Gain Adjustment Of Current Controllers For The D Axis And The Q Axis - Mitsubishi Electric FR-A800 Series Instruction Manual

Pr.
854
Excitation ratio
G217
Excitation ratio
[%]
100
(Initial value)
Pr.854
setting
0
NOTE
• When excitation ratio is reduced, output torque startup is less responsive.
• The setting of Pr.854 is invalid if Pr.858 Terminal 4 function assignment or Pr.868 Terminal 1 function assignment is set
to "1" (flux command according to terminal).
5.6.3
PM PM PM
The gain of the current controller can be adjusted.
Pr.
824 Torque control P gain 1 (current
G213 loop proportional gain)
825 Torque control integral time 1
G214 (current loop integral time)
• Use Pr.824 Torque control P gain 1 (current loop proportional gain) to adjust the proportional gain of current
controllers for the d axis and the q axis. The 100% gain is equivalent to 1000 rad/s. Setting this parameter higher improves
the trackability for current command changes. It also reduces the current fluctuation caused by external disturbances.
• Use Pr.825 Torque control integral time 1 (current loop integral time) to set the integral time of current controllers for
the d axis and the q axis. If the setting value is small, it produces current fluctuation against external disturbances,
decreasing time until it returns to original current value.
NOTE
• Pr.834 Torque control P gain 2 (current loop proportional gain) and Pr.835 Torque control integral time 2 (current loop
integral time) are valid when the RT signal turns ON.
In this case, replace them for Pr.824 and Pr.825 in the description above.
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Name Initial value
100%
100
Gain adjustment of current controllers for the d
axis and the q axis
Name
100%
5 ms
5.6 Adjustment during Real sensorless vector control, Vector control, PM sensorless vector control
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Setting
range
0 to 100% Set an excitation ratio when there is no load.
Load[%]
Initial Setting
value range
0% to 500% The proportional gain of the current controller is set.
0 to 500 ms The integral time of the current controller is set.
Description
Description
5. PARAMETERS
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2
3
4
5
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7
8
9
10
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