Research On ISAD System Of Hybrid Vehicles

To solve the severe energy crisis and environment pollution problem faced byautomotive industry， new energy vehicle is an effective choice. Since different forms ofnew energy vehicles have been extensively studied all over the world， hybrid vehicleswhich combine the advantages of traditional internal combustion engine vehicles and pureelectric vehicles.Taking into account the hybrid vehicles with low fuel consumption， low emissions，and longer driving range， is considered to have good prospects for industrialization. ISAD(Integrated Starter Alternator Damper) hybrid technology is a new technology used inhybrid vehicle architecture to implement energy saving in recent years.The hybrid devicebased on ISAD technology， consisting of engine， motor， batteryand controller is designed in this paper. The motor and engine crankshaft are rigidlyconnected directly to integrate into power equipment， replacing the traditional starter，generator and flywheel. The motor is not only used to start and provide auxiliary power tothe engine， but also to charge the battery.Firstly， by studying the working principles of ISAD hybrid device，the powerequipment coupled integrating with engine and motor is developed. And the parameters ofengine， motor， and battery are calculated and matched. The control strategy iscoordinated to adapt different working conditions and operate efficient. According to theresults， the engine model is selected as four-stroke gasoline engine with JL368Q326KW，and the motor is chosen as disc10KW PMSM (Permanent Magnet Synchronous Motor).Secondly， the coordinated control strategy is developed for variety of operatingmodes， including start mode， engine alone drive mode， hybrid driving mode， enginedrive and generating mode， regenerative braking mode. The strategy is applied to enablethe integration of mechanical and electrical hybrid device running efficiently.Thirdly， the ISAD hybrid device model， including engine model， ISAD PMSMmodel and controller model， is built by Matlab/Simulink and GT-power with approach oftheoretical modeling. The co-simulation model of system is set up to verify the energy management strategy and efficiency of the device.Finally， based on the matching scheme and simulation results of ISAD hybrid device，a disc PMSM is designed and manufactured to match the system. Then the hybrid systembench is constructed to test and verify the performance of hybrid device.