Motor Brake And Stop Operation; Dc Injection Brake (Pr. 10 To Pr. 12) - Mitsubishi Electric FR-F740 EC Instruction Manual

Motor brake and stop operation

6.8 Motor brake and stop operation
Purpose
Motor braking torque adjustment
Improve the motor braking torque
with an option
Performing operation by DC current
input
Coast the motor to a stop
6.8.1

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

The FR-F700 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.
Pr.
No. Name Initial Value
DC injection
10
brake operation 3Hz
frequency
DC injection
11
brake operation 0.5s
time
00170
or less
00250
DC injection
to
12
brake operation
01160
voltage
01800
or
more
The above parameters can be set when Pr. 160 = 0.
6 - 94
Parameters that must be set
DC injection brake
Selection of a regenerative brake
DC current feeding mode
Selection of motor stopping method
Output stop function
Setting
Description
Range
Set the operation frequency of the DC injection
0–120Hz
brake.
9999 Operated at Pr. 13 or less.
0 DC injection brake disabled
0.1–10s Set the operation time of the DC injection brake.
8888 Operate when X13 signal is on
4%
2% Set the DC injection brake voltage (torque). When
0–30%
"0" is set, DC injection brake is disabled.
1%
Parameter
Refer to
Section
Pr. 10–Pr. 12 6.8.1
Pr. 30, Pr. 70 6.8.2
Pr. 30 6.8.2
Pr. 250 6.8.3
Pr. 522 6.8.4
Refer to
Parameters referred to
Section
13 Starting 6.6.2
frequency
71 Applied motor 6.7.2