Siemens 1FW6092-2PC15-6AB3, Руководство по настройке

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Technical data and characteristics
6.1 Explanations
1FW6 High Speed built-in torque motors
Configuration Manual, 01/2020, 6SN1197-0AE03-0BP3
141
M
0
* Thermal static torque when the current is unevenly distributed across the three
motor lines. An uneven current load occurs in the following operating modes:
•
Standstill
• Operation with short cyclic rotations (< 1 pole pitch)
•
for n << 1 rpm
Since the saturation effect can be disregarded for the rated current, the following
applies approximately:
I
0
* Thermal stall current (rms value) of the motor at M
0*
. The following applies:
Physical constants
k
T,20
Motor torque constants at a rotor temperature of 20 °C (refers to the lower linear
range of the torque–current characteristic).
k
E
Voltage constants for calculating the mutually induced line-to-line voltage.
k
M,20
Motor constant for a winding temperature of T = 20 °C.
The motor constant k
M
(T) can be calculated for other temperatures:
k
M
(T) = k
M,20
∙ [1 + α (T – 20 °C)]
using the temperature coefficients α = − 0.001 1/K for magnets
k
M
(T) = k
M,20
∙ [1 - 0.001 ∙ (T – 20 °C)]
t
TH
Thermal time constant of the motor winding. This is derived from the temperature
characteristic in the winding with a sudden load and constant current. See diagram
below. After time t
TH
has elapsed, the motor winding reaches approx. 63% of its
final temperature T
GRENZ
, if the thermal protection does not respond beforehand.
Figure 6-1 Thermal time constant