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Open-loop Power Convert A4
58
HUNT PREV GAIN
(Hunt Prevent Gain)
Determines the response to changes in torque
(torque slew rate gain). Increasing the gain
slows drive torque response (more dampening).
Be cautious not to set the parameter too high or
the drive will become unstable.
NOTE: it is usually best to leave this parameter
set at the default of 1.0 seconds.
Hunting can occur following a load change, but it
may also occur when the motor is settling into a
steady speed. Hunting may cause the motor to
vibrate at lower speeds. The Hunt Prevention
function will help to reduce or suppress this
oscillation.
HUNT PREV TIME
(Hunt Prevention Time Constant)
Hunt prevention filter time constant. Adjusted
for hunt prevention response and stability. By
increasing the value of the parameter, the
response time of the hunt prevention function
will become slower. Reducing the parameter to
a lower value makes the hunt prevention
function respond more quickly. Note: the
function works better with a lower time constant.
NOTE: it is usually best to leave this parameter
set at the default of 0.2 seconds.
Hunting can occur following a load change, but it
may also occur when the motor is settling into a
steady speed. Hunting may cause the motor to
vibrate at lower speeds. The Hunt Prevention
function will help to reduce or suppress this
oscillation.
PWM FREQUENCY
(PWM Frequency)
This parameter sets the PWM or ‘carrier’
frequency of the drive. The carrier is defaulted
at 10.0 kHz, which is well out of audible range.
The drive does not derate when the PWM
frequency is set to 10kHz or below.
SWITCHING DELAY
(Transistor Switching Delay)
This parameter is hardware dependent and
should not be adjusted.
VC CORRECTION
(Conduction Voltage Correction)
This parameter is hardware dependent and
should not be adjusted.
UV ALARM LEVEL
(Undervoltage Alarm Level)
This parameter sets the level (as a percentage
of the INPUT L-L VOLTS(A4)) at which an under
voltage alarm will be declared.
UV FAULT LEVEL
(Undervoltage Fault Level)
This parameter sets the level (as a percentage
of the INPUT L-L VOLTS(A4)) at which an under
voltage fault will occur.
EXTERN REACTANCE
(External Reactance)
This parameter sets the externally connected
reactance (as a percentage of base impedance)
between the drive and the motor.
INPUT L-L VOLTS
(Input Line to Line Voltage - Input Voltage)
This parameter sets the input voltage or AC line
input voltage to the drive. This parameter is
used only to determine the UV alarm and fault
levels.
Содержание HPV 600
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