No abstract

Owing to limited computational resources and the very large difference between electrical and thermal time constants, simulation for resonantly operated DC-DC converters using physical or ideal switching model is very time-consuming or impossible. In this contribution, a novel thermal-electrical averaging model of resonantly operated DC-DC converters is proposed to reduce the computational burden and time consumption. The thermal-electrical model is based on extended describing function method. All required parameters for the thermal model can be obtained from the datasheets or on the website. The thermal-electrical models are applied in series-parallel resonant converters with LC-type and C-type output filters as examples, and verified by comparison with two standard simulation tools. The thermal-electrical modelling procedure proposed in this contribution can of course also be applied for other types of resonant converters, such as series resonant converter, parallel resonant converter and multi-phase resonant converter.

No abstract

With the widespread use of heavy-duty engineering vehicles, the need of display terminal for the vehicle increases rapidly. Because of the special functional requirements, it is very difficult to design the display terminal for developers. At the same time, the cost of designing display terminal is very expensive. It is significant that the customizable display terminal can be rapidly designed. In this paper, a method of CAN bus display terminal design for heavy-duty engineering vehicle is presented. Embedded rapid customized technology is employed in the design process. Also the custom embedded development platform and the application software for the display terminal were designed. The embedded development platform includes hardware components such as CAN bus interface, PowerPC processor and CoDeSys programming environment. Based on the platform, the application software is designed to transmit data on CAN bus and record the running state of vehicle. The developed program is used for the purpose of real-time state parameters transmission and storage, dynamic graphical display, modification of the interactive system. The application practice result shows that rapid customization design technology is valid for heavy-duty engineer vehicle design application, and improvement for the design of embedded display terminal is discussed based on the effect of practical application.