Excitation Current Low-Speed Scaling Factor - Mitsubishi Electric FR-A800 Series Instruction Manual

5.16.4 Excitation current low-speed scaling factor

Magnetic flux Magnetic flux Sensorless Magnetic flux Sensorless Sensorless
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.
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 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
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).
• When Pr.14 = "14 or 15" and the X17 signal is turned ON, the excitation current scaling factor is switched from the value
set in Pr.617 to the value set in Pr.86.
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Name Initial value Setting range
0
9999
9999
9999
9999
9999
Excitation current scaling factor
Pr.86
(Pr.566)
100%
0
(Pr.565)
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Excitation current low-speed scaling factor: Pr.86
0 to 5
Refer to page 708
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
Reverse rotation excitation current low-speed scaling factor: Pr.617
14
(X17-OFF), Pr.86 (X17 signal-ON)
Forward rotation excitation current low-speed scaling factor: Pr.617
*1
(X17-OFF), Pr.86 (X17 signal-ON)
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.
Pr.85
Output frequency
Description
for details on the operation under V/F control.
page 708.)
5. PARAMETERS
5.16 (G) Control parameters
1
2
3
4
5
6
7
8
9
10
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