Sanken SVCO6, Инструкция по эксплуатации, Страница: 184 / 326

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7-3 Description of Functions
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
· Even though the auto energy saving mode is set, normal control actions will be used during the
acceleration/deceleration.
· Different from the stopping actions in simple energy saving, since this function enters the deceleration together
with stopping command, the stopping time equals to the time of normal stopping actions. However, when the
regenerated energy cannot be used fully and a torque limiter is required, the deceleration time will be
prolonged according to the protective function.
· Auto energy saving control is effective during constant-torque operation. When rated speed has been exceeded
during constant-power operation, a weak magnetic control will be adopted as normal modes.
· The function of auto energy saving is more obvious under light loads.