Excitation Current Low-Speed Scaling Factor - Mitsubishi Electric FR-F820-00046 Instruction Manual

Fr-f800 series
Hide thumbs Also See for FR-F820-00046:
Table of Contents

Advertisement

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.
Name
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).
Excitation current scaling factor
Initial value Setting range
0, 1
*1
12
*1
0
13
*1
14
*1
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 530
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
Forward rotation excitation current low-speed scaling factor: Pr.617
Reverse rotation excitation current low-speed scaling factor: Pr.86
Set the frequency at which increased excitation is started.
SF-PR/SF-HR/SF-HRCA motor: The predetermined frequency is
applied.
Motor other than the above: 10 Hz is applied.
Set an excitation current scaling factor at 0 Hz.
SF-PR/SF-HR/SF-HRCA motor: The predetermined scaling factor
is applied.
Motor other than the above: 130% is applied.
Set an excitation current scaling factor when different excitation
current scaling factors are used for forward and reverse rotation.
SF-PR/SF-HR/SF-HRCA motor: The predetermined scaling factor
is applied.
Motor other than the above: 130% is applied.
Set an excitation current break point when the RT signal is ON.
SF-PR/SF-HR/SF-HRCA motor: The predetermined frequency is
applied.
Motor other than the above: 10 Hz is applied.
Set an excitation current low-speed scaling factor when the RT
signal is ON.
SF-PR/SF-HR/SF-HRCA motor: The predetermined scaling factor
is applied.
Motor other than the above: 130% is applied.
page
530.)
Output frequency
531
5. PARAMETERS
5.13 (G) Control parameters
1
2
3
4
5
6
7
8
9
10

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents