4-117
These parameters are automatically set during auto-tune. No adjustment required. Parameters are set to 50% for
02-10, 75% for 02-11 and 137.5% for 02-12 to reduce the impact of core saturation. The m
otor core’s saturation
coefficient is defined as a percentage of the motor excitation current. When the motor flux reaches 137.5% level,
the core’s saturation coefficient shall be greater than 137.5%. When the motor flux is 50% or 75%, the core’s
saturation coefficient is required to be less than 50% and 75%.
(10) Motor core loss (02-13)
Set motor core loss as the percentage of the motor rated power.
3 × Motor core loss (watt)
Motor rated power (watts, 02-05)
Note:
In V/F mode motor core loss (o2-13) is used to for torque compensation.
(11) Motor line to line resistance (02-15)
(12) Motor no-load current (02-00).
Value is calculated based on the motor rated frequency (17-05) and motor rated current (17-03).
In V / F control mode, the output current is greater than the no-load current with slip compensation is enabled.
Note:
The value of 02-01 needs to be greater than the value set in parameter 02-00, otherwise warning message
"SE01" out of range error will be displayed.
Figure 4.4.15 Y-equivalent model an induction motor
02-20
No-Load Current of motor 2
Range
0.01~600.00 A
02-21
Rated current of motor 2
Range
10%~20
0% of inverter’s rated current
% W
core
( 02-13)
=
×
100%
Im: 02-09 Excitation Current
Ks1: 02-10 Motor Core Saturation Coefficients 1
Ks2: 02-11 Motor Core Saturation Coefficients 2
Ks3: 02-12 Motor Core Saturation Coefficients 3
