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On the basis of establishing mathematical model of induction machine, the simplifying assumption of two-dimensional plane finite element model was proposed, and Dirichlet and main boundary conditions were defined. The speed governing of induction machine was realized using back-to-back voltage-fed frequency converter. The continuous output direct voltage value of three-phase non-controlled rectifier...
The failure rate of rotor bars is high, which causes large area of broken conducting bars, shortening the lifetime of motors. Therefore, the diagnosis of broken rotor fault diagnosis is of great importance. First, the mathematical model of induction motors is presented, and the internal and external magnetic field boundary conditions are defined. Second, frequency domain analysis method is combined...
This paper describes the work principle, structure and drive system design methods for a four degrees of freedom manipulator with strong load capacity, light weight and high rotary accuracy, and carries out a finite element analysis on the key parts of the arm by the software of ANSYS. The simulation results shows that the performances of all the designed parts can meet the design requirements.
From the angle of mechanical design, this paper studies on the method of capacity increase for the main lifting system of the large scale casting crane, puts forward a specific solution. Furthermore, introduces the methods of finite element analysis and fatigue life prediction for the key components, and the method to evaluate the functional performance of the equipment according to the analysis results.
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