Traditional converters have only one type of control method, such as PWM, PFM, or PSM, which control duty cycle, frequency, and phase-shift angle, respectively. Some topologies, such as DAB-SRC, often require a mix of control methods.

Figure 1-1 shows the DAB-SRC topology, and one paper proposes a control scheme with four degrees of freedom⁽¹⁾, that is, a three-phase-shift (TPS) with varying frequency to improve the performance of the converter.

To verify this control logic, you often need to build a simulation model in simulation software, and PLECS is a very simple and fast simulation software. This paper gives an idea of building a control module for this kind of complex control.