No-Load Operation - YASKAWA V1000 Series Technical Manual

No. Name
Provides iron loss for determining Energy Saving coefficient. When power is cycled, the value set to E2-10
T1-11 Motor Iron Loss will appear (the motor iron loss). If T1-02 is changed, an initial value for the motor capacity will appear that
is close to the capacity that was changed.
<1> Normally not displayed.
<2> Voltage and frequency settings for vector motors and drive motors are often lower than for standard motors. Be sure to enter Auto-Tuning data according to the motor nameplate and motor
data sheets. If the no-load voltage and frequency values are shown, enter those values into T1-03 and T1-05.
Precision Settings for Auto-Tuning
n
Basic motor nameplate data can be used to auto-tune a motor. However, improved performance can be achieved by using precise data for base voltage
and base frequency. If the base no-load voltage and frequency are known, enter this data when executing auto-tuning to improve performance.
Parameter
T1-03 Enter the motor rated voltage
T1-05 Enter the motor base frequency
u

No-Load Operation

This section explains how to operate the drive with the motor uncoupled from the load during a test run.
Before Starting the Motor
n
Check the following items before operation:
• Ensure the area around the motor is safe.
• Set the proper motor rated current to T1-04 to prevent overheating or other damage from motor overload.
• Ensure external emergency stop circuitry is working properly and other safety precautions have been taken.
During Operation
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Check the following items during operation:
• The motor should rotate smoothly (i.e., no abnormal noise or oscillation).
• The motor should accelerate and decelerate smoothly.
Operation Instructions
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The following example illustrates a procedure to run the drive using the digital operator.
Note: Before starting the motor, set the frequency reference to 6 Hz.
1. Turn on the power to the drive. The initial display appears.
2.
Press the key to select LOCAL. The LO/RE LED will turn on.
3.
RUN
Press to give the drive a run command. RUN will light and the motor will rotate at 6 Hz.
4. Ensure the motor is rotating in the correct direction and no faults or alarms occur.
If there is no error in step 4, press
increments verifying smooth operation results at all speeds. For each frequency monitor the drive output current
5.
(U1-03) through the LED operator to confirm the current is well below the motor rated current. Example: 6 Hz →
50 Hz/60 Hz.
Note: Refer to Auto-Tuning Errors on page 228
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
Description
Normal Settings
Enter the no-load voltage when the motor is operating at its rated revolutions per minute
Enter the no-load frequency when the motor is operating at its rated revolutions per minute
Refer to The Drive and Programming Modes on page 61
Step
to increase the frequency reference. Increase the frequency in 10 Hz
for help with errors that occur while Auto-Tuning the drive.
Range Def.
0 to 65535 14W
Precision Tuning
for instructions.
Display/Result
STOP
STOP
Off On
Motor
Forward
4.7 Test Run
Control Mode
V/f OLV
A −
4
95