Industrial control systems can be categorized in two types: open-loop and closed-loop systems. The open-loop control system is a continuous control system that provides no feedback from its output.

Fig. 5 is a simple block diagram of the desired system. An example of a closed-loop system is the use of a thermistor for temperature feedback, with results shown in Fig. 6 .

Closed-loop flyback converter block diagram. Before making the necessary calculations for the controller to stabilize the peak current control mode flyback, it’s important to understand the components ...