YASKAWA T1000A, Техническое руководство, Страница: 239 / 517

5.9 n: Special Adjustments
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 239
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5
Measuring Acceleration Time
Take the following steps when measuring the motor acceleration time.
1.
Decouple motor and load.
2.
Make sure Auto-Tuning has been performed or that the correct motor data has been entered manually.
3.
Make sure that the speed loop (ASR) has been set up properly.
4.
Set the acceleration time to zero.
5.
Set the forward torque limit in parameter L7-01 to 100%.
6.
Set the frequency reference equal to the motor rated speed.
7.
While monitoring the motor speed in U1-05, start the motor in the forward direction and measure the time it takes
to reach the rated speed.
8.
Reverse the parameter settings above and set the measured time to parameter n5-02.
n
n5-03: Feed Forward Control Gain
Parameter n5-03 sets the inertia ratio of the load connected to the motor.
This value can be set automatically by Inertia Auto-Tuning. If Inertia Auto Tuning cannot be performed, determine the
value for parameter n5-03 using the following steps.
1.
Setup parameter n5-02 correctly.
2.
Couple motor and load.
3.
Set the acceleration time C1-01 to 0.
4.
Set the torque limits in the L7-
††
parameters to a value that will easily be reached during the test (T
Lim_Test
).
5.
Set the frequency reference equal to a value in the upper speed range of the machine (f
ref_Test
).
6.
While monitoring the motor speed in U1-05, start the motor in the forward direction and measure the time it takes
to reach the set speed (t
accel
).
7.
Reverse the parameter settings above and calculate the set value for parameter n5-03 using the formula below.
u
n6: Online Tuning
Online Tuning prevents loss from insufficient torque and diminished speed control accuracy due to fluctuating motor
temperature.
n
n6-05: Online Tuning Gain
Sets the compensation gain for the voltage correction in the Online Tuning function (n6-01 = 2). Normally there is no
need to adjust n6-05, but increase the set value in steps of 0.1 if an overload fault occurs during voltage correction.
u
n8: PM Motor Control Tuning
These parameters are available in the vector control modes for permanent magnet motors and can be used to adjust the
control performance.
n
n8-01: Initial Rotor Position Estimation Current
The initial rotor position estimation current is the current used to detect the initial position of the rotor. The value is set as
a percentage of the motor rated current (E5-03), using setting units of 1%. This parameter rarely needs to be changed.
If the motor nameplate lists an Si value, enter that value here.
Note: Parameter n8-01 is available only when in AOLV/PM or CLV/PM control mode.
No. Parameter Name Setting Range Default
n5-03 Feed Forward Control Gain 0.00 or 100.00 1.00
Where:
• t
accel
is the measured acceleration time in s.
• f
rated
is the rated frequency of the motor in Hz.
• T
Lim_Test
is torque limit setting during the test in %.
• f
ref_Test
is the frequency reference during the test in Hz.
No. Name Setting Range Default
n6-05 Online Tuning Gain 0.10 to 5.00 1.00
No. Name Setting Range Default
n8-01 Initial Rotor Position Estimation Current 0 to 100% 50%
n5-03 =
t
accel
T
Lim_Test
f
rated
n5-02 f
ref_Test
100
- 1