YASKAWA varispeed G7 CIMR-G7B series Instruction Manual page 328

Setting V/f Pattern
Set the V/f pattern in E1-03 when using V/f control (with or without a PG). There are two methods of setting
the V/f pattern: Select one of the 15 pattern types (set value: 0 to E) that have been set beforehand, or set a
user-defined V/f pattern (set value: F).
The factory setting for E1-03 is F. The contents of E1-03 when factory-set to F are the same as when E1-03 is
set to 1.
To select one of the existing patterns, refer to the following table.
Characteristic
Constant Torque
Characteristic
Variable torque
characteristic
High Startup
Torque (See
*
Note)
Fixed Output
Operation
* The torque is protected by the fully automatic torque boost function, so normally there is no need to use this pattern.
When you select these patterns, the values of constants E1-04 to E1-10 are changed automatically. There are
three types of values for E1-04 to E1-10, depending on the Inverter capacity.
0.4 to 1.5 kW V/f pattern
•
2.2 to 45 kW V/f pattern
•
55 to 300 kW V/f pattern
•
The characteristics diagrams for each are shown in the following pages.
-122
6
Application
This pattern is used in general applications.
Used when the load torque is fixed, regard-
less of rotation speed, for linear transport
systems.
This pattern is used for loads with torque
proportional to two or three times the rota-
tion speed, such as fans and pumps.
Select the high startup torque V/f pattern
only in the following cases.
• The wiring distance between Inverter and
motor is large (approx. 150 m min.)
• A large torque is required at startup (ele-
vator loads, etc.)
• An AC reactor is inserted in the Inverter
input or output.
• You are operating a motor that is less
than optimum.
This pattern is used for frequencies of 60
Hz or higher. A fixed voltage is applied.
Set
Specifications
Value
0 (F) 50 Hz specifications
1 60 Hz specifications
60 Hz specifications, voltage saturation at
2
50 Hz
72 Hz specifications, voltage saturation at
3
60 Hz
×
4
50 Hz specifications,
5 50 Hz specifications,
6 60 Hz specifications,
7 60 Hz specifications,
50 Hz specifications, medium startup
8
torque
9 50 Hz specifications, large startup torque
60 Hz specifications, medium startup
A
torque
B 60 Hz specifications, large startup torque
90 Hz specifications, voltage saturation at
C
60 Hz
120 Hz specifications, voltage saturation at
D
60 Hz
180 Hz specifications, voltage saturation at
E
60 Hz
3 decrement
×
2 decrement
×
3 decrement
×
2 decrement