Delta VFD-B Series User Manual

Appendix C How to Select the Right AC Motor Drive_VFD-B Series
Revision 10/2005, BE13, SW V4.08 C-7
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
180
155
140
100
80
55
38
0
3 20
60
120
60 seconds
Base freq.: 60Hz
V/F for 220V/60Hz
180
155
100
55
38
0
320
60
120
torque (%)
Frequency (Hz)
Frequency (Hz)
60 seconds
60 seconds
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
Frequency (Hz)
Frequency (Hz)
3
20
Base freq.: 50Hz
V/F for 220V/50Hz
Base freq.: 50Hz
V/F for 220V/50Hz

Delta VFD-B Series Specifications

General

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