Delta VFD-VL Series User Manual

Appendix C How to Select the Right AC Motor Drive|VFD-VL
C-7
motor drive operates more than one motor, please pay attention to starting and changing
the motor.
Power Transmission Mechanism
Pay attention to reduced lubrication when operating gear reduction motors, gearboxes,
belts and chains, etc. over longer periods at low speeds. At high speeds of 50/60Hz and
above, lifetime reducing noises and vibrations may occur.
Motor torque
The torque characteristics of a motor operated by an AC motor drive and commercial
mains power are different.
Below you’ll find the torque-speed characteristics of a standard motor (4-pole, 15kW):
AC motor drive Motor
18
0
155
140
100
80
55
38
0
3
20
60
120
60 seconds
continuous
Base freq.: 60Hz
V/f for 220V/60Hz
18
0
155
100
55
38
0
3
20
60
120
torque (%)
Frequency (Hz)
Frequency (Hz)
60 seconds
60 seconds
continuous
torque (%)
Base freq.: 60Hz
V/f for 220V/60Hz
130
140
100
85
45
35
0
3
20
50
120
180
150
100
45
35
0
50
120
68
80
torque (%)
torque (%)
60 seconds
60 seconds
continuouscontinuous
Frequency (Hz)
Frequency (Hz)
3
20
Base freq.: 50Hz
V/f for 220V/50H
z
Base freq.: 50Hz
V/f for 220V/50H
z
Call 1(800)985-6929 for Sales
deltaacdrives.com
sales@deltaacdrives.com
Call 1(800)985-6929 for Sales
deltaacdrives.com
sales@deltaacdrives.com

Delta VFD-VL Series Specifications

General

Brand	Delta
Model	VFD-VL Series
Category	DC Drives
Language	English