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In the eddy current brakes, the magnetic field can be produced by excitation winding systems or by permanent magnets. According to the difference of flux sources, the eddy current brakes could be divided into three types: the electric excitation eddy current brakes, the permanent magnet eddy current brakes and the hybrid excitation eddy current brakes [1]-[2]. The hybrid excitation eddy current brakes...
Permanent magnet synchronous motors (PMSMs) with salient rotor structure are attractive in the applications where high power density and high efficiency is of importance[1]. However, with the increasing of power density and rotating speed, acoustic noise and vibration problem [2] caused by electromagnetic (E.M.) force wave is very serious. But, the existing literatures [3-4] mainly research the non-salient...
This paper proposes a dual Halbach array to improve the thrust force of tubular linear machines. The force output of a single phase permanent magnet tubular linear motor (PMTLM) is obtained analytically. It is validated with finite element method (FEM). Based on the analytical force model, penalty method and scanning method are employed to conduct parameter optimization to maximize the force output...
In this paper, a recently developed high resolution electron diffraction technique is employed to characterize the grain orientation and grain boundaries for 45 nm node Cu interconnects with SiCN capping. The results are applied to evaluate the grain structure effect on electromigration (EM) reliability. We first calculate the flux divergence for void formation using interfacial and grain boundary...
Theoretical studies and experiment analysis of time-domain symmetrical configuration two-probe method are provided in this paper, and the method's feasibility and error separation's precision are discussed. Conclusions can be drawn from the results of simulation and experiment that measurement precision and repeat precision of two-probe method is a little higher that of single-probe method. Though...
Previously proposed singularity function models are suitable only for representing real data. However, in a number of application domains such as magnetic resonance imaging, the initial raw data are complex images, which requires new image models for representing them. In this paper, a novel singularity function analysis model is proposed that represents a complex discrete signal or image as a linear...
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