Motor Parameter Settings; Motor Capacity/Pole Number Selection; Electronic Thermal Function - Omron MX2 Series User Manual

5 Basic Settings
5-3

Motor Parameter Settings

5-3-1

Motor Capacity/Pole Number Selection

Set the following parameters according to your motor.
Parameter
No.
H003 1st Motor Capacity
H203 2nd Motor Capacity
H004 1st Motor Pole Number
H204 2nd Motor Pole Number
5-3-2

Electronic Thermal Function

The electronic thermal function prevents the motor from overloading and burning.
Set the rated current of your motor in the Electronic Thermal Level parameters.
In the Electronic Thermal Characteristics Selection parameters, set the motor torque characteristics as
follows, according to the motor specifications.
Characteristics
Reduced torque
characteristics
Constant torque
characteristics
Derating of the output current is required depending on the installation environment and the Carrier Fre-
quency (b083). For derating of each inverter model, refer to A-1 Derating on page A-2.
In the Electronic Thermal Level, set the output current value to be derated.
This setting is, however, unnecessary if the Electronic Thermal Level is already set to the derating
value or lower.
Precautions for Correct Use
• In the 3G3MX2-V1 Series Inverter, the electric thermal function is separated for the inverter
and for the motor. This enables you to change the operation characteristics of the motor elec-
tronic thermal function according to the thermal time constant of the motor in use. For how to
change these characteristics, refer to 7-8-2 Motor Electronic Thermal Function on page 7-73.
• To set the electronic thermal function to work as with the conventional 3G3MX2 Series, set
the Motor Electronic Thermal Selection (b910) to 00 (Disabled).
• To connect several motors to a single inverter, set the Electronic Thermal Level to the rated
output current of the inverter and install a thermal relay etc. for each motor.
• Before setting the electronic thermal function, set the 1st/2nd Motor Capacity (H003/H203)
and the 1st/2nd Motor Pole Number (H004/H204) correctly according to your motor.
5 - 16
Function name
0.1/0.2/0.4/0.55/0.75/1.1/1.5/2.2/3.0/
3.7/4.0/5.5/7.5/11.0/15.0/18.5
0.1/0.2/0.4/0.55/0.75/1.1/1.5/2.2/3.0/
3.7/4.0/5.5/7.5/11.0/15.0/18.5
2/4/6/8
10 to 48: Do not set.
2/4/6/8
10 to 48: Do not set.
Use this setting for general-purpose motors.
In an air-cooled motor that uses the rear 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.
Use this setting for dedicated inverter motors.
Dedicated inverter motors are designed to prevent degradation of the cooling effect that
arises as the motor speed increases. This characteristics setting provides overload detec-
tion independent of the motor rotation speed.
Data
Description
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Default data Unit
Maximum applica-
kW
ble motor capacity
Maximum applica-
kW
ble motor capacity
4 pole
4 pole