Goodrive350 series high-performance multifunction VFD
Basic operation guidelines
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Output voltage V
Output frequency f
cut-off
boost
2.
Energy-saving run
During actual running, the VFD can search for the max. efficiency point to keep running in the most
efficient state to save energy.
Note:
This function is generally used in light load or no-load cases.
This function does for fit in cases where load transient is required.
3.
V/F slip compensation gain
SVPWM control belongs to open-loop mode, which will cause motor speed to fluctuate when motor
load transients. In cases where strict speed requirement is needed, you can set the slip
compensation gain to compensate for the speed variation caused by load fluctuation through VFD
internal output adjustment.
The setting range of slip compensation gain is 0
–200%, in which 100% corresponds to the
rated slip frequency.
Note:
Rated slip frequency = (Rated synchronous rotation speed of motor
– Rated rotation speed of
motor) x (Number of motor pole pairs)/60
4.
Oscillation control
Motor oscillation often occurs in space voltage vector control in large-power driving applications. To
solve this problem, the VFD provides two oscillation factor function codes. You can set the function
codes based on the oscillation occurrence frequency.
Note:
A greater value indicates better control effect. However, if the value is too large, the VFD output
current may be too large.
5.
Asynchronous motor IF control
Generally, the IF control mode is valid for asynchronous motors. It can be used for a synchronous
motor only when the frequency of the synchronous motor is extremely low. Therefore, the IF control
described in this manual is only involved with asynchronous motors. IF control is implemented by
performing closed-loop control on the total output current of the VFD. The output voltage adapts to
the current reference, and open-loop control is separately performed over the frequency of the
voltage and current.
