비주얼 베이직과 Winding Function 理論을 利用한 電動機 特性 解析 프로그램 開發

Abstract

The induction machine is the most widely used machine in industry and consume much power because its structure and manufacture are very simple and maintenance fee is low. Three-phase induction motors are the most important ones and are most widely used in industry. Also, Flux Switching Motor(FSM) has advantages such as simple control circuits, simple structure, high efficiency, low production cost. But it also has disadvantage such as noise. With the development of power electronics technology, the induction motor and FSM draws researchers' attention. In this paper, development of characteristic analysis program of motors, such as induction motor and flux switching motor(FSM) by using Visual Basic and winding function theory(WFT) was described. WFT considers a torque harmonic in the air gap and the calculation time could be very short than any other analysis method. The fault characteristics of induction motor with rotor bar fault and static eccentricity was analyzed. From the simulation results, it is known that the specific frequency was changed by fault conditions. In the case of rotor bar fault the parasitic component was generated around the fundamental frequency, the magnitude of low side band was increased about 11[dB] in the case of the static eccentricity. The new revised FSM was proposed to minimize the torque ripple. The simulation results were compared with those from FEA. From the comparison it was shown that the analysis method of two FSMs by WFT was validated. The driving system were manufactured also. It was shown that torque characteristic was similar with that of experiment. The analysis program was developed by using Visual Basic. The overall format is like that each analysis source code of motor could be open separately and the analysis results and 2D cut view of motors could be identified simultaneously. From the above results, it was shown that the proposed analysis program by WFT and Visual Basic has advantages such as short of analysis time, the rough design of electric machinery rapidly.