4-97
(4) Motor rated voltage (02-04)
Set the motor rated voltage according to the motor nameplate.
(5) Rated frequency of motor (02-06)
Set the motor rated frequency according to the motor nameplate.
(6) Rated rotation speed of motor (02-03)
Set the motor rpm according to the motor nameplate.
(7) No-load motor voltage (02-19)
Parameter determines the rated flux during motor’s rated rotation in SLV control mode. Set the value of
this parameter to the same value as parameter 17-08 (02-19 for motor 2). A value of 10~50V below the
input voltage level ensures that the motor is capable of providing adequate torque performance when
operating at nominal speed (or higher speed). Setting the value to small can result in a reduction in
no-load current, weakened motor flux and an increase in motor current while the motor is loaded.
(8) Motor excitation current (02-09)
This parameter is automatically set via auto-tuning. It required manual adjustment without
auto-tuning.
Start tunig from 33% when doing manual adjustment. If the output value of no-load voltage (12-67)
is higher than the setting value of no-load voltage (17-08), the motor excitation current is adjusted
downward; if the value (12-67) is lower than the value (17-08), the motor excitation current is
adjusted upward.
Adjust the value of motor excitation current (02-09) will change the value of the motor leakage
inductance (02-17) and motor mutual inductance (02-18).
(9) Setting of motor core saturation coefficients 1, 2 and 3 (02-10, 02-11, 02-12)
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
motor 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 (02-13) is used to for torque compensation.
(11) Motor line to line resistance (02-15)
% W
core
(02-13) =
× 100%
Im: 02-09 Motor 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
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