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DC Permanent Magnet

Permanent magnet DC machine

 

Description

Variables

Connections

Parameters

Modelica Standard Library

Description

The quasistationary DC Permanent Magnet component models a DC Machine with permanent magnets. This model is fully compatible with the regular DC Permanent Magnet model; the only difference is that electrical transients are neglected.

Variables

Name

Units

Description

Modelica ID

phiMechanical

rad

Mechanical angle of rotor against stator

phiMechanical

wMechanical

rads

Mechanical angular velocity of rotor against stator

wMechanical

tauElectrical

Nm

Electromagnetic torque

tauElectrical

tauShaft

Nm

Shaft torque

tauShaft

inertiaRotor

 

 

inertiaRotor

inertiaStator

 

 

inertiaStator

fixed

 

 

fixed

friction

 

 

friction

va

V

Armature voltage

va

ia

A

Armature current

ia

ra

 

 

ra

la

 

 

la

brush

 

 

brush

core

 

 

core

strayLoad

 

 

strayLoad

thermalAmbient

 

 

thermalAmbient

airGapDC

 

 

airGapDC

eGround

 

 

eGround

ie

 

 

ie

[1] flangeφinternalSupportφ

[2] inertiaRotorflangeaτ

Connections

Name

Description

Modelica ID

flange

Shaft

flange

pinan

Negative armature pin

pin_an

pinap

Positive armature pin

pin_ap

support

Support at which the reaction torque is acting

support

thermalPort

Optional thermal port

thermalPort

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

Jr

 

kgm2

Rotor moment of inertia

Jr

Js

 

kgm2

Stator moment of inertia

Js

Ta,oper

 

K

Operational armature temperature

TaOperational

Use Support Flange

false

 

True (checked) means enable stator support

useSupport

Use Thermal Port

false

 

True (checked) means thermal port is enabled

useThermalPort

Brush Losses

Name

Default

Units

Description

Modelica ID

V

0

V

Total voltage drop of brushes, if ibrush>Ilinear

V

Ilinear

0.01Ianom

A

Current indicating linear voltage region of brush voltage drop

ILinear

See Brush for details of the brush loss model.

Core Losses

Name

Default

Units

Description

Modelica ID

Pref

0

W

Reference rotor core losses

PRef

Vref

Vnom

V

Reference RMS voltage

VRef

ωref

ωnom

rads

Reference angular velocity

wRef

See Core for details of the core loss model.

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.

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 Parameters Parameters

Name

Default

Units

Description

Modelica ID

Ia,nom

 

A

Nominal armature current

IaNominal

ωnom

 

rads

Nominal rotational speed

wNominal

Ta,nom

 

K

Nominal armature temperature

TaNominal

Va,nom

 

V

Nominal armature voltage

VaNominal

Nominal Resistances And Inductances Parameters

Name

Default

Units

Description

Modelica ID

αa

 

1K

Temperature coefficient of armature resistance

alpha20a

La

 

H

Armature inductance

La

Ra

 

Ω

Warm armature resistance

Ra

Ta,ref

 

K

Reference temperature of armature resistance

TaRef

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

Electrical Machines Overview