Application and Overload Selections
6-
3
n
Difference
between
CT
and
VT
The
characteristics of CT (low carrier, constant torque) and VT (high carrier, variable torque) are shown
below.
n
Setting
Precautions
C6-01
(CT/VT
Selection)
When
setting C6-01, observe the following precautions.
•
Depending
on the set value in C6-01, the setting range of the related parameters is limited as follows:
* Factory
settings depend on Inverter capacity.
200
V and 400 V Class Inverters for 0.4 to 22 kW: 6 (15 kHz)
200
V Class Inverters for 30 to 90 kW, or 400 V Class Inverters for 30 to 185 kW: 4 (10 kHz)
200
V Class Inverter for 110 kW, or 400 V Class Inverters for 220 to 300 kW: 1 (2 kHz)
•
When
the setting in E1-04 or E3-02 is greater than 150 Hz, if C6-01 is set to 0, an OPE02 (Parameter set-
ting
range error) will occur.
CT:
Low
Carrier,
Constant
Torque
VT:
High
Carrier,
Variable
Torque
Constant
torque means a fixed load torque for all motor
speed,
and it requires overload resistance capability.
Applications
include pushers, conveyors, cranes, and
other
friction or heavy loads.
Variable
torque means that the load torque will decrease
as
the speed decreases. Normally, overload resistance
capability
is not required. Applications include fans and
pumps.
Low
carrier: Acoustic noise is present.
High
carrier: Acoustic noise is not present.
C6-01
Set
Value
0
(Low
Carrier,
Constant
Torque)
1
(High
Carrier,
Variable
Torque)
Inverter
Overload Protection Level
150%
Inverter rated current/1
min.
120%
Inverter rated current/1
min.
C6-02
(Carrier Frequency Selection)
0:
Low carrier, low noise
1:
Carrier 2 kHz
0:
Low carrier low noise
1:
Carrier 2 kHz
2:
Carrier 5 kHz
3:
Carrier 8.0 kHz
4:
Carrier 10.0 kHz
5:
Carrier 12.5 kHz
6:
Carrier 15 kHz
F:
User-set*
E1-04
and E3-02 (Max. Output Fre-
quency)
150
Hz
400
Hz
L3-02
(Stall Prevention Level During
Acceleration)
150%
120%
L3-06
(Stall Prevention Level During
Operation)
150%
120%
0
Constant Torque
Torque
Motor speed
Variable Torque
Torque
Motor speed
Содержание SYSDRIVE 3G3RV
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