DVM - Design Verification Module

AC Line Dropout Input Source

The AC line dropout input source simulates the shorting of the AC line source at a specific time and for a specified duration. This source is used in the LineDropout() Test Objective.

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Model Name

AC Line Dropout 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_DROPOUT

Symbols

Schematic DVM AC Line Dropout Source

AC Line Dropout 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.

PULSE_WIDTH

200u

Real

min:0

s

The duration of the line dropout in seconds.

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.

TIME_DELAY

10u

Real

min:0 s Sets the time delay before the dropout event.

Testplan Entry

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

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

AcDropout(REF, LINE_RANGE, VOLTAGE, FREQUENCY)
AcDropout(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 180°, and a time delay before the dropout event. The duration of the dropout event is set with the PULSE_WIDTH parameter. The voltage transition between the normal AC voltage and the dropout voltage is limited by the combination of the slew rate limiter and the programmable low pass filter.

 

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