HNC Electric HV480 Series, Руководство пользователя

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1. The curve of multi-point V/F shall be set according to the load characteristics of the motor. When setting, it is
necessary to confirm that the following conditions are established: v1 < v2 < v3, f1 < F2 < F3.
2. Figure 5 - 05 is a schematic diagram of setting multi-point VF curve.
Too high voltage setting at low frequencies may cause the motor to overheat or even burn down, and the
frequency inverter may be over-run or over-current protected.
Figure 5 - 05 multi-point V/F curve setting diagram
F3 - 09 VF slip compensation gain
0%
～
200.0% [0.0%]
VF slip compensation can compensate the motor speed deviation of asynchronous motor when the load
increases, so that the motor speed can basically remain stable when the load changes.
VF slip compensation gain is set to 100.0 %, which indicates that the compensated slip is the rated slip of the motor
when the motor is under rated load.
When adjusting VF slip compensation gain, it is generally based on the principle that the motor speed is
basically the same as the target speed under the rated load. When the motor speed is different from the target value,
it is necessary to adjust the gain appropriately.
F3 - 10 VF over-excitation gain 0
～
200 [64]
In the process of frequency inverter deceleration, over-excitation control can suppress the rise of bus voltage
and avoid over-voltage fault. The greater the over-excitation gain, the stronger the suppression effect.
When the frequency inverter is prone to over-voltage alarm during deceleration, it is necessary to increase the
over-excitation gain. However, the over-excitation gain is too large, which easily leads to an increase in the output
current and needs to be weighed in the application.
When the inertia is very small, no voltage rise will occur during motor deceleration, it is recommended to set the
over-excitation gain to 0. It is also recommended to set the over-excitation gain to 0 when there is a braking
resistance.
F3 - 11 VF oscillation suppression gain 0 ~ 100 [model determination]
The gain is chosen to be as small as possible on the premise of validly suppressing oscillation so as not to
adversely affect VF operation. Please select the gain of 0 when the motor does not oscillate. Only when the motor is
obviously oscillating can the gain be appropriately increased. The greater the gain, the more obvious the suppression
of oscillation is.
When using the function of suppressing oscillation, it is required that the rated current and no-load current
parameters of the motor are accurate, otherwise VF oscillation suppression effect is not good.
F3 - 13 VF separated voltage source 0
～
8 [0]
F3 - 14 VF separated voltage digital setting 0
～
Rated voltage of motor [0]
Output voltage (V)
Frequency (Hz)