Rhymebus RM6F5 series, Operation Manual

Page: 102 / 195

Chapter 5 Parameter Setting Description
102
5
5-17 Others Function
F_081 Switching Frequency
When the value of F_081 is set to ―0‖, the switching frequency of PWM voltage will be
800Hz and others switching frequency = F_081
× 2.5kHz.
The higher switching frequency has less noise. But using higher switching frequency must
consider the cable length between drive and motor and must be adjusted according the
connection distance between drive and motor. (Refer to the 2-3-6)
※
Upper limit of switching frequency
RM6E(9916): 1/2HP~75HP

15kHz
Above 100HP

10kHz
※ Switching frequency will be modulated with load automatically.
1min
Load current
80%
90%
100%
Switching
frequency
15K
12.5K
10K
7.5K
Time
5%
1min 1min 1min 1min 1min
Switching
frequency
Load current
F_082 Stop Mode
0: Ramp to stop
1: Coast to stop
2: Coast to stop + DC braking
When
the value of F_082 is set to ―2‖, the operation characteristic is shown as below figure:
DC voltage
Time
Output
voltage
N
Fout / F_031
ratio
0.1 1
F_075 (DC
Braking Level)
Delay Time before
Speed Tracing (F_089)
10
1
F_076 (Time
of DC Braking
after Stop) * N
Stop
AC voltage
*F_031 (
Maximum Output Frequency)
When the output current of drive is abnormal at DC braking, appropriately increase the
setting value of F_089 (Delay Time before Speed Tracing).