TIDUF31B May   2023  – September 2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 MSPM0G1507
      2. 2.3.2 UCC28881
      3. 2.3.3 UCC27712
      4. 2.3.4 TLV9064
      5. 2.3.5 TPS54202
  9. 3System Design Theory
    1. 3.1  High-Voltage Buck Auxiliary Power Supply
    2. 3.2  DC Bus Voltage Sensing
    3. 3.3  Motor Drive Stage
    4. 3.4  Bypass Capacitors
    5. 3.5  Phase Current Sensing With Two or Three Shunt Resistors
    6. 3.6  Phase Current Sensing With a Single Shunt Resistor
    7. 3.7  Hall-Effect Sensor or QEI Interface for Sensored Motor Control
    8. 3.8  DAC for Software Debug
    9. 3.9  Overcurrent Protection
    10. 3.10 Overtemperature Protection
    11. 3.11 Isolated UART port
    12. 3.12 Inverter Peak Power Capability
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
      1. 4.1.1 Hardware Board Overview
      2. 4.1.2 Test Equipment for Board Validation
    2. 4.2 Software Requirements
      1. 4.2.1 Getting Started MSPM0 Firmware
        1. 4.2.1.1 Download and Install Software Required for Board Test
        2. 4.2.1.2 Import the Project Into CCS
        3. 4.2.1.3 Compile the Project
        4. 4.2.1.4 Download Image and Spin Motor
    3. 4.3 Test Results
      1. 4.3.1 Test Setup
      2. 4.3.2 Auxiliary Power Supply Test
      3. 4.3.3 Current Open Loop Test
      4. 4.3.4 Overcurrent Protection Test
      5. 4.3.5 Motor Start-Up Sequence
      6. 4.3.6 Load Test
    4. 4.4 Migrate Firmware to a New Hardware Board
      1. 4.4.1 Configure the PWM, CMPSS, and ADC Modules
      2. 4.4.2 Motor and Control Parameters Tuning
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author
  13. 7Revision History

3.2 DC Bus Voltage Sensing

The DC voltage sensing circuit is used to convert the rectified voltage signal into a low-voltage signal, a low-cost resistor divider network as shown in Figure 3-2. The DC bus voltage can also be used to estimate AC input voltage.

TIDA-010250 DC Bus Sensing Circuit Figure 3-2 DC Bus Sensing Circuit