4-182
. When the inverter input power supply voltage (or frequency) is higher than the motor
rated voltage (or frequency), set the motor rated voltage (17-03) and the motor
rated frequency (17-04) to the rated frequency on the motor nameplate.
Example 2: The inverter input voltage and frequency (440V/50Hz) are higher than the
motor rated voltage and frequency (380V/33Hz), set 17-03 = 380V (rated
motor voltage) and 17-04 = 33Hz (motor rated frequency).
Pole number of motor (17-06)
Set the motor pole number with its range is 2, 4, 6 and 8 poles
Number of PG pulse (17-07)
Set the pulse number of each cycle. If the control mode is SV mode and the V / F +
PG mode, the encoder must be installed on the motor shaft and there is no
reduction gear ratio.
Motor no-load voltage (17-08)
. Motor no-load voltage is mainly for SV or SLV mode, whose set value is lower than
the input voltage of 10~50V can ensure the torqe performance at the rated
frequency.
. Set to about 85 ~ 95% of the motor rated voltage. In general, the set motor no-load
voltage can be closer to the motor rated voltage for the greater motor, but can not
exceed the rated voltage.
. The motor no-load voltage can be set to the value greater than the actual input
voltage. For this case, the motor can only operates under relatively low frequency.
If the motor operates under the rated frequency, the failure of over voltage may
easily occur.
. The higher the motor power is, the greater the no-load voltage is.
. The smaller no-load voltage will reduce the no-load current. When the load is
added, the magnetic flux is weakened and the current is increased.
. The higher no-load voltage is, the greater no-load current is. When the load is
added, the magnetic flux is weakened and the current is increased. Inreasing
magnetic flux easily generates back EMF and the torque control easily fails.
Motor excitation current (17-09)
. Motor excitation current is mainly for the cases that the rotary automatic tuning can
not be executed.
. Motor excitation current is set to 30% of the motor rated current.
. If this parameter is not set, the inverter will use its own internal parameters to
calculate related parameters.
. Only the static-type automatic tuning (17-00 = 1) can be set.
Automatic tuning start (17-10)
. Select 1 for17-10 and press ENTER, You can enter the screen of motor
automatic tuning and the operator will appear a message of "Atrdy". Press RUN to
start the motor automatic tuning and the operator will appear a message of “Atune
". When the motor is successfully tuned, the message of "AtEnd" will appear.
Error history of automatic tuning (17-11)
If the motor automatic tuning process fails, it will display a message of "AtErr". The
error message will be displayed in17-11.
For automatic tuning error causes and troubleshooting, you can refer to section 5.
Note: The motor tuning error history (17-11) records the tuning result of last time.
If the tuning is given up or successful, then no error is displayed.
Long wire between the motor and the inverter
. When the wiring between the motor and the inverter is longer than 50m, please be
sure to perform static-type automatic tuning on the long wire (17-00 = 2). If you
want to obtain the vector control with high efficiency, pleaser firstly perform the
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