SLAU927 March   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 = 0x202000C8h)
    2. 5.2 User Input Registers (Base Address = 0x20200000h)
  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 Motor BEMF Constant
      5. 6.1.5 Base Voltage (V)
      6. 6.1.6 Base Current (A)
      7. 6.1.7 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 Preventing Supply Voltage Overshoot During Motor Stop.
      8. 7.1.8 Protecting the Power supply
    2. 7.2 Hardware Configurations
      1. 7.2.1 Direction Configuration
      2. 7.2.2 Brake Configuration
      3. 7.2.3 Real Time Variable Tracking
  11. 8Revision History

6.1.3 Motor Inductance in Microhenries (μH)

From the motor data sheet, input the motor phase inductance in microhenry (μH) using the mtrInductance parameter in the System Configuration page. To know the motor inductance, measure the phase-to-phase inductance at 1kHz across any two phases using an LCR meter. Calculate the phase inductance by dividing the phase to phase inductance by 2 as shown in Figure 6-3.

Equation 8. P h a s e   I n d u c t a n c e   =   M e a s u r e d   P h a s e   t o   P h a s e   I n d u c t a n c e   ×   ( 0.5 )  

Motor phase inductance refers to the inductance from the phase output to the center tap, LPH , as shown in Figure 6-3. For motors with different phase to phase inductances, measure all three phase to phase inductances and calculate the average and use this value as the phase to phase inductance. This measurement is valid for both star wound and delta wound motors.


GUID-20240202-SS0I-M9WQ-L8L4-TBRFMVCL0V2M-low.png

Figure 6-3 Inductance Measurement