YASKAWA Varispeed G7 Series User Manual

6 -40
Normally, there is no need to make this setting. Adjust the constant as shown below.
• If the motor is vibrating, increase the set value.
• If the motor response is low, decrease the set value.
 Starting Torque Compensation
Starting torque compensation can be input during open-loop vector control to increase the torque reference
even faster when starting the motor.
Starting torque compensation is effective when starting torque is required for machines with a high frictional
load and cranes. However, starting torque compensation differs from flux vector control in that compensation
is provided only when starting the motor.
Related Constants
Fig 6.34 Starting Torque Compensation Timing Chart
•
When using this function, set the starting torque compensation amount to the frictional load for a normal
machine or to the load for an elevating machine, such as a crane.
• Frictional load: Set both C4-03 and C4-4 to the amount of friction.
Constant
Number
Name
Description
Setting
Range
Fac-
tory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Regis-
ter
Page
V/f
V/f
with
PG
Open-
Loop
Vector 1
Flux
Vector
Open-
Loop
Vector 2
Display
C4-03
Forward start-
ing torque
Sets the forward start-
ing torque as a percent-
age of the motor rated
torque.
0.0 to
200.0
0.0% × × × A × × 217H –
F TorqCmp@
start
C4-04
Reverse start-
ing torque
Sets the reverse starting
torque as a percentage
of the motor rated
torque.
-200.0
to 0.0
0.0% × × × A × × 218H –
R TorqCmp@
start
C4-05
Starting torque
time constant
Sets the delay time in
ms for the starting
torque.
The filter is disabled if
the time is set to 0 to 4
ms.
0 to
200
10 ms × × × A × × 219H –
TorqCmp
Delay T
E1−09
C4−05 × 4
C4-03 (forward) C4-03 (forward) C4-03 (forward)
C4-04 (reverse, negative polarity)C4-04 (reverse, negative polarity)C4-04 (reverse, negative polarity)
Larger of b2-01 and E1-09
Output frequency
T
ime constant: C4-05
Closed
Open
Forward (reverse) run
command (S1 (S2))
Torque compensation
amount
T
ime constant:
C4-02
Master speed reference
(A1)
Note The above torque compensation amount lower limit is applied to the Inverter’s torque reference value.
TOE-S616-60.1.book 40 ページ ２０１７年８月４日 金曜日 午後３時４１分

YASKAWA Varispeed G7 Series Specifications

General

Brand	YASKAWA
Model	Varispeed G7 Series
Category	Inverter
Language	English