Selection Of Dc Injection Brake And Regenerative Brake - Mitsubishi Electric FR-A700 Technical Manual

2.13 Selection of DC injection brake and
regenerative brake
2.13.1 DC injection brake [Pr. 10 to 12]
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.
[Pr. ] Name
DC injection brake
10
operation frequency
DC injection brake
11
operation time
DC injection brake
12
operation voltage
(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
A700 F700
motor.
DC injection
[Pr.12]
Operation
brake
voltage
voltage
Setting
Initial Value
Range
0 to 120Hz
3Hz
9999
0
0.5s
0.1 to 10s
8888
0.1K, 0.2K 6%
0.4K to 7.5K 4%
0 to 30%
11K to 55K 2%
75K or more 1%
, DC voltage applies to the
Time
Time
[Pr. 11] Operation time
common
(common)
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.
Description
Set the operation frequency of the DC
injection brake (zero speed control, servo
lock).
Operated at [Pr. 13] or less.
Without DC injection brake (zero speed
control, servo lock)
Set the operation time of the DC injection
brake (zero speed control, servo lock).
Operates when X13 signal is ON
Set the DC injection brake voltage (torque).
When 0 is set, DC injection brake is
disabled.
(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
A700
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)
[When Pr. 11 = 8888]
A700
[Pr. 12
DC injection
brake
voltage]
X13 signal
STF
328
PARAMETER
Available Inverters
A700
, turning ON the X13 signal when [Pr. 11 =
ON ON
ON
E700
F700
D700
—
— —
Time
Time
OFF