YASKAWA Varispeed G7 Series

5 -72
Speed Estimation: N4
User constants for speed estimation are shown in the following table.
N3-03
High-slip
braking stop
dwell time
Set in seconds the dwell time
for the output frequency for
FMIN (1.5 Hz) during V/f
control.
Effective only during deceler-
ation for high-slip braking.
0.0 to
10.0
1.0 s No A A No No No 58AH –
HSB Dwell
Time
N3-04
High-slip
braking OL
time
Set the OL time when the out-
put frequency does not
change for some reason
during deceleration for high-
slip braking.
30 to
1200
40 s No A A No No No 58BH –
HSB OL
Time
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Regis-
ter
Page
Display
V/f
V/f
with
PG
Open
Loop
Vec-
tor
1
Flux
Vec-
tor
Open
Loop
Vec-
tor
2
N4-07
Integral time
of speed
estimator
Set the integral time of the
speed estimator for PI con-
trol.
0.000
to
9.999
0.060
ms
No No No No No A 59AH 4-31
SPD EST I
Time
0.030
ms
N4-08
Proportional
gain of speed
estimator
Set the proportional gain of
the speed estimator for PI
control.
0 to
1000
15 No No No No No A 59BH –
SPD EST P
GAIN
N4-10
High-speed
proportional
gain of speed
estimator
Set the high-speed propor-
tional gain of the speed esti-
mator for PI control.
0 to
1000.0
15.0 No No No No No A 59DH 4-31
OBS Gain H-
SPD
N4-11
Speed estima-
tor switching
frequency
Set the switching frequency
of high-speed/low-speed
operation for the speed esti-
mator.
40 to
70
70 Hz No No No No No A 59EH
7-35
10-4
Speed
Change F
N4-15
Low-speed
regeneration
stability
coefficient 1
Increase this setting if a
higher power for low-speed
regeneration is required. If
the setting is too large, the
torque reference monitor and
the actual torque accuracy
may deteriorate.
0.0 to
3.0
0.3 No No No No No A 5A2H 7-35
LowSpd Rgn
Coef1
N4-17
Torque
adjustment
gain
Set the torque adjustment
gain for low-speed power.
0.0 to
5.0
0.8 No No No No No A 5A4H 7-35
TRQ adjust
gain
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Regis-
ter
Page
Display
V/f
V/f
with
PG
Open
Loop
Vec-
tor
1
Flux
Vec-
tor
Open
Loop
Vec-
tor
2
TOE-S616-60.1.book 72 ページ ２０１７年８月４日 金曜日 午後３時４１分