Fuji Electric frenic mini series, User Manual

Page: 17 / 269

1.1 Features
1-1
Chap. 1
INTRODU
C
TION T
O
FR
ENIC-Mini
1.1 Features
Optimum performance for traversing conveyors
• High starting torque, at 150% or more
Equipped with FUJI's original simplified torque-vector control system and the automatic torque
boost function, these inverters ensure consistent and powerful operation (when automatic torque
boost and slip compensation control are ON and starting frequency is set at 5 Hz or more).
Figure 1.1 Torque Characteristics Data
(Automatic torque boost: ON)
Figure 1.2 Example of Output Torque Characteristics
• Braking resistor connectable to the inverter
FRENIC-Mini series of inverters features a built-in braking transistor (for models of 0.4 kW or
larger), which makes it possible for an optional braking resistor to be connected to increase the
regenerative braking ability for conveyance and transportation machinery that requires strong
braking power. For inverters of 1.5 kW or larger, it is also possible to select a model that
incorporates a built-in braking resistor.
Refer to Chapter 8, Section 8.2.2 "Braking Resistor Built-in Type" for details.
• Trip-free operation
The remarkably improved current limiting function (stall prevention) ensures trip-free operation
even for impact loads.
Figure 1.3 Example of Response for Impact Load Torque
• Stable operation even for a step load
The slip compensation function ensures stable operation even when the motor load fluctuates (step
load).
Figure 1.4 Example of Response for Step Load Torque
(Refer to the note in Figure 1.2 for the test configuration.)