ASIL D safety concept-assessed high-speed traction: bi-directional DC/DC conversion reference design
Description
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 FETSoftware based resolver to digital conversion (RDC) supporting motor run at high speedIntegrated control of traction inverter and DCDC converter using single TMS320F28388DTÜV SÜD assessed ASIL D functional safety concept based on ASIL decompositionPeak current mode control (PCMC) with no external support circuitry for PCMC function with synchronous rectification (SR) switching scheme
Applications
- Traction inverter-high voltage
- Traction inverter-low voltage
- Starter & generator
- 3-phase AC-digital control
- Unidirectional HV-to-LV digital loop
- Bidirectional 400-V & 800-V to LV
Product Categories
- C2000 real-time microcontrollers