PARAMETERS
116
<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:
Star Connection
Motor
Delta Connection
Motor
Standard motor
5 or 105
6 or 106
Setting
Constant-torque
motor
15 or 115
16 or 116
By setting any of "105 to 116", the electronic overcurrent protection 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 exciting 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
Name
Setting Range
Setting
Increments
Factory
Setting
82
Motor exciting
current
0 to 500A,
9999
0.01A
9999
90
Motor constant
(R1)
0 to 10
Ω
, 9999
0.001
Ω
9999
4. Return the Pr. 77 setting to the original value.
5. Refer to the following table and set Pr. 84:
Parameter
Number
Name
Setting Range
Setting
Increments
Factory
Setting
84
Rated motor
frequency
50 to 120Hz
0.01Hz
50Hz
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.
