When the coils of wireless power transmission system based on a traditional topology is physically offset, the coupling coefficient between the coils will change significantly, which further leads to drastic changes in the output power of the system. This problem limits the application and promotion of wireless power transmission. In order to solve the problem of output power imbalance caused by coils' offset, this paper takes the wireless power transmission system of LCC-S type as an example, and proposes an optimization scheme for anti-offset performance based on the optimization design of compensation topology parameters. This scheme uses two freely adjustable variables K 1 and K 2 to optimize the design of the compensation network parameters of the wireless power transmission system, so that the system can automatically adjust the transmit current of the primary coil to maintain relatively stable output power. Finally, we build a 120W experimental prototype. When the lateral offset percentage δ of the coil is less than 35%, the maximum fluctuation rate of the output power of the system is kept within 10%, and the efficiency of the whole machine is kept above 81%. INDEX TERMS Wireless power transmission (WPT), LCC-type compensation topology, tolerance of high misalignment, parameter optimization design.
In order to reduce the influence of slippage and improve the accuracy of 8×8 omnidirectional platform motion, this paper analyses the kinematic characteristic and builds the dynamic virtual model. A method of Back Propagation(BP) network is used to nonlinear motion compensation. Comparing simulation results before with after compensation, the data show that motion errors can be reduced, which indicates that the method is effective.
Traditional medical external fixation material represented by gypsum is brittle, heavy and prone to adverse reactions, clinical effect is not ideal. The pine wood fiber particles (size for 10 ~ 40 mesh) and polycaprolactone (PCL) are used to prepare a new kind of wood-plastic polycaprolactone composites (WPC) by the blending method. The experimental results show that the increase of PCL mass ratio can enhance the material strength and flexibility, especially the match force between the pine wood fiber particles. Meanwhile, when the mass ratio of PCL reached 65%, this enhancement effect significantly diminished; after the mass ratio of PCL reached 70%, the phenomenon of material mechanics performance decline. In this paper, the prepared WPC, which can soften under temperature 50°Cand repetitively finalize the design, have good mechanical properties, low-temperature thermoplastic and environment protection.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.