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Combing the advantages of high beam current density in a pseudospark-sourced electron beam and large beam cross section in a sheet electron beam, the design of a 0.2 THz extended interaction oscillator driven by a pseudospark-sourced sheet electron beam is presented in this paper. An interaction circuit with excellent design performance while at the same time being compatible with conventional manufacturing...
There are complicated coupling terms between d-axis and q-axis in the mathematical model of grid-connected voltage-source inverter (VSI) with LCL filter in synchronous reference frame. As to this, a new feedforward compensation based decoupling control strategy, which is realized by making use of the equivalence transformation principle to eliminate the interaction caused by the coupling terms gradually...
Recently, the exchange bias (EB) phenomenon in the ferromagnet/antiferromagnet (FM/AFM) bilayer and its inborn instability effect, i.e., training effect [1], have attracted much attention for its great technological importance in spintronic devices. Usually, the study of training effect is performed by continuously recording the exchange field (HE) and the coercivity (HC) after measuring an entire...
Wearable devices are worn directly on man and one of the most important attribute for wearable devices is “user experience” friendly[1]. Wearable device is small in size, it is difficult to carry large capacity battery. the short duration of the battery and charging difficulties and other issues has become a universal response of all users, which seriously affect the user experience. Wireless energy...
In recent decades, permanent magnet synchronous motor (PMSM) drives have become more widely used for electric vehicles (EVs) due to simple structure, high efficiency and high power density. But the drawback with constant PM flux linkage also brings limitations in the drive application. Two ways can be used to solve the above-mentioned problem, one is that the armature current is utilized to weaken...
In this paper, we study the enhancement of far-field emission of dipole caused by the interaction between a single dipole and a silver grating. When the dipole is placed nearby an Ag grating, the surface plasmons coupling plays a crucial role in this enhancement process. The results show that the effect of enhancement differs as the dipole's direction and the duty cycle of grating are changed. We...
We study the contribution of Surface-plasmons (SPs) coupling with a single dipole to enhance the emitter emission. When the Ag film is inserted into GaN, the emission efficiency of single dipole in GaN can be enhanced greatly. With 3D-FDTD method, the numerical simulation results demonstrate that the SPs play a key role in enhancement light emitter efficiency. Furthermore, by changing the parameters...
The problem of solder joint fatigue is essentially one of fatigue crack growth. However, little work has been done that enables fatigue life predictions by means of tracking the crack front and its growth. Most popular fatigue life models are empirical and therefore, limited in their applicability and in the insight they provide. Analytical fracture mechanics approaches such as the Paris Law and the...
The problem of solder joint fatigue is essentially one of fatigue crack growth. However, little work has been done that enables fatigue life predictions by means of tracking the crack front and its growth. Most popular fatigue life models are empirical and therefore, limited in their applicability and in the insight they provide. Analytical fracture mechanics approaches such as the Paris law and the...
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