Omron SYSDRIVE 3G3RV, User Manual

Page: 121 / 446

Trial Operation Procedures
4-
15
n
Precautions After Using Autotuning
When
using a spindle motor, the maximum output speed is higher than the rated frequency (or Base Fre-
quency,
FA (E1-06)). For the region greater than FA, defined as the constant output range, output torque is
reduced
because the voltage does not increase for an increase in the frequency.
For
application in the constant output range, the V/f characteristics must be reconfigured manually after auto-
tuning
is performed. Set E1-03=F, and parameters E1-04 through E1-10 to the correct values. Do not change
E1-06
(Base Frequency) and E1-13 (Base Voltage) because they are auto-turned to the optimum values.
Increasing the Motor’s Rated Speed by 1 to 1.2 Times
To
increase the motor’s rated speed by 1 to 1.2 times, use the following formula to change the setting of E1-04
(Maximum
output voltage):
E1-04
= (Motor’s rated speed) × (No. of motor poles)/120 (Hz) × (1 to 1.2)
If
the motor’s speed is increased beyond the rated speed, fixed output characteristics will be used at high
speeds
and motor torque will be reduced.
Applications to Constant Output Motors Such as Motors for Machine Tools
Use
the following formula to change the settings of E1-04 (Maximum output frequency) and E1-05 (Maxi-
mum
voltage) when using a motor with a fixed output, e.g., a motor for a machine tool:
E1-04
= Frequency (Hz) at maximum speed under no-load conditions (load rate = 0)
E1-05
= Voltage (V) at maximum speed under no-load conditions (load rate = 0)
Do
not change the E2 motor constants after performing autotuning.
n
Precautions for Precision Settings
Settings
for autotuning are different when performing autotuning using motor test reports or design data. Use
the
following table as reference.
Operator Display Simple Setting Precision Setting
T1-03 Motor
rated voltage
Voltage
under no-load con-
ditions
at motor rated speed
T1-05 Motor
base frequency
Frequency
under no-load
conditions
at rated speed