JAJU879 November   2022

 

  1.   概要
  2.   リソース
  3.   特長
  4.   アプリケーション
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TMS320F280039C
      2. 2.3.2 UCC21530-Q1
      3. 2.3.3 OPA607-Q1
      4. 2.3.4 LM25184-Q1
      5. 2.3.5 TCAN1044A-Q1
    4. 2.4 System Design Theory
      1. 2.4.1 Three-Phase PMSM Drive
      2. 2.4.2 Field Oriented Control of PM Synchronous Motor
      3. 2.4.3 Field Weakening (FW) and Maximum Torque Per Ampere (MTPA) Control
      4. 2.4.4 Compressor Drive with Automatic Vibration Compensation
      5. 2.4.5 Hardware Prerequisites for Motor Drive
        1. 2.4.5.1 Motor Current Feedback
          1. 2.4.5.1.1 Current Sensing with Three-Shunt
          2. 2.4.5.1.2 Current Sensing with Single-Shunt
        2. 2.4.5.2 Motor Voltage Feedback
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 Hardware Board Overview
      2. 3.1.2 Test Conditions
      3. 3.1.3 Test Equipment Required for Board Validation
    2. 3.2 Test Setup
      1. 3.2.1 Hardware Setup
      2. 3.2.2 Software Setup
        1. 3.2.2.1 Code Composer Studio Project
        2. 3.2.2.2 Software Structure
    3. 3.3 Test Procedure
      1. 3.3.1 Level 1 Incremental Build
        1. 3.3.1.1 Project Setup
        2. 3.3.1.2 Running the Application
      2. 3.3.2 Level 2 Incremental Build
        1. 3.3.2.1 Project Setup
        2. 3.3.2.2 Running the Application
      3. 3.3.3 Level 3 Incremental Build
        1. 3.3.3.1 Project Setup
        2. 3.3.3.2 Running the Application
      4. 3.3.4 Level 4 Incremental Build
        1. 3.3.4.1 Project Setup
        2. 3.3.4.2 Running the Application
        3. 3.3.4.3 Tuning Field Weakening and MTPA Control
        4. 3.3.4.4 Tuning Vibration Compensation
        5. 3.3.4.5 CAN FD Command Interface
    4. 3.4 Test Results
      1. 3.4.1 MCU CPU Load, Memory, and Peripheral Usage
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 サポート・リソース
    5. 4.5 Trademarks

3.2.2.2 Software Structure

The general structure of the project is shown in Figure 3-5. The device peripheral configuration is based on C2000Ware Driverlib and is partially generated using SysConfig. You only need to change the hal.c, hal.syscfg, and hal.h files and the parameters in user_mtr1.h if you want to migrate the reference design software to your own board or a different device.

GUID-20221101-SS0I-VDLC-2HP2-GSCZRW3DCKPK-low.png Figure 3-5 Project Structure Overview

Figure 3-6 shows the project software flow diagram of the firmware that includes one ISR for real time motor control, a main loop for motor control parameters update in background loop. The ISR will be triggered by ADC End of Conversion (EOC).

Figure 3-6 Flowcharts of Background Software and Motor Control ISR

To simplify the system bring up and design, the software is organized into four incremental builds described in Table 3-1, which makes learning and getting familiar with the board and software easier. This approach is also helpful for debugging and testing boards. To select a particular build option, you will edit the DMC_BUILDLEVEL option in sys_settings.h file and rebuild the project. This process is described in the detail in the next section.

Table 3-1 Incremental Build Options
DMC_BUILDLEVEL Value Description
DMC_LEVEL_1 50% duty, offset calibration and verify phase shift
DMC_LEVEL_2 Open loop control to check sensing signals
DMC_LEVEL_3 Closed current loop to check the hardware settings
DMC_LEVEL_4 Parameters identification and run with InstaSPIN-FOC