SM Electrical Excited Damper Cage - MapleSim Help
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SM Electrical Excited

Electrical excited synchronous induction machine with damper cage

 

Description

Connections

Parameters

Modelica Standard Library

Description

The SM Electrical Excited component models a three-phase electrical-excited synchronous induction machine with damper cage. The resistance and stray inductance of the stator is modeled directly in stator phases, then using space phasor transformation and a rotor-fixed Air Gap model. The resistance and stray inductance of the rotor's squirrel cage is modeled in two axes of the rotor-fixed coordinate system. Electrical excitation is modeled by converting excitation current and voltage to d-axis space phasors.

The following losses are modeled:

• 

heat losses in the temperature dependent stator winding resistances

• 

heat losses in the temperature dependent excitation winding resistance

• 

optional, when enabled: heat losses in the temperature dependent damper cage resistances

• 

brush losses in the excitation circuit

• 

friction losses

• 

core losses (only eddy current losses, no hysteresis losses)

• 

stray load losses

Whether a damper cage is present or not can be selected with Boolean parameter useDamperCage (default = true).

Connections

Name

Description

Modelica ID

Shaft

flange

Negative excitation pin

pin_en

Positive excitation pin

pin_ep

Negative stator plug

plug_sn

Positive stator plug

plug_sp

Support at which the reaction torque is acting

support

Conditional heat port

thermalPort

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

50

Nominal frequency

fsNominal

0.29

Rotor moment of inertia

Jr

Stator moment of inertia

Js

2

 

Number of pole pairs (Integer)

p

293.15

Operational excitation temperature

TeOperational

293.15

Operational temperature of (optional) damper cage

TrOperational

293.15

Operational temperature of stator resistance

TsOperational

Use Support Flange

 

True (checked) means stator support is enabled

useSupport

Use Thermal Port

 

True (checked) means heat port is enabled

useThermalPort

Excitation Parameters

Name

Default

Units

Description

Modelica ID

0

Temperature coefficient of excitation resistance

alpha20e

10

Open circuit excitation current @ nominal voltage and frequency

IeOpenCircuit

2.5

Excitation resistance at TRef

Re

0.025

 

Stray fraction of total excitation inductance

sigmae

293.15

Reference temperature of excitation resistance

TeRef

100

Nominal stator RMS voltage per phase

VsNominal

Brush Losses

Name

Default

Units

Description

Modelica ID

Total voltage drop of brushes, if

V

Current indicating linear voltage region of brush voltage drop

ILinear

See Brush for details of the brush loss model.

Friction Losses

Name

Default

Units

Description

Modelica ID

Reference friction losses

PRef

Reference angular velocity

wRef

Exponent of friction

power_w

See Friction for details of the friction loss model.

Stator Core Losses

Name

Default

Units

Description

Modelica ID

Reference rotor core losses

PRef

 

Reference RMS voltage

VRef

Reference angular velocity

wRef

See Core for details of the core loss model.

Stray Load Losses

Name

Default

Units

Description

Modelica ID

Reference RMS current

IRef

Reference friction losses

PRef

Reference angular velocity

wRef

Exponent of stray load loss

power_w

See Stray Load for details of the stray load loss model.

Nominal Resistances And Inductances Parameters

Name

Default

Units

Description

Modelica ID

0

Temperature coefficient of damper resistances in d- and q-axis

alpha20r

0

Temperature coefficient of stator resistance at 20 degC

alpha20s

Main field inductance in d-axis

Lmd

Main field inductance in q-axis

Lmq

Damper stray inductance in d-axis

Lrsigmad

Damper stray inductance in q-axis

Lrsigmaq

Stator zero sequence inductance

Lszero

Stator stray inductance per phase

Lssigma;

0.04

Damper resistance in d-axis at TRef

Rrd

Damper resistance in q-axis at TRef

Rrq

0.03

Warm damper resistance in q-axis

Rs

293.15

Reference temperature of damper resistances in d- and q-axis

TrRef

293.15

Reference temperature of stator resistance

TsRef

Use Damper Cage

 

True (checked) means damper cage is enabled

useDamperCage

Modelica Standard Library

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

See Also

Electrical Library

Electrical Machines

Synchronous Induction Machines

 


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