SPRAD58A September   2022  – February 2023 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1 , UCC14130-Q1 , UCC14131-Q1 , UCC14140-Q1 , UCC14141-Q1 , UCC14240-Q1 , UCC14241-Q1 , UCC14340-Q1 , UCC14341-Q1 , UCC15240-Q1 , UCC15241-Q1 , UCC5870-Q1 , UCC5871-Q1 , UCC5880-Q1

 

  1.   Abstract
  2. Introduction
  3. Architectures and Trends
  4. Key Technology to Enable Traction Inverters
  5. Microcontroller
    1. 4.1 Sitara Family
    2. 4.2 C2000 Family
  6. Isolated Gate Drivers
  7. Low-Voltage Bias Supplies
  8. High-Voltage Bias, Redundant Supply
  9. DC Link Active Discharge
  10. Motor Position Sensing
  11. 10Isolated Voltage and Current Sensing
  12. 11System Engineering and Reference Designs
  13. 12Conclusion
  14. 13References

C2000 Family

The TI C2000 MCU family has been delivering the leading real-time control performance in digital power and motor control applications for more than 2 decades. These MCUs integrate flash memory, an Analog-to-Digital Converter (ADC), a Digital Signal Processor (DSP), and Pulse Width Modulation (PWM) units and are very successful; such as the TMS320F28003x and TMS320F2837x. The C2000 family features range from standalone inverters up to full powertrain integration including: Traction Inverter, Onboard Charger (OBC), High Voltage DC-DC Converter, Battery Management System (BMS), Heating Ventilation, and Air Conditioning (HVAC), with the upcoming F29x family capable of delivering hundreds of Millions Instructions Per Second (MIPS).

TI C2000 MCUs include the following features to help accelerate control algorithms for traction inverters:

  • A state machine-based 32-bit floating-point control law accelerator capable of independent code execution from the main DSP core field-oriented control
  • Support for 32-bit floating point operations or 64-bit floating point on some devices in this family
  • A trigonometric math unit (TMU) that provides intrinsic instructions to support common trigonometric math functions common in transforms and torque loop calculations. Significant cycle count reductions are possible using the TMU-based instructions. #FIG_IFD_DDZ_N5B shows the improvement through TMU for the traction inverter control algorithm.
  • Reduced cycle count for both Viterbi and cyclic redundancy check operations found in complex math equations
Figure 4-2 TMU Improvement for Traction Inverter Control