Research On The Electromechanical Integrated Toroidal Drive

The purpose of this dissertation is to develop a novel complex drive system: the electromechanical integrated toroidal drive which integrates drive, motor, with control. This driver has some advantages such as: compact structure, large torque, speed-control, quick response and so on. So it certainly has a promising future. Therefore, the study on the design theory and machining technology is significant. In this dissertation, the design of worm coil, the displacement analysis of stator teeth, the efficiency of the system are deeply studied, which are shown as follows:The operation principle of electromechanical integrated toroidal drive is given, and the space track function of stator and worm teeth is induced. The speed ratio and the parameter choice of this system are discussed. Under different mesh situation, the relationship between the regularity of the winding for the armature and the main parameters of the helix angle is emphatically introduced. Followed by the expression of the output torque and the analysis of the change law of the output torque along with the system parameters, the distribution of the planet wheel is given.According to the principle of the space coordinate transformation, the relationship between the displacement in the stator's local coordination system and that in the base coordination is worked out. The equations of stator teeth's potential energy, whose section energy is used by the integral element, is presented. The displacement expression of the stator's teeth is presented according to the minimum energy method. The distribution law of the stator teeth in different mesh position and the displacement change along with the system parameters are analyzed. Moreover, the displacement distribution in the section of the stator teeth is carried out. The displacement simulation of the stator teeth is performed using ANSYS software and the theoretical analysis is illustrated.The model of the system is established with Pro/E software, and the finite element analysis for this model is performed. The stress distribution of these components is presented with different mesh position. The distribution law of the stress along with the mesh position is discussed. In the view of mechanical properties, it is found that the planet's teeth are the weak component .With Lagrange state function, the mathematical model, motion equation, the energy distribution and the expression of the system efficiency are obtained. The distribution of surface magnetic potential is analyzed. With the method of disassemble magnetic induction intensity, the spatial problem is transformed into the two-dimensional problem, based on which the self-inductance, mutual-inductance and the distribution law for the angle change of the rotor are given. The voltage equation of the frequency converter under the constant torque is induced. As such, the formula of the system armature loss, the core loss and the mechanical loss are derived. The influence factor and the influence of them on the efficiency are studied.The prototypes are designed and manufactured. The processing scheme is given and the key manufacturing technique of this drive system is studied in detail. The factors which could possibly lead to errors in the manufacture is discussed and theoretically analyzed. Furthermore, a few initial solutions for the problems above mentioned are proposed as well. The experiment for the speed ratio is done which demonstrated the correctness of the drive principle.