Boost PFC Converter with LC Filter

Purpose

Rectifier with boost converter and LC input filter for power factor correction

Library

Electrical / Nanostep

Description

This component implements a single-phase diode rectifier with a boost converter for power factor correction (PFC). It includes an LC filter on the AC side. The component 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. This implementation cannot handle commutation overlap of the diode rectifier. Therefore, the AC side must not be connected directly to an inductor.

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. In this configuration, the DC and AC sides are galvanically isolated. Any electrical connection between the two sides outside the component would therefore not reflect the real current and voltage situation and should be avoided. 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 Sub-cycle average and the Nanostep implementation cannot simulate a clamping of the DC output. Therefore, the output 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 specifying the DC side inductance, in henries \((\mathrm{H})\).

Winding resistance

A scalar specifying the winding resistance of the DC side inductor, in ohms \((\Omega)\).

Filter inductance

A scalar specifying the AC side filter inductance, in henries \((\mathrm{H})\).

Filter winding resistance

A scalar specifying the winding resistance of the AC side filter inductor, in ohms \((\Omega)\).

Filter capacitance

A scalar specifying the AC side filter capacitance, in farad \((\mathrm{F})\).

Filter capcitor series resistance

A scalar specifying the AC side filter capacitor series resistance, in ohms \((\Omega)\).

Probe Signals

DC inductor current

The current flowing out of the diode rectifier.

Filter capacitor voltage

The voltage across the filter capacitor.

Nanostep Probe Signals

See Fig. 257 for the probe signal positions.

DC inductor current

The current flowing out of the diode rectifier.

Filter inductor current

The current flowing into the converter.

Output current

The current flowing out of the converter.

Filter capacitor voltage

The voltage across the filter capacitor.

Gate signal

The gate signal applied to the active semiconductor switch.

Fig. 257 Nanostep probes for the Boost PFC Converter with LC Filter