Parameter
Motor brake and stop operation
FR-D700 SC EC
6 - 81
6.8
Motor brake and stop operation
6.8.1
DC injection brake (Pr. 10 to Pr. 12)
The FR-D700 SC EC frequency inverter has an adjustable DC brake function.
This function uses the eddy current brake principle, stopping the motor by applying a pulsed DC
voltage to the motor stator.
The pulsed DC voltage applied to the motor stator can achieve stopping torques of around 25
to 30% of the motor’s rated torque.
The above parameters can be set when Pr. 160 = 0.
Purpose
Parameters that must be set
Refer to
Section
Motor braking torque adjustment
DC injection brake
Pr. 10–Pr. 12
Improve the motor braking torque
with an option
Selection of a regenerative brake
Pr. 30, Pr. 70
Coast the motor to a stop
Selection of motor stopping method
Pr. 250
Pr.
No.
Name
Initial Value
Setting
Range
Description
Parameters referred to
Refer to
Section
10
DC injection
brake operation
frequency
3Hz
0–120Hz
Set the operation frequency of the
DC injection brake.
13
71
Starting
frequency
Applied motor
11
DC injection
brake operation
time
0.5s
0
DC injection brake disabled
0.1–10s
Set the operation time of the DC
injection brake.
12
DC injection
brake operation
voltage
FR-D720S-008SC and
014SC
6%
0–30%
Set the DC injection brake voltage
(torque). When "0" is set, DC injec-
tion brake is disabled.
FR-D720S-025SC or
more,
FR-D740-012SC to
160SC
4%
Summary of Contents for FR-D720S SC EC
Page 2: ......
Page 4: ......
Page 24: ...Description of the case Product checking and part identification 1 4 ...
Page 108: ...Operation panel Operation 4 20 ...
Page 436: ...Setting for the parameter unit and operation panel Parameter 6 286 ...
Page 484: ...Measurements on the main circuit Maintenance and inspection 8 14 ...
Page 504: ...Specification change Appendix A 20 ...
Page 505: ......
Page 506: ......
Page 510: ...Index Appendix A 24 ...
Page 511: ......