Siemens SIMOTICS M-1FE2, Руководство по настройке

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Configuration
5.1 Configuration workflow
SIMOTICS M-1FE2 built-in motors
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Configuration Manual, 05/2021, A5E50494252B AB
Specifying the motor on the basis of the load
1. With the help of the characteristic curves, find characteristic operating points of torque and
speed with which you can specify motors according to load
2. Specify the operating scenario and the load
3. Calculate the maximum motor torque
The maximum motor torque occurs during the acceleration phase. In the acceleration
phase, the load torque and the torque required to accelerate the motor are added
4. Verify the maximum motor torque with the limiting characteristic curves of the motors
5. Specify the motor
The following criteria must be taken into account when the motor is selected:
– The dynamic limits must be observed. All torque-speed points of the load must be
below the relevant limiting characteristic curves.
– The thermal limits must be observed. On synchronous motors, the effective motor
torque must be below the S1 characteristic (continuous duty). The effective motor
torque is around the average motor speed resulting from the load duty cycle.
Note
In the case of synchronous motors, note that the maximum permissible motor torque
is reduced at higher speeds as a result of the voltage limiting characteristic.
To safeguard against voltage fluctuations, maintain a 10% distance from the voltage
limiting characteristic.
❒
Load duty cycles with constant on period
For load duty cycles with constant on time, specific requirements are placed on the torque
characteristic as a function of the speed
e.g. M = constant, M ~ n
2
, M ~ n or P = constant.
These drives typically operate at a specific operating point. This stationary operating point is
dimensioned for a base load.
The base load torque must lie on or below the S1 characteristic.
In the event of transient overloads (e.g. when accelerating) an overload has to be taken into
consideration.
For synchronous motors, the peak torque must lie below the voltage limiting characteristic.