This article examines the performance of a 13-kW high-power inductive power transfer system utilizing hybrid core structure with novel nanocrystalline ribbon cores and flake ribbons. Conventional laminated exhibit excessive edge losses due to high flux density concentrated on eddy current in lateral wall, potentially causing partial thermal runaway. To mitigate this issue, it is proposed employ ribbons as shielding material while maintaining main magnetic coupler. The evaluated under...

Conventionally, the magnetic core in an inductive power transfer (IPT) system is spliced by pieces of ferrites, which time-consuming and unable to realize a seamless fit on curved surface. This letter proposes compact coupler with novel flexible nanocrystalline flake ribbon (NFR) core. Compared ferrite core, NFR not only enhances application flexibility IPT but also significantly reduces its weight certain power. Based <italic xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper proposes the design and analysis of an inductive power transfer (IPT) system that features novel nanocrystalline flake ribbon (NFR) cores. The ribbons are produced by compressing dielectric material with ribbons, leading to a reduction in eddy current loss. A complete magnetic core is then fabricated laminating imparting anisotropic properties. outlines methodology for NFR cores, considering this lamination characteristic Double-D IPTs. Accordingly, cores factor 0.375 thickness...

Inductors are the essential components in electronic devices, but nonuniform magnetic flux density distribution (MFDD) toroidal cores will lead to premature saturation and reduced material utilization. To address this problem, we propose a nanocrystalline core with permeability gradient (PG) along radius direction. The of flake ribbon (NFR) can be easily adjusted through physical crushing process, providing fabrication condition for PG-NFR core. influence sublayer number PG simulated...

ABSTRACT This article presents a novel single excitation source multistage wireless power transfer (WPT) system, capable of efficiently delivering to multiple loads via magnetic resonance coupling. system facilitates concurrent energy transmission at different locations, eliminates cable limitations on manipulator flexibility, prevents damage due frequent twisting, and exhibits great potential in applications like arms for remotely operated vehicles (ROVs). Firstly, principle the WPT based...

Dynamic wireless charging (DWC) technology can help alleviate the problem of short driving range for battery-powered vehicles. In this article, a model predictive control (MPC) is applied to buck converter on secondary side DWC system address fast output fluctuations. This approach features fast-dynamic response, and no communication link required. To solve key issue MPC, which computational burden, polynomial fitting method based parsing solution sampled-data proposed. The complex matrix...

Nanocrystalline magnetic cores have been applied in inductive power transfer (IPT) systems as novel materials for their high saturation capability and flexible application. However, the loss of eddy current is still a primary concern nanocrystalline material. This letter investigates two crushing patterns, namely square-crushing dot-crushing, flake ribbon (NFR) to mitigate IPT applications. In experiment, 1 kW prototype with curved coupler autonomous underwater vehicles (AUVs) built verify...

Wireless power transfer (WPT) technology has been paid more attention due to its safety and convenience. The control strategy is one of the core concerns for electronics. This paper proposed a secondary periodic energy (SPEC) method, which can be used WPT systems other topologies in flowing into load each switching period regulated by controlling DC/DC converter before load. SPEC inherits advantages primary response speed, overshoot suppression, mutual inductance variation. Moreover, it...

For inductive power transfer (IPT) systems, inevitable coupling variations caused by misalignment will decrease the efficiency and result in unstable output power. Many methods have been applied to improve tolerance, but few focus on frequency-detuned operating situations. This paper proposes a new approach based combination of slightly detuned LCC-S S-S compensation topologies achieve relatively constant over wide range. Two perform better anti-offset than resonant ones. The can be limited...

Inductive power transfer (IPT) technology has attracted more attention due to its convenience and safety. The mathematical model is an effective tool for analyzing optimizing the performance of IPT systems. Many previous articles on modeling equate load a pure resistor, which can simplify process. However, this assumption not reliable battery load. In paper, discrete-time derived system with constant voltage Four switching modes are defined in each cycle according states inverter rectifier,...

This paper proposes a coupling estimation method for wireless power transfer (WPT) systems with constant voltage load (CVL). The involves calculating the zero-phase angle (ZPA) frequencies, which are found to be solely dependent on and independent of output in WPT CVL frequency bifurcation. By leveraging this unique characteristic, self-oscillation is employed automatically locate ZPA points, enabling rapid accurate estimation. proposed highly effective across entire range couplings does not...

Physical misalignment between the transmitter coil and receiver is inevitable in inductive power transfer (IPT) systems, which will lower coupling coefficient then mutual inductance, causing a reduction transmission efficiency to some extent. In this paper, slightly detuned compensated IPT system series-series topology proposed realize stable output over wide range by simple frequency voltage modulation. Unlike other methods, there are no extra control modules, closed-loop feedback, complex...

This paper focus on the PMSMs design aspects minimization of current ripples without adding additional inverter components. The analytical model is developed. high frequency harmonic components' expression stator MMF derived based this model. For further investigation, method to with minimized discussed. influences key parameters are investigated. Finite element analyses and experimental results used verify

In this article, we propose a direct three-phase single-stage ac–ac system based on pulse density modulation (PDM) for the series resonant load. Compared with traditional multistage ac–dc–ac system, bus capacitors among dc stage can be eliminated and good grid-side current quality is achieved. Unlike pulsewidth modulation, PDM has fewer switching times devices, which reduce power loss. high-quality achieved without applying any additional factor correction device. Furthermore, detailed...