Pwm Carrier Frequency Selection; Automatic Voltage Regulation (Avr) - Delta VFD-M-D series User Manual

Chapter 5 Parameters|VFD-M-D Series
Uses edge trigger for speed switch. It
has 5-step speed for the single
04 Multi-step
direction to simplify the detection of the
control mode 3
position sensor.
Uses level trigger for speed switch. It
05 Multi-step has 5-step speed for the single
control mode 4 direction to simplify the detection of the
position sensor.
0 - 10

PWM Carrier Frequency Selection

Settings
230V Series
This parameter determines the PWM carrier frequency of the AC motor drive.
Carrier
Frequency
1kHz
8kHz
15kHz
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.
0 - 11

Automatic Voltage Regulation (AVR)

Settings
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
5-24
Advantage
01 to 15kHz
Power
0.5HP (0.4kW)
Electromagnetic
Acoustic
Noise or leakage
Noise
Significant Minimal
Minimal
Significant
00 AVR function enabled
01 AVR function disabled
02 AVR function disabled for deceleration
There is only 5-step speed for the
single direction. It needs to run to the
close complete position after power on
again or AC motor drive stops due to
the edge trigger.
There is only 5-step speed for the
single direction.
Setting Range
01~15kHz
Heat
Dissipation
current
Minimal
Significant
Disadvantage
Factory Setting: 12
Factory Setting
12kHz
Current
Wave
Minimal
Significant
Factory Setting: 00
Revision Jan. 2007, MDE2, SW V1.05
Unit: 1