Design and Analysis of Non-Contact Power Supply System for Wireless Monitoring Node of Ship's Water Lubricated Bearing

Abstract

The wireless sensor monitoring node for the online monitoring of various parameters of the ship's water-lubricated bearing rotates with the shaft during its operation. Therefore, how to ensure a continuous power supply to the node under the rotating working condition is an urgent problem to be solved. In this paper, a non-contact power supply method is adopted to design a magnetically coupled inductive non-contact power supply system, and experimental verification is carried out. Firstly, the non-contact power supply method is described, a node energy consumption model is established for the existing wireless monitoring nodes, and the energy consumption test is conducted. Then, a magnetically coupled inductive non-contact power supply system is designed, and the output of the system circuit is simulated and analyzed. Finally, the experimental test of the power supply system is carried out to study various factors that affect the performance of the power supply system. The research results show that the rotational speed is not the key factor affecting the power supply effect of the system, and the air gap of the coupling mechanism is the key factor affecting the power of the power supply system. The output power of the power supply system increases with the increase of the air gap, and the output efficiency decreases with the increase of the air gap. Considering the influence of the efficiency factor of the power supply system, the 5mm air gap is the optimal working air gap of the power supply system, and the system output power can reach 15.9 W at this time.