DVM - Design Verification Module

AC Quasi-Square-Wave Input Source

The AC quasi-square-wave input source models the line voltage typically generated by inverters.

The AC Quasi-Square-Wave source (QSW) is not used in any test objectives. You can set a AC Source to a QSW type source using the testplan syntax below.

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Model Name

AC Quasi-Square-Wave Input Source

Simulator

This device is compatible with both the SIMetrix and SIMPLIS simulators.

Parts Selector
Menu Location

DVM ▶ Source ▶ DVM Input Source (w/ AC Line Support)

Symbol Library

None - the symbol is automatically generated when placed or edited.

Model File

SIMPLIS_DVM_ADVANCED.lb

Subcircuit Name SIMPLIS_DVM_ADVANCED_SOURCE_AC_QSW
Schematic DVM AC Quasi-Square-Wave Source

AC Quasi-Square-Wave Input Source Parameters

The following table explains the relevant parameters.

Parameter Name

Default

Data Type

Range

Units

Parameter Description

AC_VOLTAGE1

115

Real

min: 0

V The RMS value of the source during normal operating conditions.

FREQUENCY

50

Real

min: >0 Hz The frequency of the source

F_CORNER

1Meg

Real

min: >0

Hz

The corner frequency for the internal low pass filter. The number of poles is set by the N_ORDER parameter.

LINE_PHASEANGLE

0

Real

0- 360 ° Sets the source phase angle at time=0. Most often used in three phase systems to set the phase angle of each phase.

N_ORDER

0

Real

0 - 3   The number of poles in the filter. Set to 0 to remove the filter from the design.

PULSE_WIDTH

200u

Real

min:0

s

The duration of the pulse in seconds.

RISE_TIME

10u

Real

min:>0 s The rise and fall time of the internal square wave source. See the waveforms section for details.

SLEW_RATE

10Meg

Real

max: V/s The maximum slew rate of the voltage source

SOURCE_INDUCTANCE

795.8u

Real

min: 0

H

Sets the inductance of the line source

SOURCE_NAME

SRC

String

n/a

n/a

Name of the DVM source. This name cannot contain spaces.

SOURCE_RESISTANCE

0.4

Real

min:0

Sets the source resistance of the source.

Testplan Entry

To set a managed DVM source to use the AC Quasi-Square-Wave subcircuit, the source symbol must be set to support AC line sources. Then, to set the source definition to a AC QSW source, place a AcQsw() testplan entry in a Source column.

The AcQsw()  testplan entry has the following syntax with the arguments taken from the list of parameters above.

AcQsw(REF, LINE_RANGE, AC_VOLTAGE1, FREQUENCY, PULSE_WIDTH, RISE_TIME)
AcQsw(REF, LINE_RANGE, AC_VOLTAGE1, FREQUENCY, PULSE_WIDTH, RISE_TIME, OPTIONAL_PARAMETER_STRING)  

Argument Range Description

REF

n/a

The actual reference designator of the DVM Source or the generic syntax of INPUT:n where n is an integer indicating a position in the list of managed DVM sources

LINE_RANGE

LL or HL

The line range to select the correct symbolic voltage value. This can only be the two strings LL or HL.

AC_VOLTAGE1

min:0

The pulse voltage for the input source. The voltage can be a numeric value or a symbolic value, such as a percentage of nominal input voltage. Symbolic values use the LINE_RANGE parameter to find the correct symbolic value.

FREQUENCY

min: > 0

The AC line frequency of the input source. This is used to both set the frequency of the input source and to set the simulation timing. The frequency can be a numeric or a symbolic value, such as F_High or F_Low.

PULSE_WIDTH

min:>0

The pulse duration of the source

RISE_TIME

mon:>0

The rise and fall times of the source

OPTIONAL_PARAMETER_STRING

n/a

Parameter string with any of the other parameters from the parameter table above*

*    If more than one parameter is specified, join the parameter key-value pairs with a space, as shown in the example below. The order of the parameter names does not matter.

Waveforms

This example uses the optional parameter LINE_PHASEANGLE set to 90°. The pulse width is set to 30% of the period and the rise time to 5% of the period.

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