SLLA663 March   2025 MCF8315A , MCF8315C , MCF8315C-Q1 , MCF8315D , MCF8316A , MCF8316C-Q1 , MCF8316D , MCF8329A , MCT8315A , MCT8316A , MCT8329A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2End Application Configuration Recommendation
    1. 2.1 Resynchronization
    2. 2.2 Reverse Drive
    3. 2.3 Coasting (Hi-Z)
    4. 2.4 Startup Brake
    5. 2.5 Direction Change Mode
  6. 3Tuning Guidance
    1. 3.1 Initial Speed Detection Module
      1. 3.1.1 Initial Speed Detection
      2. 3.1.2 ISD Times
      3. 3.1.3 Stationary Detect Threshold
    2. 3.2 Resynchronization
      1. 3.2.1 Forward Drive Resync Threshold
      2. 3.2.2 Reverse Drive
      3. 3.2.3 Reverse Acceleration Parameters
      4. 3.2.4 Reverse Drive Current Limits
      5. 3.2.5 Reverse Drive Handoff Threshold
      6. 3.2.6 Reverse Drive Open Loop Deceleration (REV_DRV_OPEN_LOOP _DEC)
    3. 3.3 Coasting (Hi-Z)
    4. 3.4 Brake
      1. 3.4.1 Brake Config (BRK_CONFIG)
  7. 4Feature Availability of MCx Devices
    1. 4.1 FOC Family (MCF83xx devices)
    2. 4.2 TRAP Family (MCT83xx devices)
  8. 5Summary
  9. 6References

3.2.5 Reverse Drive Handoff Threshold

This parameter sets the speed threshold in reverse direction at which the device transitions from closed loop to open loop.

Too High REV_DRV_HANDOFF_THR Losing Sync due to Blind Deceleration in Reverse Open LoopFigure 3-16 Too High REV_DRV_HANDOFF_THR Losing Sync due to Blind Deceleration in Reverse Open Loop
Successful Direction Reversal With Proper REV_DRV_HANDOFF_THRFigure 3-18 Successful Direction Reversal With Proper REV_DRV_HANDOFF_THR
Too low REV_DRV_HANDOFF_THR Losing Sync due to Unreliable BEMF in Reverse Closed LoopFigure 3-17 Too low REV_DRV_HANDOFF_THR Losing Sync due to Unreliable BEMF in Reverse Closed Loop