Sanken S06-4A005-B Instruction Manual page 112

rise/drop according to the load situation. When it is used on the devices with a problem when the speed is reducing, the
combination of an auto energy saving mode (speed control) and the use of PID control system with a speed sensor can
make a compensation to the energy saving and the speed. Refer to F30xx ~ F33xx for PID functions.
· The time required for voltage rising to realize a high-efficient voltage value will be changed according to the actual load
condition.
· For changes of pre-set frequency, stopping command and rapid load alteration, in order to avoid the reducing of driving
power caused by inadequate loading torque, the decreased or increased output voltage will be recovered to the original
voltage within several milliseconds.
· Different from the actions in simple energy saving, the deceleration will be enabled simultaneously when the stopping
command is carried out, therefore it equals to the normal stopping time. But, when the regenerating energy cannot be used
fully, the deceleration time will be prolonged through the protective function.
· For fans and pumps, it is effective for the square torque during light loading, but it may be noneffective for the constant
torque during heavy loading.
· When restarting by the functions of speed tracking, alarm auto resetting, instantaneous stop restarting and etc., the simple
energy saving function should be set from the beginning. (Speed tracking can be added)
· Energy saving action functions only when the loaded torque alteration is stable during constant speed running. Therefore,
when the frequencies are changed by analog frequency input and other methods, the energy can also be saved by increasing
the frequency matching range (F1508) in case the frequency is changed very slowly.
· Linear Graphic is used for the V/f figure of auto energy saving mode.
Operation command
② F1001=2, 3 (speed control mode)
● The function of energy saving is realized by increasing motor frequency for arbitrary load torque, basing on the speed control
mode (F1001=2: speed sensorless vector control; or F1001=3: speed sensor vector control).
● Different from manually adjusting of optimum voltage in simple energy saving, this function is used to reduce the motor
consumption under normal operation; even the load has been changed, this function is still available for high-efficient
operation under arbitrary load torque.
● Since this function is based on the speed controlling, the speed should also be compensated during energy saving.
1) Actions of auto energy saving mode
· This function will be enabled by only setting the auto energy saving mode (F1901=2).
· Start the running of the inverter with this auto energy saving mode, after stable & normal operation is reached, the control
of auto energy saving will be started.
· Auto energy saving function works continuously under the energy saving actions, therefore, it is still effective even when
the torque is changed very slowly. Also, for the frequency changes and fast torque changes, it can recover to normal
operation from energy saving mode and eliminate the inadequate torque caused by load torque changes.
2) Attentions
Normal V/f output voltage
Action scope
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Output frequency
Output voltage
Action scope Time