3-Phase Dual Active Bridge
Purpose
Simple 3-phase dual active bridge converter without magnetizing inductance
Library
Electrical / Nanostep
Description
This component implements an isolated three-phase dual active bridge (DAB) converter with optional resonant capacitors.
The converter is simulated with time steps in the single-digit nanosecond range. The required Nanostep solver is available exclusively on the RT Box. Both sides of the converter have current source behavior and must each be connected directly to a capacitor or a voltage source. The implementation has a weight of 3, which means it occupies an entire Nanostep solver. For offline simulation, all power semiconductors in the converter are modeled with ideal switches. The individual switches are controlled with instantaneous logical gate signals. A switch is turned on when the corresponding gate signal is true.
Note
The Nanostep implementation cannot simulate a shoot-through or clamping of the DC sides. Therefore, the gate signals for the upper and lower switch in the same leg must never both become true at the same time. Also, the applied DC voltages must never become negative.
Parameters
- Semiconductor symbol
This setting lets you choose between
IGBTandMOSFETfor the symbol of the active semiconductor switches. It does not change the electrical behavior of the converter in simulation.- Include resonant capacitors
Allows you to include (
yes) or remove (no) the resonant capacitor.- Inductance
A non-zero scalar or 3-element vector specifying the transformer leakage inductances, referred to the primary side, in henries \((\mathrm{H})\).
- Winding resistance
A scalar or 3-element vector specifying the winding resistances, referred to the primary side, in ohms \((\Omega)\).
- Resonant capacitance
If the Include resonant capacitor option is set to
yes, this parameter requires a non-zero scalar or 3-element vector for the resonant capacitances, in farads \((\mathrm{F})\).- Turns ratio
A scalar specifying the ratio of primary-side turns to secondary-side turns.
- Assertions
When set to
on, the block will flag an error if both gate signals in any of the six half-bridges become true.
Probe Signals
- Inductor currents
The currents flowing into the primary side of the transformer.
- Capacitor voltages
The voltages across the resonant capacitors.
Nanostep Probe Signals
See Fig. 249 for the probe signal positions.
Fig. 249 Probes for the 3-Phase Dual Active Bridge
- Inductor currents
The currents flowing into the primary side of the transformer.
- Capacitor voltages
The voltages across the resonant capacitors.
- Primary current
The current flowing from the primary DC link into the converter.
- Secondary current
The current flowing from the secondary DC link into the converter.
- 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.