Abstract
The online detection of metal shaft parameters, such as torque, power and deformation, is widely applied in engineering projects. The power supply of metal shafts is the key to the detection reliability and practicality. However, traditional slip ring and battery power supply are limited in reliability and service life. In this paper, a side-mounted inductive power supply system for the rotating metal shaft is designed by using a Utype core. The equivalent reluctance and circuit models of the system are analyzed, and the methods of improving the coupling coefficient and transmission efficiency are proposed from theoretical analysis. Through the finite element simulation analysis of the system, the general relationships between the transmission power and efficiency of the system and the number of coil turns, the working frequency and the load are analyzed. The accuracy of theoretical analysis and simulation analysis is verified by the practical power transmission experiments. This paper provides a novel and reliable power supply method for inductive power supply of rotating equipment, and enriches the solutions of rotating power supply.
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