Mitsubishi Electric FR-F800 Series Instruction Manual page 556

5.13.4 Excitation current low-speed scaling factor
Magnetic flux Magnetic flux Magnetic flux
Under Advanced magnetic flux vector control, the excitation current scaling factor in the low-speed range can be adjusted.
Pr.
14
Load pattern selection
G003
85 Excitation current break
G201 point
86 Excitation current low-
G202 speed scaling factor
Reverse rotation excitation
617
current low-speed scaling
G080
factor
565 Second motor excitation
G301 current break point
Second motor excitation
566
current low-speed scaling
G302
factor
*1 The function is enabled under Advanced magnetic flux 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, 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
break point. The excitation current scaling factor at 0 Hz is set in Pr.86 Excitation current low-speed scaling factor.
Use Pr.565 Second motor excitation current break point and Pr.566 Second motor excitation current low-speed
scaling factor for the setting for using the second motor (RT signal-ON).
Downloaded from ManualsNet.com
Name Initial value Setting range
0
9999
9999
9999
9999
9999
Excitation current scaling factor
Pr.86
(Pr.566)
100%
0
(Pr.565)
search engine
Excitation current low-speed scaling factor: Pr.86
0, 1
Refer to page 554
Forward rotation excitation current low-speed scaling factor: Pr.86
*1
12
Reverse rotation excitation current low-speed scaling factor: Pr.617
Forward rotation excitation current low-speed scaling factor: Pr.617
*1
13
Reverse rotation excitation current low-speed scaling factor: Pr.86
Forward rotation excitation current low-speed scaling factor: Pr.86
*1
14
Reverse rotation excitation current low-speed scaling factor: Pr.617
Forward rotation excitation current low-speed scaling factor: Pr.617
*1
15
Reverse rotation excitation current low-speed scaling factor: Pr.86
0 to 400 Hz Set the frequency at which increased excitation is started.
SF-PR/SF-HR/SF-HRCA motor: The predetermined frequency is
9999 applied.
Motor other than the above: 10 Hz is applied.
0% to 300% Set an excitation current scaling factor at 0 Hz.
SF-PR/SF-HR/SF-HRCA motor: The predetermined scaling factor
9999 is applied.
Motor other than the above: 130% is applied.
Set an excitation current scaling factor when different excitation
0% to 300%
current scaling factors are used for forward and reverse rotation.
SF-PR/SF-HR/SF-HRCA motor: The predetermined scaling factor
9999 is applied.
Motor other than the above: 130% is applied.
0 to 400 Hz Set an excitation current break point when the RT signal is ON.
SF-PR/SF-HR/SF-HRCA motor: The predetermined frequency is
9999 applied.
Motor other than the above: 10 Hz is applied.
Set an excitation current low-speed scaling factor when the RT
0% to 300%
signal is ON.
SF-PR/SF-HR/SF-HRCA motor: The predetermined scaling factor
9999 is applied.
Motor other than the above: 130% is applied.
page 554.)
Pr.85
Output frequency
Description
for details of the operation under V/F control.
5. PARAMETERS
5.13 (G) Control parameters
1
2
3
4
5
6
7
8
9
10
555