WOLFRAM SYSTEMMODELER

Core

Model of core losses

Wolfram Language

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SystemModel["Modelica.Electrical.Machines.Losses.DCMachines.Core"]
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Information

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

Core losses can be separated into eddy current and hysteresis losses. The total core losses can thus be expressed as

  p = PRef * (ratioHysteresis * (wRef / w) + 1 - ratioHysteresis) * (v / VRef)^2

where w is the actual angular velocity and v is the actual voltage. The term ratioHysteresis is the ratio of the hysteresis losses with respect to the total core losses for reference inner voltage and reference angular velocity.

For the voltage and angular velocity range with respect to Fig. 1, the dependency of total core losses on the parameter ratioHysteresis is depicted in Fig. 2.

corelossesVw.png
Fig. 1: Voltage versus angular velocity
corelossesPcw.png
Fig. 2: Core losses versus angular velocity with parameter ratioHysteresis

Note

In the current implementation it is assumed that ratioHysteresis = 0. This parameter cannot be changed due to compatibility reasons.

See also

Core loss parameters

Connectors (3)

p

Type: PositivePin

Description: Positive pin (potential p.v > n.v for positive voltage drop v)

n

Type: NegativePin

Description: Negative pin

heatPort

Type: HeatPort_a

Description: Optional port to which dissipated losses are transported in form of heat

Parameters (2)

useHeatPort

Value: false

Type: Boolean

Description: =true, if heatPort is enabled

coreParameters

Value:

Type: CoreParameters

Description: Armature core losses

Components (1)

coreParameters

Type: CoreParameters

Description: Armature core losses

Used in Components (7)

DC_PermanentMagnet

Permanent magnet DC machine

DC_ElectricalExcited

Electrical shunt/separate excited linear DC machine

DC_SeriesExcited

Series excited linear DC machine

DC_PermanentMagnet

Quasistationary permanent magnet DC machine

DC_ElectricalExcited

Quasistationary electrical shunt/separate excited linear DC machine

DC_SeriesExcited

Quasistationary series excited linear DC machine

PartialBasicDCMachine

Partial model for DC machine