VII Международная студенческая научная конференция Студенческий научный форум - 2015

The asynchronous engine with a short-circuited rotor was designed in this work. The engine has 160 mm height of an axis of rotation. Sheets of electrotechnical steel brand 2013 are punched into the core of the stator. Thickness of sheets is 0.5 mm. Grooves are trapezium semi-closed with the laid one-two-layer concentric winding. The rotor core is also laminated. It is punched from the sheets of electrotechnical steel brand 2013. Thickness of sheets is 0.5 mm. The rotor has semi-closed grooves, with the filled aluminum winding. The core of the rotor is pressed directly on a shaft.

The designed engine meets the requirements of the specification and requirements of GOST. Necessary power indicators (cos, efficiency) and starting properties are received (frequency rate of the starting moment is1.74, overloading capacitance is 2.69).

In the paper electromagnetic, thermal, ventilating, mechanical calculations were made. According to the calculations heating of the engine parts is within the limits of the permissible norms, the fan provides the required air flow rate and the engine shaft meets the requirements of rigidity and durability.

At the first stage of the research the engine was designed in "Ansoft RMxprt" and some characteristics were obtained. Also a comparative table of the results of I.P. Kopylov's calculation technique and "Ansoft RMxprt" is given in the system description. Having a look at this table we can make the conclusion on the minimal divergence of parameters and the possibility of this software application for design.

At the second stage field calculation of the model created in "Ansoft RMxprt" by means of "Ansoft Maxwell" was made. As the model is symmetric there’s no need in creating a full model of the asynchronous engine, therefore 1/6 part of the engine was built. It is also necessary for the reduction of calculation time. The patterns of a magnetic field are received in various modes (start-up, dispersal, nominal mode). Using magnetic field patterns it is possible to observe changes in the current density in cores and changes in the induction in the course of asynchronous engine dispersal.

Thus the software package Ansoft is a very effective and convenient means of design, analysis and modeling of electrical machines. Thanks to its speed and calculation accuracy it can compete with standard design techniques.

In the technological part of the project the process of the mechanized laying of the stator winding of asynchronous engines was considered.

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