Lenze i950

If the servo control is set for synchronous motor and no error is pending, the current is rst
raised in a ramp-shaped manner to 141 % of the rated motor current aer the inverter is ena-
bled.
Le image
First, the rotor is moved from any posion of rest to the 0° angle.
•
F
or this purpose, the amplitude of the d current vector is created in the stator coordinate
system at a starng angle of 45° and then turned to 0°.
•
A
suciently high amplitude of the d current vector and its rotary moon result in a mag-
nec force that moves the rotor to the angle 0°.
Right image
Aerwards, the d current vector is turned further in 15 steps by 22.5° each starng at the
angle 0°.
•
Due t
o the
magnec forces, the rotor adjusts to the respecve angle.
•
Aer 16 steps, the rotor has moved by absolute electrical 360°.
Result
For determining the pole posion, a mean value is calculated from all 16 messages. The rotor
displacement angle can be recorded via the 0x2DDE parameter (actual motor rotor angle posi-
on). The detected pole posion is stored in the inverter parameters ,
0x2C03:0020x2C03:004. The detected pole posion must then be saved.
Abort of the pole posion idencaon
The pole posion idencaon is aborted if the deviaons between the rotary moon of the
current vector and the rotor exceed the fault tolerance set in 0x2C41:004 (check if parameter
is available).
Precondions for the performance
•
The mot
or must not be braked or blocked during the pole posion idencaon.
•
The servo inverter is error-free and in Switched on device state.
Response of the motor during performance
The rotor aligns during the pole posion idencaon. The motor
sha moves by max. one
electrical revoluon which causes a corresponding movement of the connected mechanics!
How to execute the pole posion idencaon PLI (360°):
1.If the servo inverter is enabled, disable it.Enable operaon
2.Set the object 0x2825 to "5" to change to the "pole posion idencaon PLI (360°)" oper-
ang mode.
3.Before the PLI can be started, the works menoned below must be completed.
4.Enable the servo inverter to start the pole posion idencaon (360°). Note: Inhibing the
controller serves to abort the started procedure any me if required without changing the
sengs.
Aer the pole posion idencaon has been completed successfully...
...the controller is inhibited automacally and the pole posion determined for the acvated
feedback system is set in the 0x2C03:002 object.
•
Sa
ve the changed
sengs.
The »EASY Starter« serves to save the parameter sengs of the servo inverter as parame-
ter le (*.gdc). Saving the parameter sengs
•
The in
verter disable set automacally by the procedure can be deacvated again via the
CiA402 c
ontrol word 0x6040. Enable operaon
Conguring the feedback system
S
ynchronous motor: Pole posion idencaon (PPI)
Pole posion idencaon (PPI) 360°
228