Appendix
A.1 Description of terms
1FT7 Synchronous Motors
Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
245
Note
This constant is not applicable when configuring the necessary rated and acceleration
currents (motor losses!).
The steady-state load and the frictional torques must also be included in the calculation.
Voltage constant k
E
(value at 20° C rotor temperature)
Value of the induced motor voltage at a speed of 1000 RPM and a rotor temperature of 20°
C.
The phase-to-phase RMS motor terminal voltage is specified for 1FT7 Compact motors.
Winding resistance R
ph
at 20 °C winding temperature
The resistance of a phase at a winding temperature of 20° C is specified. The winding has a
star circuit configuration.
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