Sensorless FOC - DRV8329 Gate Driver User Guide

This User Guide outlines the usage of DRV8329 gate driver along with the sensorless FOC Application running on MSPM0.

1. Hardware Required

  • LP-MSPM0G3507 - MSPM0G3507 Launchpad

  • DRV8329AEVM - DRV8329AEVM is a 30-A, 3-phase brushless DC drive stage based on the DRV8329A gate driver for BLDC motors.

  • DC Power supply that supports the required voltage and current

  • Brushless-DC Motor

  • Micro-USB cable

2. Hardware Setup

  1. Remove the PA26 jumper J18 in the LP-MSPM0G3507 as shown below.

J18 header removed in LP-MSPM0G3507

Fig. 25 J18 header removed in LP-MSPM0G3507

  1. By Default in DRV8329AEVM shunt resistor R44 is populated with 0.001ohms this resistor need to be changed to 20mOhms.

  2. R18, R20 to be populated with zero ohm resistor to connect nFault input to 15th Pin in J8. Also remove R23 to remove NFAULT from 19th pin in J9.

  3. Desolder R24 and populate R19 with zero ohm resistor to move POT input from 14th pin to 3rd pin in J8/J9 connector.

  4. Remove J2 in DRV8329AEVM to make dead time set to 55ns, user can use the MCU dead time to insert dead time.

  5. User can select the CSA Gain using the connector J2. By default, the base current in FW is computed with CSA Gain of 20V/v and 20mOhm resistance.

  6. Desolder R14, R15 removed to disconnect 3.3V and 5V to LP.

  7. Connect the LP-MSPM0G3507 to the DRV8329AEVM in one of two ways:

    • 1 Plug the connectors J8 and J9 of the DRV8329AEVM to the top of the connectors J3/J4 of the LP-MSPM0G3507. An Additional connection need to be made from ISENA in DRV8329AEVM to the PA24 in LP-MSPM0G3507.

    • 2 If using the jumper wires, connect as shown in the table below. Refer to the schematic of J3 and J4 connector pinout on DRV8329AEVM for the location of the signals.

      Connection

      MSPM0G3507

      DRV8329AEVM

      Phase A HS input

      PB4

      INHA

      Phase A LS input

      PB1

      INLA

      Phase B HS input

      PA28

      INHB

      Phase B LS input

      PA31

      INLB

      Phase C HS input

      PB20

      INHC

      Phase C LS input

      PB13

      INLC

      Bus voltage input

      PA18

      VSENVM

      Bus current input 1

      PA17

      ISENA

      Bus current input 2

      PA24

      ISENA

      Phase A Voltage input

      PB19

      VSENA

      Phase B Voltage input

      PA22

      VSENB

      Phase C Voltage input

      PB18

      VSENC

      Fault Input

      PA27

      nFAULT

      DRV Enable output

      PB6

      DRVOFF

      DRV sleep

      PA26

      nSLEEP

      Common Ground

      GND

      GND
DRV8329AEVM J8 and J9 connector pinout

Fig. 26 DRV8329AEVM J8 and J9 connector pinout

Note: The output from the single shunt current sense is to be routed to ADC 0 & 1 through Pins PA24 and PA17 respectively.

  1. Place nSLEEP switch in WAKE position and DRVOFF in ON position.

  2. Connect the 3 phases of the BLDC motor to A/B/C of connector J13 on the DRV8329AEVM.

  3. Connect the positive and negative of the power supply to VM and GND of the power connector terminal block.

  4. Set the power supply to to a motor voltage between 4.5V to 60V within the DRV8329AEVM specifications and a 30-A current limit.

  5. Connect a Micro-USB cable from the LP-MSPM0G3507 to the PC.

  6. Turn on the power supply. The green VM LED on the DRV8329AEVM should turn on.

  7. Once all steps are completed, Please refer to Software User Guide for steps on importing the CCS project or FOC Tuning Guide for steps to tune and spin the motor.