This is the project for the integrated LLC and buck-boost converter for fuel cell electric vehicle using TMS320F2837xS MCU.
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Create low-level software for ADC, ePWM, CAN communication to operate the LLC full-brige resonant converter topology
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The ePWM module is configured in center-aligned mode, a 12-bit up/down counter is used to create the PWM period. A 100kHz PWM frequency is created to drive the power of LLC resonant converter.
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Config a high-speed CAN protocol 500kbps to communicate with other ECUs in a vehicle. ADC software was also added to provide ADC sensor value for the double-loop controller in application software.
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In the application parts, the doubled-loop controller is used to regulate the output voltage and current of the LDC converter.
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In diagnostic parts, LDC will detect the failure of over current, over/under voltage, over temperature and other error conditions to protect the converter when it works in the fault condition. The fault signals are then sent to the vehicle control unit (VCU) via the CAN bus.