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Dual-Ratio Planetary Gear
Dual-Ratio Planetary Gear component
The Dual-Ratio Planetary Gear is based on the Planetary Gear component. It has a set of two co-rotating planet gears with different radii where the first planet meshes with the sun gear and the second planet meshes with the ring gear. Both Ring/Planet(1) and Planet(2)/Sun ratios must be provided. For planets/carrier bearing damping calculations, a set of Planet(1) and Planet(2) gears is considered is one body.
Internal Structure
Internal Settings
Component
PPG
PR
,
=
Connections
Name
Condition
Description
ID
Carrier flange
carrier
Planet flange
planet
Ring
Ring flange
ring
Sun flange
sun
Conditional real output port for power loss
lossPower
Parameters
Symbol
Default
Units
-
Defines whether the component is:
true - ideal or
false - non-ideal
ideal
data source
GUI
Defines the source for the loss data:
entered via GUI [GUI]
by an attachment [attachment]
by an external file [file]
datasourcemode
true
Defines whether one efficiency data table is used for all meshing loss calculations [] or the efficiency of each meshing gear pair is given by a separate data table [].
SameMeshingEfficiency
Planet1/Sun Gear ratio
ratio1
Ring/Planet2 Gear ratio
ratio2
Number of planet gear pairs.
A planet pair consists of a set of Planet1 and Planet2 gears
numberofPlanets
same loss data = true
data source = GUI
Defines all velocity dependant meshing efficiencies.
The columns:
[ ( ( ) ( )]
Five options are available:
1 by 1 array: entered value is taken as the constant efficiency for forward and backward cases
( ) = ( ) =
1 by 2 array: first entered value is taken as the constant efficiency for forward case and the second for backward cases
( )= ( ) =
1 by 3 array: first column is ignored and the second and third values are taken as constant efficiencies for forward and backward cases, respectively
n by 2 array: 2nd column is forward and backward efficiency
() = ( ) = ( )
n by 3 array:
2nd column is forward efficiency
()
3rd column is backward efficiency
( )
meshinglossTable3
data source = attachment
Defines velocity dependant meshing efficiency
First column is angular velocity ()
(See below)
data3
data source = file
fileName3
data source = attachment or file
Defines the corresponding data columns used for forward efficiency () and backward efficiency ( )
Two options are available:
1 by 1 array:
Data column corresponding to the column number is used for both forward and backward efficiency (
1 by 2 array:
Data column corresponding to the first column number is used for forward efficiency (
and data column corresponding to the second column number is used for backward efficiency (
columns3
same loss data = false
Defines Ring/Planet2 velocity dependant meshing efficiency as a function of .
The columns are:
[ ( ) ( )]
First column is angular velocity of the ring gear w.r.t. the carrier ()
( ) = =
( ) =( ) =
1 by 3 array: first column is ignored and the second and third values are taken as constant efficiencies for forward and backward cases, respectively.
n by 2 array: Second column is forward and backward efficiency
( ) = ( ) = ( )
Second column is forward efficiency
Third column is backward efficiency
meshinglossTable1
Defines the velocity dependent meshing efficiency
First column is angular velocity ( )
data1
fileName1
Defines the corresponding data columns used for forward efficiency () and backward efficiency ()
Data column corresponding to the first column number is used for forward efficiency () and Data column corresponding to the second column number is used for backward efficiency ()
columns1
Defines Planet1/Sun velocity dependant meshing efficiency as a function of .
[ (( ) ( )]
First column is angular velocity of the sun gear w.r.t. carrier ()
meshinglossTable2
data2
fileName2
Defines the corresponding data columns used for forward () and backward () efficiency
Data column corresponding to the first column number is used for forward efficiency () and
Data column corresponding to the second column number is used for backward efficiency ()
columns2
d
0
Linear damping in planets/carrier bearings
smoothness
Table points are linearly interpolated
Defines the smoothness of table interpolation
There are two options:
Table points are interpolated such that the first derivative is continuous
See Also
MapleSim Driveline Library Overview
MapleSim Library Overview
1-D Mechanical Overview
Planetary Gear Sets
Counter Rotating Planetary Gear
Planet Planet Gear
Planet Ring Gear
Download Help Document