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Dynamic modeling and analysis of a four-bar mechanism coupled with a CVT for obtaining variable input speeds

Ahmet Yildiz,Osman Kopmaz,Sevda Telli Cetin 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.3
This paper proposes a novel concept to obtain variable input speeds for a four-bar mechanism driven by an A.C. motor. In such a system,a continuously variable transmission (CVT) is proposed to use instead of an inverter-controlled motor. By this way, the speed variabilitywhich is crucial for obtaining different manufacturing and transportation processes can be provided by mechanically. Thus, moreefficient system can be achieved than classical motor controlled systems since the CVT allows electrical motor to run at its nominal pointin all conditions. For analyzing the dynamics of this new system, a theoretical model is established regarding that a half toroidal CVT isadded between the motor and the mechanism. The simulation results associated with the systems with and without a CVT are presentedby comparing to each other. The results indicate that the four-bar mechanism equipped with a CVT is feasible for the entire range ofpossible reduction ratios of the CVT.