TIDUF84 June   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 UCC28810
      2. 2.3.2 MCF8315
      3. 2.3.3 MSPM0L
      4. 2.3.4 MSPM0C
  9. 3System Design Theory
    1. 3.1 MCF8315 Design
      1. 3.1.1 Power section
      2. 3.1.2 GPIO section
    2. 3.2 ACDC Design: Single Stage PFC
    3. 3.3 Host MCU Design
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
      1. 4.1.1 Hardware Overview
      2. 4.1.2 TIDA-010951 PCB
    2. 4.2 Software Requirements
    3. 4.3 Testing requirements
    4. 4.4 Test Setup
    5. 4.5 Test Results
      1. 4.5.1 Power Management in TIDA-010951
      2. 4.5.2 UCC28810 Based Single Stage PFC
      3. 4.5.3 BLDC Residential Fan Operation Using MCF8315C
        1. 4.5.3.1 Power-Up Sequence
        2. 4.5.3.2 Forward Windmilling (ISD Forward Resync)
        3. 4.5.3.3 Reverse Windmilling (ISD Reverse Resync)
        4. 4.5.3.4 Direction Reversal
        5. 4.5.3.5 Fan Acceleration/Deceleration
      4. 4.5.4 Thermal Performance
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author
  13. 7Recognition

4.5.3.3 Reverse Windmilling (ISD Reverse Resync)

Figure 4-6 shows the reverse windmilling (ISD reverse resync) capability of MCF8315C-Q1. In this test case, the fan is coasting in the reverse direction (due to cross winds) when a speed command is received. MCF8315C-Q1 resyncs in the reverse direction, decelerates the fan to zero speed in a smooth, controlled manner and then accelerates in the forward direction to set speed.

TIDA-010951 Reverse Windmilling (ISD Reverse Resync) Figure 4-8 Reverse Windmilling (ISD Reverse Resync)