Instruction manual

44
Select slip compensation status during regeneration
•
Motor parameter calculation
The following shows an example of motor parameter calculation:
(1) Motor rated slip (n106)
(2) Motor resistance for one phase (n107)
Calculations are based on line-to-line resistance and insulation grade of the motor
test report.
(E type insulation) Test report of line-to-line resistance at 75
°
C (
Ω) x 0.92 x 1/2
(B type insulation) Test report of line-to-line resistance at 75
°
C (
Ω) x 0.92 x 1/2
(F type insulation) Test report of line-to-line resistance at 115
°
C (
Ω) x 0.87 x 1/2
(3) Motor rated current (n036)
= Rated current at motor rated frequency (Hz) *
1
(A)
(4) Motor no-load current (n110)
*1 Base frequency (Hz) during rated output current.
*2 Rated speed (r/min) at base frequency during rated output current.
Set n106 (motor rated slip), n036 (motor rated current), n107 (motor resistance per
phase) and n110 (motor no-load current) according to the motor test report.
When connecting a reactor between the inverter and the motor, set n108 to the value of
n108 (motor leaking inductance) initial value + externally-mounted reactor inductance.
Initial setting should be used unless a reactor is installed.
Unless a reactor is connected, n108 (motor leakage inductance) does not have to be set
according to the motor.
N113 Setting Slip Compensation during Regeneration
0Disabled
1 Enabled
120 motor rated frequency (Hz)
×
*1
Number of motor pole
---------------------------------------------------------------------------------------------
Motor rated speed (r/min)
*2
–
120/Number of motor pole
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
=
No-load current (A) at motor rated frequency (Hz)
*1
Rated current (A) at motor rated frequency (Hz)
*1
----------------------------------------------------------------------------------------------------------
100%
×
=