N: Special Adjustment; N: Special Adjustment; N1: Hunting Prevention; N3: Overexcitation Braking - YASKAWA Z1000U Series Programming Manual

A.11 n: Special Adjustment
A.11 n: Special Adjustment
The n parameters adjust more advanced performance characteristics such as Hunting Prevention, speed feedback detection,
High Slip Braking, and Online Tuning for motor line-to-line resistance.
u

n1: Hunting Prevention

No.
(Addr. Name
Hex)
n1-01 Hunting Prevention
(0580) Selection
n1-02 Hunting Prevention
(0581) Gain Setting
n1-03 Hunting Prevention
(0582) Time Constant
n1-05 Hunting Prevention
(0530) Gain while in Reverse
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
u

n3: Overexcitation Braking

No.
(Addr. Name
Hex)
n3-13 Overexcitation
(0531) Deceleration Gain
u

n8: PM Motor Control Tuning

No.
(Addr. Name
Hex)
n8-45 Speed Feedback
(0538) Detection Control Gain
Pull-In Current
n8-47
Compensation Time
(053A)
Constant
n8-48
(053B) Pull-In Current
n8-49 d-Axis Current for High
(053C) Efficiency Control
Acceleration/
n8-51
Deceleration Pull-In
(053E)
Current
Voltage Error
n8-54
Compensation Time
(056D)
Constant
234
LCD Display
Hunt Prev Select 0: Disabled
0: Disabled 1: Enabled
1: Enabled
If the motor vibrates while lightly loaded, increase the gain by
Hunt Prev Gain 0.1 until vibration ceases. If the motor stalls, decrease the gain
by 0.1 until the stalling ceases.
Sets the time constant used for Hunting Prevention.
Hunt Prev Time
Sets the gain used for Hunting Prevention. If set to 0, the gain
Hprev Gain @Rev set to n1-02 is used for operation in reverse.
LCD Display
Sets the gain applied to the V/f pattern during Overexcitation
Hflux Brake Gain Deceleration (L3-04 = 4).
LCD Display
OLV/PM OLV/PM
PM Spd Fdbk Gain
Increase this setting if hunting occurs. Decrease to lower the
response.
OLV/PM OLV/PM
Sets the time constant to make the pull-in current reference and
PM Pull-in I Tc
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.
OLV/PM OLV/PM
Defines the d-Axis current reference during no-load operation
PM No-load Curr
at a constant speed. Set as a percentage of the motor rated
current. Increase this setting if hunting occurs while running at
constant speed.
OLV/PM OLV/PM
EnergySav ID Lvl
Sets the d-Axis current reference when running a high load at
constant speed. Set as a percentage of the motor rated current.
OLV/PM OLV/PM
Sets the d-Axis current reference during acceleration/
PM Pull-in I@Acc
deceleration as a percentage of the motor rated current. Set to a
high value when more starting torque is needed.
OLV/PM OLV/PM
Adjusts the value when hunting occurs at low speed. If hunting
PM V Error CompT
occurs with sudden load changes, increase n8-54 in increments
of 0.1. Reduce this setting if oscillation occurs at start.
YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual
Description
Description
Description
Values Page
Default: 1
129
Range: 0, 1
Default: 1.00
Min.: 0.00 129
Max.: 2.50
<1>
Default:
129
Min.: 0 ms
Max.: 500 ms
Default: 0.00
Min.: 0.00 129
Max.: 2.50
Values Page
Default: 1.10
Min.: 1.00 130
Max.: 2.00
Values Page
Default: 0.80
Min.: 0.00 131
Max.: 10.00
Default: 5.0 s
Min.: 0.0 131
Max.: 100.0
Default: 30%
Min.: 20 131
Max.: 200
<1>
Default:
131
Min.: -200.0%
Max.: 0.0%
Default: 50%
Min.: 0 131
Max.: 200
Default: 1.00 s
Min.: 0.00 131
Max.: 10.00