Excitation Current Low-Speed Scaling Factor - Mitsubishi Electric 800 Series Instruction Manual

5.16.4

Excitation current low-speed scaling factor

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