Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 159)

5.5 E: Motor Parameters
E parameters cover V/f pattern and motor data settings.
u E1: V/f Pattern for Motor 1
n V/f Pattern Settings (E1-03)
The drive uses a V/f pattern to adjust the output voltage relative to the frequency reference. There are 15 different predefined
V/f patterns (setting 0 to E) from which to select, each with varying voltage profiles, saturation levels (frequency at which
maximum voltage is reached), and maximum frequencies. Additionally, one custom V/f pattern is available (setting F) that
requires the user to create the pattern using parameters E1-04 through E1-10.
n E1-03: V/f Pattern Selection
Selects the V/f pattern for the drive and motor from 15 predefined patterns or creates a custom V/f pattern.
No. Parameter Name Setting Range Default
E1-03 V/f Pattern Selection 0 to 9; A to F F
Setting a Predefined V/f Pattern (Setting 0 to F)
Choose the V/f pattern that best meets the application demands from the table below. Set the correct value to E1-03. Parameter
E1-05 can only be monitored, not changed.
Note: 1. Setting an improper V/f pattern may result in low motor torque or increased current due to overexcitation.
2. Drive initialization does not reset parameter E1-03.
Table 5.8 Predefined V/f Patterns
Setting Specification Characteristic Application
0 50 Hz
Constant torque
For general purpose applications. Torque remains constant
regardless of changes to speed.
1 60 Hz
2 60 Hz (with 50 Hz base)
3 72 Hz (with 60 Hz base)
4 50 Hz, Variable torque 1
Variable torque
For fans, pumps, and other applications where the required
torque changes as a function of the speed.
5 50 Hz, Variable torque 2
6 50 Hz, Variable torque 3
7 50 Hz, Variable torque 4
8 50 Hz, Mid starting torque
High starting torque
Select high starting torque when:
• Wiring between the drive and motor exceeds 150 m.
• A large amount of starting torque is required.
• An AC reactor is installed.
9 50 Hz, High starting torque
A 60 Hz, Mid starting torque
B 60 Hz, High starting torque
C 90 Hz (with 60 Hz base)
Constant output
Output voltage is constant when operating at greater than
60 Hz.
D 120 Hz (with 60 Hz base)
E 180 Hz (with 60 Hz base)
F
<1>
60 Hz Variable torque
Used for variable torque applications. The default setting is
the same as V/f pattern Setting 7.
<1> Setting F enables a custom V/f pattern by changing parameters E1-05. When the bypass is shipped, the default values for parameter E1-05 is are
equal to predefined V/f pattern 1.
The following tables show details on predefined V/f patterns.
5.5 E: Motor Parameters
YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual 159
5
Programming