Fast Magnetization For Induction Motors - Siemens SINAMICS G150 Operating Instructions Manual

Functions, Monitoring, and Protective Functions
9.2 Drive Functions
9.2.3

Fast magnetization for induction motors

Description
Fast magnetization for induction motors is used to reduce delay time during magnetization.
Features
● Rapid flux build-up by impressing a field-producing current at the current limit, which
● If the "Flying restart" function is activated, the excitation build-up time set in p0346 is still
Commissioning
Parameter setting p1401.6 = 1 is necessary to activate fast magnetization.
This setting initiates the following sequence during motor starting:
● The field-producing current setpoint jumps to its limit value: 0.9 x r0067 (I
● The flux increases as fast as physically possible with the specified current.
● The flux setpoint r0083 is made to follow accordingly.
● As soon as the flux threshold value programmed in p1573 is reached (min.: 10%, max.
Note
The flux threshold value set in parameter p1573 is effective only if the actual flux during
magnetization reaches the value programmed in p1573 before the timer set in p0346
runs down.
● The flux is increased further until the flux setpoint in p1570 has been reached.
● The field-producing current setpoint is reduced by means of a flux controller with P gain
Notes
When quick magnetization is selected (p1401.6 = 1), smooth starting is deactivated internally
and alarm A07416 displayed.
When the stator resistance identification function is active (see p0621 "Identification of stator
resistance after restart") is active, quick magnetization is deactivated internally and alarm
A07416 displayed.
428
considerably reduces the magnetization time.
used.
200%, factory setting: 100%), excitation ceases and the speed setpoint is enabled. The
flux threshold value must not be set too low for a large load because the torque-
producing current is limited during magnetization.
(p1590) and the parameterized smoothing factor (p1616).
max
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
).