With two controllable switches, the efficiency of two‐switch buck‐boost converters can be optimised by adopting appropriate control schemes. Among schemes, when only one switch works at high frequency, losses converter reduced effectively, but complicated logic and compensation technique are needed for step‐up/down smooth transitions; both switches operate these low high‐voltage applications because serious switching losses. In this study, coupled inductor is introduced to reduce application...

This article addresses the fixed-time fault- tolerant consensus control problem for high-order nonstrict-feedback nonlinear multiagent systems under directed topology. A distributed observer is proposed to obtain accurate estimations of full states leader. Different from design methods, a much more concise estimate upper bound convergence time provided. Based on and adding power technique, tracking protocol designed group followers subject unknown nonidentical dynamics unpredictable...

With the application of high frequency power electronic devices, planar transformer has been widely used in low voltage and current module supplies. Under working conditions, due to existence effects such as skin proximity effect, winding losses increase take a huge part total loss transformer. And conventional one-dimensional model, which is currently for calculation flat rectangular losses, leads considerable error ignorance edge effect. Based on mechanism electromagnetic theory AC this...

Air-cored planar inductors play an important part in enabling high power-density, low weight, and low-profile design of high-frequency switched-mode power applications. However, the absence ferromagnetic core these makes magnetic field distribution them different from that cored transformers. Due to this difference, conventional winding loss calculation models like 1-D Dowell's model are not suitable for inductors. Therefore, article, improved two-dimensional analytical multilayered...

Due to the skin and proximity effect, winding losses of planar inductors under high frequency working conditions increase. The complex rectangular conductor makes calculation AC resistance difficult. And conventional Dowell's one-dimensional model, which is currently used for conductor's conductive leads a considerable error due ignorance edge effect. To eliminate error, this paper proposes two-dimensional analytical model based on electromagnetic theory, takes effect into consideration,...

The transportation sector is undergoing electrification to gain advantages such as lighter weight, improved reliability, and enhanced efficiency. As contributors the safety of embedded critical functions in electrified systems, better sizing electric machines vehicles required reduce cost, volume, weight. Although designs are widely investigated, existing studies mostly complicated application-specific. To satisfy multi-level design requirements power this study aims develop an efficient...

Wind power possesses a high level of non-linearity and non-stationarity which are the main barriers to developing an accurate wind prediction (WPP). In this regard, multiresolution wavelet decomposition (WD), based on discrete transform, is employed decompose time series (TS) into several components. Afterward, in feature selection (FS) stage, benefits from spatiotemporal relation among farms, double input symmetrical relevance (DISR) has been adopted find most suitable features predicting...

Due to the skin and proximity effect, conductive losses rectangular conductors under high frequency working conditions increase. And conventional one-dimensional model, which is currently used for calculation of conductor's losses, leads a considerable error due ignorance edge effect. To eliminate error, this paper proposes two-dimensional analytical model based on electromagnetic theory, takes effect into consideration, establishes new field determine boundary values isolated conductor,...

This paper presents a design method of highpower density, wide output LCC resonant converter, which is suitable for high frequency, voltage and power occasions. In addition, the planar transformer adopted by converter has low magnetic core loss at size greatly reduced. It advantages high-power efficiency, leakage, good heat dissipation electromagnetic radiation. The staggered structure used to reduce parasitic capacitance leakage inductance in process selection parameter calculation. working...

<title>Abstract</title> To solve the probleµ of large current ripple on low-voltage side interleaved switched capacitor bidirectional converter in energy storage systeµ, an parallel DC/DC based coupled inductors by using µagnetic integration technology is proposed. core can be effectively shared integrating discrete into a inductor, and coupling coefficient adjusted to fully utilize flux, thereby increasing inductance value iµproving side. Based analysis relationship aµong value, duty cycle...

In this paper, an optimal multi-degree open-circuit faults diagnostic algorithm, for improving condition monitoring ability of photovoltaics, has been proposed. This algorithm combines output parameters and characteristic impedance PV-system under low frequency domain in simplified manner. The feasibility accuracy the method proven through simulation using Siemens-SM100-12.

Due to the skin and proximity effect, conductive losses of rectangular conductor under high frequency working conditions increase. And conventional one-dimensional model, which is currently used for calculating conductor, leads a considerable error due ignorance edge effect. To eliminate error, this paper proposes simple technique evaluating AC isolated including effects based on two-dimensional simulation results. The proposed introducing set 2-D factors formulas account finite element...

Distributed DC Power System is easy to integrate the renewable resources, and improve efficiency of power generating supplying, it draws attentions from all over world. However, system structures bus voltage range are lacking standards specifications, this makes hard design electronics devices. To accommodate with wide (260~400V), a bidirectional AC-DC converter consisted dual active bridge (DAB) cascaded full inverter studied in paper. For DAB stage, can be converted rated 400V by phase...

Planar air-core PCB-inductors provide an opportunity to lower the weight and increase power density of high-frequency switch-mode applications. The difference between field distribution in cored inductors makes conventional winding loss model no longer suitable for planar PCB-inductors. Based on fundamental electromagnetic theory, this paper proposes accurate 2D calculate a single-layer multi-turn PCB-inductor by incorporating edge effect its formulation. proposed model's accuracy is...

There are lots of issues existed with the Power Supply System in DC Building, and it is controversial as these have not been solved completely. In recent years, worldwide attention has focused on proposing standards "HVDC power supply system" or "up to 400Vdc feed following development system data center. Many attentions from research organizations institutions pointed out that can be applied Building. this paper, main HVDC introduced. Then some definitions among analyzed compared. The...

To enhance the efficiency and power density of switched-mode supplies, planar air-core magnetic components have gained more popularities. Without core to restrict flux, conventional reluctance model cannot be applied solve inductance for components. Based on uniform mesh Neumann's formula, this paper proposes an analytical calculate inductors. With simulation or measurement results as benchmark, relative error proposed is less than 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...