Voltage source inverter with induction motor

A Voltage Source Inverter (VSI) driving an Induction Motor (IM) is a standard configuration for electric drives, commonly used in EVs, HVACز

Step-by-Step Implementation in Simulink:1. DC Source

• Use a DC Voltage Source block to power the inverter (e.g., 540 VDC).

2. Three-Phase VSI

• Use the block:Simscape > Electrical > Specialized Power Systems > Power Electronics > Universal Bridge
• Set it to use IGBTs or MOSFETs.
• Configure for 3 legs (3-phase inverter).

3. PWM Pulse Generation

• Use a PWM Generator (3-phase) or custom logic with Pulse Generator + Carrier wave.
• Typical switching frequency: 2 kHz – 10 kHz.
• Control input: use constant for open-loop, or feed from a speed controller in closed-loop.

4. Induction Motor

• Use:Simscape > Electrical > Specialized Power Systems > Machines > Asynchronous Machine SI Units
• Set rated power, voltage, and speed.

5. Mechanical Load

• Add a Load Torque block (constant or variable).

6. Measurements

• Use:
• Current Measurement
• Speed Sensor
• Voltage Measurement
• Connect to Scopes to monitor performance.

7. Control (Optional for Closed Loop)

• Add a PI speed controller comparing motor speed with a reference.
• Output of the controller modulates the inverter's PWM frequency or modulation index.