In this model, a MOSFET driven by a pulse-width modulation (PWM) signal is used for
switching. The output voltage Vout should be regulated to the reference value Vref. A
digital PID controller adjusts the PWM duty cycle, Duty, based on the voltage error signal.
For this example, you estimate a linear model from the PWM duty cycle to the load
voltage Vout.
Simscape Electrical software contains predefined blocks for many power electronics
systems. This model contains a variant subsystem with two versions of the boost
converter model:
- Boost converter circuit constructed using electrical power components. The
parameters of the circuit components are based on [1]. - Boost converter block configured to have the same parameters as the boost converter
circuit. For more information on this block, see Boost Converter.
Find Model Operating Point
To design a controller for the boost converter, you must first determine the steady-state
operating point at which you want the converter to operate. For more information on
finding operating points, see “Find Steady-State Operating Points for Simscape Models”
on page 1-136. For this example, use an operating point estimated from a simulation
snapshot.