Expected Lifetime - ABB AMXE132 Manual

2.2. Expected lifetime

2.2 Expected lifetime
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The electrical performance data on the rating plate is only valid if the motor is connected to a liquid
cooling system. The requirements of the liquid cooling system are shown on a separate rating plate
located on the motor, see Figure 1. An example of a separate rating plate can be seen in Figure 3.
The electrical performance data on the rating plate is only valid if the motor is connected to a
cooling system. The requirements of the cooling system are shown on a separate rating plate
located on the motor, see Figure 1. An example of a separate rating plate can be seen in Figure 3
Figure 3. Example of separate rating plate with liquid cooling system data.
Figure 3 Example of separate rating plate with cooling system data
The expected lifetime is very dependent on the motor´s winding and bearing temperature. The lower the
The expected lifetime is very dependent on the motor´s winding temperature. The lower the
temperature the longer expected lifetime. The insulation system for the motor is class H, which means
temperature the longer expected lifetime. The insulation system for the motor is class H, which
that the winding temperature should not exceed 180°C. If the winding temperature is kept below this means that the winding temperature should not exceed 180°C. If the winding temperature is kept
below this limit, the expected lifetime of the insulation system is at least 25,000 hours. The
limit, the expected lifetime of the insulation system is at least 20,000 hours. The electrical performance
electrical performance data on the rating plate, see Figure 2, is the continuous operation point (S1).
data on the rating plate, see Figure 2, is the continuous operation point (S1). Operating in this point will
Operating in this point will not compromise the expected lifetime. As a simplified method, the S1
not compromise the expected lifetime. As a simplified method, the S1 power in a duty cycle can be
power in a duty cycle can be calculated by the root mean square method:
calculated by the root mean square method:
1 2 ∗ �������� ∗ ��������
= �
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� ��������� ∗ (
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�������� �������� �������� ��������
�������� = 1
�������� = �������� �������� �������� �������� �������� [�������� �������� �������� ]
n = speed [rpm]
�������� = �������� �������� �������� �������� �������� �������� [�������� �������� ]
M = torque [Nm]
�������� = �������� �������� �������� �������� �������� �������� �������� �������� �������� �������� �������� �������� �������� ��������
T = total cycle time
So, in a duty cycle, the rated torque and power on the rating plate could be exceeded short term (peak
torque and peak power) as long as the winding temperature do not exceed 180°C.
So, in a duty cycle, the rated torque and power on the rating plate could exceed the short term
(peak torque and peak power) as long as the winding temperature do not exceed 180°C.
As mentioned in the Product description, the motor is equipped with temperature sensors in the stator
winding. In most inverters, it is possible to set a warning limit and a shutdown limit for the winding
As mentioned in the Product description, the motor is equipped with temperature sensors in the
temperature. To not compromise the expected lifetime, the values in Table 1 are recommended.
stator winding. In most inverters, it is possible to set a warning limit and a shutdown limit for the
winding temperature. To not compromise the expected lifetime, the values in Table 2 are
Action Limit
recommended.
Warning 180°C
Action
Shut down 200°C
Warning
Shut down
Table 2. Recommended temperature limits.
Table 2 Recommended temperature limits
NOTE: The warning and shut down limits are only valid for short term operation. Prolonged
The expected lifetime for bearings and external seals is not solely temperature dependent and
operation at high stator winding temperatures will significantly impact the bearing grease
needs to be evaluated based on the duty cycle. Please contact your local ABB sales office for
lifetime.
technical support.
The expected lifetime for bearings and external seals is not solely temperature dependent and needs to
be evaluated based on the duty cycle. Please contact your local ABB sales office for technical support.
Motors for heavy electrical vehicles, type AMXE132
2
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60
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Limit
170°C
180°C
Product description
12 (34)
11