The ACIM machine model and its associated Hardware Configurations have been archived.  If starting a new project, consider using the SCIM Machine Model instead.

The AC Induction Machine model implements a three-phase induction machine (asynchronous machine) with a resolver, encoder, and hall effect sensor.

ACIM Configuration Page

In the System Explorer window configuration tree, expand the Power Electronics Add-On custom device and select Circuit Model >> ACIM to display this page.  Use this page to configure the ACIM machine model. Additional information about the model can be found in the National Instruments Help page for the ACIM Constant Parameter Model VI.

This page includes the following components:

AC Induction Machine Model Settings
NameSpecifies the name of the machine model.
DescriptionSpecifies a description for the machine model.
Motor Configuration

SymbolUnitsDefaultDescription
Magnetizing InductanceLmHenries0.0462Specifies the magnetizing inductance of the motor.
Stator Leakage InductanceLlsHenries0.00194Stator winding leakage inductance.  This value must be greater than 0.
Rotor Leakage Inductance

Llr

Henries0.00245Rotor winding leakage inductance.  This value must be greater than 0.
Stator ResistanceRsOhms0.896Stator winding resistance. This value must be greater than 0.
Rotor ResistanceRrOhms1.82Rotor winding resistance. This value must be greater than 0.
Loop TimeTsSeconds9E-7

Describes the timestep of the machine model.


Pole PairsPP
2

Number of machine pole pairs.

Mechanical Model Parameters

SymbolUnitsDefaultDescription
Inertia
kgm20.000225

Moment of inertia of the electric motor.  This value must be equal to or greater than 0.

Friction Coefficient

0Friction coefficient of the electric motor.  This value must be equal to or greater than 0.
Temperature Correction Parameters

SymbolUnitsDefaultDescription
Base TemperatureTbaseKelvin298.15

Base temperature for the stator resistance and the rotor resistance. This value must be greater than 0.

Stator Temperature Coefficientks1/Kelvin0.00393Coefficient for temperature correction of the stator resistance. This value must be greater than 0.
Rotor Temperature Coefficientkr1/Kelvin0.00393Coefficient for temperature correction of the rotor resistance. This value must be greater than 0.
Input Mapping Configuration
Use the Input Mapping Configuration to route signals to the Voltage Phase A, Voltage Phase B, and Voltage Phase C inputs of the machine model.  Available routing options may vary depending on the selected Hardware Configuration.

Group

Specifies the group that will be routed to the input voltages of the machine. The available routing options are defined by the selected Hardware Configuration, however it is typical to see the following options by default:

  • Measurements - eHS circuit model measurements

Element

Specifies the index of the measurement in the group that has been selected as the input voltage of the machine.


ACIM Section Channels

This section includes the following custom device channels:

Channel Name

Type

Units

Default Value

Description

EnableInput
0

Set this channel to one of the following values:

  • 0 - Disables the machine model.
  • 1 - Enables the machine model.
Load TorqueInputNewton Meters0NmTorque applied to the shaft of the machine.
Rotor TemperatureInputKelvin298.15KTemperature of the motor rotor. If this value is greater than 0, Temperature Correction is performed for the Stator Resistance and the Rotor Resistance.
Stator TemperatureInputKelvin298.15KTemperature of the motor stator. If this value is greater than 0, Temperature Correction is performed for the Stator Resistance and the Rotor Resistance.
VaOutputVolts0VPhase A voltage of the electric motor.
VbOutputVolts0VPhase B voltage of the electric motor.
VcOutputVolts0VPhase C voltage of the electric motor.
IaOutputAmperes0APhase A current of the electric motor.
IbOutputAmperes0APhase B current of the electric motor.
IcOutputAmperes0APhase C current of the electric motor.
Electromagnetic TorqueOutputNewton Meters0NmElectromagnetic torque of the electric motor.
SpeedOutputRPM0RPMRotor speed of the electric motor.
PositionOutputRadians0radRotor position of the electric motor.

ACIM Model Description

For a full description of the ACIM model and its parameters, please see the National Instruments Help pages at the links below: