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Derating

Servo amplifiers

A derating may be necessary due to high environment temperature or due to operation in high locations. Current values are affected.

No derating for servo amplifiers with standard clock frequency, up to 1000m a.m.s.l. and with max. 40°C ambient temperature.

Derating 40°C ... 55°C (%/K) 1000-2500m a.m.s.l. @ 40°C (%/100m) @ 16kHz clock frequency (%)
S300  2,5 1,5 40
S400  2,5 1,5 30
S601...620  2,5 1,5 30
S640/670  2,5 1,5 -
S701...724  2,5 1,5 -
S748/772  2,5 1,5 40
AKD  4 1,5 -

Servo motors

A derating may be necessary due to high environment temperature or due to operation in high locations. Some motor types need derating due to built-in encoders and brakes. Standstill current and standstill torque values are affected.

No derating for motors with resolver, up to 1000m a.m.s.l., with max. 40°C ambient temperature and max. 65°C flange temperature.

Derating 40°C ... 50°C

(%/K)
1000-2000m
a.m.s.l. @ 40°C
(%)
2000-3000m
a.m.s.l. @ 40°C
(%)
3000-4000m
a.m.s.l. @ 40°C
(%)
4000-5000m
a.m.s.l. @ 40°C
(%)
Resolver

(%)
Resolver and
Brake
(%)
Encoder

(%)
Encoder and
Brake
(%)
AKM1  1 6 17 30 55 0 0 5 -
AKM2  1 6 17 30 55 0 0 5 9
AKM3  1 6 17 30 55 0 0 5 7
AKM4  1 6 17 30 55 0 0 6 12
AKM5  1 6 17 30 55 0 0 6 10
AKM6  1 6 17 30 55 0 0 8 16
AKM7  1 6 17 30 55 0 0 7 13
AKM8  1 6 17 30 55 0 2 3 9
DBL/DBK 1 6 17 30 55 0 0 0 0

Operation with extrem environment conditions like deep temperature depend on the used feedback system. The used bearing grease works down to -40°C, resolver motors down to -20°C, encoder motors should not be operated with environment temperature below 0°C. In case of deep temperature it must be considered, that water may condense in the motor housing.