Research And Design Of The Maximum Power Tracking And Real-time Monitoring System For Commercial Vehicles

In recent years,research on exhaust heat and heat transfer technology of automotive exhaust has rapidly increased in the world.Combining traditional power cars with commercial vehicle thermoelectric power generation systems to achieve energy conservation and emission reduction is an international frontier,which has important theoretical significance and application value.However,there are some problems in the existing thermoelectric power generation system: the maximum power output of the thermoelectric power generation device has low tracking accuracy and slow speed,and in particular,the vehicle-mounted monitoring system has problems of data transmission,poor stability of large-capacity storage,and low storage efficiency.This paper takes the commercial vehicle exhaust gas power generation system as the research object,focusing on the research of the maximum power output of the exhaust gas power generation device as well as the improvement of key issues related to the on-board monitoring system,including the following contents:A thermoelectric power generation system for commercial vehicles is constructed.The thermoelectric power generation principle,thermoelectric power generation materials and thermoelectric power generation modules are briefly introduced,and the series-parallel electrical topology is optimized to achieve high-efficiency power generation.Maximum power tracking of thermoelectric generators is achieved by controlling DC/DC.In order to better monitor the real-time status of the vehicle tail gas waste heat power generation system,based on the demand analysis,the vehicle tail gas waste heat power generation stand upper computer monitoring system is realized.Maximum power tracking of thermoelectric generators is achieved by controlling DC/DC.In order to better monitor the real-time status of the vehicle exhaust heat power generation system,based on the demand analysis,the vehicle exhaust heat power generation stand upper computer monitoring system was realized.Research on maximum power tracking modeling and tracking control algorithms for thermalelectric power generation.The main curve algorithm was used to model the thermoelectric output power and voltage data and function fitting.A new MPPT modelling and optimization algorithm based on the bifurcation method was proposed.The method was composed of perturbation observation method and dichotomy method.It can quickly and accurately find the maximum power point and stabilize the output of the thermoelectric generator to improve the power generation efficiency.Experimental results show that the use of binary perturbation method has greatly improved the tracking accuracy and speed compared with the traditional algorithm.Design of CAN communication monitoring software system.The functional requirements and design goals of the monitoring software are introduced,and the basic framework of the software is designed according to the functional requirements.For the choice of communication method and database management system,the CAN communication protocol and the embedded SQLite database management system are used to implement communication and storage.Then the design methods of the monitoring software communication module,data management module,and interface display module are described.Test and analysis.Based on the built-up vehicle thermoelectric power generation system,the performance of the thermoelectric power generation system was tested under the highway conditions.The test results show that the thermoelectric device of the vehicle-mounted thermoelectric power generation system under cruising conditions is small in difference and has good stability,and is in contrast with the conventional interference observation method.In comparison,the MPPT algorithm using the bi-perturbation method has greatly improved the tracking accuracy and speed compared to the traditional algorithm.