Free Load Torques; No Load Running Torque - Harmonic Drive CSD-2A Component Sets Engineering Data

4.4 Free Load Torques

No Load Running Torque

The no load running torque is the torque required to maintain rotation of the input element (high speed side) at a defined input
speed with no load applied to the output.
No Load Starting Torque
The no load starting torque is the quasistatic torque required to commence rotation of the input element (high speed side)
with no load applied to the output element (low speed side).
No Load Back Driving Torque
The no load back driving torque is the torque required to commence rotation of the output element (low speed side) with
no load applied to the input element (high speed side). The approximate range for no load back driving torque, based on
tests of actual production gears, is shown in following table. In no case should the values given be regarded as a margin
in a system that must hold an external load. Where back driving is not permissible a brake must be fitted.
The curves in illustration 26.1 are valid for: Harmonic Drive® grease, standard lubricant quantity
Gear ratio i = 100 For other ratios please apply the compensation values given in table 27.1.
For oil lubrication please contact Harmonic Drive AG.
4.4.1 No Load Running Torque
Illustration 26.1
Input Speed = 500 rpm
10000
1000
100
10
1
0,1
-10 0 10
Temperature [°C]
Input Speed = 2000 rpm
10000
1000
100
10
1
0,1
-10 0 10
Temperature [°C]
26
Size
50
40
32
25
20
17
14
20 30 40
Size
50
40
32
25
20
17
14
20 30 40
Input Speed = 1000 rpm
10000
1000
100
10
1
0,1
-10 0 10
Temperature [°C]
Input Speed = 3500 rpm
10000
1000
100
10
1
0,1
-10 0 10
Temperature [°C]
Size
50
40
32
25
20
17
14
20 30 40
Size
50
40
32
25
20
17
14
20 30 40
1019659 11/2014