0
9
Parameter Description
Parameter Description
•
When P.71=0, the brake is idling. The output of the inverter will be terminated immediately after
pressing
STOP
RESET
, and the motor will be racing.
•
When P.71=1, it is now beeline brake. The output of the inverter will follow the
acceleration/deceleration curve after pressing
STOP
RESET
.
5.30 Carrier Frequency (P.72)
P.72 “Carrier frequency”
Parameter
Factory Setting
Setting Range
Remarks
-
-
-
5
1
~
1
5
2
7
<Setting>
•
The higher the carrier frequency is, the lower the motor acoustic noise is. Unfortunately, larger
leakage current and larger noises generated by the inverter are resulted in.
•
The higher the carrier frequency is, the more energy is dissipated, and the higher the temperature of
the inverter is.
•
In case a mechanical resonance occurs in a system with the inverter, P.72 is helpful for improving
the performance by adjusting the values.
•
The higher Carrier frequency, the inverter rated current will decline, which was to prevent the
inverter to overheat and extend the life of IGBT, so that protection measures are necessary.The
carrier frequency In 8kHz and below, rated current of a inverter for 100%, as the carrier frequency
increase, rating current as the decline will accelerate product heat to protect the inverter. Rated
current and carrier frequency relation curve shown in the following figure:
ON
OFF
Operation
signal
Time
O
ut
pu
t f
re
qu
en
cy
(H
z)
Motor coasts stop
Time
O
ut
pu
t f
re
qu
en
cy
(H
z)
ON
OFF
Operation
signal
Deceleration time
(Time set in P.8, etc.)
DC break
