DVM - Design Verification Module

AC Fixed Input Source

The AC fixed Input Source models a fixed line voltage with fixed frequency. This source is used in a number of test objectives, including:

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Model Name

AC Fixed Input Source

Simulator

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

Parts Selector
Menu Location

DVM ▶Sources ▶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_FIXED
Schematic DVM AC Fixed Source

AC Fixed 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

DC_VOLTAGE

 5 Real   V The DC voltage offset of the source

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.

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 Ω

Sets the source resistance of the source.

Testplan Entry

To set a managed DVM source to use the AC Fixed subcircuit, the source symbol must be set to support AC line sources. Then, to set the source definition to a AC Fixed source, place a AcFixed() testplan entry in a Source column.

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

AcFixed(REF, LINE_RANGE, VOLTAGE, FREQUENCY)

AcFixed(REF, LINE_RANGE, VOLTAGE, FREQUENCY, 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.

VOLTAGE

min:0

The RMS 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.

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°, which sets the line source to start at the peak of the sine wave.

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