Therefore, the characteristics of a cancellation coil with enhanced effectiveness based on an 8-shaped coil that reduces the leakage of magnetic fields were investigated using …
This study investigates cold thermal energy storage (CTES) using a helical coil heat exchanger modified with bubble injection. One of the effective methods for increasing the heat transfer rate in ...
A lumped-parameter ECM of an electromagnetic coil allows for a mathematical and physics-based treatment of the frequency-dependent impedance response. Consider the ECM for a single electromagnetic coil shown in Fig. 1. This model represents a single electromagnetic coil with insulation such as a coil used in a …
The [fault coil] nodes are used to locate the fault coil. Each [fault coil] node includes four properties (P FC1 –P FC4) to classify the fault coil. Each property corresponds to the numerical relationship between BRC. According to the analysis in Section 3, when the fault occurs in different branches, the BRC used to locate the fault …
A fault self-driven current limiter is proposed in the paper, which uses a special fault current direct-driven electromagnetic repulsion mechanism to realize the first half-wave of the fault ...
This article investigates the fault detection problem for a series–parallel inductive coupled power transfer (SP-ICPT) system with coil misalignment and external disturbances. Different from most of the existing modeling method, a novel generalized state-space averaging (GSSA) model, based on the Takagi–Sugeno (T–S) fuzzy …
Optimal energy management is a major challenge for most energy storage systems (ESSs), which is especially a big concern for the superconducting fault current limiter-magnetic ESS (SFCL-MES). To prevent malfunction, the superconducting coil (SC) current of the SFCL-MES needs to be controlled strictly within a well-defined operational …
A field cancellation method is investigated to minimize the magnetic field for the encircled circuits in WPT coils using a two-coil structure toward the best cancellation performance, …
1. Introduction. Countries have been exploring marine resources for the past few decades with the progress and development of ocean science and technology [1].As the vital carrier for underwater resource exploration and military patrol, unmanned underwater equipment (UUE) has become a research hotspot in the field of marine engineering, …
Energy storage can realise the bi-directional regulation of active and reactive power, which is an important means to solve the challenge . Energy storage includes pumped storage, electrochemical …
As for the energy exchange control, a bridge-type I-V chopper formed by four MOSFETs S 1 –S 4 and two reverse diodes D 2 and D 4 is introduced [15–18] defining the turn-on or turn-off status of a MOSFET as "1" or "0," all the operation states can be digitalized as "S 1 S 2 S 3 S 4."As shown in Fig. 5, the charge-storage mode ("1010" …
The electric and magnetic fields generated by transmission lines, at ground level, must be carefully analyzed to ensure low levels of induced voltage in surrounded …
Fault detection and diagnosis (FDD) is of utmost importance in ensuring the safety and reliability of electric vehicles (EVs). The EV''s power train and energy storage, namely the electric motor …
The voltage level of energy storage stations can reach 1500 V, while the voltage of electric vehicles falls within the range of 300–800 V. Therefore, the arc voltage induced by an energy storage station will be significantly higher than that of an electric vehicle, causing more severe accidents.
However, it has been found that these energy storage systems have few constraints linked to capacity (few Watts - few kiloWatts), power density, lifetime and response time. Development of Superconducting Magnetic Energy Storage (SMES) technology is one of the resolution as it can store high grade (electrical current) energy …
Electromagnetic Analysis on 2.5MJ High Temperature Superconducting Magnetic Energy Storage (SMES) Coil to be used in Uninterruptible Power Applications ... It has been concluded that higher currents can be used in order to lower down the total length of the superconductor as it can reduce the overall cost of the device ... Journal of …
In the inductive power transfer systems (IPTS) of wireless electric vehicles (WEV), the electromagnetic field (EMF) should be lowered for the safety of pedestrians. …
equipment certification that shows that the power transmis-sion is below the regulated value. The evaluation method to obtain the equipment certification is standardized; normally, the experiment equipment is taken into a shielded room, and the leakage electromagnetic field is measured from 10 me-ters(3)(12)(13). To measure the leakage ...
