Fuji Electric FRENIC-MEGA, Инструкция по эксплуатации

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. 5
FUNCTION C
O
DES
F codes
• Auto torque boost
If the auto torque boost is selected, the inverter automatically optimizes the output voltage to fit the motor with its load.
Under light load, the inverter decreases the output voltage to prevent the motor from over-excitation. Under heavy load, it
increases the output voltage to increase the output torque of the motor.
• Since this function relies also on the characteristics of the motor, set the base frequency 1 (F04), the rated voltage
at base frequency 1 (F05), and other pertinent motor parameters (P01 through P03 and P06 through P99) in line
with the motor capacity and characteristics, or else perform auto-tuning (P04).
• When a special motor is driven or the load does not have sufficient rigidity, the maximum torque might decrease
or the motor operation might become unstable. In such cases, do not use auto torque boost but choose manual
torque boost per F09 (F37 = 0 or 1).
„ Auto energy saving operation (H67)
If the auto energy saving operation is enabled, the inverter automatically controls the supply voltage to the motor to
minimize the total power loss of motor and inverter. (Note that this feature may not be effective depending upon the motor
or load characteristics. Check the advantage of energy saving before you actually apply this feature to your machinery.)
You can select whether applying this feature to constant speed operation only or applying to constant speed operation and
accelerating/decelerating operation.
Data for H67 Auto energy saving operation
0 Enable only during running at constant speed
1
Enable during running at constant speed or accelerating/decelerating
(Note: For accelerating/decelerating, enable only when the load is light.)
If auto energy saving operation is enabled, the response to a motor speed change from constant speed operation may be slow.
Do not use this feature for such machinery that requires quick acceleration/deceleration.
• Use auto energy saving only where the base frequency is 60 Hz or lower. If the base frequency is set at 60 Hz or
higher, you may get a little or no energy saving advantage. The auto energy saving operation is designed for use
with the frequency lower than the base frequency. If the frequency becomes higher than the base frequency, the
auto energy saving operation will be invalid.
• Since this function relies also on the characteristics of the motor, set the base frequency 1 (F04), the rated voltage
at base frequency 1 (F05), and other pertinent motor parameters (P01 through P03 and P06 through P99) in line
with the motor capacity and characteristics, or else perform auto-tuning (P04).
• Under the vector control without speed sensor, the auto energy saving operation is disabled.
F38, F39 Stop frequency (Detection mode, Holding time)
(Refer to F23.)
F40, F41 Torque Limiter 1-1,
E16, E17 Torque Limiter 2-1, Torque Limiter 2-2
Torque Limiter 1-2
H73 Torque Limiter (Operating conditions)
H76 Torque Limiter (Frequency increment limit for braking)
Under V/f control
If the inverter’s output torque exceeds the specified levels of the torque limiters (F40, F41, E16, E17, and E61 to E63), the
inverter controls the output frequency and limits the output torque for preventing a stall.
To use the torque limiters, it is necessary to configure the function codes listed in the table below.
In braking, the inverter increases the output frequency to limit the output torque. Depending on the conditions during
operation, the output frequency could dangerously increase. H76 (Frequency increment limit for braking) is provided
to limit the increasing frequency component.