Vienna Rectifier

Purpose

3-phase Vienna rectifier with filter inductors

Library

Electrical / Nanostep

Description

This component implements a 3-phase Vienna rectifier. It includes filter inductors on the AC side. In the model, the AC side and the DC side are electrically isolated from each other. Any electrical connection between the two sides outside the rectifier would therefore not reflect the real current and voltage situation and should be avoided. The rectifier offers two configurations:

Sub-cycle average

The gate input is a floating-point number with values between 0 and 1 representing the relative on-time of the controlled semiconductor over one simulation step. This technique is suited for real-time simulation on a CPU or a FlexArray solver.

Nanostep / Switched

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 rectifier have current source behavior and must each be connected directly to capacitors or voltage sources. 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 Sub-cycle average and the Nanostep implementation cannot simulate a clamping of the DC side. Therefore, the applied DC voltage must never become negative.

Parameters

Configuration

Allows you to chose between Sub-cycle average or Nanostep / Switched configuration.

Switch model (CPU code generation)

If the Configuration is set to Sub-cycle average, this parameter selects the switch model when CPU code is generated.

Semiconductor symbol

This setting lets you choose between IGBT and MOSFET for the symbol of the active semiconductor switch. It does not change the electrical behavior of the converter in simulation.

Inductance

A non-zero scalar or 3-element vector specifying the filter inductances, in henries \((\mathrm{H})\).

Winding resistance

A scalar or 3-element vector specifying the winding resistances, in ohms \((\Omega)\).

Nanostep Probe Signals

See Fig. 276 for the probe signal positions.

Fig. 276 Probes for the Vienna Rectifier

Inductor currents

The AC currents flowing into the rectifier.

DC currents

The currents flowing out of the DC side terminals of the rectifier.

Gate signals phase a

The gate signals of the active semiconductor switches of phase a.

Gate signals phase b

The gate signals of the active semiconductor switches of phase b.

Gate signals phase c

The gate signals of the active semiconductor switches of phase c.