Json
{
  "schematicConnections": {
    "connections": [
      {
        "from": "J1+",
        "to": "C1+",
        "net": "V_IN"
      },
      {
        "from": "C1+",
        "to": "U3_IN",
        "net": "V_IN"
      },
      {
        "from": "J1+",
        "to": "R1_In",
        "net": "V_IN"
      },
      {
        "from": "J1-",
        "to": "GND",
        "net": "GND"
      },
      {
        "from": "C1-",
        "to": "GND",
        "net": "GND"
      },
      {
        "from": "C2+",
        "to": "U1_VDD",
        "net": "3.3V"
      },
      {
        "from": "C2-",
        "to": "GND",
        "net": "GND"
      },
      {
        "from": "U4_out",
        "to": "U1_VDD",
        "net": "3.3V"
      },
      {
        "from": "U3_out",
        "to": "U2_VCC",
        "net": "V_DRIVER"
      },
      {
        "from": "U3_out",
        "to": "U6_VCC",
        "net": "V_DRIVER"
      },
      {
        "from": "U3_out",
        "to": "U7_VCC",
        "net": "V_DRIVER"
      },
      {
        "from": "U1_PWM1",
        "to": "U2_IN",
        "net": "PWM_A"
      },
      {
        "from": "U1_PWM2",
        "to": "U6_IN",
        "net": "PWM_B"
      },
      {
        "from": "U1_PWM3",
        "to": "U7_IN",
        "net": "PWM_C"
      },
      {
        "from": "U2_HO",
        "to": "Q1_Gate",
        "net": "Gate_A"
      },
      {
        "from": "U2_LO",
        "to": "Q2_Gate",
        "net": "Gate_A"
      },
      {
        "from": "U6_HO",
        "to": "Q3_Gate",
        "net": "Gate_B"
      },
      {
        "from": "U6_LO",
        "to": "Q4_Gate",
        "net": "Gate_B"
      },
      {
        "from": "U7_HO",
        "to": "Q5_Gate",
        "net": "Gate_C"
      },
      {
        "from": "U7_LO",
        "to": "Q6_Gate",
        "net": "Gate_C"
      },
      {
        "from": "Q1_Collector",
        "to": "V_IN",
        "net": "V_BUS_A"
      },
      {
        "from": "Q3_Collector",
        "to": "V_IN",
        "net": "V_BUS_B"
      },
      {
        "from": "Q5_Collector",
        "to": "V_IN",
        "net": "V_BUS_C"
      },
      {
        "from": "Q2_Emitter",
        "to": "GND",
        "net": "GND"
      },
      {
        "from": "Q4_Emitter",
        "to": "GND",
        "net": "GND"
      },
      {
        "from": "Q6_Emitter",
        "to": "GND",
        "net": "GND"
      },
      {
        "from": "Q1_Q2_Junction",
        "to": "J2_PhaseA",
        "net": "Phase_A"
      },
      {
        "from": "Q3_Q4_Junction",
        "to": "J2_PhaseB",
        "net": "Phase_B"
      },
      {
        "from": "Q5_Q6_Junction",
        "to": "J2_PhaseC",
        "net": "Phase_C"
      },
      {
        "from": "R1_Out",
        "to": "U5_Input",
        "net": "Current_Sense"
      },
      {
        "from": "U5_GND",
        "to": "GND",
        "net": "GND"
      },
      {
        "from": "U5_Vdiv",
        "to": "V_IN",
        "net": "Voltage_Divider"
      },
      {
        "from": "NTC1",
        "to": "U1_ADC",
        "net": "Temp_Sense"
      },
      {
        "from": "NTC1",
        "to": "GND",
        "net": "GND"
      }
    ]
  }
}

• Power Rail Wiring:
  • The battery input at [J1] is connected to the bulk capacitor [C1] for filtering and supply to the DC-DC converter [U3] and shunt resistor [R1] for current sensing.
  • All negative terminals are connected to the [GND] component.
• Auxiliary Supplies:
  • A decoupling network ([C2] and [U4]) supplies the microcontroller [U1] with a stable 3.3V.
  • The DC-DC converter's output powers the IR2110 gate drivers ([U2], [U6], [U7]) ensuring proper voltage for switching.
• Gate Driver and PWM Signals:
  • PWM outputs from [U1] control the IR2110 drivers (each receiving their specific PWM for a phase) that, in turn, drive the corresponding pair of IGBTs ([Q1]/[Q2] for Phase A, [Q3]/[Q4] for Phase B, [Q5]/[Q6] for Phase C).
• Power Stage:
  • The high side IGBTs (Q1, Q3, Q5) are connected at their collectors to the DC bus while the low side IGBTs (Q2, Q4, Q6) are grounded.
  • The motor phase outputs [J2] are tapped at the junctions of each half bridge.
• Sensing Circuits:
  • The shunt resistor [R1] (and associated voltage divider in [U5]) is used for current sensing.
  • The NTC thermistor [NTC1] is connected to an ADC channel on [U1] for temperature monitoring.