Vector Control With Sensor - Omron RX2 Series User Manual

7-2-10 Vector Control with Sensor

This application is used in the following cases: It carries a heavy load; that require control needing a
high torque; and that require position control.
The feedback of the encoder signal from the motor allows highly accurate frequency control from the
low-speed range.
In the vector control with sensor, to control the motor, the frequency and the output voltage are cor-
rected and the response is adjusted with respect to the load inertia.
Accordingly, it requires the acquisition of the motor constant and the load inertia by means of auto-tun-
ing or the like.
In the vector control with sensor, adjustment of the response is possible. The vector control with sensor
can be used in applications that require a better follow-up performance of the speed to the command.
In the vector control with sensor, the position control mode can be used.
A motor constant and the load inertia must be set with auto-tuning, etc.
When a motor is hunting and vibrating, an adjustment of the speed response [HA115] and [HC120] may
improve the state of the motor.
Precautions for Correct Use
• Conducting the vector control with sensor requires the encoder feedback from the motor.
• When [CA-90] = 02, Input terminals [A] and [B] are switched to the terminals for feedback
control. When [CA-90] ≠ 02, terminals [EAP], [EBP], [EAN], and [EBN] of the PG option unit
are enabled.
• See 7-2-16 Encoder Feedback Control on page 7-37.
• In the vector control with sensor, set appropriately the motor capacity, the number of motor
poles, the base frequency, the rated voltage, and the rated current in order to conduct motor
control.
• As the motor's frame number becomes smaller and smaller from the one of the maximum
applicable motor, sufficient operation characteristics becomes more difficult to get.
• In the case that a length of a wire is over 20 m, the motor's characteristic may be below what
are expected.
• Once [HC114] Counter direction run protection selection, 1st-motor is enabled, output direc-
tions are limited.
• Once [HC113] Secondary resistance correction, 1st-motor is enabled, a slip change of motor
rotation according to temperature change is corrected. Connect a thermistor, which mea-
sures the motor temperature, to TH terminals.
High-function General-purpose Inverter RX2 Series User's Manual
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