Omron RX Series User Manual page 395

 Reduced torque characteristics
Use the reduced torque characteristics setting for general-purpose (standard) motors.
In an air-cooled motor that uses the fan coupled directly to the motor shaft, the cooling effect
degrades as the motor rotation speed decreases.
This characteristics setting enables overload detection that takes into account such degradation of
the cooling effect at low speeds.
Reduction Factor Characteristics
Reduction
factor
x1.0
x0.8
x0.6
0 5
0 6
 Constant torque characteristics
Use the constant torque characteristics setting for dedicated Inverter motors.
Dedicated Inverter motors are designed to prevent degradation of the cooling effect that arises as
the motor speed increases, except at 5 Hz or less.
For constant torque characteristics, the reduction factor is defined only for frequencies of 5 Hz or
less.
Reduction Factor Characteristics
Reduction
factor
x1.0
x0.8
x0.6
0 2.5
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Inverter output
frequency [Hz]
16 50
20 60
Base frequency
Inverter output
frequency [Hz]
5 60
7 Detailed Functions
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