Service manual

www.enc.net.cn/en Tel/Fax:[phone] Detailed function description
66
F2.04 Slip freq. compensation Range: 0~150% 0
This function can adjust
output frequency properly
as the load varies to
compensate slip frequency
of the asynchronous motor
dynamically, so that control
motor speed in constant value.
If act with automatic torque
boost function, can get better
low speed moment characteristic.
As shown in Fig.6-10.
F2.05 Carrier wave freq. Range: 0.5－15.0K
Depend on
device t
yp
e
Carrier frequency mainly affects motor noise and heat consumption during
running. Relation between carrier frequency and motor noise, current leakage,
disturbance is as follows:
Carrier frequency increase(↑)，motor noise decrease(↓)，motor current
leakage increase(↑)，disturbance to environment increase(↑)；
Carrier frequency decrease (↓)，motor noise increase (↑)，motor current
leakage decrease (↓)，disturbance to environment decrease (↓)。
Should decrease carrier frequency properly to reduce heat consumption of the
inverter when ambient temperature is high and motor load is heavy. Relation of
EDS1000 each type and carrier frequency is as shown in Table 6-1.
Table 6-1 Relation table of device type and carrier frequency
Type Set range Factory default
11KW and below Range：0.5－12.0KHz 6.0KHz
15～45KW Range：0.5－8.0KHz 4.0KHz
55KW Range：0.5－5.0KHz 3.0KHz
F2.06 Jog run frequency Range: 0.10－50.00Hz 5.00Hz
F2.07 Jog Acce time Range: 0.1－60.0S 20.0S
Out
p
ut current
100% Slip compensation
After slip
compensation
Motor s
p
ee
d
Before slip compensation
150%
100%
50%
Fig.6-10 slip freq. compensation graph
note
(1) To get better control characteristic，suggest that the ratio of carrier frequency to
inverter max. run frequency be not smaller than 36.
(
2
)
Error exists in current dis
p
la
y
ed value when carrier fre
q
uenc
y
is small.