Symmetrical boost converter

This section describes the symmetrical boost converter

A block diagram and input parameters for symmetrical boost converter switching blocks are given in Table 1.

Table 1. The symmetrical boost converter component in the Schematic Editor core library
component component dialog window component parameters

Symmetrical boost converter
  • General
    • Control (Digital inputs, Internal modulator, Model)
    • S1(1..32)
    • S2(1..32)
    • gate_logic (active high, active low)
    • Gate control enabling (enables usage of external digital signal to enable the switching)
    • Sen (digital input selection for PWM enable)
Weight = 1

A schematic block diagram of the symmetrical boost switching block is given in Figure 1

Digital inputs, when selected for Control parameter, enables the user to assign gate drive inputs to any of the digital input pins (from 1 to 32). For example, if S1 is assigned to 1, the digital input pin 1 will be routed to the S1switch gate drive. In addition, gate_logic parameter selects either active high High-level input voltage VIH turns on the switch or active low (Low-level input voltage VIL turns on the switch) gate drive logic depending on the users external controller design.

Internal modulator, when selected for Control parameter, enables the user to use internal PWM modulator for driving switches S1 and S2 instead of digital input pins. In this configuration, three additional component inputs will be present. En input is used as enable/disable, while In1 and In2 are used as referent signals input for internal PWM modulator.

Figure 1. Schematic block diagram of symmetrical boost block diagram with corresponding switch naming
Model, when selected for Control parameter, enables the user to set the IGBTs gate drive signals directly from signal processing model. The input pin gates appears on the component and requires a vector input of two gate drive signals in the following order: [S1, S2]. When controlled from the model, logic is always active high.

Gate control enabling, when checked, enables using an external PWM enabling digital signal.