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QuasiStatic Stray Load

Source with signal magnetic potential difference

 

Description

Equations

Connections

Parameters

Modelica Standard Library

Description

The QuasiStatic Stray Load component models the effect of current-dependent torque losses.

Stray load losses are modeled similar to standards EN 60034-2 and IEEE 512, i.e., they are dependent on square of current, but without scaling them to zero at no-load current. The stray load losses are modeled such way that they do not cause a voltage drop in the electric circuit; instead, the losses are dissipated through a braking torque at the shaft.

Equations

τ=τsupport=τflange=PrefwrefiRMSIref2{0Pref0sgnwwwrefPwotherwise

w=dφdt

φ=φflangeφsupport

i=ip=in

v=vpvn

lossPower=τw

ω=dγpdt

γp=γ+γn

Connections

Name

Description

Modelica ID

plugp

Positive quasistationary multiphase plug

plug_p

plugn

Negative quasistationary multiphase plug

plug_n

flange

Rotational shaft end

flange

support

Housing and support

support

heatPort

Conditional heat port

heatPort

Parameters

Name

Default

Units

Description

Modelica ID

m

3

 

Number of phases

m

Use Heat Port

false

 

True (checked) means enable heat port

useHeatPort

Stray Load Losses

Name

Default

Units

Description

Modelica ID

Pref

1

W

Reference power loss

PRef

Iref

1

A

Reference current

IRef

wref

1

rads

Reference angular velocity

wRef

Pw

1

1

Exponent of angular velocity

power_w

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

Magnetic Quasistatic Fundamental Wave Losses

Magnetic Quasistatic Fundamental Wave Overview

Magnetics Library