IM Squirrel Cage - MapleSim Help
For the best experience, we recommend viewing online help using Google Chrome or Microsoft Edge.

Online Help

All Products    Maple    MapleSim


IM_Squirrel Cage

Induction machine with squirrel cage rotor

 

Description

Connections

Parameters

Modelica Standard Library

Description

The IM_Squirrel Cage (or IM Squirrel Cage) component models a three phase induction machine with a squirrel cage. The resistance and stray inductance of the stator is modeled directly in stator phases, then using space phasor transformation. The resistance and stray inductance of the rotor's squirrel cage is modeled in two axis of the rotor-fixed coordinate system. Both are connected together via a stator-fixed Air Gap model.

The following losses are modeled:

• 

heat losses in the temperature dependent stator winding resistances

• 

heat losses in the temperature dependent cage resistances

• 

friction losses

• 

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

• 

stray load losses

Connections

Name

Description

Modelica ID

flange

Shaft

flange

plugsn

Negative stator plug

plug_sn

plugsp

Positive stator plug

plug_sp

support

Support at which the reaction torque is acting

support

thermalPort

 

thermalPort

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

fs,nom

50

Hz

Nominal frequency

fsNominal

Jr

0.29

kgm2

Rotor moment of inertia

Jr

Js

J[r]

kgm2

Stator moment of inertia

Js

p

2

 

Number of pole pairs (Integer)

p

Tr,oper

293.15

K

Operational temperature of rotor resistance

TrOperational

Ts,oper

293.15

K

Operational temperature of stator resistance

TsOperational

Use Support Flange

false

 

True (checked) means enable stator support flange

useSupport

Use Thermal Port

false

 

True (checked) means thermal port is enabled

useThermalPort

Friction Losses

Name

Default

Units

Description

Modelica ID

Pref

0

W

Reference friction losses

PRef

ωref

ωnom

rads

Reference angular velocity

wRef

pω

2

V

Exponent of friction

power_w

See Friction for details of the friction loss model.

Stator Core Losses

Name

Default

Units

Description

Modelica ID

Pref

0

W

Reference rotor core losses

PRef

Vref

 

V

Reference RMS voltage

VRef

ωref

2πfs,nom

rads

Reference angular velocity

wRef

See Core for details of the core loss model.

Stray Load Losses

Name

Default

Units

Description

Modelica ID

Iref

Ianom

W

Reference RMS current

IRef

Pref

0

W

Reference friction losses

PRef

ωref

ωnom

rads

Reference angular velocity

wRef

pω

1

V

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

αr

0

1K

Temperature coefficient of rotor resistance at 20 degC

alpha20r

αs

0

1K

Temperature coefficient of stator resistance at 20 degC

alpha20s

Lm

[1]

H

Main field inductance

Lm

Lrσ

[1]

H

Rotor stray inductance per phase

Lrsigma

Lsσ

[1]

H

Stator stray inductance per phase

Lssigma

Ls,0

Lsσ

H

Stator zero sequence inductance

Lszero

Rr

0.04

Ω

Warm rotor resistance per phase

Rr

Rs

0.03

Ω

Warm stator resistance per phase

Rs

Tr,ref

293.15

K

Reference temperature of rotor resistance

TrRef

Ts,ref

293.15

K

Reference temperature of stator resistance

TsRef

[1] 1.510.9333πfs,nom

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

Induction Machines