Motor components, characteristics and options
4.1 Motor components
SIMOTICS M-1FE1 synchronous built-in motors
72
Configuration Manual, 09/2019, A5E47872980B AA
The pole position identification is available in two variants.
Motion-based pole position identifica-
tion
Induction-based pole position identifica-
tion
Precondition
The rotor must be able to freely rotate.
•
The rotor can rotate freely or be
blocked
•
The pole position identification re-
quires a minimum current. The rated
current (S1 current) of the motor mod-
ule must be
≥
50% of the rated motor
current.
Accuracy of determining the
rotor position.
High, independent of the magnetic proper-
ties
Dependent on the magnetic motor charac-
teristics
Effect of series reactors
Using series reactors has no effect on the
result.
Using series reactors or motors with low
saturation levels is not recommended, as
determining the rotor position is not pre-
cise enough, or the pole position identifi-
cation does not provide any result.
4.1.4.1
Special issues regarding pole position identification for specific motors
For high-speed main spindle synchronous motors, the electrical pole position angle is
not precise enough when using the inductance-based pole position identification
technique.
This applies to the following motors:
●
1FE1 - versions with series reactor on the motor side
●
1FE105
☐
-4H (High Speed 2 series)
For these motors, the inductance-based pole position identification is sufficient for
starting. However, they do not achieve their optimum efficiency.
There are 2 alternative strategies when operating the specified motors:
1. Switching over the pole position technique from saturation-based to motion-based.
Prerequisite:
The rotor must be free to rotate when switching on.
If you cannot ensure this, because, for example, in the case of a fault, the spindle is
blocked by the tool, then you cannot apply the motion-based pole position identification
technique.
