Motor Constants Selection - Omron 3G3MX2 User Manual

"H" Group: Motor Constants Functions
Func.
Code
H033 Motor parameter Io
(auto-tuning data)
H233 2nd motor parameter Io
(auto-tuning data)
H034 Motor parameter J
(auto-tuning data)
H234 2nd motor parameter J
(auto-tuning data)
H050 Slip compensation P gain for
V/f control with FB
H051 Slip compensation I gain for V/f
control with FB
3-8-1

Motor Constants Selection

"H" Function
Name
0.01~655.35A
0.001~9999.000 kgm
0.00~10.00
0~1000
Adjust the motor constant settings to the motor to be driven by the inverter.
When using a single inverter to drive multiple motors in the control mode
based on VC, VP, or free V/F characteristics, calculate the total capacity of the
motors, and specify a value close to the total capacity for the motor capacity
selection (/).
When the automatic torque boost function is used, the motor constant settings
that do not match with the motor may result in a reduced motor torque, or
unstable motor operation.
You can select the motor constants that are used when the control mode is
the sensorless vector control (hereafter "SLV") from the following three types.
1. Motor constants of standard induction motor
When /=, motor constants in / to / are tak-
en. The initial values in / to / are standard motor's val-
ues.
2. Motor constants obtained by off-line auto-tuning
When /=, motor constants in / to / are tak-
en, which are obtained by off-line auto-tuning.
3. Arbitrarily set motor constants
In above (1) and (2) cases, motor constants can be adjusted manually. Ac-
cording to value of /, change motor constants in / to
/ or / to / if necessary.
*1) Convert the inertia (J) to the motor shaft value. Bigger J value will result in
a quicker in motor response and quicker in torque increase. Smaller J value
will result in the opposite way.
*2) In the SLV modes, inverter may give out reverse to given operation com-
mand in the low speed range as a nature of those controls. In case there is a
specific inconvenience for example reverse rotation damages the machine,
enable the reverse run protection ().
Run
Mode
Description
Edit
2
Section 3-8
Defaults
EU Units

A
Depends on
the motor

A
capacity

kgm²
Depends on
the motor

kgm²
capacity

0.2 -

2 -
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