SLLA665 April   2025 MCF8315A , MCF8315C , MCF8315C-Q1 , MCF8315D , MCF8316A , MCF8316C-Q1 , MCF8316D , MCF8329A , MCF8329A-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Open Loop and Handoff Stage
  5. 2EEPROM Configurations Affecting Open Loop to Closed Loop Handoff
  6. 3Open Loop to Closed Loop Handoff Tuning
    1. 3.1 Experimental Way to Tune Open Loop and Handoff Stage
      1. 3.1.1 Step-1: Initial Configuration
      2. 3.1.2 Step-2: Tuning of Parameters In Case Handoff is not Proper
        1. 3.1.2.1 Tuning of OL_ILIMIT
        2. 3.1.2.2 Tuning of Open Loop Acceleration Co-Efficient A1
        3. 3.1.2.3 Tuning of Handoff Thresholds
      3. 3.1.3 Step-3: Tuning of Handoff Configurations
  7. 4Optimum Handoff
    1. 4.1 Open Loop Time With the Recommended Settings
    2. 4.2 Open Loop Time by Following Optimum Handoff Steps
  8. 5Summary
  9. 6References

4.2 Open Loop Time by Following Optimum Handoff Steps

MOTOR 3: Rated current = 2A, Maximum speed =300Hz

After following the optimum handoff steps mentioned in Section 4, the following settings for MOTOR 3 are derived. (can be different for other motors but the procedure is same).

OL_ILIMIT = 2A, OL_ACC_A1 = 50Hz/s, OL_ACC_A2 = 25Hz/s^2, OPN_CL_HANDOFF_THR = 18%

Open Loop Time by Following Optimum Handoff Steps Figure 4-2 Open Loop Time by Following Optimum Handoff Steps

From Figure 4-2, open loop is roughly 1s × 0.9 div = 0.9s which is less than the Open loop time (2.4s) in Figure 4-1