This paper present the transient stability analysis of a power grid, which integrates both superconducting magnetic energy storage (SMES) and gridable vehicles (GVs). Also, vehicle-to-grid (V2G) operation is devised to control GVs charge from or discharge grid. Simulations various faults are carried out under different penetration proportions SMES V2G power. The results load angle response system voltage given illustrate that can enhance Moreover, simultaneous use further improve dynamic...

This paper proposes a new fault-tolerant linear permanent-magnet (PM) motor, termed as primary PM (FT-PPM) motor. The proposed motor offers high power density, efficiency, fault tolerance and low cost, suitable for maglev transportation applications. Both PMs windings are set at the steering device of train, while only iron stator is fixed between two rails along whole line. Meanwhile, topology incorporates concept teeth (FTT) to provide desired decoupling among phases. electromagnetic...

Simultaneous detection of dihydroxybenzene isomers including hydroquinone (HQ), catechol (CC), and resorcinol (RS) is significant for water quality control as they are highly toxic often coexist. However, it a great challenge to realize their accurate simultaneous due similarity in structure properties. Herein, an electrochemical flexible strip with single-atom cobalt (SA-Co/NG) was constructed through high-resolution electrohydrodynamic (EHD) printing isomer's detection. Results showed that...

In this paper, a new linear stator permanent magnet (PM) vernier high-temperature superconductor (HTS) machine is proposed for wave energy conversion. The adopts double-sided design and inner-translator arrangement where the consists of two plane iron cores with salient teeth wound 3-phase armature windings PMs mounted on surface teeth. While translator designed as an core sides, HTS bulks are inset between every adjacent to shield flux leakage, thus improving power density machine. Based...

This paper presents the quantitative analysis for optimal design of wireless power transmission (WPT) systems based on magnetic resonant coupling (MRC) mechanism. In this paper, exemplified MRC-based WPT system adopts series-series topology and one coil, which shows that energy efficiency transferred are both significantly affected by mutual inductance primary-resonant coils resonant-secondary coils. addition, simulated experimental results provided to illustrate influence performance...

This paper quantitatively compares three types of double-stator flux-modulation permanent-magnet (PM) machines, namely the vernier machine, machine with HTS bulks, and magnetic-geared machine. Due to adopting topology, these PM machines achieve higher energy transmission power conversion than single-stator counterparts. Also, design for proposed are respectively use pole, bulk ring modulating low speed rotating field rotor high armature windings, hence obtaining gear effect operation. It...

In this paper, the concept of dc-field excitation is newly incorporated into axial-flux doubly salient (AF-DS) machine, leading to create new magnetless AF-DSDC machine. With external field excitation, proposed machine not only can enjoy its improved torque density, but also flux-weakening capability for wide-speed range operation. these characteristics, favorable in-wheel direct drive application. particular, designed and compared based on requirement a typical passenger electric vehicle....

Seeking the efficient and green corrosion inhibitor for copper in certain conditions is an imminent problem. In this account, performance mechanism of inhibition N,N-dibenzyl dithiocarbamate acid (DBDC) on 0.5 M H2SO4 solution are investigated with a multidimension approach combining experimental theoretical methods. The results demonstrate that DBDC molecule can firmly adhere to surface form hydrophobic film, which obeys Langmuir adsorption isotherm. self-assembled monolayer (SAM) presents...

This paper presents a new flux-mnemonic dual-magnet brushless machine which incorporates both the neodymium-iron-boron (NdFeB) and aluminum-nickel-cobalt (AlNiCo) permanent magnets (PMs) for hybrid excitation. By applying temporary current pulse in small magnetizing winding to online tune magnetization of AlNiCo PMs, proposed can provide flexible air-gap flux control, thus achieving high efficiency at different speeds loads. newly using parallelogram model PM hysteresis loop then...

This paper implements the new design structure, so-called mechanical offset (MO) into double-stator multitoothed switched reluctance (DS-MSR) machine to form MO-DS-MSR machine. The major distinction of MO structure is purposely mismatch outer and inner rotor teeth with a conjugated angle. With torque components can be compensated each other, hence minimizing resultant ripple. By employing finite element analysis, characteristics performances proposed machines are analyzed compared.

A dynamic model of the ball screw drive is proposed in this article. It revealed that when axial thrust transmitted between and nut, extra torque generated synchronously which not existing models. And a physical for studying relationship proposed. lumped established, kinematic compatibility equation describing motion transmission rotary displacement established. Then preload double-nut analyzing force deformation built. An approach to analyze first resonant frequency described. Meanwhile,...

The dc-excited dual-memory machine utilizes two different kinds of permanent magnet (PM) materials for each PM pole. By employing a set separately controlled magnetizing windings, it can easily realize the pole-changing function without affecting or changing armature winding topology. In this paper, principle pole is analyzed by finite-element method. With aim preventing unexpected demagnetization low-coercivity PMs, special scheme, namely pole-protection developed to shield these PMs....

Memory machines possess the ability of memorizing magnetization level on their permanent magnets (PMs) and hence provide flexible flux-tuning without using dc field winding for continual excitation. In this paper, two kinds memory machines, namely dual-memory single-memory, are investigated pole-changing operation with emphasis new approach machine. essence, machine realizes by dropping some poles whereas single-memory one achieves reversing poles. The finite element analysis validates...

This paper proposes a combined numerical and analytical approach for magnetic vibration analysis of new dc-excited multitoothed switched reluctance (MSR) machine. First, the machine design is artfully to incorporate winding into MSR topology, hence breeding flux controllable, high-torque, low-torque ripple, doubly salient magnetless Then, finite-element-method used calculate force torque. A series equations are formulated parameters proposed The process corresponding results given verify validity

The purpose of this paper is to propose the high-performance modulation strategy, power control and current regulation schemes for a multiple-channel source converter (CSC) fed high temperature (HT) superconducting magnetic energy storage (SMES), which can in turn function as frequency stabilizer active filter distributed generation system. key design implement interleaved space vector technique suppress switching harmonics, dynamic capacitor voltage damp LC resonance well regulate grid...

The permanent magnet (PM) dual-memory machine incorporates the concept of PM memory machines and hybrid machines, hence offering flexible flux-tuning flux-mnemonic function. It employs aluminum-nickel-cobalt (Al-Ni-Co) neodymium-iron-boron (Nd-Fe-B) PMs as a group embedded in each pole to complement other. Thus, it inherently achieves merit high working temperature power density. Design principles this new class are devised discussed. Both simulation experimentation given demonstrate...

The dual-memory machine utilizes two kinds of permanent magnets (PMs), namely the aluminum-nickel-cobalt (Al-Ni-Co) and neodymium-iron-boron (Nd-Fe-B) materials, to provide effective flux-mnemonic feature. Namely, Al-Ni-Co PM can be forward or backward magnetized in such a way that it coordinate with Nd-Fe-B online tune air-gap flux density. Based on proposed DC-excited memory structure, magnet proportioning between is analysed. Both simulation experimentation are carried out verify validity design.