5.9 n: Special Adjustments
■ n5-03: Inertia Compensation Gain
Parameter n5-03 sets the inertia ratio of the load connected to the motor.
No.
Parameter Name
Setting Range
Default
n5-03
Inertia Compensation Gain
0.00 or 100.00
1.00
Calculate the value for n5-03 as explained below.
^Mot - Motor inertia in kgm 2
nr Mot - Rated motor speed in r/min
Tr Mot - Rated motor torque in Nm
J
ts
- Traction sheave inertia in kgm 2
i - Grar ratio (nLoad/nMot)
v r Elev - Rated elevator speed in m/s
Xm - Mass o f all m oved parts (car, counterweight, ropes, load <1>) in kg
<1> Insert 0 kg for the load to calculate the lowest setting, insert the elevator rated load to calculate the maxim um setting for
n5-03. Use the low er o f calculated values for initial trials and increase n5-03 gradually until the desired perform ance is
achieved.
■ Speed Feedback Compensation: Speed Observer
Enabling the Speed Feedback Compensation can reduce oscillation and increase responsiveness to the speed reference by
compensating for phase delay.
N ote: 1. Set n5-07 to 1 to use the Speed Feedback Compensation.
2.
Set C5-17 (m otor inertia) and C5-18 (load inertia ratio) to the correct values before using the Speed Feedback Compensation.
3.
I f the product o f C5-17 x C5-18 is relatively large, the estimated speed will be very slow.
4.
Reduce the products o f C5-17 x C5-18 if oscillation is a problem.
5.
C5-18 to at least 1.1 w hen using the Speed Feedback Compensation. A setting o f 1.0 or less disables the Speed Feedback
Compensation.
Adjusting the Speed Feedback Compensation
Follow the procedure below to set up the Speed Feedback Compensation
1. Set the drive for Closed Loop Vector for PM motors.
2. Enter the correct data from the motor nameplate and the motor test report to the E5-D D parameters.
3. Set all ASR-related parameters (C5-DD) to their most appropriate values.
4. Set the Speed Feedback Compensation to operate in test mode (n5-07).
5. Connect the ropes to the motor.
6
. Start operating the elevator while looking at the Speed Feedback Compensation output monitor (U6-56) and the motor
speed feedback (U1-05).
7. Adjust the Speed Feedback Compensation gain (n5-08) and C5-18 so that the monitor values in U6-56 and U1-05 are
relatively low.
Figure 5.43
shows a block diagram for the Speed Feedback Compensation.
F ig u r e 5 .4 3 S p e e d F e e d b a c k C o m p e n s a t i o n O p e r a tio n
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual