Half-Bridge LLC Converter with Synchronous Rectification
Purpose
Half-bridge LLC resonant converter with synchronous rectification, optimized for Real-Time Simulations on the RT Box.
Library
Electrical / Nanostep
Description
This component implements an isolated LLC resonant converter with a half bridge on the input side and a half bridge synchronous rectifier on the output side. To realize a full-bridge synchronous rectifier, use the CLLLC Converter component configured without secondary-side capacitance.
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. 273.
- 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 \((\Omega)\).
- Magnetizing inductance
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.
- Resonant capacitance
A non-zero scalar for the resonant capacitance \(\mathrm{C}\) on the primary side, in farads \((\mathrm{F})\).
- Assertions
When set to
on, the block flags an error for combinations of gate signals that cause shoot-through.
Probe Signals
See Fig. 273 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.
- Secondary current
The current at the secondary-side converter terminals, 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 (+).
- Primary gate signals
A vector containing the gate signals of the primary-side semiconductor switches.
- Secondary gate signals
A vector containing the gate signals of the secondary-side semiconductor switches.
Fig. 273 Probe Signals for the Half-Bridge LLC Converter with Synchronous Rectifier
↳ Added in PLECS 5.0.