Description of the motors
2.3 Derating factors
S-1FK7 DYA G2 synchronous motors with planetary gearbox
Operating Instructions, 05/2018, A5E44881183B AA
29
Table 2- 6
Factors for reducing the maximum DC-link voltage
Installation altitude up to [m] above mean sea
level
Factor
2000
1
3000
0.877
4000
0.775
5000
0.656
6000
0.588
7000
0.513
8000
0.444
As the DC-link voltage is reduced, the converter output voltage also decreases. This reduces
the operating range in the M-n diagram.
Operation in a vacuum is not permissible because of the low dielectric strength and poor
heat dissipation.
Change to the S1 characteristic when a gearbox is mounted
Determine the S1 motor characteristic when a gearbox is mounted using the following
formula:
S1
gearbox
= S1
100K
- (S1
100K
- S1
60K
) / 2
The S1(100K) and S1(60K) characteristics are provided in the M-n diagrams in the
Configuration Manual for the 1FK7 G2.
