Squirrel Cage Induction Machine (Obsolete)

 Motor Name

Text

Just an identifier.  A name should be entered here to avoid compilation warnings

Data Generation/ Entry

Choice

Enter Typical, Explicit or EMTP Type 40 data entry format.  See Data Generation/Entry for more details

Multi-mass Interface

Choice

Select Enable or Disable.  See Interfacing to the Multi-Mass Torsional Shaft for more details

Number of Coherent Machines

REAL

Literal

Enter the number of machines acting coherently.  See Coherent Machines for more details

Number of Sub-Iteration Steps

INTEGER

Constant

Enter a number to specify the number of sub-iterations per main time step.  Increase this number if you have convergence problems.  The default value of 1 is normally adequate

Rated RMS Phase Voltage

REAL

Constant

Enter the line-to-neutral, RMS rated voltage of the machine [kV]

Rated RMS Phase Current

REAL

Constant

Enter the RMS rated line current of the machine [kA]

Base Angular Frequency

REAL

Constant

Enter the machine base angular frequency [rad/s]

Graphics Display

Choice

Select 3-Phase View or Single Line View

 Data from a machine whose horse power is

REAL

Constant

Enter the horse power of a machine. Per-unit data from a library should be selected typical to a machine of the size specified [hp]

 Mutual Saturation

Choice

Select Enabled or Disabled.  See Magnetizing (main) Saturation Curve for more details

Leakage Saturation

Choice

Select Enabled or Disabled.  See Leakage Saturation Curve for more details

Stator Resistance

REAL

Constant

Enter the stator winding resistance [pu]

First Cage Resistance

REAL

Constant

Enter the 1st rotor cage resistance [pu]

Second Cage Resistance

REAL

Constant

Enter the 2nd rotor cage resistance [pu]

Stator Unsaturated Leakage Reactance

REAL

Constant

Enter the stator leakage reactance [pu]

Unsaturated Magnetizing

Reactance

REAL

Constant

Enter the stator main reactance [pu]

Rotor Unsaturated Mutual Reactance

REAL

Constant

Enter the mutual reactance between the two rotor cages [pu]

Second Cage Unsaturated Reactance

REAL

Constant

Enter the second cage leakage reactance [pu]

Polar Moment of Inertia (J=2H)

REAL

Constant

Mechanical Damping

REAL

Constant

Enter the mechanical damping to compensate for friction and windage loss [pu]

 Design Ratio

REAL

Constant

The reactance/resistance values of the two rotor cages are derived based from this ratio [pu]

Power Factor at Rated Load

REAL

Constant

Enter the power factor at rated load [pu]

Efficiency at Rated Load

REAL

Constant

Enter the efficiency at rated load [pu]

Slip at Full Load

REAL

Constant

Enter the slip at full load [pu]

Minimum Extinction Time

REAL

Constant

Enter the power factor at rated load [pu]

Starting Current at Full Volts

REAL

Constant

Enter the starting current at full volts [pu]

Starting Torque at Full Volt / Full Load Torque

REAL

Constant

Enter the starting full load torque [pu]

Maximum Torque / Full Load Torque

REAL

Constant

Enter the maximum full load torque [pu]

Number of Poles

INTEGER

Constant

Enter the number of stator poles

Polar Moment of Inertia (J)

REAL

Constant

The units are [kgm2] or [MWs/MVA] depending on Units of the Inertia below.

Units of the Inertia

Choice

Select either kgm2 or s.

Mechanical Damping

REAL

Constant

Enter the mechanical damping to compensate for friction and windage loss [pu]

 Point # - Magnetizing Current

REAL

Constant

Enter the current points of the magnetizing curve [pu]

Point # - Magnetizing Voltage

REAL

Constant

Enter the voltage points of the magnetizing curve [pu]

Point # -  

Short Circuit Current

REAL

Constant

Enter the current points of the leakage saturation curve [pu]

Point # -  

Short Circuit Voltage

REAL

Constant

Enter the voltage points of the leakage saturation curve [pu]

Name for Real Power (+=in) (pu)

REAL

Output

Enter a name for machine real power [pu]

Name for Reactive Power (+=in) (pu)

REAL

Output

Enter a name for machine reactive power [pu]

Name for Output Rotor Angle (rad)

REAL

Output

Enter a name for rotor angle [rad]

Name for Output Mechanical Torque (pu)

REAL

Output

Enter a name for mechanical torque [pu]

Name for Output Speed (pu)

REAL

Output

Enter a name for output speed [pu]

Name for Electrical Torque (pu)

REAL

Output

Enter a name for electrical torque [pu]

Name for Torque Angle (rad)

REAL

Output

Enter a name for the machine torque angle [rad]

Name for Slip Angle (rad)

REAL

Output

Enter a name for the machine slip angle [rad]

Name for Mutual Saturation Factor

REAL

Output

Enter a name for the machine mutual saturation factor

Name for Leakage Saturation Factor

REAL

Output

Enter a name for Leakage Saturation Factor