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4-3 Voltage/Frequency (V/F) Pattern Setting
A rotary switch for Voltage/Frequency 01 /F) pattern selection is provided to adjust the
output voltage/frequency pattern for optimum operation suited to the application. This
rotary switch provides the following functions:
(1) Selection of maximum frequency: 67/80/120Hz and
(2) Selection of voltage/frequency (V/F) ratio
Fig. 4-3 shows the pOSitions of the rotary switch notches and the V/F pattern
characteristics. Maximum output frequency of 67Hz (normally 50Hz motors) can be
selected at notches
0-6,
120Hz, at notches 7 and 8, and 80Hz at notches 9-F.
(normally 60HZ motors)
Table 4-3 shows the criteria for v/F pattern selection.
'Ittlrn
nulllber
I
~
Vir pattlrn .election
'.1/1
ratio
Notch
Auto energY'savlng
,
Weak
•
Weak· mlr'lOr Boost
,
Standard
C
Stalldard . minor Boost
,
StrOr'lg
•
Strong· major Boost
•
rotary .wi teh (SWl)
,
,
,
.
'
•
@
• •
•
"
"
Output
vol ta'le
,
., "
..
,
OUtput
lrequlf~ey
'otch
'/F
rltlo
'at tern
number
,
Standud
(j)
•
Sundud
®
(floteh;
,
,
.'
."
------------------
Output voltage
,
Outt!ut frequency
otch
VIP nUo
0
Auto. energy-saving
1
Boost
,
Weak' minor
Boost
,
Standard
,
Standard' millor Boost
,
StrOllg
,
Strong· major Boost
so
."..
Outt!ut frequency
Ma.illlUIII
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12061
--
Fig. 4-3 Positions of Notches of V
IF
Pattern Selection Rotary Switch
and V /F Pattern Characteristics
4-3
pattern
nUber
-
I
Mu:iIllUIll
frequency
'7Kz
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