Delta Electronics VFD-EL series User Manual

Chapter 4 Parameters|
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4-38 Revision 2016/03, 6ELE, V1.14
 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.
 The PWM carrier frequency will be decreased automatically by the ambient temperature and output current of
the AC motor drives. It is used to prevent AC motor drive overheat and extend IGBT’s life. Therefore, it is
necessary to have this kind of protection method. Take an example of 460V models, assume that the carrier
frequency is 12kHz, ambient temperature is 50 degrees C with single AC motor drive. If the output current
exceeds 80% * rated current, the AC motor drive will decrease the carrier frequency automatically by the
following chart. If output current is around 100% * rated current, the carrier frequency will decrease from 12k
Hz to 8k Hz.
Mounting method
Method A
Frame B
Frame A
150mm
150mm
5
0
m
m
5
0
m
m
Frame B
Frame A
Method B
40%
50%
60%
For 460V Series
80%
90%
100%
70%
Carrier
Frequency
R
a
t
e
d
C
u
r
r
e
n
t
(
%
)
2kHz
4kHz 8kHz
10kHz
12kHz
6kHz
50 with mounting method A
℃
40 with mounting method B
℃
25 with mounting method B
℃
40%
50%
60%
For 115V/230V Series
80%
90%
100%
2kHz
4kHz 8kHz
10kHz
12kHz
6kHz
70%
R
a
t
e
d
C
u
r
r
e
n
t
(
%
)
Carrier
Frequency
50 with mounting method A ℃
40 with mounting method B ℃
35 with mounting method A ℃
25 with mounting method B
℃
02.04
Motor Direction Control
Factory Setting: 0
Settings 0 Forward/Reverse operation enabled
1 Reverse operation disabled
2 Forward operation disabled
 This parameter is used to disable one direction of rotation of the AC motor drive direction of rotation.
02.05
The source of Power-On command and Running command modifies the operating control of the VFD
Factory Setting: 1
Settings 0 Start running when Power is on.
1 Don’t run when Power is on

Delta Electronics VFD-EL series Specifications

General

Brand	Delta Electronics
Model	VFD-EL series
Category	Media Converter
Language	English