SPRUIQ4 May   2019 TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1 , TMS320F28374D , TMS320F28374S , TMS320F28375D , TMS320F28375S , TMS320F28375S-Q1 , TMS320F28376D , TMS320F28376S , TMS320F28377D , TMS320F28377D-EP , TMS320F28377D-Q1 , TMS320F28377S , TMS320F28377S-Q1 , TMS320F28378D , TMS320F28378S , TMS320F28379D , TMS320F28379D-Q1 , TMS320F28379S

 

  1.   Introduction
    1.     Trademarks
    2.     Overview
  2. 1Getting Familiar With the Kit
    1. 1.1 Contents of the Kit
    2. 1.2 IDDK EVM Features
  3. 2Hardware Overview
    1. 2.1  IDDK Evaluation Board
    2. 2.2  Functional Blocks
    3. 2.3  Processor Section
    4. 2.4  Control Processor Slot – H1
    5. 2.5  Expansion Processor Slots
      1. 2.5.1 Real-time Connectivity – H7
      2. 2.5.2 Functional Safety – H8
    6. 2.6  Position Encoder Suite
      1. 2.6.1 QEP
      2. 2.6.2 Resolver
      3. 2.6.3 Sin-Cos Encoder
      4. 2.6.4 BiSS / EnDat Encoder
      5. 2.6.5 TI Design Interface Connector
    7. 2.7  Current Sensor Suite
      1. 2.7.1 Shunt Current Sensing
      2. 2.7.2 LEM Current Sensing
      3. 2.7.3 Sigma-Delta Current Sensing
      4. 2.7.4 Overcurrent Protection
    8. 2.8  Power Supplies and GND Plane Configurations
    9. 2.9  Rectifier and Inverter
      1. 2.9.1 Rectifier Stage
        1. 2.9.1.1 Connecting the External DC Supply to the DC Link
        2. 2.9.1.2 Connecting Rectifier Output to DC Link
      2. 2.9.2 Inverter Stage
    10. 2.10 DACs
    11. 2.11 Power Stage Disable Circuits
  4. 3Hardware Resource Mapping
    1. 3.1 Digital Signal Mapping
    2. 3.2 Analog Signal Mapping
    3. 3.3 Jumpers and Switches
    4. 3.4 Headers and Connectors

2.7.3 Sigma-Delta Current Sensing

Sigma-delta current sensing is a macro (M7). Connected in series to the motor phases, voltage across a shunt resistor is measured digitally using isolated delta-sigma converters.

All current sensing topologies are designed to give 1.0 per unit value for a current of approximately 10 A. You can sense the currents using all three of them at the same time. You can choose the current feedback to close the current loop using the software.