Optimum performance for traversing conveyors
Motor speed [r/min]
Torque [%]
0
Motor speed [r/min]
[Instability characteristics]
0
FRENIC-Mini
Conventional Fuji inverter
0
100
50
60
(50)
120
(100)Output frequency [Hz]
Short-time operation torque
Continuous operation
allowable range
Output
torque
[%]
150
6
(5)
100% output torque refers to
the rated torque of the motor
driven at 60 Hz.
High starting torque, at 150% or more
Equipped with Fuji
,
s original simplified torque-vector control
system and the automatic torque boost function, the inverter
provides consistent powerful operation (when automatic torque
boost is ON, slip compensation control is ON, and when
running at 5Hz or more).
Trip-free operation
The remarkably improved current limiting function (stall
prevention) allows trip-free operation even for an impact load.
Stable operation even for a step load
The slip compensation function permits stable operation even
when the motor load fluctuates (step load).
Braking resistor connectable to the inverter
Owing to a built-in braking transistor (1/2HP or larger), an optional
braking resistor can be connected to increase the regenerative
braking capacity for conveyance and transportation machinery that
require large braking power. For inverters of 2HP or larger, it is
possible to select the model that incorporates a braking resistor.
Reduced motor instability at low speed
Fuji
,
s unique control method improves voltage control
performance and reduces motor instability at low speed to about a
half or less (at 1Hz) compared with that of conventional inverters.
Automatic energy-saving provided
as a standard function
By controlling the motor loss to a minimum, FRENIC-Mini
further saves electric power when applied to fans or pumps.
Cooling fan ON/OFF control function
The inverter
,
s cooling fan can be turned off while the fan or
pump is stopped for noise reduction and energy savings.
PID control function
Permits motor operation while controlling temperature,
pressure, or flow rate without using an external device such as
temperature controller.
The highly used functions for fans and pumps
[Output torque characteristic data]
[Torque characteristics]
Safety Precautions
1. The contents of this catalog are provided to help you select the product model that is best for you. Before actual use, be sure
to read the Instruction Manual/User
,
s Manual thoroughly to assure correct operation.
2. This product is not designed and manufactured for use in machines or systems which human life is dependent upon. If you
are studying use of the products in this brochure for special purposes such as for control of nuclear power stations, in sea, air
or space craft, in medical or land transportation equipment, or any related systems, please contact the business office of Fuji
Electric. If these products are to be used in any equipment in which there is a risk to human life or the possibility of a major
loss in the event of failure, be sure to install the appropriate safety equipment.
The above graph shows an example of torque characteristics obtained when FRENIC-Mini is
combined one-to-one with Fuji
,
s standard three-phase motor (8-type series: 4 poles).
Energy saving rate varies with the motor characteristics.
Time
Motor speed
Load torque
Output current
Time
Motor speed
Load torque
Output current
0s 2.5s 5s 7.5s 10s 12.5s
0s 2.5s 5s 7.5s 10s 12.5s
When damper or valve is used
Energy
saved
Inverter control
(Automatic energy-saving mode)
Inverter control
(V/f control)
Air or liquid flow rate Q [%]
Required power P
[%]
110
90
80
70
60
50
40
30
20
10
020
10
30 40 50 60 70 80 90 100
[Energy savings effect]
Energy savings rate varies with the motor characteristics.
100
3
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