328
PARAMETER
2.13 Selection of DC injection brake and
regenerative brake
2.13.1 DC injection brake [Pr. 10 to 12]
(common)
DC injection brake operation is a braking operation which
prevents the motor shaft from rotating by directly applying
DC voltage to the motor.
When decelerating, the motor run by the inverter to stop,
DC injection brake at 3Hz or less is applied. Operation time
of this DC injection brake and braking torque (DC injection
brake voltage) can be adjusted.
In addition, DC injection brake operation frequency can be
adjusted.
Refer to page 325 for brake operation during Real
sensorless vector control and vector control.
(1) Operation frequency setting [Pr. 10]
When the DC injection operating frequency is set to
[
Pr. 10
] and the output frequency reaches to the set
frequency during deceleration, the DC voltage is
applied to the motor.
When the output frequency decelerates to the set
frequency of [
Pr.13 Starting frequency
] while [
Pr.10
=
9999] in
, DC voltage applies to the
motor.
(2) Operation time setting (X13 signal) [Pr. 11]
In [
Pr. 11
], set the time of the DC injection brake.
When the motor does not stop due to large inertia (J),
increasing the setting produces an effect.
When [
Pr. 11
= 0s], the DC injection brake is disabled.
(At a stop, the motor coasts.)
For
, turning ON the X13 signal when [
Pr. 11
=
8888] starts DC injection brake. Turning ON the X13
signal starts DC injection brake even during inverter
operation.
For the terminal used for the X13 signal input, set 13
in any of [
Pr. 178 to 189
] to assign the function.
When the X13 signal is ON with [
Pr. 11
= 8888] under
Real sensorless vector control, zero speed control is
activated regardless of the setting of [
Pr. 850 Brake
operation selection
]. (Refer to page 325)
common
[Pr. ]
Name
Initial Value
Setting
Range
Description
Available Inverters
10
DC injection brake
operation frequency
3Hz
0 to 120Hz
Set the operation frequency of the DC
injection brake (zero speed control, servo
lock).
{
{
{
9999
Operated at [
Pr. 13
] or less.
—
11
DC injection brake
operation time
0.5s
0
Without DC injection brake (zero speed
control, servo lock)
{
{
{
0.1 to 10s
Set the operation time of the DC injection
brake (zero speed control, servo lock).
8888
Operates when X13 signal is ON
{
—
—
12
DC injection brake
operation voltage
0.1K, 0.2K
6%
0 to 30%
Set the DC injection brake voltage (torque).
When 0 is set, DC injection brake is
disabled.
{
{
{
0.4K to 7.5K
4%
11K to 55K
2%
75K or more
1%
A700
F700
E700
D700
A700
F700
Time
[
Pr
. 10
] Operation
frequency
Time
[
Pr.12
]
Operation
voltage
voltage
[
Pr. 11
] Operation time
Output frequency (Hz)
DC injection
brake
A700
[
Pr. 12
OFF
ON
STF
ON
X13 signal
Output frequency
(Hz)
DC injection
brake
voltage]
ON
Time
Time
[When Pr. 11 = 8888]
A700
Summary of Contents for FR-A700 Series
Page 245: ...279 2 PARAMETER PARAMETER MEMO ...
Page 440: ...474 PARAMETER MEMO ...
Page 522: ...556 SELECTION MEMO ...
