonant circuits makes it possible to refuse additional frequency control devices in the receiving part of the system. The presented circuitry solution of the wireless power transmission system ensures operation in the resonance mode in the receiving and transmitting circuits, where the receiving and transmitting coils are at various positions relative each other, while not requiring a dedicated monitoring and control system for this. Experimental verification of the proposed solution was carried out on a prototype of a system with shell elements, shielding from magnetic fields, while the maximum level of efficiency of the system without an output stabilizer in the receiving part was 80.41%, with a transmitted power of 131.5 W, at a transmission distance of 15 mm. The dependency curves of the efficiency and the transmitted power were obtained for three distances of energy transfer — 0 mm, 15 mm and 30 mm. With distances between the coils up to 30 mm, the efficiency of the system is above 70% with a transmitted power of more than 55 W. Key words Wireless charging system, wireless power transmission, resonant oscillator, wireless power transmission efficiency. Acknowledgements This research is supported by the RFBR, project no.19-08-01215_А.

Wireless Power Transmission System of Radio-Telemetry System for Physiological Parameters Detection

2014 ◽  
Vol 989-994 ◽  
pp. 1068-1072
Author(s):  
Zhi Wei Jia ◽  
He Ran Ren ◽  
Guo Zheng Yan
Keyword(s):  
Power Transmission ◽  
Radio Telemetry ◽  
Three Dimensional ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Physiological Parameters ◽  
Telemetry System ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System

To deal with the power shortage of the implantable radio-telemetry system for animal physiological parameters dictation, a wireless power transmission system based on electromagnetic induction is proposed. The parameters of the couple coils are optimized considering the safety and stability of this power transmission, transmitting coil of rectangle section solenoid and three-dimensional receiving coil are selected. Experiments show that at least 150mW power could pick up on the load in a volume of Φ10.5 mm×11 mm with a transmission efficiency of 2.56%. Vivisection experiments verified the feasibility of the integrated radio-telemetry system based on this power supply technology.

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