Delta Electronics VFD-DD Series, User Manual

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Chapter 4 Parameter Settings
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DD Series
4-29
This parameter determines the PWM carrier frequency of the AC motor drive.
1kHz
8kHz
15kHz
Carrier
Frequency
Acoustic
Noise
Electromagnetic
Noise or leakage
current
Heat
Dissipation
Current
Wave
Significant
Minimal
Significant
Minimal
Minimal
Significant
Minimal
Significant
From the table, we see that the PWM carrier frequency has a significant influence on the
electromagnetic noise, AC motor drive heat dissipation, and motor acoustic noise. If noises from
ambient environment is greater than motor noise, lower PWM carrier frequency will help to lower the
temperature of AC motor drive. When PWM carrier frequency is high, though the drive will operate more
quietly, but wiring and interference may have problem.
Model VFDXXXDDXXE:
Settings
02~10kHz
Auto Voltage Regulation (AVR) Function
Control mode
VF VFPG SVC FOCPG FOCPM
Factory setting: 0
Settings 0: Enable AVR
1: Disable AVR
2: Disable AVR when deceleration stop
The rated voltage of the motor is usually AC220V/200V 60Hz/50Hz and the input voltage of the AC motor
drive may vary between 180V to 264 VAC 50Hz/60Hz. Therefore, when the AC motor drive is used
without AVR function, the output voltage will be the same as the input voltage. When the motor runs at
voltages exceeding the rated voltage with 12% - 20%, its lifetime will be shorter and it can be damaged
due to higher temperature, failing insulation and unstable torque output.
AVR function automatically regulates the AC motor drive output voltage to the Maximum Output Voltage
(Pr.1-02). For instance, if Pr.1-02 is set at 200 VAC and the input voltage is at 200V to 264VAC, then the
Maximum Output Voltage will automatically be reduced to a maximum of 200 VAC.
When motor stops with deceleration, it will shorten deceleration time. When setting this parameter to 02
with auto acceleration/deceleration, it will offer a quicker deceleration.
Source of the Master Frequency Command
Control mode
VF VFPG SVC FOCPG FOCPM
Factory setting: 1
Settings 0: by digital keypad input
1: by external terminal
2: by RS-485 serial communication
This parameter is used to set the source of the operation command.
Demo Mode
Control mode
VF VFPG SVC FOCPG FOCPM
Factory setting: 0
Settings 0: Disable
1: Display demo action
Frequency Testing Command
Control mode
VF VFPG SVC FOCPG FOCPM
Factory setting: 0
Settings 0~120.00Hz