58
OUTPUT FREQUENCY (Hz)
OUTPUT VOLTAGE (%)
FX BOOST
CONSTANT V/Hz
10
20 30
40 50
60
10
20
30
40
50
60
70
80
90
100
AC BOOST
AC BOOST only functions during acceleration. In the diagram above, the drive is
operating at 35 Hz and is then commanded to 50 Hz. The output voltage is
increased by the AC BOOST setting (approximately 15% in the example above)
during acceleration to the new speed setpoint. Once the new setpoint is reached,
the output voltage returns to normal.
21 SLIP CMP (SLIP COMPENSATION)
SLIP COMPENSATION is used to compensate for changes in motor speed
(“slip”) which occur due to changes in load. In a standard AC induction motor, as
the load on the motor increases, the motor current increases and the motor shaft
speed decreases. By increasing the output frequency in response to the increased
motor current, SLIP COMPENSATION is able to counteract the reduction in
motor speed due to increased load. This parameter is useful in applications where
precise speed regulation is needed, even under changing load conditions. The use
of SLIP COMPENSATION can result in speed regulation of less than 1% of base
speed in most applications. SLIP COMPENSATION is often set to 3%, which is
the standard slip rating of most AC induction motors.
22 TORQUE (TORQUE CURVE SELECTION)
This parameter is used to select whether the output of the drive follows a constant
or variable V/Hz curve. The following selections are available:
CONSTANT Use for constant torque applications to optimize torque.
VARIABLE Use for variable torque applications to optimize energy
savings.
To Next Page
Loading...
