Motor Brake And Stop Operation; Dc Injection Brake (Pr. 10 To Pr. 12) - Mitsubishi Electric FR-F720-00046 Instruction Manual

Motor brake and stop operation

4.9 Motor brake and stop operation

Purpose
Motor braking torque adjustment
Improve the motor braking torque with an
option
Performing operation by DC current input DC current feeding mode
Coast the motor to a stop
4.9.1

DC injection brake (Pr. 10 to Pr. 12)

The DC injection brake can be operated at a motor stop to adjust the stop timing and braking torque.
In DC injection brake operation, DC voltage is directly applied to the motor to prevent the motor shaft from
rotating when a motor decelerates to stop.
The motor will not return to the original position if the motor shaft rotates due to external force.
Parameter
Name
Number
DC injection brake
10
operation frequency
DC injection brake
11
operation time
DC injection brake
12
operation voltage
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 179)
When Pr. 11="0.1 to 10s"
Pr.12
DC injection
Operation
brake
voltage
voltage
Pr. 11 Operation time
When Pr. 11="8888"
Pr.12
DC injection
Operation
brake
voltage
voltage
X13 signal
106
DC injection brake
Selection of a regenerative brake
Selection of motor stopping method
Output stop function
Initial Value
200V class (400V class)
3Hz
0.5s
00340 (00170) or
less
00490 to 02330
(00250 to 01160)
03160 (01800) or
more
(1) Operation frequency setting (Pr. 10)
⋅
When the frequency at which the DC injection brake will be operated is set
to Pr. 10, the DC voltage is applied to the motor upon reaching to the set
frequency during deceleration.
⋅ At the Pr. 10 setting of "9999", the DC injection brake is operated when
deceleration is made to the frequency set in Pr. 13 Starting frequency.
(2) Operation time setting (Pr. 11)
Time
⋅ In Pr. 11, set the time of the DC injection brake.
⋅ When Pr. 11 = "0s", the DC injection brake is disabled. (At a stop, the
motor coasts.)
Time
⋅ When Pr. 11="8888", the DC injection brake is applied while X13 signal
is on.
⋅ For the terminal used for X13 signal input, set "13" in any of Pr. 178 to Pr.
189 to assign the function. (Refer to page 116.)
⋅ When the motor does not stop due to large load moment (J), increasing
the setting produces an effect.
Time
Time
ON OFF
Parameter that must be set
Setting
Range
Set the operation frequency of the DC injection
0 to 120Hz
brake.
9999 Operated at Pr. 13 or less.
0 DC injection brake disabled
0.1 to 10s Set the operation time of the DC injection brake.
8888 Operate when X13 signal is on
4%
Set the DC injection brake voltage (torque). When
2%
0 to 30%
"0" is set, DC injection brake is disabled.
1%
Refer to Page
Pr. 10 to Pr. 12
Pr. 30, Pr. 70
Pr. 30
Pr. 250
Pr. 522
Description
106
108
108
113
114