Omron RX - 2, Руководство пользователя

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7 Advanced Settings
High-function General-purpose Inverter RX2 Series User’s Manual
7-
3 T
orqu
e Con
tro
l
7
7-3
-1 Speed C
ontrol and
Torque C
ontrol
7-3 Torque Control
The followings show methods to control the motor’s torque.
• Speed control: A method of output control by having the motor speed follow a certain frequency com-
mand and sending torque at a certain speed, and
• A method of output control with change of speed so that output torque follows a certain command
torque.
In the case of controlling by torque command, 08: Sensorless vector control and 10: Sensor vector con-
trol need to be selected in the [AA121] control method.
The torque limit function in speed control can be used for 08: Sensorless vector control and 09: Sensor-
less vector control in the zero speed area and 10: Sensor vector control in the [AA121] control method.
In the zero speed area of 09: Sensorless vector control in the zero speed area, however, control to
send torque is prioritized.
Control gain switching function is used when the motor’s response is changed and when the gain is
switched according to speed.
In the control gain switch function, two types of PI gains are switched and applied by turning ON and
OFF the input terminal function [CAS].
In the gain mapping function to be switched by setting, setting multiple control gains corresponding to
the speed can change the gain with the speed change.
Precautions for Correct Use
• If switching is done by the [PPI] terminal when the control gain mapping function is used,
[HA130] of gain mapping P control P gain 2 will be applied.
• In the case of using this function, sensorless vector control, sensorless vector control in the
zero speed area, and sensor vector control need to be selected in the [AA121] control
method.
• In the case of using this function in SM (PMM) control, P gain is adopted.
7-3-1 Speed Control and Torque Control
Item Speed control Torque control
Control target Control is done to maintain the motor speed
per frequency command. Control is done to output the motor torque
per torque command.
Operation Output will be controlled to maintain the
speed when loading is changed.
If loading becomes bigger, control will be
done to send a lager torque. When loading
becomes smaller, control will be done to
send a smaller torque. When loading is changed, output will be
controlled to maintain the torque.
If loading becomes bigger, control will be
done to maintain the torque by raising the
speed, etc. If loading becomes smaller, con-
trol will be done to maintain the torque by
slowing the speed, etc.
7-3-2 Control Gain Switching Function