YASKAWA Varispeed E7 User Manual

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* The high start up torque is provided 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.
Characteristic Application
Set
Value
Specifications
Constant Torque
Characteristic
These patterns are used in general applica-
tions where the load torque is fixed, regard-
less of rotation speed, e.g. for linear
transport systems.
0 (F) 50 Hz specifications
1 60 Hz specifications
2
60 Hz specifications, voltage saturation at
50 Hz
3
72 Hz specifications, voltage saturation at
60 Hz
Variable torque
characteristic
These patterns are used for loads with
torque proportional to the square or cube of
the rotation speed, such as fans and pumps.
4
50 Hz specifications,
cubical torque charac-
teristic
5
50 Hz specifications, quadratic torque char-
acteristic
6
60 Hz specifications, cubical torque charac-
teristic
7
60 Hz specifications, quadratic torque char-
acteristic
High Startup
Torque
*
Select a 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
• An AC reactor is inserted in the Inverter
input or output.
8
50 Hz specifications, medium startup
torque
9 50 Hz specifications, large startup torque
A
60 Hz specifications, medium startup
torque
B 60 Hz specifications, large startup torque
Fixed Output
Operation
This pattern is used for frequencies of
60 Hz or higher. A fixed voltage is applied.
C
90 Hz specifications, voltage saturation at
60 Hz
D
120 Hz specifications, voltage saturation at
60 Hz
E
180 Hz specifications, voltage saturation at
60 Hz
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YASKAWA Varispeed E7 Specifications

General

Brand	YASKAWA
Model	Varispeed E7
Category	DC Drives
Language	English