Electronics | Free Full-Text | Magnetic Field Saturation of Non …
This study employs an equivalent circuit grid model, coupled with magnetic field calculation and the E–J power law of superconductors, to deeply and …
Application potential of a new kind of superconducting energy storage…
Superconducting magnetic energy storage can store electromagnetic energy for a long time, and have high response speed [15], [16]. Lately, Xin''s group [17], [18], [19] has proposed an energy storage/convertor by making use of the exceptional interaction character between a superconducting coil and a permanent magnet with high …
Tilted Toroidal Coils for Superconducting Magnetic Energy Storage Systems …
Abstract. Superconducting magnetic energy storage (SMES) systems can be used to improve power supply quality and reliability. In addition, large amounts of power can be drawn from a small stored ...
Online diagnosis of broken rotor bar fault of squirrel-cage induction motor using a magnetic field measuring coil …
Hebei Key Laboratory of Distributed Energy Storage and Micro-grid, North China Electric Power University, Yonghua Street No.619, Baoding, 071003 China Correspondence to: Qingfei An. E-mail: anqingfei1994@163 Search for …
Test equipment for a flywheel energy storage system using a magnetic bearing composed of superconducting coils and superconducting bulks …
Test equipment for a flywheel energy storage system using a magnetic bearing composed of superconducting coils and superconducting bulks M Ogata 1, H Matsue 1, T Yamashita 1, H Hasegawa 1, K Nagashima 1, T Maeda 2, T Matsuoka 3, S Mukoyama 3, H Shimizu 4 and S Horiuchi 5
Coupled Electromagnetic-Dynamic Modeling and Bearing Fault Characteristics of Induction Motors considering Unbalanced Magnetic …
Induction motors are complex energy conversion systems across the domains of dynamics, electricity, and magnetism. Most existing models mainly consider unidirectional coupling, such as the effect of dynamics on electromagnetic properties, or the effect of unbalanced magnetic pull on dynamics, while in practice it should be a …
Superconducting magnetic bearing for a flywheel energy storage system using superconducting coils and bulk superconductors …
An increase in the stored energy in the flywheel is possible by increasing the load capacity, which can be achieved by using a superconducting coil as a magnetic source instead of a permanent magnet. Fig. 1 shows a flywheel power-storage facility that applies superconductive magnetic bearings consisting of a bulk superconductor and a …
Development of superconducting magnetic bearing with superconducting coil and bulk superconductor for flywheel energy storage …
We have proposed superconducting (SC) magnetic bearings using SC coil and bulks. • We manufactured a small scale test device based on our concept. • The device levitated a rotor without mechanical contact. • The …
(PDF) A Study on Superconducting Coils for Superconducting Magnetic Energy Storage …
PDF | Superconducting coils (SC) are the core elements of Superconducting Magnetic Energy Storage (SMES) systems. It is thus ... conductor pancak e coil with ferromag netic parts. Superconduc tor ...
Enhancing Low-Voltage Ride-Through Capability and Smoothing Output Power of DFIG With a Superconducting Fault-Current Limiter–Magnetic Energy ...
Two major problems that are faced by doubly fed induction generators are: weak low-voltage ride-through capability and fluctuating output power. To solve these problems, a superconducting fault-current limiter-magnetic energy storage system is presented. The superconducting coil (SC) is utilized as the energy storage device for …
Performance investigation and improvement of superconducting energy storage coil …
This paper introduces strategies to increase the volume energy density of the superconducting energy storage coil. The difference between the BH and AJ methods is analyzed theoretically, and the feasibility of these two methods is obtained by simulation comparison. In order to improve the volume energy storage density, the rectangular …
Overview of the Electromagnetic Optimization Literature of …
Superconducting solenoids are the basis of magnetic resonance imaging machines and superconducting energy storage systems. As the literature has evolved and many …
Full article: An online fault-diagnosis of electromagnetic actuator …
As the same as in Figure 1, the upper part include a current control loop, and will provide electromagnetic coil with the load current equalling to the desired current i*. The inputs of proposed FDD are the current sampling points from the current sensor, and these points will be restored in the queue, used to calculate the slope, as in Equation (19).
Electromagnetic Analysis on 2.5MJ High Temperature …
This work represents the development of 2.5MJ SMES solenoidal Magnet using 2G (SuperPower, YBCO having Tc=90K @ 0T) HTS tape. The effect of the …
Energy Storing and Fault Current Limiting in a Unified …
This work describes a novel concept for unifying Superconducting Magnetic Energy Storage (SMES) and an inductive-type Fault Current Limiter (FCL). A single …
Development of Superconducting Magnetic Bearing for Flywheel Energy Storage …
The superconducting module was cooled to 50 K and Ic was measured. The cooling was a conduction cooling with a refrigerator, and the measurement was done in the cryostat prepared for the measurement with cooling. The temperature of 50 K was controlled to energize a heating wire installed in the refrigerator.
