Magnetic Coupling Wireless Power Transfer (MCWPT) technology has broad application prospects due to its high degree of freedom in energy exchange and unparalleled security. In recent years, various controllers have been added to WPT systems to improve energy transfer performance. Among them, the Dual-Side Control (DSC) approach, which employs Dual-Active Bridge (DAB) converters with simultaneous control of the transmitter and receiver, has made great progress. The DAB structure has a compromise between cost and complexity, and the DSC can bring a high enough degree of control freedom to the MCWPT system to easily achieve efficiency optimization and desired output characteristics. However, various DSC methods have different characteristics. Therefore, this paper reviews and summarizes the current research status of DSC methods based on the DAB converters in MCWPT systems. Wireless communication is one of the decisive factors in the design of a control strategy, which is categorized in this paper according to the main approaches used in all the papers. Various DSC strategies are described in detail and compared comprehensively according to the control variables and control objectives. This review will be highly beneficial to research entities and industry professionals as a ready reference for the control design in MCWPT.

Fractional-order wireless power transfer (FOWPT) systems improve robustness by utilizing fractional-order components, addressing the performance degradation of traditional integer-order systems caused by parameter variations. However, they are still limited by the load range, coupling distance, and resonant frequency offset. Moreover, existing research seldom considers the influence of multiparameter changes such as coil self-inductance, mutual inductance, and load on the output characteristics in practical applications. Therefore, this letter proposes a parameter identification method for FOWPT system based on differential evolution algorithm, which realizes the simultaneous identification of multiple parameters including load, self-inductance, and mutual inductance. Based on the parameter identification results, a constant-voltage output control strategy is further presented. Experimental results show that the system stably outputs 12 V with an error of only 0.083%, verifying the feasibility and effectiveness of the proposed method and providing new insights for the optimization and application of FOWPT systems.

The variations of parameters in magnetically coupled resonant wireless power transfer (MCR‐WPT) system leads to system detuning problem. When the operation frequency is shifted from the resonant frequency of the system, output power of load (PL) will reduce greatly. The mathematical formulation of PL is similar to a multimodal function of the operation frequency. All the maximums of PL are needed to confirm the operation frequency. This study describes a dynamic niche artificial bee colony (DNABC) algorithm for locating all the optimums of multimodal function. By judging the increment of individual fitness, DNABC algorithm divides the solution space into peaky niche and candidate niche, and updates the boundary of niches dynamically. It transforms searching multiple maximum values in the whole solution space into searching one global maximum in each niche. Taking a 3‐coil MCR‐WPT system as an example, the simulation and experiment results show that DNABC algorithm is affected little by the number of population and has high convergence speed and high optimisation accuracy.

A L-band solid-state power amplifier (SSPA) for future payloads has been implemented using GaN Technology in this paper.The main performance of the GaN SSPA is superior to the GaAs SSPA.This paper propose device level redundancy of GaN along with various techniques such as gain compensation,Automatic level control and different parameter telemetry.The output power of SSPA is greater than 46dBm(20W), and efficiency achieves 50% at L band with an associated power gain of 59dB over the temperature range from -40 to +70 degC.The SSPA has the dimensions of 200mm× 130mm×54mm with a weight of 1.5kg.At the same time, the thermal design and Simulation of SSPA are carried out, and the reliability test is completed.

The nonlinear parity-time-symmetric wireless power transfer (PT-WPT) system has garnered significant attention for its robustness against variations in the coupling coefficient. Currently, the implementation of nonlinear negative resistance primarily relies on switch-mode converters. Among these, the conventional PT-WPT system based on self-excited converters faces challenges such as limited output power and overall system efficiency (OSE). In this article, we propose a novel dual-supply self-excited PT-WPT system designed to address these challenges, offering a cost-effective solution. We present the circuit, coupled-mode model, and PT-symmetric condition of the proposed system. Furthermore, stability criteria of the system at each equilibrium point are analyzed using Lyapunov’s first method. Finally, we implement a single-supply system to validate the correctness of the models and stability criteria. In addition, a dual-supply system is constructed, achieving an output power of 101.2 W with OSE of 89.2%.

The quasi-parity-time-symmetric wireless power transfer (Quasi-PT-WPT) system incorporates virtual impedance for soft-switching and enhanced system efficiency. This letter presents a thorough analysis of its transmission characteristics as a function of the gain–loss ratio, followed by a stability assessment via the describing function method (DFM). Furthermore, conditions for achieving constant current (CC) and constant voltage (CV) outputs are derived, and a load identification method is introduced to enable automatic CC/CV mode transition. Experimental results from a 30 V input prototype confirm stable CC and CV output at 2 A and 29 V, validate the stability criterion, and demonstrate its efficiency improvement.