# V/f Pattern; Base Frequency, Voltage (pr. 3, Pr. 19, Pr. 47) - Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual

Fr-e700 series.

## V/F pattern

4.6
V/F pattern
Purpose
Set motor ratings
Select a V/F pattern according to
applications.
4.6.1

### Base frequency, voltage (Pr. 3, Pr. 19, Pr. 47)

Used to adjust the inverter outputs (voltage, frequency) to the motor rating.
Parameter
Number
3
Base frequency
19 ∗
Base frequency voltage
Second V/F (base
47 ∗
frequency)
∗ The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 188)
Pr. 19
(2)
Set two kinds of base frequencies (Pr. 47)
When you want to change the base frequency when switching two types of motors with one inverter, use the Pr. 47 Second V/
F (base frequency).
Pr. 47 Second V/F (base frequency) is valid when the RT signal is ON. Set "3" in any of Pr. 178 to Pr. 184 (input terminal function
selection) and assign the RT signal.
REMARKS
The RT signal acts as the second function selection signal and makes the other second functions valid. (Refer to page 142)
98
Base frequency,
Base frequency voltage
Name
Initial Value
60Hz
9999
9999
Output frequency
(Hz)
Pr. 3
Pr. 47
Parameter that should be Set
Pr. 3, Pr. 19, Pr. 47
V/F
V/F
V/F
Setting Range
0 to 400Hz
0 to 1000V
8888
9999
0 to 400Hz
9999
(1)
Base frequency setting (Pr. 3)
When operating a standard motor, generally set the rated
frequency of the motor to Pr. 3 Base frequency. When running the
motor using commercial power supply-inverter switch-over
operation, set Pr. 3 to the same value as the power supply
frequency.
If the frequency given on the motor rating plate is "50Hz" only,
always set to "50Hz". Leaving the base frequency unchanged from
"60Hz" may make the voltage too low and the torque insufficient. It
may result in an inverter trip due to overload.
Special care must be taken when "1" (variable torque load) is set in
Pr. 14 Load pattern selection .
When using the Mitsubishi constant-torque motor, set Pr. 3 to
60Hz.
Refer to Page
Pr. 14
Description
Rated motor frequency. (50Hz/60Hz)
Base voltage.
95% of power supply voltage
(95% of doubled power supply voltage for
single-phase 100V power input model.)
Same as power supply voltage
(Twice the amount of power supply voltage
for single-phase 100V power input model.)
Base frequency when the RT signal is ON.
Second V/F invalid
98
100