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Motor components, characteristics and options
4.1 Motor components
The pole position identification is available in two variants.
Precondition
Accuracy of determining the
rotor position.
Effect of series reactors
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.
72
Motion-based pole position identifica-
tion
The rotor must be able to freely rotate.
High, independent of the magnetic proper-
ties
Using series reactors has no effect on the
result.
Induction-based pole position identifica-
tion
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.
Dependent on the magnetic motor charac-
teristics
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.
SIMOTICS M-1FE1 synchronous built-in motors
Configuration Manual, 09/2019, A5E47872980B AA
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