Chapter 3 How to Select the Right AC Motor Drive
|
C200 Series
3-6
different and depending on brand. The lubricating function for operating long time at low speed
and for high-speed operation needs to be considered carefully.
5.
Synchronous motor:
The rated current and starting current are higher than for standard motors. Please check before
operation and choose the capacity of the AC motor drive carefully. When the AC 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
180
155
140
100
80
55
38
0320 60
120
60 seconds
Base freq.: 60Hz
V/F for 220V/60Hz
180
155
100
55
38
0320 60
120
tor
que
(%)
Frequency (Hz)
Frequency (Hz)
60 seconds
60 seconds
to
rq
ue
(
%
)
Base freq.: 60Hz
V/F for 220V/60Hz
130
140
100
85
45
35
0320 50
120
180
150
100
45
35
0
50
120
68
80
to
rque
(%)
tor
que
(
%
)
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
Call 1(800)985-6929 for Sales
deltaacdrives.com
Call 1(800)985-6929 for Sales
deltaacdrives.com
