8-4
8.4 Automatic Energy Savings Function (11-19)
In the V/F control mode the automatic energy saving (AES) function automatically adjusts the output voltage and
reduces the output current of the inverter to optimize energy savings based on the load.
The output power changes proportional to the motor load. Energy savings is minimal when the load exceeds 70%
of the output power and savings become greater when the load decreases.
The parameter of automatic energy saving function has been set at the factory before shipment. In general, it is
no need to adjust. If the motor characteristic has significant difference from TECO standard, please refer to the
following commands for adjusting parameters:
Enable Automatic Energy Savings Function
To set parameters 11-19 to 11-24:
- After power-up press the
DSP/FUN
key
- Select
11 Auxiliary Function Group
- Press
READ/ ENTER
key
- Select parameter -19 to -24
with the
UP/DOWN
▲ and ▼ keys and press the
READ/ ENTER
key.
(1) To enable automatic energy saving function set 11-19 to 1.
(2) Filter time of automatic energy saving (11-20)
(3) Commissioning parameter of energy saving (11-21 to 11-22)
In AES mode, the optimum voltage value is calculated based on the load power requirement but is also affected
by motor temperature and motor characteristic.
In certain applications the optimum AES voltage needs to be adjusted in order to achieve optimum energy
savings. Use the following AES parameters for manual adjustment:
11-21:
Voltage limit value of AES commissioning operation
Sets the voltage upper limit during automatic energy saving. 100% corresponds to 230V or 460V depending on
the inverter class used.
11-21
11-21
Voltage Limit
Output
Voltage
Voltage limit value of commissioning operation