47
(1) Input Voltage Setting (Cn-01)
•
Set inverter voltage to match power supply voltage at input side (e.g.
：
200V/220V,
380V/415V/440V/460V)
(2) V/F Curve Parameter Settings (Cn-02
∼
Cn-08)
•
The V/F curve can be set to either one of the preset curves (setting Sn-02=0
∼
14)
or a customer user-set curve (setting Sn-02=15).
•
Setting Cn-02
∼
Cn-08 can be set by the user when Sn-02 has been set to “15”. The
user-defined V/F curve can be specified through the settings of Cn-02
∼
Cn-08 as
shown in Fig. 18. The factory setting is straight line for the V/F curve. (Cn-05=Cn-
07, Cn-06 is not used) as shown below (220V/60Hz case).
Freq.
Cn-03
Cn-02
Cn-06
Cn-05
Cn-08
Cn-07
Cn-04
0
Voltage
Freq.
13
1.5 Hz
0
220V
60 Hz
(Cn-07=Cn-05) (Cn-04=Cn-02)
Cn-03
(Cn-08=Cn-06)
(Factory Setting)
Voltage
Fig. 18 User-defined V/F curve
•
In low speed operation (<3Hz), a larger torque can be generated by increasing the
slope of V/F curve. However, the motor will be hot due to over-excitation. At the
same time the inverter will be more inclined to fault. Based upon the applied load,
properly adjust the V/F curve according to the magnitude of monitored current into
the motor.
•
The four frequency settings must satisfy the following relationship, otherwise an
error message “V/F Curve Invalid” will display.
(a)
Max. output freq.≧ Max. voltage freq. ＞ Mid. Output freq. ≧ Min. output freq.
(Cn-02) (Cn-04) (Cn-05) (Cn-07)
(b)
Max. output volt.≧ Mid. output volt. ＞ Min. output voltage
(Cn-03) (Cn-06) (Cn-08)
•
If Mid. Output frequency (Cn-05) = Min. output frequency (Cn-07), the setting
(Cn-06) is not effective.
(3) Motor Rated Current (Cn-09)
•
Electronic overload thermal reference current
•
The factory setting depends upon the capacity type of inverter (Sn-01).
•
The setting range is 10%
∼
200% of the inverter rated output current.
•
Set the rated current shown on the motor nameplate if not using the TECO 4-pole motor.
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