Siemens SINAMICS G150, Operating Instructions Manual

Page: 468 / 680

Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
Converter cabinet units
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Operating Instructions, 07/2016, A5E03347396A
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 Comment
p0320 Rated motor short-circuit current This is used for the field weakening characteristic
p0322 Maximum motor speed Maximum mechanical speed
p0323 Maximum motor current De-magnetization protection
p0325 Rotor position identification current, 1st phase -
p0327 Optional load angle Optional otherwise leave at 90°
p0328 Reluctance torque constant -
p0329 Rotor position identification current -
p0341 Motor moment of inertia For speed controller pre-control
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) controls 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.
Function diagram
FP 6721 Vector control - Id setpoint (PEM, p0300 = 2)
FP 6724 Vector control – field weakening controller (PEM, p0300 = 2)
FP 6731 Vector control - interface to Motor Module (PEM, p0300 = 2)