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Operation
Note: Since the motor uses rotor slip to produce motor torque,
the motor speed will not necessarily increase/decrease
linearly with a linear increase/decrease in applied motor
frequency. Some trial and error may be necessary to find
the optimum Accel and Decel settings for your application.
If the control trips (faults) during rapid accel or decel,
selecting longer ramp times will help eliminate the trips.
52-Torque Boost - The Torque Boost parameter can be
adjusted to provide more or less starting torque from the motor
than is available with the factory setting. The boost adjustment
alters the output voltage of the inverter from the normal value (as
defined by the V/HZ Profile) by increasing or decreasing the
starting output voltage by fixed values.
The boost is set from the factory at a level that is suitable for
most applications. If adjustment is required, adjust the boost up
in small increments until the motor shaft just starts to rotate with
maximum load applied. Caution should be exercised when
adjusting the Torque Boost parameter to prevent motor
overheating at low operating speeds. The Torque Boost is
adjustable from 0% to 25% of the nominal input voltage.
65-Slip Comp Adj - The Slip Compensation Adjustment is
available to compensate for varying load conditions during
normal operation. This parameter will set the maximum amount
of allowable variation in output frequency under varying load
conditions which the control will see as changes in output
current. As the control sees the motor current increase towards
100% of parameter 03-Rated Current (Inverter Rated Current),
the inverter will automatically increase the output frequency to
compensate for slip. The range of adjustment is from 0-12%.
The factory setting is 0%.