Design and Finite Element Analysis of Electrical Plug Box Based on the Modular Mechanism

In this paper, the design of electrical plug box is discussed according the modular concept, its structure is analysed. The plug box is devisde, which is one module of a cabinet, using Solid Words. The cabinet is composed of bus board, modular power supply unit (MPSU), variable frequency speed regulation micro controller unit (HVF-MCU), data collection of analog input(DCAI), analog output plug-in (AO), digital input plug-in (DI), digital output plug-in (DO) and human machine interface (HMI) and some standard parts assembled. The deformation of a plug-in box is analysised at different frequency and stress by ANSYS, pointing out the main factors of the deformation, improving the structure. The deformation is obviously reduced according to the results of analysis after the structure is improved.