Motor Brake And Stop Operation; Dc Injection Brake (Pr. 10 To Pr. 12) - Mitsubishi Electric FR-E700 Series Instruction Manual

Motor brake and stop operation

6.9 Motor brake and stop operation
Purpose
Motor braking torque adjustment
Improve the motor braking torque with
an option
Coast the motor to a stop
Used to stop the motor with a mechani-
cal brake
(vibration restraint at stop-on-contact)
Used to stop the motor with a mechani-
cal brake (operation timing of a
mechanical brake)
6.9.1

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

The FR-E700SC 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 volt-
age 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.
Name
No.
DC injection brake
10
operation frequency
DC injection brake
11
operation time
FR-E720S-008SC to 015SC
DC injection brake FR-E720S-030SC to 110SC,
12
operation voltage FR-E740-016SC to 170SC
FR-E740-230SC and 300SC
The above parameters can be set when Pr. 160 "User group read selection" = 0.
6 - 98
Setting
Initial Value
Range
3Hz 0–120Hz
0
0.5s
0.1–10s
6%
4% 0–30%
2%
Parameters that must be set
DC injection brake
Selection of a regenerative brake
Selection of motor stopping method
Stop-on-contact control
Brake sequence function
Description
Set the operation frequency of the DC injec-
tion brake.
DC injection brake disabled
Set the operation time of the DC injection
brake.
Set the DC injection brake voltage (torque).
When "0" is set, DC injection brake is disa-
bled.
Parameter
Refer to
Section
Pr. 10–Pr. 12 6.9.1
Pr. 30, Pr. 70 6.9.2
Pr. 250 6.9.3
Pr. 6, Pr. 48, 6.9.4
Pr. 270, Pr. 275,
Pr. 276
Pr. 278–Pr. 283, 6.9.5
Pr. 292
Refer to
Parameters referred to
Section
13 Starting 6.7.2
frequency
71 Applied motor 6.8.2