Mitsubishi Electric FR-E800 Instruction Manual page 444

Pr. Name
Second motor induced
1413
voltage constant (phi f)
C235
exponent
739 Second motor Ld decay
C231 ratio
740 Second motor Lq decay
C232 ratio
Second motor starting
741
resistance tuning
C282
compensation coefficient 1
742 Second motor magnetic
C285 pole detection pulse width
746 Second motor protection
C233 current level
*1 The setting range for the 575 V class is "0, 3, 5, 6, 10, 13, 15, 16, 30, 33, 8090, 8093, 9090, and 9093".
*2 The initial value for the FR-E820-0050(0.75K) or lower, FR-E840-0026(0.75K) or lower, FR-E860-0017(0.75K), FR-E820S-0050(0.75K) or lower,
FR-E810W-0050(0.75K) or lower, and FR-E846-0026(0.75K) is set to the 85% of the inverter rated current.
*3 The initial value differs according to the voltage class (100/200 V, 400 V, or 575 V).
*4 The setting range and unit change according to the Pr.71 (Pr.450) setting.
*5 When the MM-GKR or EM-A motor is used, the offline auto tuning cannot be performed.
*6 The value is valid only when the FR-E820-0080(1.5K) or lower, the FR-E820S-0080(1.5K) or lower, or FR-E810W-0050(0.75K) or lower is used
and Pr.80 (Pr.453) ≤ 0.75 kW. Under other conditions, "SE" (Incorrect parameter setting) is displayed when the start command is turned ON.
*7 The value is valid in any of the following conditions. Under other conditions, "SE" (Incorrect parameter setting) is displayed when the start
command is turned ON.
The FR-E820-0470(11K) or lower is used and Pr.80 (Pr.453) ≤ 7.5 kW.
The FR-E840-0230(11K) or lower is used and Pr.80 (Pr.453) = 0.4 to 7.5 kW.
The FR-E820S-0110(2.2K) or lower is used and Pr.80 (Pr.453) ≤ 2.2 kW.
The FR-E810W-0050(0.75K) or lower is used and Pr.80 (Pr.453) ≤ 0.75 kW.
The FR-E846-0095(3.7K) or lower is used and Pr.80 (Pr.453) = 2.2 or 3.7 kW.
*8 200% when a motor other than the MM-GKR or EM-A is used.
*9 When "9999" is set in any parameter from Pr.979 to Pr.981, the position accuracy compensation function is disabled.
• The settings are valid under PM sensorless vector control.
• The offline auto tuning enables the operation with IPM motors and SPM motors. (When a PM motor other than the MM-GKR
or EM-A is used, always perform offline auto tuning.)
• Tuning is not available for S-PM geared motors (GV-S series).
• Even when the MM-GKR or EM-A motor is used, offline auto tuning is required when the wiring length is long (exceeding 30
m as a reference), when the wiring length is changed, or when positioning accuracy for the EM-A motor need to be improved.
• Tuning is enabled even when a load is connected to the motor.
• Reading/writing of the motor constants tuned by offline auto tuning are enabled.
• The offline auto tuning status can be monitored on the operation panel or the parameter unit.
 Before performing offline auto tuning
Check the following points before performing offline auto tuning:
• Check that PM sensorless vector control is selected. Note that the motor constant tuning is invalid during position control.
(Refer to page 115.)
• Check that a motor is connected. (Check that the motor is not rotated by an external force during tuning.)
• Select a motor with the rated current equal to or less than the inverter rated current.
If a motor with substantially low rated current compared with the inverter rated current is used, speed and torque
accuracies may deteriorate due to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter
rated current. (For details on the inverter rated current, refer to the inverter rated specifications in the Instruction Manual
(Connection).)
• The maximum frequency under PM sensorless vector control is 400 Hz.
• Tuning is enabled even when a load is connected to the motor. The motor may run slightly. Fix the motor securely with a
mechanical brake, or before tuning, make sure that it is safe even if the motor rotates. (Caution is required especially in
vertical lift applications.) Note that even if the motor runs slightly, tuning performance is unaffected.
• It is recommended that the position accuracy compensation gain tuning is performed for the motor alone. Tuning is not
available under certain load conditions, such as when the motor shaft is locked or when the inertia is too large.
Initial
Setting range
value
0 to 2
9999
9999
9999 0% to 100%, 9999
9999 0% to 100%, 9999
9999 0% to 200%, 9999
9999 0 to 6000 μs, 9999
100% to 500%
9999
9999
Description
Set the exponent n when the induced voltage constant phi
n
f (Pr.738) is multiplied by 10 .
No exponent setting
Tuning data of the second motor.
(The value measured by offline auto tuning is automatically
set.)
9999: Inverter internal data is used.
Set the maximum current (OCT) level of the second motor.
*8
230%
14. (C) Motor Constant Parameters
14.3 Offline auto tuning for a PM motor
11
12
13
14
15
16
17
18
19
20
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