Abstract
A novel wireless power transfer approach for the rotary parts telemetry of a gas turbine engine is proposed. The advantages of a wireless power transfer (WPT) system in the power supply for the rotary parts telemetry of a gas turbine engine are introduced. By simplifying the circuit of the inductively-coupled WPT system and developing its equivalent circuit model, the mathematical expressions of transfer efficiency and transfer power of the system are derived. A mutual inductance model between receiving and transmitting coils of the WPT system is presented and studied. According to this model, the mutual inductance between the receiving and the transmitting coils can be calculated at different axial distances. Then, the transfer efficiency and transfer power can be calculated as well. Based on the test data, the relationship of the different distances between the two coils, the transfer efficiency, and transfer power is derived. The proper positions where the receiving and transmitting coils are installed in a gas turbine engine are determined under conditions of satisfying the transfer efficiency and transfer power that the telemetry system required.
Highlights
With the ever-increasing demand for power, the work states of aircraft engine components have been pushed to their physical limits
By taking the inductively coupled wireless power transfer (WPT) system as a model and the distance between receiving and transmitting coils as a variable, this paper studies the relation between the coil distance, transfer efficiency, and transfer power of the WPT system, and the mutual inductance model and the system circuit model are validated
The test data and the theoretical analysis prove that the WPT system could ensure the working requirements of the rotary parts telemetry of gas turbine engines, and provide a reference to find a suitable position to install the primary and secondary coils on the gas turbine engine
Summary
With the ever-increasing demand for power, the work states of aircraft engine components have been pushed to their physical limits. In order to prevent the telemetry system from being damaged when the aircraft engine works in high-altitude environments, a cooling system was designed to ensure the normal operation of the telemetry module. The work of Keyes et al [4] introduced a high-temperature active wireless telemetry system that could withstand the engine’s poor working environment and provide real-time diagnosis and maintenance. In order to solve this problem, Mitchell et al [6] presented an engine component that is integrated with high-temperature sensors and a wireless telemetry system. Wireless power supply technology was adopted to design a power system for gas turbine engine rotor parameters telemetry. The other one is that the simulation and test have verified that the WPT system can meet the requirements under the adverse effects of aircraft engine operation, where the axial distance between WPT-TX (Transmitting Unit) and WPT-RX (Receiving Unit) can be changed and the WPT system has coils lateral displacement
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