DC_PermanentMagnet

Permanent magnet DC machine

Diagram

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Model of a DC Machine with permanent magnets.
Armature resistance and inductance are modeled directly after the armature pins, then using a AirGapDC model. Permanent magnet excitation is modelled by a constant equivalent excitation current feeding AirGapDC. The machine models take the following loss effects into account:

heat losses in the temperature dependent armature 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.
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 speed	1425	rpm
nominal torque	63.66	Nm
nominal mechanical output	9.5	kW
efficiency	95.0	%
armature resistance	0.05	Ohm at reference temperature
reference temperature TaRef	20	°C
temperature coefficient alpha20a	0	1/K
armature inductance	0.0015	H
armature nominal temperature TaNominal	20	°C
armature operational temperature TaOperational	20	°C

Armature resistance resp. inductance include resistance resp. inductance of commutating pole winding and compensation winding, if present.

Parameters (18)

Jr	Value: Type: Inertia (kg·m²) Description: Rotor's moment of inertia
useSupport	Value: false Type: Boolean Description: Enable / disable (=fixed stator) support
Js	Value: Jr Type: Inertia (kg·m²) Description: Stator's moment of inertia
useThermalPort	Value: false Type: Boolean Description: Enable / disable (=fixed temperatures) thermal port
frictionParameters	Value: Type: FrictionParameters Description: Friction loss parameter record
TaOperational	Value: Type: Temperature (K) Description: Operational armature temperature
VaNominal	Value: Type: Voltage (V) Description: Nominal armature voltage
IaNominal	Value: Type: Current (A) Description: Nominal armature current (>0..Motor, <0..Generator)
wNominal	Value: Type: AngularVelocity (rad/s) Description: Nominal speed
TaNominal	Value: Type: Temperature (K) Description: Nominal armature temperature
Ra	Value: Type: Resistance (Ω) Description: Armature resistance at TaRef
TaRef	Value: Type: Temperature (K) Description: Reference temperature of armature resistance
alpha20a	Value: Type: LinearTemperatureCoefficient20 (¹/K) Description: Temperature coefficient of armature resistance
La	Value: Type: Inductance (H) Description: Armature inductance
coreParameters	Value: Type: CoreParameters Description: Armature core loss parameter record
strayLoadParameters	Value: Type: StrayLoadParameters Description: Stray load loss parameter record
brushParameters	Value: Type: BrushParameters Description: Brush loss parameter record
TpmOperational	Value: 293.15 Type: Temperature (K) Description: Operational temperature of permanent magnet

Outputs (7)

phiMechanical	Default Value: flange.phi - internalSupport.phi Type: Angle (rad) Description: Mechanical angle of rotor against stator
wMechanical	Default Value: der(phiMechanical) Type: AngularVelocity (rad/s) Description: Mechanical angular velocity of rotor against stator
tauElectrical	Default Value: inertiaRotor.flange_a.tau Type: Torque (N·m) Description: Electromagnetic torque
tauShaft	Default Value: -flange.tau Type: Torque (N·m) Description: Shaft torque
powerBalance	Type: PowerBalanceDCPM Description: Power balance
va	Default Value: pin_ap.v - pin_an.v Type: Voltage (V) Description: Armature voltage
ia	Default Value: pin_ap.i Type: Current (A) Description: Armature current

Connectors (5)

	flange	Type: Flange_a Description: Shaft
	support	Type: Flange_a Description: Support at which the reaction torque is acting
	pin_ap	Type: PositivePin Description: Positive armature pin
	pin_an	Type: NegativePin Description: Negative armature pin
	thermalPort	Type: ThermalPortDCPM

Components (18)

	frictionParameters	Type: FrictionParameters Description: Friction loss parameter record
	inertiaRotor	Type: Inertia
	inertiaStator	Type: Inertia
	fixed	Type: Fixed
	friction	Type: Friction
	coreParameters	Type: CoreParameters Description: Armature core loss parameter record
	strayLoadParameters	Type: StrayLoadParameters Description: Stray load loss parameter record
	brushParameters	Type: BrushParameters Description: Brush loss parameter record
	powerBalance	Type: PowerBalanceDCPM Description: Power balance
	ra	Type: Resistor
	la	Type: InductorDC
	brush	Type: Brush
	core	Type: Core
	strayLoad	Type: StrayLoad
	thermalAmbient	Type: ThermalAmbientDCPM
	airGapDC	Type: AirGapDC
	eGround	Type: Ground
	ie	Type: ConstantCurrent

Used in Examples (9)

	DCPM_Start Modelica.Electrical.Machines.Examples.DCMachines Test example: DC with permanent magnet starting with voltage ramp
	DCPM_CurrentControlled Modelica.Electrical.Machines.Examples.DCMachines Test example: DC with permanent magnet starting with current controller
	DCPM_Temperature Modelica.Electrical.Machines.Examples.DCMachines Test example: Investigate temperature dependency of a DCPM motor
	DCPM_Cooling Modelica.Electrical.Machines.Examples.DCMachines Test example: Cooling of a DCPM motor
	DCPM_QuasiStatic Modelica.Electrical.Machines.Examples.DCMachines Test example: Compare DCPM motors transient - quasi-static
	DCPM_withLosses Modelica.Electrical.Machines.Examples.DCMachines Test example: Investigate influence of losses on DCPM motor performance
	ThyristorBridge2Pulse_DC_Drive Modelica.Electrical.PowerConverters.Examples.ACDC.RectifierBridge2Pulse Two pulse Graetz thyristor bridge feeding a DC drive
	ThyristorBridge2mPulse_DC_Drive Modelica.Electrical.PowerConverters.Examples.ACDC.RectifierBridge2mPulse 2*m pulse thyristor bridge feeding a DC drive
	HBridge_DC_Drive Modelica.Electrical.PowerConverters.Examples.DCDC.HBridge H bridge DC/DC converter with DC drive

Used in Components (1)

PartialControlledDCPM

Modelica.Electrical.Machines.Examples.ControlledDCDrives.Utilities

Partial controlled DC PM drive with H-bridge from battery

Extended by (1)

DC_PermanentMagnet

Modelica.Electrical.Machines.BasicMachines.QuasiStaticDCMachines

Quasi-static permanent magnet DC machine