single phase inverter

Single-phase inverter model in Simulink using SPWM, full bridge IGBTs, open-loop control, and RMS output analysis.

This Simulink model demonstrates the operation of a single-phase inverter with SPWM control. The inverter converts a DC input into an AC output using a full-bridge IGBT configuration. The control is achieved through sinusoidal PWM, generated by comparing a sinusoidal reference with a high-frequency triangular carrier.System Ratings & Parameters:

• DC Input Voltage: 400 V
• Reference Sine Wave:
• Amplitude = 0.9
• Frequency = 50 Hz
• Carrier (PWM) Signal:
• Time values = [0, 0.00005, 0.0001]
• Output values = [-1, 1, -1]
• Equivalent carrier frequency ≈ 10 kHz
• Filter Components (LC Filter):
• Inductor (L) = 4.06 mH
• Capacitor (C) = 100 µF
• Load:
• Resistance (R) = 50 Ω

Features:

• Full-bridge inverter using IGBT switches.
• Sinusoidal PWM open-loop control.
• LC filter for harmonic reduction and smooth sinusoidal output.
• RMS measurement of output voltage.
• Scope visualization for waveform analysis.

Applications:

• Renewable energy integration (solar PV, battery storage).
• Standalone inverter design.
• Educational tool for power electronics and PWM-based inverter control.