Effect on load sharing characteristics of torque coupling gear set based on internal and external excitation
ZHANG Shuo, HU Ming hui, DUAN Xu ming
(The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China)


Abstract: Aiming at the problem of uneven load in the multi motor gear coupling system, a dynamic model of the electromechanical coupling system was established based on Matlab/Simulink software, in which the gear transmission system was built by using lumped parameter method and the motor was controlled by direct torque control (DTC). The generation mechanism of time varying meshing stiffness and the principle of speed control in DTC were analyzed，and the load sharing behavior of torque couple gear transmission system was analyzed with the time varying meshing stiffness as the internal excitation and the output speed fluctuation of the motor as the external excitation of the gear coupling system. The results indicate that the time varying meshing stiffness will exacerbate the uneven load of the system. By reducing the speed fluctuation amplitude of the motor, it will be able to improve the load sharing performance of the system.
Key words: load sharing characteristics; speed ripples; torque couple; multi motor