A methodology to calculate the meshing tooth of giant magnetostrictive harmonic motor is proposed in this paper. The deformation curve of the flex spline of the giant magnetostrictive harmonic motor was investigated with Fourier function. A kinematic model of harmonic drive was established when the involute profile is selected as the flexible gear tooth shape and the circular spline is obtained following the envelope theory, thereby generating the kinematic simulation as well as the trajectory of the circular spline teeth with respect to the flex spline. Finally, the relationship between the cone angle of flex spline and the engagement profile is discussed; together with an improvement strategy-equal width shrinkage of circular spline.
This paper mainly discusses the tower models in lightning overvoltage calculation, especially analysis the lossless and lossy models. Build the muti-wave impedance model of the most commonly used towers, which are portal tower, glass tower, cat head tower and strain tower in accordance with the reality. The simulation shows that muti-wave impedance model has a higher lightning overvoltage than simple model under the same condition. This is because the simple model ignores the influence of resistance and inductance, so the more accurate the model is, the more effective the protection will be.
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