YASKAWA E7U Programming Manual page 37

C6-03 Carrier Frequency Upper Limit
C6-04 Carrier Frequency Lower Limit
Setting Range: 0.4 to 15.0 kHz
Factory Default: Model Dependent
C6-05 Carrier Frequency Proportional Gain
Setting Range: 0 to 99
Factory Default: 0
It is possible to configure the Drive such that the carrier frequency will automatically increase as the output frequency is raised
(synchronous carrier). A synchronous carrier can be used by setting parameter C6-02=F: Program. The profile of the carrier
frequency is show below and can be configured to the users specification by setting the carrier frequency upper and lower
limits (C6-03 and C6-04 respectively) and a carrier frequency proportional gain (C6-05).
The frequencies that correspond to the breakpoints a and b will be determined by the value of
the following formulas:
10.0kHz > C6-03 > 5.0kHz
IMPORTANT
C6-03
f
c
C6-04
C6-04
Fig. 24 Synchronous Carrier Frequency Characteristics
Conditions
C6-03 > 10.0kHz
C6-03 < 5.0kHz
If C6-05 > 6 and C6-04 > C6-03 the Drive will fault and display and OPE11 error.
C6-05 x K
a
b
a
b
K Value
3
2
1
Programming 31
f
out
K
given in the table below and
C6 - 04
=
a
Κ
×
C6 - 05
C6 - 03
=
b
Κ
×
C6 - 05