Vacon apfiff09 marine, Applications Manual

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• VACON®
apfiff09 marine
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
P2.8.6.3 Start Angle Identification Current ID1759
“StartAngleIdCurr”
This parameter defines the current level that is used in start angle identification. The
correct level depends of the motor type used. In general, 50% of motor nominal current
seems to sufficient, but depending for example on the motor saturation level, higher
current might be needed.
P2.8.6.4 Polarity Pulse Current ID1566
“PolarityPulseCur”
This parameters defines the current level for the magnet axis polarity direction check
during the start angle identification (P2.8.6.2 / ID1691). Value 0 means that the internal
current level is used, which is typically slightly higher than the normal identification
current defined by P2.8.6.3 / ID1759. Polarity direction check is seldom needed because
the identification itself gives already the right direction. Hence in most cases, this function
can disabled by setting any negative parameter value, which is recommended especially
if there occurs F1 faults during the identification.
P2.8.6.5 Start Angle Identification Time ID1755
“StartAngleIdTime”
Start angle can be determined also by feeding dc-current into the motor. The dc-current
will align the rotor magnet axis with the stator magnet axis. This function is activated by
determining how long the dc-current is injected to the motor. The motor must be free to
move during the alignment and the time needs to be long enough for the shaft
oscillations to damp out. Hence, this method is not very practical and is mainly intended
to be used for testing purposes or to improve starting together with i/f-control. Dc-current
level is determined by ID1693 / P2.8.6.6. Also ID1691 / P2.8.6.2 needs to disabled,
otherwise it will override this function.