Filter
Top Products
16/28 BCN-C22005-675
1.8 Braking operation selection for vector control, PM sensorless vector
control (Pr.802)
• Select the braking operation when the pre-excitation is performed with Pr.802 Pre-excitation selection from either
zero speed control or servo lock.
• The relation between the DC injection brake operation and pre-excitation operation is as follows.
The pre-excitation operation selection is available under PM sensorless vector control.
Pr.802 setting
Pre-
excitation
Description
0
(initial value)
Zero speed
control
It will try to maintain 0 r/min so the motor shaft will not rotate even when a load is
applied. However, it will not return to its original position when the shaft moves due to
external force.
It will not perform position control, but operate only with the speed control.
1Servo lock
It will try to maintain the position of the motor shaft even if a load is applied. When the
shaft moves due to external force, it will return to its original position after the external
force is removed.
To perform the position control, this loop gain can be adjusted with Pr.422 Position
control gain.
Control method
Control
mode
Pr.802 Pr.850 Deceleration stop LX-ON
X13-ON
(Pr.11 = "8888")
V/F control ―――DC injection brake ― DC injection brake
Advanced magnetic flux
vector control
―――DC injection brake ― DC injection brake
Real sensorless vector
control
Speed
― 0 DC injection brake
Zero speed Zero speed
― 1 Zero speed
― 2
Magnetic flux decay
output shutoff
Zero speed Zero speed
Torque
― 0 DC injection brake
Zero speed Zero speed
― 1 Zero speed
― 2
Magnetic flux decay
output shutoff
Zero speed Zero speed
Vector control
Speed
0 ― Zero speed Zero speed Zero speed
1 ― Servo lock Servo lock Servo lock
Torque ――Zero speed Zero speed Zero speed
Position ――― Servo lock ―
PM sensorless vector
control,
low-speed range high-
torque mode disabled
Speed ――DC injection brake ――
PM sensorless vector
control,
low-speed range high-
torque mode enabled
Speed
0 ― Zero speed Zero speed ―
1 ― Servo lock Servo lock ―
Position ――― Servo lock ―
VectorVectorVector
bcnc22005635.fm 16 ページ ２０１４年１２月１１日 木曜日 午後５時５９分