Mitsubishi Electric FR-D700 Series, Инструкция по эксплуатации

Страница: 85 / 290

81
Set V/F pattern
4
P
A
RAMETE
R
S
(3) Base frequency voltage setting (Pr. 19)
Use Pr. 19 Base frequency voltage to set the base voltage (e.g. rated motor voltage).
If the setting is less than the power supply voltage, the maximum output voltage of the inverter is as set in
Pr. 19
.
Pr. 19 can be utilized in the following cases.
(a) When regeneration is high (e.g. continuous regeneration)
During regeneration, the output voltage becomes higher than the reference and may cause an overcurrent trip
(E.OC ) due to an increased motor current.
(b) When power supply voltage variation is large
When the power supply voltage exceeds the rated voltage of the motor, speed variation or motor overheat may be
caused by excessive torque or increased motor current.
NOTE
When general-purpose magnetic flux vector control is selected,
Pr. 3, Pr. 47
and
Pr. 19
are invalid and
Pr. 83
and
Pr. 84
are valid.
Note that
Pr. 3
or
Pr. 47
value is made valid as inflection points of S-pattern when
Pr. 29 Acceleration/deceleration pattern
selection
= "1" (S-pattern acceleration/deceleration A).
Changing the terminal assignment using
Pr. 178 to Pr. 182 (input terminal function selection)
may affect the other
functions. Make setting after confirming the function of each terminal.
Parameters referred to
Pr. 14 Load pattern selection Refer to page 82
Pr. 29 Acceleration/deceleration pattern selection Refer to page 94
Pr. 83 Motor rated voltage, Pr. 84 Rated motor frequency Refer to page 100
Pr. 178 to Pr. 182 (input terminal function selection) Refer to page 108
General-purpose magnetic flux vector control Refer to page 70