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Open-loop Drive A1
48
DC START TIME
(DC Injection Current Start Time)
The time DC injection current is applied
following valid run command until release of the
speed command. After receiving a valid run
command the drive will maintain DC Start Level
current for DC Start Time seconds before
releasing the internal speed reference allowing
the drive to ramp up in speed. At the start, it is
important to have DC injection current before the
mechanical brake is picked and to have DC
injection current after the mechanical brake is
picked to allow the brake to fully open.
DC STOP TIME
(DC Injection Current Stop Time)
The level of DC injection current at stop as a
percent of drive’s rated current. If ramp to stop is
selected, the drive will ramp down in speed
following removal of the run command to the DC
Stop Freq and will then output DC Stop Level
current for DC Stop Time seconds. At the stop,
it is important to have DC injection current
before the mechanical brake is closed and to
have DC injection current after the mechanical
brake is closed to allow the brake to fully close.
OVERSPEED MULT
(Over Speed Multiplier)
This parameter sets the percentage of contract
speed for the OVERSPEED TEST (U4).
STALL TEST LEVEL
(Stall Test Level)
This parameter sets the percentage of motor
current the drive uses (in conjunction with
STALL FAULT TIME(A1)) to determine when an
STALL FAULT occurs. In order for a STALL
TEST FAULT to occur, it must be enabled by the
STALL TEST ENA (C1) parameter.
STALL FAULT TIME
(Stall Fault Time)
This parameter sets the time that the drive can
be at or above the STALL TEST LVL(A1), before
the drive declares an STALL TEST FAULT. In
order for a STALL TEST FAULT to occur, it must
be enabled by the STALL TEST ENA (C1)
parameter.
SLIP COMP TIME
(Slip Compensation Time Constant)
Slip compensation filter time constant. Adjusted
for slip compensation response and stability. By
increasing the value of the parameter, the
response time of the slip compensation function
will become slower. Reducing the parameter to
a lower value makes the slip compensation
function respond more quickly. Note: Adjusting
the parameter too low may result in unstable
motor operation or adjusting the parameter too
high will result in very poor response.
NOTE: it is usually best to leave this parameter
set at default of 1.5 seconds.
Slip compensation allows an open-loop drive to
maintain constant motor speed regardless of
loading. The function adjusts the drive’s output
frequency (and output voltage) to compensate
for motor slip as the motor load is increased.
The compensation is based on the motor rated
speed, frequency and calculated motor torque,
therefore a valid value must be entered for the
Rated Motor Speed (RATED MTR SPEED(A5))
SLIP COMP GAIN
(Slip Compensation Gain)
Multiplier of motor rated slip at rated torque.
Setting the parameter to 1.00 compensates the
drive output frequency by rated slip at rated
torque. Setting the Slip Compensation Gain to
0.00 disables the slip compensation function.
NOTE: it is usually best to leave this parameter
set at the default of 1.0.
Slip compensation allows an open-loop drive to
maintain constant motor speed regardless of
loading. The function adjusts the drive’s output
frequency (and output voltage) to compensate
for motor slip as the motor load is increased.
The compensation is based on the motor rated
speed, frequency and calculated motor torque,
therefore a valid value must be entered for the
Rated Motor Speed (RATED MTR SPEED(A5))
Содержание HPV 600
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