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Mitsubishi Electric FR-E520 Instruction Manual Page 144

Transistorized inverter.
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<Setting the motor constant as desired>
! To set the motor constant without using the offline auto tuning data
<Operating procedure>
1. Set any of the following values in Pr. 71:
Setting
Constant-torque motor
By setting any of "105 to 116", the electronic thermal relay function changes to the
thermal characteristics of the constant-torque motor when the RT signal switches on.
2. Set "801" in Pr. 77.
(Only when the Pr. 80 setting is other than "9999", the parameter values of the
motor excitation current (Pr. 82) and motor constant (Pr. 90) can be displayed.
Though the parameters other than Pr. 82 and Pr. 90 can also be displayed, they
are parameters for manufacturer setting and their values should not be changed.)
3. In the parameter setting mode, read the following parameters and set desired
values:
Parameter
Number
Motor excitation
82
Motor constant
90
4. Return the Pr. 77 setting to the original value.
5. Refer to the following table and set Pr. 84:
Parameter
Number
Rated motor
84
Note: 1. The Pr. 90 value may only be read when general-purpose magnetic flux
vector control has been selected.
2. Set "9999" in Pr. 90 to use the standard motor constant (including that for the
constant-torque motor).
3. If "star connection" is mistaken for "delta connection" or vice versa during
setting of Pr. 71, general-purpose magnetic flux vector control cannot be
exercised normally.
Standard motor
Name
Setting Range
0 to 500A, 9999
current
0 to 50Ω, 9999
(R1)
Name
Setting Range
50 to 120Hz
frequency
Star Connection
Motor
5 or 105
15 or 115
Setting
Increments
0.01A
0.001Ω
Setting
Increments
0.01Hz
134
PARAMETERS
Delta Connection
Motor
6 or 106
16 or 116
Factory
Setting
9999
9999
Factory
Setting
60Hz

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