Adjustments For Elevator Ride Comfort - YASKAWA L1000A Technical Manual

◆ Adjustments for Elevator Ride Comfort

This section explains the adjustment of drive settings used to eliminate problems with hunting, vibration, and rollback.
Perform the steps presented in this section after the Basic Application Setup procedure is complete. Also refer to
Comfort Related Problems on page 154
■ Speed Loop Adjustments (CLV and CLV/PM)
The speed control loop uses four different gain and integral time settings that can be adjusted using C5- parameters.
The settings are switched over when the motor speed reaches the level set in parameter C5-07.
• Proportional gain and integral time C5-03/04 are used at start when the speed is lower than the setting of C5-07.
• Proportional gain and integral time C5-01/02 are used at speeds above the setting of C5-07.
• Proportional gain and integral time C5-13/14 are used at stop when leveling speed is selected as speed reference and the
speed is lower than the setting of C5-07.
• Proportional gain and integral time C5-19/20 are used During Position Lock at start in CLV/PM.
Increase the gain and shorten the integral time to increase speed control responsiveness in each of the sections. Reduce
the gain and increase the integral time if vibration or oscillation occurs.
Inertia Compensation (CLV and CLV/PM)
■
Inertia compensation can be used to eliminate motor speed overshoot at the end of acceleration or undershoot at the end of
deceleration caused by the system inertia. Adjust the function following the steps below.
1.
Properly adjust the speed control loop parameters (C5-).
2.
Set parameter n5-01 to 1 to enable inertia compensation.
3.
Calculate and set n5-02 and n5-03 as follows:
Motor Acceleration Time n5-02
Inertia Compensation Gain
n5-03
<1> Insert 0 kg for the load to calculate the lowest setting, insert the elevator rated load to calculate the maximum setting for n5-03. Use the lower
setting for initial trials.
4.
Change the setting of n5-03 within the limits calculated in step 3 until the desired performance is achieved.
If possible, trace the output speed after soft starter (U1-16) and the motor speed (U1-05) values. Increase n5-03
if the motor speed does not follow the speed after soft start. Decrease n5-03 if the motor overshoots the
designated speed at the end of acceleration or undershoots the speed at the end of deceleration.
■ Adjusting Position Lock at Start (CLV/PM)
Set the S3- and C5- parameters as described below in order to reduce rollback effects at start.
• With the elevator car unloaded, adjust the speed loop gain (C5-19) and integral time for Position Lock (C5-20). Increase
the gain and reduce the integral time in order to reduce the rollback of the car. Set parameters C5-19 and
C5-20 in the opposite way if vibration occurs.
• Adjust the Position Lock at start gain 2 (S3-02). Increase S3-02 if rollback occurs, decrease S3-02 it if vibration occurs.
• If the elevator is balanced and oscillation at start occurs, attempt gradually increasing the setting in S3-40 in increments
of one pulse.
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
for further descriptions on how to resolve riding comfort problems.
π
n
r_Mot
n5-02 = J
30 T
Mot
r_Mot
30 v
2
ΣJ = J + Σm
r_Elev
i 2
π n
TS
r_Mot
n5-03 = ΣJ / J
Mot
4.6 Setup Procedure for Elevator Applications
• J - Motor inertia in kgm 2
Mot
• n - Rated motor speed in min -1
r_Mot
• T - Rated motor torque in Nm
r_Mot
• J - Traction sheave inertia in kgm 2
TS
• i - Gear ratio (n /n )
Load Mot
• v - Rated elevator speed in m/s
r_Elev
• Σm - Mass of all moved parts (car, counterweight, ropes, load
Riding
) in kg
<1>
4
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