Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 596 / 727

(G) Control parameters
PARAMETERS
595
5
GROUP
G
5.16.4
Excitation current low-speed scaling factor
Under Advanced magnetic flux vector control or Real sensorless vector control, the excitation current scaling factor in the low-
speed range can be adjusted.

The setting is valid only under Advanced magnetic flux vector control or Real sensorless vector control. When Pr.14 = "12 to 15" and V/F control
is selected, the operation is the same as the one for constant-torque load ( Pr.14 = "0"). (Refer to page 593 .)
• Under Advanced magnetic flux vector control or Real sensorless vector control, excitation current in the low-speed range
can be increased to improve torque. When Pr.14 = "12 to 15", the excitation current scaling factor can be switched for the
forward/reverse rotation.
• Increased excitation is applied when the output frequency is equal to or lower than the setting in Pr.85 Excitation current
refraction point . The excitation current scaling factor at 0 Hz is set in Pr.86 Excitation current low speed multiplying
factor . Use Pr.565 Second motor excitation current refraction point and Pr.566 Second motor excitation current low
speed scaling factor for the setting for using the second motor (RT signal-ON).
Pr. Name
Initial
value Setting
range
Description
14
G003
Load pattern selection
0
0 to 5
Excitation current low-speed scaling factor: Pr.86
Refer to page 593 for details of the operation under V/F control.
12

Forward rotation excitation current low-speed scaling factor: Pr.86
Reverse rotation excitation current low-speed scaling factor:
Pr.617
13

Forward rotation excitation current low-speed scaling factor:
Pr.617
Reverse rotation excitation current low-speed scaling factor: Pr.86
14

Forward rotation excitation current low-speed scaling factor: Pr.86
Reverse rotation excitation current low-speed scaling factor:
Pr.617 (X17-OFF), Pr.86 (X17 signal-ON)
15

Forward rotation excitation current low-speed scaling factor:
Pr.617 (X17-OFF), Pr.86 (X17 signal-ON)
Reverse rotation excitation current low-speed scaling factor: Pr.86
85
G201 Excitation current
refraction point
9999
0 to 400 Hz Set the frequency at which increased excitation is started.
9999 10 Hz is applied.
86
G202
Excitation current low
speed multiplying
factor
9999
0 to 300% Set an excitation current scaling factor at 0 Hz.
9999 130% is applied.
617
G080
Reverse rotation
excitation current low-
speed scaling factor
9999
0 to 300%
Set an excitation current scaling factor when different excitation
current scaling factors are used for forward and reverse rotation.
9999 130% is applied.
565
G301
Second motor
excitation current
refraction point
9999
0 to 400 Hz Set an excitation current break point when the RT signal is ON.
9999 10 Hz is applied.
566
G302
Second motor
excitation current low
speed scaling factor
9999
0 to 300%
Set an excitation current low-speed scaling factor when the RT
signal is ON.
9999 130% is applied.
Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless
Excitation current scaling factor
100%
0
Output frequency
Pr.86
(Pr.566)
Pr.85
(Pr.565)