User`s manual

apfiff09 marine vacon • 233
24-
6
9.3 Identification with incremental encoder with Z-pulse input.
When using incremental encoder with Z-pulse, identification is made only once. Remade is needed if
encoder and rotor position changes related to each other.
Motor needs to be able to rotate freely that magnet positions can be identified. Identification mode in
During identification drive feeds DC current to motor (~90 % of motor nominal), this causes motor to
move to zero position, there may be oscillatory movement on the shaft. When motor oscillatory
movement has stopped motor is rotated until Z-pulse is received from the encoder. When
to zero and identification warning is displayed for 10 seconds (W57). If identification is made several
times result may be different, there are as many positions as there are pole pairs in the motor.
current to
-pulse is received from the encoder. During this DC
injection motor may not be able to produce 100 % torque. When running without load Z-pulse
position can be seen in the motor current when current goes nearly to zero.
Related parameters:
P2.1.9 Identification
P2.8.5.1 PMSM Shaft Position
P2.8.5.6 I/f Current