Enhancing the design of a superconducting coil for magnetic energy storage …
Study and analysis of a coil for Superconducting Magnetic Energy Storage (SMES) system is presented in this paper. Generally, high magnetic flux density is adapted in the design of superconducting coil of SMES to reduce the size of the coil and to increase its energy density. With high magnetic flux density, critical current density of the …
Overview of the Electromagnetic Optimization Literature of Superconducting Solenoidal Magnets and Coils …
This article is a narrative and systematic review on the electromagnetic optimization literature of superconducting solenoidal magnets and coils. Superconducting solenoids are the basis of magnetic resonance imaging machines and superconducting energy storage systems. As the literature has evolved and many optimization techniques have been …
Superconducting Magnetic Energy Storage: Status and Perspective
When the short is opened, the stored energy is transferred in part or totally to a load by lowering the current of the coil via negative voltage (positive voltage charges the …
Study on field-based superconducting cable for magnetic energy storage …
In this study, the parameters are set as t = 2 μm and d = 75 μm. The radial distance for 1 turn is 0.375 mm. By finite element calculation, the inductance matrix for normal cable (all 3-SC) are: (6) M normal = 0.106 0.101 0.101 0.108 μH (7) M Field − based = 0.106 0.100 0.100 0.110 μH of which values are approaching.
Superconducting magnetic energy storage (SMES) systems
Abstract: Superconducting magnetic energy storage (SMES) is one of the few direct electric energy storage systems. Its specific energy is limited by mechanical considerations to a moderate value (10 kJ/kg), but its specific power density can be high, with excellent energy transfer efficiency. This makes SMES promising for high-power and …
Performance investigation and improvement of superconducting …
In order to improve the volume energy storage density, the rectangular cross-section electromagnetic coil is optimized in terms of structure. The critical current, volume …
Development of design for large scale conductors and coils using MgB2 for superconducting magnetic energy storage device …
In this study, the conductors and coils for the R&W and W&R SMES coil with 30 kJ stored energy were designed using commercially available multifilamentary MgB 2 strands. The design was accomplished within the permissible strains, and the demonstration by the small test coil proved the validity of the analytical designs.
Influence of AC Loss on Stress and Strain of Superconducting Coils
HTSCC in superconducting energy storage coil is subjected to thermal stress which is caused by thermal contraction due to AC loss. The thermal stress will …
Development of superconducting magnetic bearing for flywheel energy storage …
We have been developing a superconducting magnetic bearing (SMB) that has high temperature superconducting (HTS) coils and bulks for a flywheel energy storage system (FESS) that have an output capability of 300 kW and a storage capacity of 100 kW h (Nagashima et al., 2008, Hasegawa et al., 2015) [1,2]. The world largest-class FESS with …
Optimal power smoothing control for superconducting fault …
A superconducting fault current limiter-magnetic energy storage system (SFCL-MES), which uses the superconducting coil (SC) to both smooth the wind power …
Superconducting Magnetic Energy Storage (SMES) Systems
Superconducting magnetic energy storage (SMES) systems can store energy in a magnetic field created by a continuous current flowing through a superconducting magnet. Compared to other energy storage systems, SMES systems have a larger power density, fast response time, and long life cycle.
Energy Storing and Fault Current Limiting in a Unified Superconducting Magnetic …
This work describes a novel concept for unifying Superconducting Magnetic Energy Storage (SMES) and an inductive-type Fault Current Limiter (FCL). A single superconducting coil is used both as an energy source for the operation of the SMES and as the field source for saturating the magnetic cores in the FCL. A possible geometry …
Improved electromagnetic coil insulation health monitoring using equivalent …
1. Introduction Electromagnetic coils are widely used in industrial energy conversion applications such as motors, solenoids, relays, and transformers. Oak Ridge National Laboratory (ORNL) conducted a study [1] showing that of solenoid valve failures in U.S. nuclear power plants, over 50% were attributed to electromagnetic coil faults (coil …
A Sensor-Fault Tolerant Control Method of Active Magnetic Bearing in Flywheel Energy Storage …
Flywheel energy storage system is a promising technology of high power storage and energy conversion for Hybrid Electric Vehicles (HEVs) and Electric Vehicles (EVs). As the safety issue is one of the top priorities of this technology, especially when the Active Magnetic Bearing (AMB) is utilized, a sensor-fault tolerant control method of AMB is …
Degradation Monitoring of Insulation Systems Used in Low-Voltage Electromagnetic Coils …
Motor magnetic field signals can also be used to detect inter-turn shorts, wherein the motor magnetic field changes in the event of an inter-turn short fault. The classical methods include air-gap-flux-based methods [ 26, 27 ] by installing search coils inside the motor and leakage-flux-based approaches [ 28, 29 ] using an external flux sensor outside the motor.
Superconducting magnetic energy storage
Superconducting magnetic energy storage (SMES) systems store energy in the magnetic field created by the flow of direct current in a superconducting coil which has been cryogenically cooled to a temperature below its superconducting critical temperature. This use of superconducting coils to store magnetic energy was invented by M. Ferrier …
Development of design for large scale conductors and coils using MgB2 for Superconducting Magnetic Energy Storage Device …
As part of this work, we also developed and tested an active protection scheme for the coil. Such active protection schemes are of great interest for MgB2-based MRIs because they permit ...
An adaptive fault tolerant control method for electromagnetic …
The Biot-Savart law is used to calculate the magnetic field of one coil, and Ampere''s law is used to calculate the electromagnetic force of the remaining coils. The exact force model is as follows: (1) F 21 = μ 0 i 1 i 2 4 π ∮ ( ∮ r × dl 1 r 2 ) × dl 2 where μ 0 is the free space permeability constant with 4 π × 10 - 7 H / m .
Superconducting magnetic energy storage with toroidal field coils …
Strong electromagnetic force caused by high magnetic field and large coil current is a serious problem in superconducting magnetic energy storage (SMES) systems. In facing this ...
