This reference design demonstrates control of HEV/EV traction inverter and bi-directional DC-DC converter by a single TMS320F28388D real-time C2000™ MCU. The traction control uses a software-based resolver to digital converter (RDC) driving the motor to a high speed up to 20,000 RPM. The DC-DC converter uses peak current mode control (PCMC) technique with phase-shifted full-bridge (PSFB) topology and synchronous rectification (SR) scheme. The traction inverter stage uses silicon carbide (SiC) power stage, driven by UCC5870-Q1 smart gate driver. PCMC waveform is generated using state-of-the-art PWM module and built-in slope compensation in the comparator sub-system (CMPSS). An ASIL decomposition based functional safety concept for the system has been assessed with TÜV SÜD to demonstrate system level safety integrity level up to ISO 26262 ASIL D for representative safety goals.
Features
- EV traction inverter with SiC power stage running at high speed (up to 20,000 RPM)
- Bi-directional HV-LV phase-shifted full bridge (PSFB) DC-DC converter with SiC primary FET
- Software based resolver to digital conversion (RDC) supporting motor run at high speed
- Integrated control of traction inverter and DCDC converter using single TMS320F28388D
- TÜV SÜD assessed ASIL D functional safety concept based on ASIL decomposition
- Peak current mode control (PCMC) with no external support circuitry for PCMC function with synchronous rectification (SR) switching scheme
- Design port to AM263 is available, see application note below