| Contactless Power System (CPS) is a new power supply system which is the utilization of powerelectronics, magnetic coupling technology and related control theory to make all kinds of mobileelectrical equipment through non-contact method to obtain electricity from the grid. Because of itssecure, flexible, able to work (under water, snow and ice and underground, etc.) in a variety of harshconditions and other characteristics, so CPS is widely used in the transport equipment, robotics,deep-sea oil recovery, underground mining and other fields.In CPS, since the original and secondary parts work in the loose electromagnetic coupling, it isusually designed with Soft-Switching resonant converter circuit to increase the system transmissionefficiency. In the case of the selected parameters, determines how fast calculate the CPSSoft-Switching point, the choice of output control strategy as well as specific hardware circuit EMIdesign, thermal design, and other related issues are the most concerned problems of the relevantdesigners. In this paper, this series of key issues are discussed one by one, and LCL resonantsoft-switching CPS-the most iconic CPS circuit topology is used into analysis and verification of therelevant conclusions.Specific work of this paper include: based on the typical circuit topology model CPS-LCLresonant Soft-Switching, firstly to study and verify the system Soft-Switching points using the fixedpoint analysis method, secondly to determine the duty cycle of the system control strategy based onthe primary side of the energy flow control method, and finally to analysis for the actual hardwarecircuit design, which mainly include the system EMI design and thermal design. |
PDF Full Text Request