100
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
(5) Variable-torque acceleration/deceleration (
Pr.29
= "6")
⋅
This function is useful for variable-torque load such as a fan and blower to
accelerate/decelerate in short time.
In areas where output frequency > base frequency, the speed accelerates/
decelerates linearly.
CAUTION
Setting the backlash measures increases the acceleration/deceleration time by the stopping time.
♦
Parameters referred to
♦
Pr. 3 Base frequency
Refer to page 84
Pr. 7 Acceleration time, Pr. 8 Deceleration time, Pr. 20 Acceleration/deceleration reference frequency
Refer to page 96
Pr. 14 Load pattern selection
Refer to page 86
Setting value "6"
[Variable-torque
acceleration/deceleration]
Pr.3
Base frequency
Setting
frequency
Pr.7 Acceleration time
Time
Pr.8 Deceleration time
CAUTION
⋅
As the acceleration/deceleration time of variable-torque acceleration/deceleration,
set the time taken to reach
Pr. 3 Base frequency
, not
Pr. 20 Acceleration/deceleration
reference frequency
.
REMARKS
⋅
When the base frequency is not 45 to 65Hz, the speed accelerates/decelerates
linearly even though
Pr. 29
= "6".
⋅
Variable-torque acceleration/deceleration overrides
Pr. 14
= "1" setting (for variable-
torque load). Thus, when
Pr. 14
= "1" while variable-torque acceleration/deceleration is
valid, inverter operates as
Pr. 14
= "0" (for constant-torque load).