Energy-Saving - YASKAWA Varispeed G7 Series Instruction Manual



Energy-saving

To perform energy saving, set b8-01 (Energy Saving Mode Selection) to 1. Energy-saving control can be per-
formed using both V/f control and vector control. The constants to be adjusted are different for each. In V/f
control, adjust b8-04 to b8-06, and in vector control, adjust b8-02 and b8-03.
Related Constants
Name
Con-
stant
Display
Number
Energy-saving
mode selection
b8-01
Energy Save
Sel
Energy-saving
gain
b8-02
Energy Save
Gain
Energy-saving
filter time con-
stant
b8-03
Energy Save
F.T
Energy-saving
coefficient
b8-04
Energy Save
COEF
Power detection
filter time con-
b8-05
stant
kW Filter Time
Search opera-
tion voltage
limiter
b8-06
Search V Limit
Motor rated slip Sets the motor rated slip in Hz
E2-02
Motor Rated
Slip
Motor rated
output
E2-11
Mtr Rated
Power
* 1. The factory setting is 1.0 when using flux vector control.
* 2. The factory setting is 2.00 s when Inverter capacity is 55 kW min.
The factory setting will change when the control method is changed. The open-loop vector 1 factory setting is given.
* 3. By setting E2-11 (Motor rated output) the appropriate value will be set.
* 4. The factory settings depend on the Inverter capacity. The values for a 200 V Class Inverter of 0.4 kW are given.
Description
Select whether to enable or dis-
able energy-saving control.
0: Disable
1: Enable
Set the energy-saving gain with
the open-loop vector control
method.
Set the energy-saving filter time
constant with the open-loop vec-
tor control method.
Set the maximum motor effi-
ciency value.
Set the motor rated capacity in
E2-11, and adjust the value by 5%
at a time until output power
reaches a minimum value.
Set the time constant for output
power detection.
Set the limit value of the voltage
control range during search opera-
tion.
Perform search operation to opti-
mize operations using minute
variations in voltage using
energy-saving control. Set to 0 to
disable the search operation.
100% is the motor base voltage.
units.
These set values will become the
reference values for slip compen-
sation.
This constant is automatically set
during autotuning.
Set the rated output of the motor
in units of 0.01 kW.
This constant is automatically set
during autotuning.
Control Methods
Change
Setting Factory during
V/f
Range Setting Opera-
V/f with
tion
PG
0 or 1 0 No A A
0.0 to
0.7
Yes No No
10.0
*1
0.00 to
0.50 s
Yes No No
10.0
*2
0.0 to
288.20
No A A
655.00
*3 *4
0 to
20 ms No A A
2000
0 to
0% No A A
100
2.90
0.00 to
No A A
Hz
20.00
*4
0.00 to
0.40
No Q Q
650.00
*4
Individual Functions
MEMO
Open Open
BUS
Flux
Loop Loop
Regis-
Vec-
Vector Vector
ter
tor
1 2
A A A 1CCH
A A A 1CDH
A A A 1CEH
No No No 1CFH
No No No 1D0H
No No No 1D1H
A A A 30FH
Q Q Q 318H
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