Design and simulation of a DC–DC boost converter using feedforward duty-cycle compensation to improve transient response, voltage regulation, and disturbance rejection under input variations.
This project focuses on the system-level modeling and simulation of a DC–DC boost converter in MATLAB/Simulink. The study evaluates the effectiveness of feedforward control in improving converter dynamic performance during startup and parameter variation.
Comparative analysis is performed between open-loop operation and feedforward-assisted control to observe improvements in output voltage stabilization and transient response.
The boost converter is implemented using standard Simulink power electronics blocks.
The model includes:
- DC input voltage source
- Controlled switching device
- Diode
- Inductor
- Output capacitor
- Resistive load
- Feedforward control path for duty-cycle adjustment
The work focuses on system-level dynamic behavior, not device-level switching losses or transistor modeling.
- Fixed duty cycle operation
- Slower output voltage rise
- Higher transient deviation
- Regulation dependent on passive component values
- Duty cycle dynamically adjusted based on system conditions
- Faster transient response
- Improved steady-state voltage regulation
- Reduced sensitivity to input disturbances
The effect of inductance on converter dynamics is analyzed.
- L = 15.625 mH → Faster response, higher ripple
- L = 100 mH → Reduced ripple, moderate response speed
- L = 150 mH → Smoothest waveform, increased settling time
This demonstrates the trade-off between dynamic speed and output ripple.
- Feedforward duty-cycle compensation improves transient performance
- Inductor value significantly affects ripple and settling time
- Simulation modeling enables early design exploration before hardware realization
- MATLAB
- Simulink
- Closed-loop PI/PID controller design
- Small-signal stability modeling
- Efficiency and switching loss estimation
- Hardware implementation using PWM controller
- Digital control realization
Sriti Sancharika
VLSI | DSP | FPGA | Power Electronics