Phase-Shifted Full-Bridge Converter

Purpose

Phase-shifted full-bridge converter with optional series capacitor, optimized for Real-Time Simulations on the RT Box.

Library

Electrical / Nanostep

Description

This component implements an isolated phase-shifted full-bridge converter with an output filter inductor. A series DC blocking capacitor to prevent transformer saturation is optional.

Both sides of the converter have current source behavior and must each be connected directly to a capacitor or a voltage source.

The power semiconductors are modelled as ideal switches controlled by instantaneous logical gate signals. A switch is turned on when the corresponding gate signal is true.

C code generated from this component is suitable for real-time simulations on the RT Box, where it is executed on a Nanostep solver. In this case, connect the gate inputs to PWM Capture blocks from the RT Box component library.

Note

This component has a Nanostep solver weight of \(3\), indicating that it occupies one entire Nanostep solver for Real-time Simulations on the RT Box.

Note

The voltage sources connected to the converter must not be short-circuited. Therefore, combinations of switching signals that cause shoot-through of DC links are not permitted. Additionally, DC voltages across diodes must not be negative, as DC voltage clamping through diodes is not permitted.

Parameters

Certain parameters are associated with specific components. The corresponding component labels such as \(\mathrm{L}\), \(\mathrm{C}\), etc., are shown in Fig. 277.

Semiconductor symbol

Use this setting to choose between IGBT and MOSFET for the symbol of the active semiconductor switches. This setting only affects the schematic representation and does not change the electrical behavior of the component.

Output rectifier

Use this setting to choose between center-tapped Half bridge and Full bridge output rectifier topology.

Include primary capacitor

Allows you to include (yes) or remove (no) a DC blocking capacitor at the primary side, to prevent transformer saturation.

Primary capacitance

If the Include primary capacitor option is set to yes, this parameter requires a non-zero scalar for the capacitance \(\mathrm{C}\), in farads \((\mathrm{F})\).

Primary inductance

A non-zero scalar specifying the primary-side inductance \(\mathrm{L}\), including the transformer leakage inductance and any external series-connected inductor, in henries \((\mathrm{H})\).

Winding resistance

A scalar specifying the winding resistance \(\mathrm{R_L}\), in ohms \((\Omega)\).

Include magnetizing inductance

Allows you to include (yes) or remove (no) the magnetizing inductance \(\mathrm{L_m}\) on the transformer primary side.

Magnetizing inductance

If the Include magnetizing inductance option is set to yes, this parameter requires a non-zero scalar specifying the magnetizing inductance of the transformer \(\mathrm{L_m}\), referred to the primary side, in henries \((\mathrm{H})\).

Turns ratio

A scalar specifying the ratio of primary-side turns to secondary-side turns.

Filter inductance

A non-zero scalar specifying the filter inductance \(\mathrm{L_f}\), in henries \((\mathrm{H})\).

Filter resistance

A scalar specifying the filter winding resistance \(\mathrm{R_{Lf}}\), in ohms \((\Omega)\).

Assertions

When set to on, the block flags an error for combinations of gate signals that cause shoot-through.

Probe Signals

See Fig. 277 for the probe signal positions.

Inductor current

The current through the inductor \(\mathrm{L}\), in amperes \((\mathrm{A})\), defined positive in the direction of the arrow.

Magnetizing current

The current through the inductor \(\mathrm{L_m}\), in amperes \((\mathrm{A})\), defined positive in the direction of the arrow.

Capacitor voltage

The voltage across the capacitor \(\mathrm{C}\), in volts \((\mathrm{V})\), defined positive at the side marked with (+).

Nanostep Probe Signals

Inductor current

The current through the inductor \(\mathrm{L}\), in amperes \((\mathrm{A})\), defined positive in the direction of the arrow.

Magnetizing current

The current through the inductor \(\mathrm{L_m}\), in amperes \((\mathrm{A})\), defined positive in the direction of the arrow.

Primary current

The current at the primary-side converter terminals, in amperes \((\mathrm{A})\), defined positive in the direction of the arrow.

Filter current

The current through the inductor \(\mathrm{L_f}\), in amperes \((\mathrm{A})\), defined positive in the direction of the arrow.

Capacitor voltage

The voltage across the capacitor \(\mathrm{C}\), in volts \((\mathrm{V})\), defined positive at the side marked with (+).

Gate signals

A vector containing the gate signals of the active semiconductor switches.

Fig. 277 Probes for the Phase-Shifted Full-Bridge Converter

---

↳ Added in PLECS 4.9.