Sanken SVCO6, Инструкция по эксплуатации, Страница: 181 / 326

- 179 -
-
179
-
C
h
ap
ter
7
7-3 Description of Functions
Energy-saving function
F1901 Energy-saving mode selection
F1902 Simple energy saving rate
F1903 Simple energy saving time
Decrease the output voltage and realize an energy-saving operation. Simple energy saving is an arbitrarily set function, it
is the mode to automatically decrease the output voltage and control the highest efficiency.
Code No. Function Name Data Content
Setting
Resolution
Factory
Presets
F1901 Energy-saving mode selection 0: No function
1: Simple energy-saving mode (V/f mode)
2: Auto energy-saving mode
1 0
F1902 Simple energy saving rate
0
-
50%
1% 0
F1903 Simple energy saving time 0
-
65000s 1s 10
(1)F1901=1 : Simple energy saving (V/f)
●
With the V/f mode and after the specified time during the constant speed running after the acceleration, the voltage
will be decreased by a certain ratio, therefore realizing the function of energy saving.
●
For loads of general fans and pumps, the input current is decreased by reducing the output voltage of the inverter
in the V/f constant mode, therefore realizing the energy saving. Simple energy saving is adjusted manually to form
a voltage-frequency relationship which matches with the load and torque characteristics, and realizing the energy
saving.
1) Related functional code
F1901=1 Simple energy saving mode (V/f)
F1902=0
-
50% Simple energy saving rate
F1903=0
-
65000s Simple energy saving timer T1
2) Actions of simple energy-saving mode

If operation command is input into the inverter, normal acceleration will start and then enter the constant speed
running status.
When simple energy saving mode (F1901=1) can be selected, after certain time specified by the timer T1
(F1903) during constant speed running, the simple energy saving function will be enabled. For the output
voltage of currently output signal, the simple energy saving is the action to decrease the output voltage by the
ratio specified by F1902. Before energy saving and when the output voltage is about 200V, set F1902=50%, the
output voltage will be decreased to about 100V after the time period specified by timer T1.

Since energy saving rate (F1902) can be adjusted even when the inverter is running, please set the values
which are compliant with the load characteristics.
When simple energy saving is enabled, the afterwards output voltage will maintain the decreasing ratio to
realize the V/f control even when the command frequency is modified. However, when the stoppage command
of the inverter is enabled, the voltage will be recovered to the original value slowly, deceleration will be carried
out when the voltage is fully recovered.
3) Decrease output voltage and recovery time

When simple energy saving is enabled, in order to avoid large changes of loaded torque, the voltage should
drop slowly, a slope of about ten seconds is required for maximum output voltage value.
Example 1) When maximum output voltage is 440V, an output voltage of 200V will be run. If the rate is
50%, about 2.3 seconds is required to decrease the voltage to about 100V.

In case that the energy saving is disabled through stopping command, in order to avoid the poor control caused
by inadequate torque, the voltage recovery should be carried more quickly. For maximum voltage output, the
slope is about one second.
Example 2) For simple energy saving in example 1, about 0.23 second is required to recover to original
voltage through the stopping command. A deceleration will be carried out after the recovery.