A novel axial field flux-switching permanent magnet (AFFSPM) machine with a doubly-salient structure is presented as wind power generator. One rotor sandwiched between two stators in which both windings and magnets are placed. This generator suitable for the generation system because of its shorter length higher density. three-phase 12/10-pole 0.6 kW AFFSPM designed. The power-size equation deduced, size determined. Based on 3-D finite element method, electromagnetic performances...

A low cost single-balanced mixer is designed using a newly 90/spl deg/ substrate integrated waveguide (SIW) 3-dB coupler, which takes the advantages of cost, profile, and high performance. An X-band SIW fabricated with standard printed circuit board process. Measured conversion loss 6.8dB wide-band response from 8.5 to 12GHz are presented.

A planar integrated multi-way broadband SIW power divider is proposed. It can be combined by the fundamental modules of T-type or Y-type two-way dividers and an bend directly. sixteen way prototype was designed, fabricated measured. The whole structure made various metallic-vias on same substrate. Hence, it easily conveniently into microwave millimeter-wave circuits for mass production with low cost small size.

A rotor structure of Permanent Magnet (PM)-assisted synchronous Reluctance Machine (PMa-synRM) with ferrite PM is presented in this paper, which the irreversible demagnetization and torque ripple are reduced. The bypass rib proposed added to flux barrier rotor. path for demagnetizing field armature windings provided can also be reduced by rib. Based on 2-D finite-element analysis (FEA), location dimensions investigated improved. PMa-synRM designed compared that using a conventional...

Monitoring the condition of a dc-link capacitor is important for reliability-critical voltage source inverter (VSI) systems. With ever increasing application metalized poly propylene film (MPPF) capacitor, new challenge monitoring (CM) presented due to very small equivalent series resistance and capacitance end-of-life criterion (typically 2%-5%) an MPPF capacitor. To improve accuracy estimation, novel quasi-online CM method proposed in this paper, which introduces LC resonance intentionally...

A dual-rotor axial field flux-switching permanent magnet (DRAFFSPM) machine is proposed. 3-phase 12/10-pole DRAFFSPM designed. The topology and operation principle of the are described in detail. power equation deduced dimensions determined. electromagnetic characteristics including air-gap distribution, PM flux-linkage, back-EMF, cogging torque, investigated based on 3-D finite element (FE) analysis. influences rotor pole width stator slot chamfer back-EMF torque investigated. It shows that...

We report on a study of superhydrophobic surfaces submerged in water fluidic chamber. A surface-treated transmission grating was used as layer that had well-defined diffraction pattern when laser beam passed through the water-submerged sample, indicating Cassie−Baxter state with trapped air between and interfaces. By appling pressure to chamber, can be changed because volume reduction or penetration into grating. Depending maximum value applied change either reversible irreversible after...

A novel axial field flux-switching permanent magnet (AFFSPM) machine with a doubly-salient structure is developed as wind power generator. The electromagnetic characteristics of 0.6 kW, 3-phase 12/10-pole AFFSPM machine, including the air-gap flux density distribution, open-circuit linkage, EMF, and winding inductances, etc., are investigated based on 3-D finite element (FE) analysis. prototype built to test under both load conditions. theoretical analysis validated experimentally. It shows...

This paper presents a 3-D magnetic equivalent circuit (MEC) network that integrates the hysteresis model for analysis of axial field flux-switching (AFFS) memory (AFFSM) machine. Similar to finite element method, meshing is used subdivide into smaller domains called elements, over which set equations and reluctance equation are built. Newton-Raphson method adopted handle nonlinear problems. The fixed-point technique introduced cope with problem involving hysteresis. proposed capable...

A failure of insulation is one the main reasons for electric machine outage. Online condition monitoring (CM) an incipient degradation turn could eliminate potential fault at early stage, which attractive but challenging. To improve sensitivity and availability CM, a noninvasive technique presented in this article inverter-fed utilizing existing high-frequency (HF) switching oscillations during pulsewidth modulation operation. First, tail component sensitive to selected among dominant...

Online condition monitoring of winding insulation has been proved to be an effective means improve the reliability inverter-fed machine, but little work done on line-end coil subjected much higher transient voltage stress with a risk premature break down. In this article, inverter self-excited high-frequency switching oscillations are utilized for monitoring. To sensitivity and its robustness dynamic operating conditions, oscillation mode decomposition method is proposed. First,...

Inverter-fed machines are widely used in many important industrial applications. However, the machine stator groundwall and/or turn insulation prone to failure suffering inverter's high <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">dv/dt.</i> It is necessary identify them as early possible but challenging due their coupled and weak symptoms. In this article, a hybrid physics-based data-driven approach proposed monitor degradations. First,...

Broadband filters are constantly requirement in wideband transceivers which often cover a whole microwave band. Traditionally, have been implemented as passive networks of waveguide, coplanar microstrip, etc. More recently, also realized substrate integrated waveguide (SIW) technology. Compared to microstrip circuits, the SIW components many advantages, such high Q-factor and low radiation losses. Additionally, they smaller than corresponding conventional rectangular components. An...

Axial field flux-switching permanent magnet machine (AFFSPMM) has significant advantages, such as the short axial size and high torque density. It is suitable for direct drive in-wheel applications electric hybrid vehicles. For improving reliability, a novel fault-tolerant structure applied in AFFSPMM. The stator composed of E-shaped laminated segments. phase windings are physically isolated to each other by middle teeth cores. wounded around used regulate air-gap flux proposed machine....

Complex systems often consist of multiple units that are required to work together in parallel satisfy a specific engineering objective. As an example, manufacturing processes, several identical machines may need operate simultaneously fabricate the same products order meet high production demand. This configuration is designed with some level redundancy compensate for unexpected events. In this way, when only small portion fail due either machine downtime or scheduled maintenance, remaining...

The Weibei Uplift which is located in the transition zone between an active belt (the Qinling Orogenic Belt) and a stable block Ordos Block), unique important structural position. Understanding of timing processes uplift great significance for research on basin-mountain relationships, basin dynamic evolution, hydrocarbon accumulation. In this study, apatite fission-track analysis, zircon fission-track, geothermal simulation were used to study low-temperature thermochronology Uplift. results...