Modeling and Transmission Characteristics Analysis of Dual- Mechanical-Port Magnet-Geared Machine Using Control Block Diagrams

The dual-mechanical-port magnet-geared machine (DMPMGM) has gained great research interest due to the development of the electronically controlled continuously variable transmission (E-CVT) in hybrid electric vehicles. The analysis for transmission characteristics, including torque and speed relationships between input and output ports, plays a crucial fundamental role in extending control applications. This study aims to propose a simple and intuitive approach to analyze the DMPMGM from the view of control engineering. Both the kinematic and dynamic characteristics are represented with the block diagram descriptions. The concepts of feedforward and feedback loops are employed to illustrate the transmission interactions between DMPMGM rotors. The modeling method in this study conveniently integrates into an E-CVT control system. The feasibility of the proposed approach is verified by the corresponding simulation results with the finite element analysis-based method.