SLLU374 November   2024 MCF8329A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Hardware Design and Setup
    1. 2.1 Board Design
      1. 2.1.1 External MOSFET Selection
      2. 2.1.2 Gate Resistor Selection
      3. 2.1.3 Bootstrap and GVDD Capacitor Selection
      4. 2.1.4 Current Shunt Resistor Selection
      5. 2.1.5 VREG MOSFET Selection
      6. 2.1.6 Additional External Power Stage Components
  6. 3Connecting to the GUI
  7. 4Spinning Into Closed Loop
    1. 4.1 Essential Configuration
      1. 4.1.1 Loading Recommended Default Values
      2. 4.1.2 Setting Base Current
      3. 4.1.3 Setting Current Limits
      4. 4.1.4 Setting Voltage Limits
      5. 4.1.5 Input the Motor's Phase Resistance and Inductance
      6. 4.1.6 Maximum Electrical Speed (Hz)
      7. 4.1.7 Run MPET to Identify Motor Parameters
        1. 4.1.7.1 Skipping MPET Measurements
    2. 4.2 Testing for Successful Startup Into Closed Loop
  8. 5Basic Controls
    1. 5.1 Speed Input Mode
    2. 5.2 Preventing Back Spin of Rotor During Startup
    3. 5.3 Faster Startup Timing
    4. 5.4 Improving Speed Regulation
    5. 5.5 Limiting and Regulating Supply Power
    6. 5.6 MTPA Tuning
    7. 5.7 Motor Studio Optimization Wizards
  9. 6Fault Handling
    1. 6.1 MPET BEMF FAULT [MPET_BEMF_FAULT]
    2. 6.2 Abnormal BEMF Fault [ABN_BEMF]
    3. 6.3 Lock Current Limit [LOCK_LIMIT]
    4. 6.4 Hardware Lock Current Limit [HW_LOCK_LIMIT]
    5. 6.5 No Motor Fault [NO_MTR]
    6. 6.6 Abnormal Speed [ABN_SPEED]

5.1 Speed Input Mode

The MCF8329A offers four options to control the speed of the motor: PWM, frequency, Analog, and I2C. The desired speed mode can be set by changing the value of the SPEED_MODE register on the Advanced Tuning page. A description of how to configure these control methods is provided in the Motor Control Input Options section of the MCF8329A Sensorless Field Oriented Control (FOC) Three-phase BLDC Gate Driver Data Sheet.

Speed Mode Selection Figure 5-1 Speed Mode Selection

If I2C speed input is chosen, flip SW1 away from the other switches, see Figure 5-2, this will provide a the wake switch signal to the SPEED/WAKE pin to keep the MCF8329A out of sleep/standby mode. If a speed mode other than I2C is being used, flip the switch to the opposite as what is shown in Figure 5-2 to connect the speed pin to J13. For information on how to set J13, see the Description of User-Selectable Settings on MCF8329EVM (Default in Bold) table in the MCF8329EVM User's Guide.

SW1 Position for I2C Speed Mode Figure 5-2 SW1 Position for I2C Speed Mode