Omron M1 Series User Manual page 429

PM Motor Adjustment
Adjust the PM motor as shown in the table below depending on its operation status and the phenom-
enon.
Operation status
During startup
Motor rotating
M1 Series Standard Type User's Manual (I669)
Phenomenon
The motor may rotate slightly in magnetic pole
alignment during startup.
Motor rotates Set 1st PM Motor Starting Method P30 to 1 to
in reverse or suppress the rotation amount during startup.
rotates slightly. When operation is performed with P30 set to 0 or
3, reverse rotation becomes difficult by lowering
P74.
If the motor stalls during startup, a large current
may flow, which causes an overcurrent trip.
Increase the PM motor starting current value.
Increasing the PM motor starting current value im-
proves the magnetic pole alignment during start-
up, which results in an increase in the startup tor-
que.
Motor stalls or
However, setting this parameter to an excessively
causes an
large value may cause detection of an overload.
overcurrent
Check the value in the monitor of electronic ther-
trip.
mal overload protection for motor (monitor mode:
5_62).
Increase the PM motor starting time value.
This increases the time during which the starting
current flows to improve magnetic pole alignment
during startup, which results in an increase in the
startup torque.
Motor starting
time is too Set P30 correctly according to the motor in use.
long.
If the motor rotation is unstable during startup, in-
crease the motor starting current.
However, setting this parameter to an excessively
Rotation is un-
large value may cause detection of an overload.
stable.
Check the value in the monitor of electronic ther-
mal overload protection for motor (monitor mode:
5_62).
A shock or
Adjust the speed control gain to a larger value and
overcurrent trip
the integral time to a smaller value.
occurs.
Adjust the speed control gain to a smaller value
and the integral time to a larger value.
Motor is hunt- Increase the carrier frequency if it is low.
ing or vibrat-
Gradually increase the PM motor d-axis induc-
ing.
tance.
Gradually increase the PM motor q-axis induc-
tance.
6 Vector Control and Applied Functions
Description of adjustment
Adjustment
item
P30
P74
P74
6
F24
P30
P74
d03, d04
d03, d04
F26
P61
P62
6-23