| Summary: | 碩士 === 國立臺北科技大學 === 電機工程系 === 107 === This thesis mainly develops a bi-directional power flow buck-boost converter. The converter with energy storage pack is used as an external power supply module to enhance the integrated starter and generator (ISG) function for hybrid internal combustion engine (ICE) scooter. Hence, the module can provide short-term auxiliary power to the ICE scooter for improving the acceleration characteristics. Firstly, the measurement of the auxiliary power characteristics of the major competitor’s scooter is carried out. Then, the output voltage, output power and energy of the power supply module are determined according to the competitor’s ISG characteristics and needed specification of the hybrid ICE scooter. Moreover, the discharging characteristics including dynamic internal resistance and output voltage for the two energy storage cells, energy polymer capacitor (EPC) and Li-ion battery, are tested and characterized to determine the specifications of the energy storage module for not only meeting the requirement but also optimizing the size and price. The output voltage of the proposed external power supply module is 36V, and the proposed bidirectional converter is constructed by an H bridge converter. Output voltage of the converter operated in discharging mode is quickly increased to 60V and provide the required power for the ISG drive in the power assisted mode. When the ISG operates in generating mode, the proposed external power supply module is charging by 12V lead-acid battery under constant current (CC) mode. When the SOC of the energy storage module of the external power supply module reaches the preset value, the proposed bidirectional converter is stopped.
The proposed converter is controlled by a digital signal processor (TI TMS320F28075) to realize the required discharging and charging function to provide assisted power for hybrid ICE scooter.
|
|---|
