Leakage Around Poles - MapleSim Help

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Leakage Around Poles

 

Description

Connections

Variables

Parameters

Initial Conditions

See Also

Description

The Leakage around Poles component models the leakage magnetic flux around a prismatic air-gap between two poles.  It models the radius of the leakage field, r, as a constant parameter, independent of the length of the air-gap, l.

The equations are

Vm=ΦRm

Φp+Φn=0

Φ Φp

Rm=1Gm

Gm=μ0wπln1+πrl

 

f=Fm

Fm=12Vm2ⅆGmⅆx

ⅆGmⅆx=μ0wrl21+πrlⅆldx

s=l

s=flangessupports

 

Connections

Name

Description

Color

portp

Positive magnetic port

Solid orange

portn

Negative magnetic port

Open orange

flange

Armature connection

Open green

support

Conditional Support Flange

Solid green

Variables

Symbol

Units

Description

Modelica ID

Vm

A

Magnetic potential across component        

V_m

Vmx

A

Magnetic potential at portx, x p,n

port_x.V_m

Φx

Wb

Magnetic flux into portx, x p,n

port_x.Phi

Φ

Wb

Magnetic flux through component

Phi

Rm

H1

Magnetic reluctance

Rm

Gm

H

Magnetic permeance

Gm

f

N

force on flange

flange.f

Fm

N

Reluctance force

F_m

l

m

Axial length (separation of air-gap)

l    

s

m

Position of flange

s

Parameters

Symbol

Default

Units

Description

Modelica ID

w

0.1

m

Width orthogonal to flux    

w

r

0.01

m

Radius of leakage field

r

dldx

+1

integer

Derivative of flux tube's varying dimension with respect to the armature position. Set to +1 or -1.

dlBydx

useSupport

false

boolean

Enables conditional support flange

support

Initial Conditions

Symbol

Units

Description

Modelica ID

Vm0

A

Magnetic potential across component        

V_m

Φ0

Wb

Magnetic flux through component

Phi

Rm0

H1

Magnetic reluctance

Rm

Gm0

H

Magnetic permeance

Gm

dGmdxy|x0

Hm

Initial change of permeance with length

dGmBydx

Fm0

N

Initial reluctance force

F_m

l0

m

Initial length of air gap

l

s0

m

Initial position of flange

s

See Also

Reluctance Force Flux Tubes

Magnetic Library Overview

The components described in this topic are from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

 

 

 

 

 


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