YASKAWA Varispeed f7, Programming Manual

Page: 45 / 202

Programming 37
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).
If parameter C6-01 = “0: Heavy Duty”, parameters C6-03 cannot be changed and parameters C6-04 and C6-05 are not displayed.
Fig. 30 Synchronous Carrier Frequency Characteristics
The frequencies that correspond to the breakpoints a and b will be determined by the value of
K
given in the table below and
the following formulas:
d1 Preset References
d1-01 Frequency Reference 1
d1-02 Frequency Reference 2
d1-03 Frequency Reference 3
d1-04 Frequency Reference 4
d1-05 Frequency Reference 5
d1-06 Frequency Reference 6
d1-07 Frequency Reference 7
d1-08 Frequency Reference 8
d1-09 Frequency Reference 9
d1-10 Frequency Reference 10
d1-11 Frequency Reference 11
Conditions
K
Value
C6-03 > 10.0kHz 8
10.0kHz ≥ C6-03 > 5.0kHz
4
C6-03
≤
5.0kHz
2
IMPORTANT
If C6-05 > 6 and C6-04 > C6-03 the Drive will fault and display an OPE11 error.
C6-03
C6-04
C6-05 x K
f
out
f
c
a
b
a
b
x
f
out
Κ
05 - C6
04 - C6
a
×
=
Κ
05 - C6
03 - C6
b
×
=