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A conceptual cryogenic system for a 10 MW superconducting wind generator (SWG) is proposed. The proposed configuration eliminates the cryogenic rotary joints for transmitting the coolant, by which the reliability of the cryogenic system is improved. The design considerations and characteristic analysis under different conditions are conducted. The characteristic analysis provides a base for practical...
HTS materials have potential applications in building HTS linear generators (HTSLG) which generate substantial advantages over conventional ones. A HTS linear synchronous generator (HTSLSGs) with HTS coils as a direct-drive wave energy converter (DWEC) is proposed and designed. The characteristics, structures, advantages of the HTSLSGs with HTS coils are analyzed and presented.
Wind power production as an important renewable energy form has been developed substantially in recent decades. According to the increase in population density along with lack of land for installation onshore wind turbines, it leads to build wind farms with larger power production and more and more offshore wind farms developed. Therefore, having a few large-scale wind turbine generators (WTGs) instead...
A measurement instrument used for evaluating the superconducting properties of high temperature superconductors is proposed. Due to its special design, it can readily measure the properties with user-friend operation. Its flexible structure can also be adapted to different parameters measurement only by modifying the input initial parameters.
A HTS linear synchronous generator (HTSLSG) as a direct-drive wave energy converter (DWEC) has been proposed and designed, including structure design and operation mode. Advantages of the DWEC system using HTSLSG have also been verified.
In this paper, a step-shaped field coil for large capacity superconducting motors application is investigated. As compared to a conventional rectangular cross-sectional shaped field coil, the step-shaped one can obtain the same air gap magnetic field intensity at a target point located at symmetry axis of field coil with reduced HTS tape consumption, and it also improves the critical current significantly...
In this paper, a novel arrangement of field coil is proposed to decrease the additional iron loss caused by magnetic flux sag between the adjacent field coil sides with the same current direction. The comparison of iron loss between the novel and traditional arrangement of field coils at different conditions are discussed. The novel arrangement can decrease the iron loss from the analytic results.
Cryogenic operation of power electronics provides many promising benefits for power conversions compared to their ambient-temperature counterparts. This paper presents a cryogenic boost-buck chopper integrated with cryogenic MOSFETs and high temperature superconducting (HTS) inductor. The results obtained show that the proposed boost-buck chopper has much higher operational efficiency than the conventional...
An inductive coupled power transfer (ICPT) scheme using high temperature superconducting (HTS) primary is presented, with its resonant current, transfer power and transfer efficiency characteristics calculated and discussed to identify this promising method to suit to develop practical low-frequency high-current ICPT devices and systems.
High temperature superconducting (HTS) transformer is favored to reduce the energy loss by replacing normal conductor windings with superconducting windings. In order to reduce perpendicular field component around the HTS windings, the air gaps insider the windings are optimized and discussed to suit practical HTS transformer development.
Based on the diode-based bridge type superconducting fault current limiters (SFCL) and the SCR-based bridge type SFCLs, a fully controlled hybrid bridge type SFCL without bias power supply and using fast-response power electronic switches IGBT is presented. By controlling the IGBTs, the current limiter circuit will have different state to limit fault currents. Compared to the traditional bridge type...
High temperature superconducting (HTS) DC cable shows wide application prospect in the field of power transmissions. Compared with the conventional cables, a HTS cable shows no Joule heating during operation. Moreover, a DC superconducting power transmission system is more efficient contrast to an AC one, because it is free from AC loss. In near future, high current-carrying capacity and long distance...
The method of underwater active electrolocation is a new method for underwater terminal navigation and locating. In our experiments, the Detect Frequency Dead Zone (DFDZ) and the Frequency Inflection Point (FIP) of the amplitude information-frequency characteristics (AIFC) of the electrolocation system was found. In order to explain those AIFC phenomena. In this paper, based on an ideal electromagnetic...
In order to reduce the cogging torque of the permanent magnet motor (PMM), increase the permanent magnet's air-gap magnetic density and improve the air-gap magnetic field distribution. In this paper, segmented Halbach array magnetization is used to obtain the ideal one-sided magnetic field. The paper models the finite element analysis for machine and calculates the distribution of the magnetic field...
IoT (Internet of things) is such a key trend that it is quickly becoming one of the most influential research. Remote control plug introduced in this article is a tiny IoT product which connect plug with mobile phone. With home appliances plugged in smart plug, people can control appliances anytime anywhere. This paper introduces a overall design of remote control plug, including power supply module,...
This paper presents an exact analytical method to computer the air-gap magnetic field of SPM motors for being evaluated slotting effects accurately. The Laplace equations or Poisson equations of the sub-domains are contacted by boundary conditions, and then solved by exact analytical method. The actual height of slot and distance between slots are taken into account in the computation. Magnetic field...
The exploitation and utilization of solar energy has been paied more attention because of large reserves, economic, cleanliness and so on as a new kind of energy. Photovoltaic power system is a kind of new power generation system which makes use of the photovoltaic effect of the semiconductor materials of the solar cell and converts solar radiation into electricity. This design presents a photovoltaic...
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