Dc Injection Brake, Zero Speed Control, And Servo Lock - Mitsubishi Electric 800 Series Instruction Manual

Parameters referred to
Pr.0 Torque boost page 589
Pr.3 Base frequency, Pr.19 Base frequency voltage
Pr.12 DC injection brake operation voltage
Pr.47 Second V/F (base frequency), Pr.113 Third V/F (base frequency)
Pr.60 Energy saving control selection
Pr.71 Applied motor, Pr.450 Second applied motor
5.16.7
DC injection brake, zero speed control, and
servo lock
• Timing to stop or braking torque can be adjusted by applying DC injection brake at the time of stopping motor.
Zero speed control can also be selected at the time of the Real sensorless vector control, and zero speed control and
servo lock can be selected at the time of vector control or PM sensorless vector control.
DC injection brake is preventing the motor shaft to turn by applying DC voltage to the motor, and the other hand, zero
speed control is using vector control to maintain 0 r/min. Either way, the motor shaft will not return to its original
position when it is rotated due to external force.
Servo lock will maintain the position of the motor shaft. When a motor shaft is rotated by external force, it goes back to
the original position.
• Select the magnetic flux decay output shutoff function to decay the magnetic flux before shutting off the output at a
stop.
Pr. Name
10 DC injection brake
G100 operation frequency
11 DC injection brake
G101 operation time
12 DC injection brake
G110 operation voltage
802
Pre-excitation selection
G102
1299 Second pre-excitation
G108 selection
850 Brake operation
G103 selection
Setting of operating frequency (Pr.10)
• By setting the frequency to operate the DC injection brake (zero speed control and servo lock) to Pr.10 DC injection brake
operation frequency, the DC injection brake (zero speed control and servo lock) will operate when it reaches this
frequency at the time of deceleration.
• When Pr.10 = "9999", DC injection brake (zero speed control, servo lock) will start when the frequency reaches Pr.13
Starting frequency.
• The DC injection brake operation frequency depends on the stopping method.
Stopping method
Press the STOP key on the
operation panel
Turning OFF of the STF/STR
signal
Set the frequency to 0 Hz
page 591
page 599
page 597
page 423
Initial Setting
value range
0 to 120 Hz
3 Hz
9999
0
0.5 s
0.1 to 10 s
8888
1% 0 to 30%
0
0
1
0
0
1
0
1
0
2
Parameter setting
0.5 Hz or higher in Pr.10
Lower than 0.5 Hz in Pr.10, and 0.5 Hz or
higher in Pr.13
Lower than 0.5 Hz in both Pr.10 and Pr.13
─
page 598
Set the operation frequency for the DC injection brake (zero
speed control and servo lock).
Operate at Pr.13 or lower
Without DC injection brake (zero speed control and servo
lock)
Set the operation time for the DC injection brake (zero speed
control and servo lock).
Operate with X13 signal ON
Set the DC injection brake voltage (torque). When set to "0",
there will be without DC injection brake.
Zero speed control
Servo lock
Zero speed control
Servo lock
DC injection brake operation
Zero speed control (Real sensorless vector control)
Magnetic flux decay output shutoff (Real sensorless vector
control)
DC injection brake operation frequency
Pr.10 setting
0.5 Hz
Pr.10 or Pr.13 setting, whichever larger
Pr.13 setting or 0.5 Hz, whichever smaller
(G) Control parameters
Description
The pre-excitation
operation of the second
motor can be selected.
PARAMETERS
5
GROUP
G
599