Siemens SINAMICS G150 Operating Instructions Manual page 413

If the torque constant k
can calculate this value from the rated motor data or from the stall current I
M
0
k
T
The optional motor data can be entered if it is known. Otherwise, this data is estimated from
the type plate data or determined by means of motor identification or speed controller
optimization.
Table 7- 3 Motor data type plate
Parameter Description
p0320 Rated motor short-circuit current
p0322 Maximum motor speed
p0323 Maximum motor current
p0325 Rotor position identification current, 1st phase
p0327 Optional load angle
p0328 Reluctance torque constant
p0329 Rotor position identification current
p0341 Motor moment of inertia
p0344 Motor weight
p0350 Stator resistance, cold
p0356 Quadrature axis stator inductance Lq
p0357 In-line stator inductance Ld
Short-circuit protection
For short circuits that can occur in the drive converter or in the motor cable, the rotating
machine would supply the short-circuit until it comes to a standstill. An output contactor can
be used for protection. This should be located as close as possible to the motor. This is
particularly necessary if the motor can still be driven by the load when a fault develops. The
contactor must be provided with a protective circuit against overvoltage on the motor side so
that the motor winding is not damaged as a result of the shutdown.
Control signal r0863.1 (VECTOR) is used to control the contactor via a free digital output; the
checkback contact of the contactor is connected to parameter p0864 via a free digital input.
This means that if the drive converter develops a fault with a shutdown response, at the
instant in time that the pulses are inhibited, the motor is isolated from the drive converter so
that energy is not fed back to the fault location.
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
is not stamped on the rating plate or specified in the data sheet, you
T
as follows:
s ×
60 P
M
N
= N =
min k =
T
π × × or
I 2 n I
N N N
7.4 Vector speed/torque control with/without encoder
M
0
I
0
Comment
This is used for the field weakening characteristic
Maximum mechanical speed
De-magnetization protection
-
Optional otherwise leave at 90°
-
-
For speed controller pre-control
-
-
-
-
Setpoint channel and closed-loop control
and stall torque
0
411