Siemens SINAMICS S150 NEMA, Руководство по эксплуатации

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Functions, monitoring and protective functions
9.5 Monitoring functions and protective functions
Enclosed Drives
706
Operating Instructions, 12/2018, A5E36652151A
Thermal motor model 1 (for permanent-magnet synchronous machines)
By deploying the thermal I
2
t motor model, the temperature rise of the motor windings as a
result of dynamic motor loads is also determined in addition to data acquired using a
temperature sensor.
The model motor temperature is indicated in r0632. It is calculated from the following values:
● Absolute value of the actual current, unsmoothed (r0068[0])
● Motor stall current (p0318)
● I
2
t motor model thermal time constant (p0611)
● Measured motor temperature (r0035) or motor ambient temperature (p0613, p0625) for
operation without temperature sensor
● Motor temperature at rated load (p0605, for expansion p0627)
Commissioning the motor model
The thermal I
2
t motor model is activated via p0612.0 = 1, the expansions of the motor model
can additionally be activated via p0612.8 = 1.
Note
When commissioning the motor, thermal motor model 1 (p0612.0 = 1) including expansion
(p0612.8 = 1) is automatically activated.
Preconditions for automatic activation:
•
Use of a permanent magnet synchronous motor
• There is no motor sensor
•
No (other) thermal motor model is activated