Yaskawa Z1000 AC Drive HVAC - Manual (Page 297)

u n8: PM Motor Control Tuning
No.
(Addr.
Hex)
Name LCD Display Description Values Page
n8-45
(538)
Speed Feedback
Detection Control Gain PM Spd Fdbk Gain
OLV/PM OLV/PM
Increase this setting if hunting occurs. Decrease to lower the
response.
Default: 0.80
Min.: 0.00
Max.: 10.00
–
n8-47
(53A)
Pull-In Current
Compensation Time
Constant
PM Pull-in I Tc
OLV/PM OLV/PM
Sets the time constant to make the pull-in current reference and
actual current value agree. Decrease the value if the motor
begins to oscillate, and increase the value if it takes too long for
the current reference to equal the output current.
Default: 5.0 s
Min.: 0.0
Max.: 100.0
–
n8-48
(53B)
Pull-In Current PM No-load Curr
OLV/PM OLV/PM
Defines the d-Axis current reference during no-load operation
at a constant speed. Set as a percentage of the motor rated
current. Increase this setting if hunting occurs while running at
constant speed.
Default: 30%
Min.: 20
Max.: 200
–
n8-49
(53C)
d-Axis Current for High
Efficiency Control
EnergySav ID Lvl
OLV/PM OLV/PM
Sets the d-Axis current reference when running a high load at
constant speed. Set as a percentage of the motor rated current.
Default: <1>
Min.: -200.0%
Max.: 0.0%
–
n8-51
(53E)
Acceleration/
Deceleration Pull-In
Current
PM Pull-in I@Acc
OLV/PM OLV/PM
Sets the d-Axis current reference during acceleration/
deceleration as a percentage of the motor rated current. Set to a
high value when more starting torque is needed.
Default: 50%
Min.: 0
Max.: 200
–
n8-54
(56D)
Voltage Error
Compensation Time
Constant
PM V Error CompT
OLV/PM OLV/PM
Adjusts the value when hunting occurs at low speed. If hunting
occurs with sudden load changes, increase n8-54 in increments
of 0.1. Reduce this setting if oscillation occurs at start.
Default: 1.00 s
Min.: 0.00
Max.: 10.00
–
n8-55
(56E)
Load Inertia
PMLoad wk2 Ratio
0: Less than 1:10
1: 1:10 to 1:30
2: 1:30 to 1:50
3: More than 1:50
OLV/PM OLV/PM
Sets the ratio between motor and machine inertia.
0: Lower than 1:10
1: Between 1:10 to 1:30
2: Between 1:30 to 1:50
3: Higher than 1:50
Default: 0
Min.: 0
Max.: 3
–
n8-62
(57D)
Output Voltage Limit PM Vout Limit
OLV/PM OLV/PM
Prevents output voltage saturation. Should be set just below the
voltage provided by the input power supply.
Default: 575.0 V
Min.: 0.0
Max.: 661.3
–
n8-65
(65C)
Speed Feedback
Detection Control Gain
during ov Suppression
SFdbk G @OV Supp
OLV/PM OLV/PM
Sets the gain used for internal speed feedback detection during
ov suppression.
Default: 1.50
Min.: 0.00
Max.: 10.00
–
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
B.9 n: Special Adjustment
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 297
B
Parameter List