Pwm Subsystem

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A closed-loop PWM power regulator with its controller wrapped in a reusable Subsystem.

Same power loop as the PWM power controller, but the whole controller is packed into a Subsystem with named ports: measured $V_R,I_R$ enter, a $\mathrm{gate}$ signal leaves to switch the IGBT feeding the 5 Ω load. Encapsulation lets you reuse or tidy the control block.

A PID compares the output against a setpoint and drives a PWM stage that switches an IGBT into a resistive load — but the control logic lives inside a Subsystem with named input/output ports, the pattern you use to encapsulate and reuse a control block or tidy a large sheet. Two scopes and a plot probe signals on both sides of the subsystem boundary.

Functionally this is the same power regulator as the PWM power controller: it measures V_R and I_R, forms the average power, and lets a PID trim the PWM duty until that power hits the P_ref = 30 setpoint on the 5 Ω load. The difference is packaging — everything but the raw power stage is hidden behind a Subsystem whose ports (V_R, I_R in; gate out) are the only wires crossing the boundary. That is exactly how you turn a working control loop into a drop-in block. The run uses a 50 µs step over 3 s; probe inside and outside the Subsystem to confirm the encapsulated signals match.