Omron G5 Series User Manual page 152

3 Specifications
Torque-Rotation Speed Characteristics for 1,000-r/min Servomotors
• 1,000-r/min Servomotors (200 VAC)
The following graphs show the characteristics with a 3-m global non-flexible cable and a 200-VAC
input.
• R88M-KE90010H
(900 W)
Power supply voltage
[N·m]
dropped by 10%
19.3 19.3(1800)
(1600)
20
Momentary
operation range
14.0
8.59 8.59
10
Continuous
operation range
0 1000 2000 [r/min]
Note 1 The continuous operation range is the range in which continuous operation is possible. Continuous operation at the
maximum speed is also possible. However, doing so will reduce the output torque.
2 If the motor power cable exceeds 20 m, the voltage drop will increase and the momentary operation range will
become narrower.
Temperature Characteristics of the Motor and Mechanical System
• G5-series AC Servomotors (Pulse-train Input Type) use rare earth magnets (neodymium-iron
magnets).
The temperature coefficient for these magnets is approximately -0.13%/°C. As the temperature
drops, the motor's momentary maximum torque increases, and as the temperature rises, the motor's
momentary maximum torque decreases.
• The momentary maximum torque rises by approximately 4% at a normal temperature of 20°C
compared to a temperature of -10°C.
Conversely, the momentary maximum torque decreases approximately 8% when the magnet warms
up to 80°C from the normal temperature.
• Generally, when the temperature drops in a mechanical system, the friction torque and the load
torque increase.
For that reason, overloading may occur at low temperatures. In particular, in systems that use a
Decelerator, the load torque at low temperatures may be nearly twice as much as the load torque at
normal temperatures.
Check whether overloading may occur when starting at low temperatures.
Also check to see whether abnormal motor overheating or errors occur at high temperatures.
• An increase in load friction torque seemingly increases load inertia.
Therefore, even if the Servo Drive gains are adjusted at a normal temperature, the Servomotor may
not operate properly at low temperatures.
Check to see whether optimal operation can be obtained even at low temperatures.
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• R88M-KE2K010H
(2 kW)
[N·m]
47.7
50
Momentary
operation range
25
19.1
8.0
Continuous
4.3
operation range
0
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User's Manual
• R88M-KE3K010H
(1400) 47.7(1600)
Power supply
voltage
dropped by 10%
28.0
19.1
18.0
9.6
1000 2000 [r/min]
(3 kW)
[N·m]
71.7 (1400) 71.7(1600)
70
Power supply
Momentary
voltage
operation range
dropped by 10%
40.0
35 28.7 28.7
20.0
Continuous
14.0
operation range
0 1000 2000 [r/min]