Research And Development Of EREV Extended Range Controller

Due to the country’s strict control of energy and emissions,the new energy vehicles have been developed rapidly,and all kinds of new energy technologies have been widely used.Due to the advantages of zero emission and non-pollution,pure electric vehicles have been paid much attention to.However,due to their limited mileage,low energy density and high cost,it is difficult to be popularized in a short period of time.With the addition of auxiliary power unit,increasing the electric vehicle can effectively solve the problems of high cost and low power of the pure electric vehicle,extended-range electric vehicles can effectively solve the problems of high cost and low power of pure electric vehicles.However,the dynamic performance of the whole vehicle depends largely on the control logic of the range controller.Therefore,the development of range controller is becoming more and more important in the design of extended-range electric vehicles.In this paper,a conventional diesel locomotive is reformed with the power system of EREV.According to the control requirements of the vehicle,the vehicle powertrain system such as engine,generator and drive motor are matched.After the matching of the dynamic parameters,the hardware design of the controller is realized,which includes two parts: the principle design and the PCB board design.The hardware design is combined with the Altium Designer software to design the circuit diagram of the power supply,the switch and analog data acquisition,the power switch,the CAN communication and so on,and then design the schematic diagram of the PCB board to make the PCB hardware.In the software design,the Simulink module is used to design the simulation model of the MATLAB,such as the power on line test,waiting,the start of the extended range,the running,the fault processing,the dead cycle and so on.The use of PM+ and PTW to generate hex files can be burned to complete the development of the controller,and bench test.The test result shows that the controller of the range controller can communicate with the Vehicle Control Unit in real time and control feedback on the auxiliary power unit.The designed controller has met the requirements of the whole vehicle design and has been applied in practice.