Delta VFD-L Series

5
VFD-L Series
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5-11
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The parameter determines how the motor is stopped when the AC drive receives a
valid stop command.
1. Ramp: the AC drive decelerates the motor to Minimum Output Frequency (Pr.1-05) and
then stops according to the deceleration time set in Pr.1-10 or Pr.1-12.
2. Coast: the AC drive stops output instantly upon command, and the motor free runs until
it comes to a complete stop.
Hz
Freq.
Motor
Speed
Stops according
to deceleration
time
Time
Hz
Freq.
Motor
Speed
Free running
to stop
Time
Operation
command
ON
ON
OFF
OFF
Ramp
Coast
Note: The motor stop method is usually determined by the characteristics of the motor load
and frequency of stops.
2 - 03
P
WM Carrier Frequency Selections
F
actory Setting: d 10
Settings d 03 fc= 3KHz Unit: 1KHz
d 04 fc= 4KHz
d 05 fc= 5KHz
to
d 10 fc= 10KHz
This parameter can set the carrier frequency of PWM output.
Carrier
Frequency
Acoustic Noise
Electromagnetic
Noise, Leakage
Current
Heat
Dissipation
3KHz
10KHz
Significant
Minimal
Minimal
Significant
Minimal
Significant