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In this study, the axial compressive performance of recycled concrete-filled corroded steel tubular columns was assessed with different concrete strength grades (C30, C45, C60) and different corrosion degrees (0%, 5%, 10%, 15%, 20%). Axial compression tests on 15 specimens were conducted, and the corresponding load-displacement curves, skeleton curves, stiffness degradation curves, characteristic...
This paper presents a study on static 3D finite element method (FEM) coupled-circuit model of a 3Kw claw-pole alternator. To derive the Optimal rotor structure, Magneto static 3D FEM used to define representation of the airgap flux density and phase inductance including magnetic saturation effect and leakage flux. Coupled-circuit model is alternator/rectifier system which based circuit analysis program...
This paper intends to verify, through actual fabrication and test, that 3D printing technology, which is one of the top 10 most promising future technologies, can be grafted onto motor industry. A complicated rotor geometry of SynRM, a non-rare earth motor, was designed and fabricated, using 3D printing technology. This paper tried to test the validity of its research by FEM analysis and load test...
This paper includes an investigation of the starting capability of a high efficiency synchronous reluctance motor for direct on-line industrial applications. The approach is to design and optimal of multi-barriers inside rotor to achieve the starting properties of an line start synchronous reluctance motor (LS-SynRM) and the steady-state performance. Using an equivalent circuit on the basis of symmetric...
We present a short-range experimental orbital-angular-momentum (OAM) multiplexing millimeter-wave communication system using patch antenna arrays. The dependence of the evolution of OAM beams on the number of array elements and array radius are analyzed. We also find phase delay deviation of 30 degrees leads to mode purity degrading to ∼1% and power deviation of 6 dB reduces the purity by <40%...
In these days, importance of motor increase, As increasing of importance, there are many studies on increasing accuracy of controlling motor. Torque ripple is disturbance of torque control. There are many ways to reduce torque ripple and Skew analysis is widely used. This paper shows how to modeling Skew rotor and torque result of skew rotor.
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