Analysis and Design of Wireless Power Transfer System for Rotational Inertial Navigation Application

Abstract

Cables or slip-rings are often used to power loads on a rotating unit in the rotation modulated inertial navigation system (RMINS). However, these power supply methods have the disadvantages of cable winding and slip ring friction and wear, which reduces the reliability and life of the RMINS. Therefore, this paper applies magnetic coupling resonant wireless power transfer (MCRWPT) technology to the RMINS to avoid the shortcomings of the above power supply methods. Furthermore, according to the structure and working characteristics of the RMINS, a simple design method of the MCRWPT system without any feedback control is proposed. Based on the ANSYS simulation, the magnetic shielding structure is designed to reduce magnetic leakage, and the efficiency of the MCRWPT system is optimized by designing the excitation frequency. Experiments verify the effectiveness of the proposed method. The experimental results show that the designed MCRWPT system can achieve an efficiency of 74.6% with an output power of 10 W and has been successfully applied to the uniaxial rotation module inertial navigation system. Finally, the design method of the MCRWPT system is simple, and it has guiding significance for the design of the wireless power transfer system in the RMINS.

An Improved Rotational Modulation Scheme for Tri-Axis Rotational Inertial Navigation System (RINS) with Fiber Optic Gyro (FOG)

“…RINS has a similar frame and rotation axis as the platform inertial navigation system, which can offset the constant and slowly-varying errors of the inertial measurement unit (IMU) and improve the navigation accuracy by about one order of magnitude [6][7][8][9]. RINS also has advantages in initial alignment [10,11] and self-calibration [12][13][14][15][16][17], which have drawn much attention recently [18][19][20][21]. Different kinds of single [22][23][24][25], dual [26][27][28], and tri-axis RINS [18,29,30] can be designed according to actual requirements.…”

Realization of Unity Power Factor Wireless Power Transfer System under Subnormal Operation Conditions

“…As one of the special transmission technologies for medium-and short-distance electric energy, wireless power transfer (WPT) technology has attracted more and more attention due to its unique advantages with respect to safety, convenience, and other advantages. Its applications mainly include low-power demand scenarios, such as those involving electronic equipment [1], smart home devices [2], and medical devices [3], and high-power energy transmission scenarios, such as those involving electric vehicles and industrial robots [4,5]. For a WPT system, various unavoidable factors, such as time-varying loads, uncertain coil distances, parameter detuning, and interoperability scenarios, can introduce deviations from normal operating conditions [6,7].…”

Wireless Power Transmission System for Powering Rotating Parts of Automatic Machineries

“…In general, there are two ways to connect such accessories. One is to use a spindle head rotation of the machine to operate the technological accessories and the second is to drive accessories externally [5][6][7][8].…”