Pwm Carrier Frequency Selections - Delta Electronics AC Motor Drive VFD-G User Manual

Coast: The AC drive output instantly stops upon command and the motor free spins until it
comes to a complete stop.
External Fault may be enabled by the EF terminal or a Multi-Function terminal. Please refer to
Pr.04-00 to 04-03.
Frequency
Output
Frequency
Motor
speed
Operation
Command
RUN
02 - 03

PWM Carrier Frequency Selections

Settings
This parameter sets the carrier frequency of PWM output. The factory setting and setting
range depend on the model type.
When the temperature of the heat sink is greater than its limit, the AC drive will automatic
lower the carrier frequency to avoid over heating the AC drive.
The Carrier frequency of the PWM output has a signification influence on the electromagnetic
noise, heat dissipation of the AC drive, and the acoustic noise to the motor as shown in the
following chart.
Carrier
Frequency
Signification
Minimal
When the carrier frequency is low, current ripple of the AC drive is large. This may result in a
current display value greater than the actual value.
Revision July 2008, EG03, SW V1.06
Stops according
to deceleration
time
STOP
Ramp
7.5~10HP: 4000~6000Hz
15~30HP: 3000~6000Hz
40~125HP: 2000~6000Hz
150~300HP: 2000~4000Hz
Acoustic Electromagnetic
Noise
Minimal Signification
Signification
Frequency
Output
Frequency
Motor
Speed
Time
Operation
Command
RUN
Leakage
Noise Current
Signification
Minimal Minimal
Chapter 4 Parameters|
Free running
to stop
STOP
Coast
Factory Setting: 6000
Factory Setting: 6000
Factory Setting: 4000
Factory Setting: 4000
Heat
Dissipation
Signification
Minimal
Time
4-33