SLAU927A March   2024  – June 2024 MSPM0G3507

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Hardware Setup
    1. 2.1  EVM Hardware Setup
      1. 2.1.1 EVM Hardware Support
    2. 2.2  Pin Configurations for IPD Usage
    3. 2.3  Pin Configurations for PWM Outputs
    4. 2.4  Pin Configurations for ADC Currents
    5. 2.5  Pin Configurations for ADC Voltages
    6. 2.6  Pin Configurations for Faults
    7. 2.7  Pin Configurations for GPIO Output Functions
    8. 2.8  Pin Configurations for SPI Communication
    9. 2.9  Pin Configurations for UART Communication
    10. 2.10 External Connections for Evaluation Boards
  6. 3Software Setup
    1. 3.1 Software Support
  7. 4GUI Setup
  8. 5Register Map
    1. 5.1 User Control Registers (Base Address = 0x20200400h)
    2. 5.2 User Input Registers (Base Address = 0x20200000h)
    3. 5.3 User Status Registers (Base Address = 0x20200430h)
  9. 6Basic Tuning
    1. 6.1 System Configuration Parameters
      1. 6.1.1 Configuring System Parameters from GUI
      2. 6.1.2 Motor Resistance in Milliohms (mΩ)
      3. 6.1.3 Motor Inductance in Microhenries (μH)
      4. 6.1.4 Saliency of IPMSM Motor
      5. 6.1.5 Motor BEMF Constant
      6. 6.1.6 Base Voltage (V)
      7. 6.1.7 Base Current (A)
      8. 6.1.8 Maximum Motor Electrical Speed (Hz)
    2. 6.2 Control Configurations for Basic Motor Spinning
      1. 6.2.1 Basic Motor Startup
        1. 6.2.1.1 Disable ISD
        2. 6.2.1.2 Motor Start Option - Align
        3. 6.2.1.3 Motor Open Loop Ramp
        4. 6.2.1.4 Motor Open Loop Debug
      2. 6.2.2 Controller Configuration for spinning the Motor in Closed Loop
        1. 6.2.2.1 PI Controller Tuning for Closed Loop Speed Control
        2. 6.2.2.2 Testing for Successful Startup Into Closed Loop
    3. 6.3 Fault Handling
      1. 6.3.1 Abnormal BEMF Fault [ABN_BEMF]
      2. 6.3.2 Monitoring Power Supply Voltage Fluctuations for Voltage Out of Bound Faults
      3. 6.3.3 No Motor Fault [NO_MTR]
  10. 7Advanced Tuning
    1. 7.1 Control Configurations Tuning
      1. 7.1.1  Initial Speed Detection of the Motor for Reliable Motor Resynchronization
      2. 7.1.2  Unidirectional Motor Drive Detecting Backward Spin
      3. 7.1.3  Preventing Back Spin of Rotor During Startup
      4. 7.1.4  Gradual and Smooth Start up Motion
      5. 7.1.5  Faster Startup Timing
      6. 7.1.6  Stopping Motor Quickly
      7. 7.1.7  Flux Weakening : Operating Motor at Speeds Higher than Rated Speed
      8. 7.1.8  Maximum Torque Per Ampere : Improve Efficiency of IPMSM Motors
      9. 7.1.9  Preventing Supply Voltage Overshoot During Motor Stop.
      10. 7.1.10 Protecting the Power Supply
      11. 7.1.11 FOC Bandwidth Selection
  11. 8Hardware Configurations
    1. 8.1 Direction Configuration
    2. 8.2 Brake Configuration
    3. 8.3 Main.h Definitions
    4. 8.4 Real Time Variable Tracking
  12. 9Revision History

7.1.9 Preventing Supply Voltage Overshoot During Motor Stop.

For applications that require preventing supply voltage overshoots during motor stop, select active spin down as Motor stop options. Active spin down can be used as a motor stop option in applications where fast stop is not required but some amount of inductive energy going back to power supply is acceptable

Step 1: Configure Motor stop options [MTR_STOP] to Active spin down

Step 2: Configure active spin down speed threshold [ACT_SPIN_THR]. It is recommended to set the ACT_SPIN_THR to 50% of the maximum speed. If there is voltage overshoot seen on the power supply, decrease the ACT_SPIN_THR till the voltage overshoot reaches acceptable limit.