22.
PARAMETERS
Pr.3
It is possible to set
the
base frequency (reference
lrequency corresponding
to
the motor rated
torque) meeting the motor rating, in the range of
setting
ranged
0
to
4ootlZ.
By setting proper the value for Pr.19 (base fre-
mj.
quency voltage), the PWM output is modified
so
that the waveform lwks
to
the motor like the volt-
age value set in parameter 19. This will result in
optimum motor performance.
Be90
1W-W
,,
BEaSe
-r
frww
voltage
Note:
If the general purpose magnetic flux vector
con-
trol mode has been selected with Pr.80, setting
of Pr.3
becomes
60HZ.
If
Pr.19 has been set at '9999", Pr.19
=
220V
(44OV
for the
400V
type) will become valid.
When using the motor designed for use with an
inverter (constant torque motor), set
60Hz
for the
base frequency.
*:
If
'9998" (factory-setting) is
set for Pr.19, the maximum out-
put voltage is the same as the
power supply vdtage.
-63-
"
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