DC_SeriesExcited

Series excited linear DC machine

DC_SeriesExcited

Library

Electrical/Machines/BasicMachines/DCMachines

Description

Model of a DC Machine with series excitation.
Armature resistance and inductance are modeled directly after the armature pins, then using a AirGapDC model.
The machine models take the following loss effects into account:

heat losses in the temperature dependent armature winding resistance
heat losses in the temperature dependent excitation winding resistance
brush losses in the armature circuit
friction losses
core losses (only eddy current losses, no hysteresis losses)
stray load losses

No saturation is modelled.
Series excitation has to be connected by the user's external circuit.
Default values for machine's parameters (a realistic example) are:

stator's moment of inertia	0.29	kg.m2
rotor's moment of inertia	0.15	kg.m2
nominal armature voltage	100	V
nominal armature current	100	A
nominal torque	63.66	Nm
nominal speed	1410	rpm
nominal mechanical output	9.4	kW
efficiency	94.0	% only armature
armature resistance	0.05	Ohm at reference temperature
reference temperature TaRef	20	°C
temperature coefficient alpha20a	0	1/K
armature inductance	0.0015	H
excitation resistance	0.01	Ohm at reference temperature
reference temperature TeRef	20	°C
temperature coefficient alpha20e	0	1/K
excitation inductance	0.0005	H
stray part of excitation inductance	0
armature nominal temperature TaNominal	20	°C
series excitation nominal temperature TeNominal	20	°C
armature operational temperature TaOperational	20	°C
series excitation operational temperature TeOperational	20	°C

Armature resistance resp. inductance include resistance resp. inductance of commutating pole winding and compensation winding, if present.
Parameter nominal armature voltage includes voltage drop of series excitation;
but for output the voltage is split into:
va = armature voltage without voltage drop of series excitation
ve = voltage drop of series excitation

Parameters

DC_SeriesExcited_0

Name	Label	Description	Data Type	Valid Values
mo_TaOperational	TaOperational	Operational armature temperature	Scalar
mo_Jr	Jr	Rotor's moment of inertia	Scalar
mo_useSupport	useSupport	Enable / disable (=fixed stator) support	Number	0 1
mo_Js	Js	Stator's moment of inertia	Scalar
mo_useThermalPort	useThermalPort	Enable / disable (=fixed temperatures) thermal port	Number	0 1
mo_pi	pi		Scalar
mo_quasiStationary	quasiStationary	No electrical transients if true	Scalar	true false
mo_ViNominal	ViNominal	Nominal induced Voltage	Scalar
mo_psi_eNominal	psi_eNominal	Nominal magnetic flux	Scalar
mo_turnsRatio	turnsRatio	Ratio of armature turns over number of turns of the excitation winding	Scalar
mo_TeOperational	TeOperational	Operational series excitation temperature	Scalar
mo_Lme	Lme	Main part of excitation inductance	Scalar
mo_Lesigma	Lesigma	Stray part of excitation inductance	Scalar

DC_SeriesExcited_1

Name	Label	Description	Data Type
mo_VaNominal	VaNominal	Nominal armature voltage	Scalar
mo_IaNominal	IaNominal	Nominal armature current (>0..Motor, <0..Generator)	Scalar
mo_wNominal	wNominal	Nominal speed	Scalar
mo_TaNominal	TaNominal	Nominal armature temperature	Scalar
mo_TeNominal	TeNominal	Nominal series excitation temperature	Scalar

DC_SeriesExcited_2

Name	Label	Description	Data Type
mo_Ra	Ra	Armature resistance at TRef	Scalar
mo_TaRef	TaRef	Reference temperature of armature resistance	Scalar
mo_alpha20a	alpha20a	Temperature coefficient of armature resistance	Scalar
mo_La	La	Armature inductance	Scalar

DC_SeriesExcited_3

Name	Label	Description	Valid Values
mo_frictionParameters	frictionParameters	Friction loss parameter record	FromModelica('Modelica.Electrical.Machines.Losses.FrictionParameters')
mo_coreParameters	coreParameters	Armature core loss parameter record	FromModelica('Modelica.Electrical.Machines.Losses.CoreParameters')
mo_strayLoadParameters	strayLoadParameters	Stray load loss parameter record	FromModelica('Modelica.Electrical.Machines.Losses.StrayLoadParameters')
mo_brushParameters	brushParameters	Brush loss parameter record	FromModelica('Modelica.Electrical.Machines.Losses.BrushParameters')

DC_SeriesExcited_4

Name	Label	Description	Data Type
mo_Re	Re	Series excitation resistance at TRef	Scalar
mo_TeRef	TeRef	Reference temperature of excitation resistance	Scalar
mo_alpha20e	alpha20e	Temperature coefficient of excitation resistance	Scalar
mo_Le	Le	Total field excitation inductance	Scalar
mo_sigmae	sigmae	Stray fraction of total excitation inductance	Scalar

DC_SeriesExcited_5

Name	Label	Description	Data Type	Valid Values
mo_phiMechanical	phiMechanical	phiMechanical	Structure
mo_phiMechanical/fixed	fixed		Cell of scalars	true false
mo_phiMechanical/start	start		Cell of scalars
mo_wMechanical	wMechanical	wMechanical	Structure
mo_wMechanical/fixed	fixed		Cell of scalars	true false
mo_wMechanical/start	start		Cell of scalars
mo_tauElectrical	tauElectrical	tauElectrical	Structure
mo_tauElectrical/fixed	fixed		Cell of scalars	true false
mo_tauElectrical/start	start		Cell of scalars
mo_tauShaft	tauShaft	tauShaft	Structure
mo_tauShaft/fixed	fixed		Cell of scalars	true false
mo_tauShaft/start	start		Cell of scalars
mo_va	va	va	Structure
mo_va/fixed	fixed		Cell of scalars	true false
mo_va/start	start		Cell of scalars
mo_ia	ia	ia	Structure
mo_ia/fixed	fixed		Cell of scalars	true false
mo_ia/start	start		Cell of scalars
mo_ve	ve	ve	Structure
mo_ve/fixed	fixed		Cell of scalars	true false
mo_ve/start	start		Cell of scalars
mo_ie	ie	ie	Structure
mo_ie/fixed	fixed		Cell of scalars	true false
mo_ie/start	start		Cell of scalars

Ports

Name	Type	Description	IO Type	Number
flange	implicit	Shaft	input	1
pin_ap	implicit	Positive armature pin	input	2
pin_an	implicit	Negative armature pin	output	1
pin_ep	implicit	Positive series excitation pin	input	3
pin_en	implicit	Negative series excitation pin	output	2
Port 6	implicit	Support at which the reaction torque is acting	input	mo_useSupport
Port 7	implicit		input	mo_useThermalPort

DC_SeriesExcited

Library

Description

Parameters

Ports

See Also