Fuzzy most suitable acceleration and deceleration
Fuzzy acceleration and deceleration function eliminates setting of
acceleration and deceleration time in using inverter.
Inverter acceleration time should be set every time before, but this
function applies the theory of fuzzy, using inverter capability at its
maximum, can set acceleration and deceleration time automatically.
The acceleration time is, a time for acceleration at the current specified by the overload restriction constant
when it is valid, and a time for acceleration within 150% of the reqular current when it is invalid.
The deceleration time is a time for decelerating so that the current does not exceed 150% of the specified one
of the DC voltage in the inverter curcuit does not exceed 358V (770V for the 400V class).
The function sets the acceleration and deceleration time automatically in response to a change in the load or
inertia in real time.
Precautions
(1) This function is not suitable for a machine which requires a constant acceleration and deceleration time.
The acceleration and deceleration time varies with the magnitude of the load or inertia.
(2) When the inertia of machine is more than about 20 times of the motor shaft, a trip may occur.
(3) The acceleration and deceleration time of the same motor always varies with a change of the current.
(4) The fuzzy most suitable acceleration and deceleration setting function is valid only the V/F control.
(5) If the jogging running is executed when the fuzzy most suitable acceleration and deceleration setting function
is selected, the normal jogging operation cannot be performed due to the fuzzy acceleration.
(6) When the load is more than the rated one, the deceleration time may be increased.
(7) When the acceleration and deceleration are repeated frequently, a trip may occur.
(8) If an internal regenerating braking circuit is used, or an external braking unit is used, the moter cannot stop
within the deceleration time set with a braking resistor. In this case, do not use the fuzzy suitable acceleration
and deceleration function.
(9) When using on class low motor against the inverter. Validate overload restriction function, than set the
overload restriction level 1.5 times as high as rated output current of motor.
Principle
The acceleration and deceleration speed is set acceleration with the fuzzy rule from the distance to the overload
restriction level and the start slopes of current and voltage.
Set item
Running mode
selection
Function code
A085
Data
00
01
02
Contents
Normal running
Energy conservation running
Fuzzy running
A044/A244/A344:1 /2 /3 control method
A085 : Running mode selection
b021/b024:Overload restriction
selection 1/2
b021/b024:Overload restriction level 1/2
st
nd
rd
Relation code
N300 INSTRUCTION MANUAL
Chapter 4 Explanation of function
Summary of Contents for hiRUN N300-055H
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