Reluctance coil guns are electromagnetic launchers having a good ratio of energy transmitted to actuator volume, making them a good choice for propelling objects with a limited actuator space.
In the battery system of energy storage stations, a DC arc fault may be caused by a loose electrical connection, aging and damaged insulation, a lack of regular …
Abstract In the inductive power transfer systems (IPTS) of wireless electric vehicles (WEV), the electromagnetic field (EMF) should be lowered for the safety of pedestrians. In general, the EMF sho... Skip to Article Content ... to only the secondary coil, where a relatively large EMF is generated due to high ampere-turns. An optimum spacing ...
Some systems omit transmit coil and receive coil, using only drive coil and load coil. Each pair of two coils can resonate between each other, so adding coils extends an effective range. The power transfer efficiency is a function of passive circuit parameters and the operating frequency, and generally maximum efficiency is achieved …
Aiming at the problem that the magnetic field of magnetic coupling wireless power transfer (MC-WPT) cannot be regulated arbitrarily as required, a magnetic field regulation method based on coordinate transformation principle is proposed in this paper. This method can adjust the magnetic field as needed, which can effectively improve the …
Power transformers are static devices transferring electrical energy between two circuits with separate systems of alternating voltages, by means of electromagnetic induction. They are used to connect power networks and components with different voltage levels. Transformers are essential components for the transmission, distribution, and utilization …
The crushing forces within the coil might be huge, however the forces exerted on the coil clamps may be zero 558 N. Hashemnia et al.: Improved Power Transformer Winding Fault Detection using FRA Diagnostics …
1. Introduction. The increasing automation of oil-gas production is the inevitable trend of oil-gas technology [1].As a core part of oil-gas field surface engineering, the oil-gas treatment station affects the production efficiency of the whole oil-gas gathering and transportation system [2, 3] plicated processes, centralized pressure vessels …
paper is to present a much more commercially feasible way: a fault current limiter-battery energy storage system (FCL–BESS) to solve the two problems. The topology of the FCL–BESS consists of two parts: the fault current limiter (FCL) part and the battery energy storage system (BESS) part. The FCL part is mainly used to enhance the LVRT
Fault detection and diagnosis (FDD) is of utmost importance in ensuring the safety and reliability of electric vehicles (EVs). The EV''s power train and energy storage, namely the electric motor drive and battery system, are critical components that are susceptible to different types of faults. Failure to detect and address these faults in a …
While effective as their simulation and test results show, it is mainly designed for vehicle application, requiring additional coils for magnetic field cancellation, …
With the development of industrial manufacturing intelligence, the role of rotating machinery in industrial production and life is more and more important. Aiming at the problems of the complex and …
Optimal energy management is a major challenge for most energy storage systems (ESSs), which is especially a big concern for the superconducting fault current …
The current research of battery energy storage system (BESS) fault is fragmentary, which is one of the reasons for low accuracy of fault warning and diagnosis in monitoring and controlling system of BESS. ... Affected the released energy and heat transfer after separator rupture: Increased SOC, ambient temperature and decreased …
In recent years, underwater wireless power transmission technology has developed rapidly. Research on omnidirectional wireless power transmission technology in underwater spatial has become increasingly important. Underwater electromechanical devices in the wireless power transmission process and submarine currents'' interference …
The wireless power transfer (WPT) is a transfer of the electric energy across an air gap without any physical contact. Which recently appeared as the wireless charging [1][2] [3] [4]. Despite all ...
This study investigates cold thermal energy storage (CTES) using a helical coil heat exchanger modified with bubble injection. One of the effective methods for increasing the heat transfer rate in ...
In this paper, we present a kind of null-coupled cancelling (NCC) coil to shield electromagnetic fields (EMF) for wireless power transfer (WPT) systems.
