Sanken S06-4A005-B Instruction Manual page 111

7-3 Description of Functions
4) Attentions
Simple energy saving function only decreases the output voltage of the inverter. Therefore, since the load conditions are
different, the voltage drop may result in the slow down of the speed. In devices with low speed forbidden, the energy
saving and rotating speed should be compensated by the combination of auto energy saving mode (speed control) and PID
control.
For loads without energy saving even when the output voltage is decreased, never use this method.
When restarting by the functions of speed tracking, alarm auto resetting, instantaneous stop restarting and etc., the simple
energy saving function should be started from the beginning. (Speed tracking can be added)
Since the stopping action in simple energy saving is used for deceleration after the output voltage is recovered to the
original value, the actual stopping time will change according to the recovering time of the voltage. When time sequence
control is adopted, please take consideration of this recovery time.
Operation command
Time
(2) About auto energy saving function
The auto energy saving function is based on the V/f control method and speed control method.
Please make a selection with a motor control mode of F1001.
① F1001=1 (V/f mode)
● Based on V/f mode, the energy saving function is realized by supplying high-frequency voltage to the torque required by the
load.
● Different from the simple energy saving function with manual adjusting of optimal voltage, this function can automatically
calculate the high-frequency voltage value even when the load is changed, therefore realizing a stable energy saving.
● When energy saving, motor speed control and other feedback controls are operated synchronously, they can be used together
with PID controlling function when a sensor is installed on the system. (Please set F3002 for PID feedback input)
1) Actions of auto energy saving mode (V/f mode)
· The auto energy saving mode can be used for the starting of inverter operation and the control of auto energy saving mode.
During energy saving, the output voltage for high-efficient operation will be calculated and the voltage will be changed
slowly.
Whereas, in case that the acceleration / deceleration time is very short, the energy saving mode will be enabled after
constant-speed operation is entered.
2) Attentions
· This function only controls the output voltage of the inverter. Therefore, the speed may decrease because of the pressure
Simple energy-saving time
Simple energy-saving rate
Output frequency
Normal V/f output voltage
Simple energy-saving rate
Output voltage
Action scope
- 110 -
of simple energy saving