Lenze I95AE240F User Manual

12.4 Synchronous motor: Pole posion idencaon (PPI)
For controlling a permanent-magnet synchronous motor, the pole posion - the angle
be
tween the motor phase U and the eld axis of the rotor - must be known.
•
F
or Lenze motors with absolute value encoder or resolver, the pole posion has already
been se
t correctly.
•
When incremental encoders are used (TTL or sin/cos encoders without absolute posion
informaon), a pole posion idencaon (PPI) is always required. This also applies to
Lenze motors.
NOTICE
The pole posion
idencaon (PPI) must only be executed
▶
for servo control with a synchronous motor of an original equipment manufacturer.
▶
for servo control with a synchronous motor and incremental encoders (TTL or sin/cos
encoder).
▶
aer changes to the motor feedback system, e.g. feedback replacement.
The parameter sengs for pole posion idencaon are accessed in »EASY Starter« via the
f
ollowing path:
•
Sengs tab
•
Basic seng \ Motor feedback (A)
Three dierent idencaon methods are oered here:
•
360° electric
al
•
With min. movement
•
Without movement
The criteria for selecng the most suitable idencaon method are presented below.
Selecon criteria for using the suitable pole posion idencaon
For idenfying the pole posion for the currently
acvated feedback, the following funcons
are available which all provide almost the same result. Due to e.g. fricon, bearing forces and
a trapezoidal eld paern, the results may dier from each other.
4P
ole posion idencaon (PPI) 360° ^ 203
•
The mot
or must not be braked, blocked or mechanically driven during the pole posion
idencaon! This funcon must not be used for hanging loads!
•
Especially in c
ase of idling drives or drives with a low load (inera / fricon), this funcon
delivers the most accurate results.
4Pole posion idencaon (PPI) with minimum movement ^ 207
•
The mot
or must not be braked, blocked or driven during the pole posion idencaon!
Thus, this funcon must not be used for hanging loads!
•
R
egarding the accuracy, this funcon is in the middle range. A percentage increase of the
current amplitude can enhance the accuracy of the results if required.
4P
ole posion idencaon (PPI) without movement ^ 210
•
In c
ase of stalled motors (e.g. with hanging loads), only this funcon shall be used!
•
This funcon was developed for a wide range of motor characteriscs. In case of some
mot
or types, however, the idened pole posion angle may dier considerably from the
real pole posion angle, so that a considerable loss in torque and greater motor losses may
occur. Thus, especially when using third-party motors, we recommend the execuon of a
reference idencaon with an idling motor4P
ole posion idencaon (PPI) 360° .
^ 203
If the idened values of both processes dier from each other by more than 20°, please
contact Lenze.
Detailed informaon on the respecve funcon can be found in the following subchapters.
Conguring the feedback system
S
ynchronous motor: Pole posion idencaon (PPI)
201

Lenze I95AE240F Specifications

General

Brand	Lenze
Model	I95AE240F
Category	Inverter
Language	English