112
Motor brake and stop operation
4.9 Motor brake and stop operation
4.9.1 DC injection brake (Pr. 10 to Pr. 12)
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 190)
Purpose Parameter that must be set Refer to Page
Motor braking torque adjustment DC injection brake Pr. 10 to Pr. 12 112
Improve the motor braking torque with an
option Selection of a regenerative brake Pr. 30, Pr. 70 114
Performing operation by DC current input DC current feeding mode Pr. 30 114
Coast the motor to a stop Selection of motor stopping method Pr. 250 119
Output stop function Pr. 522 120
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
Number Name Initial Value
200V class (400V class)
Setting
Range Description
10 DC injection brake
operation frequency 3Hz 0 to 120Hz Set the operation frequency of the DC injection
brake.
9999 Operated at Pr. 13 or less.
11 DC injection brake
operation time 0.5s
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
12 DC injection brake
operation voltage
00340 (00170) or
less 4%
0 to 30% Set the DC injection brake voltage (torque). When
"0" is set, DC injection brake is disabled.
00490 to 02330
(00250 to 01160) 2%
03160 (01800) or
more 1%
When Pr. 11="0.1 to 10s"
When Pr. 11="8888"
(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)
⋅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.)
⋅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 122.)
⋅When the motor does not stop due to large load moment (J), increasing
the setting produces an effect.
Time
Pr. 10 Operation
frequency
Time
Pr.12
Operation
voltage
voltage
Pr. 11 Operation time
Output frequency (Hz)
DC injection
brake
X13 signal ON OFF
Time
Time
Pr.12
Operation
voltage
voltage
Output frequency (Hz)
DC injection
brake