4-21
4-2 Function Mode
4
Func
tions
Automatic Torque Boost
• If the automatic torque boost is selected in the torque boost selection (A041/A241: 01), it operates
to adjust the output frequency and voltage automatically, depending on the load level.
(In actual control, the automatic torque boost is used along with the manual torque boost.)
• To select the automatic torque boost, set motor capacity selection H003/H203 and motor pole
number selection H004/H204 correctly according to your motor.
• To avoid a possible overcurrent trip during deceleration, set the AVR selection to "Always ON"
(A081: 00).
• If the automatic torque boost cannot provide the desired characteristics, adjust each item, as
shown in the following table.
Control Method (V/f Characteristics)
You can set V/f characteristics (output voltage/output frequency).
* To switch to the 2nd/3rd control, allocate 08 (SET)/17 (SET3) to the desired multi-function input and then turn it
on.
*1. Refer to "Sensorless Vector Control" (page 4-113).
*2. Refer to "0-Hz Sensorless Vector Control" (page 4-114).
Phenomenon
Adjusting method
Adjustment item
Insufficient torque at low
speed
(Motor does not run at low
speed.)
Gradually increase the voltage setting of the manual torque boost.
A042/A242
Gradually increase the slip compensation gain of the automatic
torque boost.
A047/A247
Gradually increase the voltage compensation gain of the automatic
torque boost.
A046/A246
Reduce the set value of the carrier frequency.
b083
Rotation speed lowers
when load is applied.
Gradually increase the slip compensation gain of the automatic
torque boost.
A047/A247
Rotation speed increases
when load is applied.
Gradually reduce the slip compensation gain of the automatic torque
boost.
A047/A247
Overcurrent trip occurs
when load is applied.
Gradually reduce the voltage compensation gain of the automatic
torque boost.
A046/A246
Gradually reduce the slip compensation gain of the automatic torque
boost.
A047/A247
Gradually reduce the voltage setting of the manual torque boost.
A042/A242
Parameter No.
Function name
Data
Default setting
Unit
A044
V/f characteristics
selection
00: Constant torque characteristics (VC)
01: Special reduced torque
characteristics (Special VP)
02: Free V/f characteristics
(Only A044/A244 can be set.)
03: Sensorless vector control (SLV)
(Only A044/A244 can be set.
*1
)
04: 0-Hz sensorless vector control
(Only A044/A244 can be set.
*2
)
05: Sensor vector control (V2)
(Only A044 can be set.)
00
⎯
A244
*2nd V/f characteristics
selection
A344
*3rd V/f characteristics
selection
Related functions
A046, A246, A047, A247, A082, H003, H203, H004, H204
Summary of Contents for 3G3RX Series
Page 1: ...Cat No I560 E1 03 USER S MANUAL SYSDRIVE RXSERIES High function General purpose Inverter ...
Page 2: ......
Page 17: ...Chapter 1 Overview 1 1 Functions 1 1 1 2 Appearance and Names of Parts 1 4 ...
Page 22: ......
Page 23: ...Chapter 2 Design 2 1 Installation 2 1 2 2 Wiring 2 6 ...
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Page 337: ...Chapter 6 Inspection and Maintenance 6 1 Inspection and Maintenance 6 1 ...
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Page 437: ...Index ...
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