Research On HEV Drive System Based On LabVIEW

Protecting the environment and saving energy has become the two main themes of society, hybrid electric vehicles employing internal combustion engines and electric motor as a power source is the first choice. Integrated starter/generator (ISG) hybrid electric vehicles is current internationally recognized important practical significance and direction.With the research of hybrid electric vehicle products, the most critical link is to make and optimize the control strategy based on different hybrid drive systems. How to match the engine, electric motor, battery and optimize them are a technical problems which must be resolved but still a difficult. The hybrid electric vehicle based on the physical prototype directly hybrid takes a lot of energy. Therefore, the theoretical modeling, virtual simulation and analysis for the hybrid drive control system are an important product develop work.In this paper, we study ISG mild parallel hybrid electric vehicle, based on virtual instrument technology and device, with LabVIEW software platform, we built system model and research its drive control, the detail tasks as follows:(1) Introduced the research situation of hybrid electric vehicle and analyzed the reason of choosing ISG hybrid electric vehicle as the study object.(2) Discussed and analyzed the structural characteristics, control strategy and the key technology of hybrid electric vehicles. Introduced the situation of hybrid electric vehicle simulation software at home and abroad, focus on the virtual instruments and simulation software LabVIEW, and analyzed the advantage of choosing this software to research the hybrid electric vehicle drive system.(3) Combined with the hybrid electric vehicle structure and control strategy, the main drive system components such as engine parts, electric motor and battery were selected, and the parameters of them also were considered from the car's power, economy and cost aspects comprehensively.(4) Finally, the relevant data and singal were got from bench scale test and DAQ data acquisition system based on virtual instrument, then in the LabVIEW software platform we made programs build engine, ISG motor and battery model, and compared the results, the results showed that the model and the parameter design were reasonable. Through rational selection and the design, to match of engine, motor, battery on hybrid electric vehicle well, so the power and economy of hybrid electric vehicles can be improved, low emission requirements can be meet too.