Wireless Power Transfer System for Rotary Parts Telemetry of Gas Turbine Engine

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.

Simulation Model of a 2-kW IPT Charger with Phase-Shift Control: Validation through the Tuning of the Coupling Factor

“…Note that the inductances L P -M and L S -M that appear in the T-model coincide with L Pk and L Sk only if r = 1. Expressions (1), (2) and 3show that IPT systems, for which k is necessarily low, have non-negligible leakage inductances.…”

“…Considering that the mutual inductance M between square coils is (4/π) 2 times larger than between circular ones when the corresponding circumference is inscribed in the square [30], square rather than circular coils were chosen to design the coupling stage. The two coils, which were wound using Litz wire with a section of 6.28 mm 2 Mechanical stability was achieved by sandwiching each coil between two methacrylate plates. The air gap between the coils can be manually adjusted to the desired value by means of nylon screws placed at the corners of the holding plates.…”

“…The applications of wireless power transfer (WPT) technology, which is the contactless transmission of power by an electromagnetic field and was pioneered by Nikola Tesla over a century ago, cover an increasingly wider range of electrical goods. Some examples are cell phones, medical implants, engine telemetry, home electronic appliances, such as electric toothbrushes or some of the robot vacuum cleaners that have recently appeared, and electric vehicles (EV) [1,2]. Magnetic coupling WPT, which is a special case of non-radiative (or near-field) transmission [1,3], is suitable for power transfer over the moderate distances that are typical in EV wireless charging.…”

A Fractional-Order Element (FOE)-Based Approach to Wireless Power Transmission for Frequency Reduction and Output Power Quality Improvement

“…However, it is well known that current power electronics technologies cannot satisfy such high-frequency switching [12]; therefore, in order to meet the capability of contemporary power switches to realize WPT, it is of great necessity to propose new methods for reducing the resonant frequency. Traditionally, a pair of coil resonators were applied to mid-and long-range wireless power transfer, but this technique has a poor performance in energy transfer efficiency [13]. To solve this problem, a new method of using coil arrays at both the transmitter and receiver sides was introduced employing the technique of mid-range strong magnetic resonant coupling [14].…”

Correction: He, X.; et al. Wireless Power Transfer System for Rotary Parts Telemetry of Gas Turbine Engine. Electronics 2018, 7(5), 58

“…The authors wish to make the following corrections to the published paper [1]. There is a misprint in Equation 13, which expresses the mutual inductance M between two coils.…”