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Dc Injection Brake - Mitsubishi Electric FR-CS84-012 Instruction Manual

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5.12.5 DC injection brake

• Adjust the braking torque and timing to stop the motor using the DC injection brake.
By the DC injection brake operation, DC voltage is applied to the motor to prevent rotation of the motor shaft. When a motor
shaft is rotated by external force, the motor shaft does not go back to the original position.
Pr.
Name
10
DC injection brake
G100
operation frequency
11
DC injection brake
G101
operation time
12
DC injection brake
G110
operation voltage
 Setting of operating frequency (Pr.10)
• Set the operation frequency for the DC injection brake in
injection brake when the output frequency decelerates to the set frequency.
• The DC injection brake operation frequency depends on the stopping method.
Stopping method
Press the STOP key on the PU.
Turn OFF the STF/STR signal.
Set frequency to 0 Hz
 Operation time setting (Pr.11)
• Set the operation time for the DC injection brake to
• When the motor does not stop due to large load moment (J), increase the setting to ensure the effect.
• The DC injection brake operation is not available when "0" is set in
 Setting of operation voltage (torque) (Pr.12)
• Set the percentage against the power supply voltage in
• The DC injection brake operation is not available when "0" is set in
NOTE
• Even if a larger value is set in Pr.12, braking torque is limited so the output current will be within the rated current of the inverter.
CAUTION
• Install a mechanical brake to make an emergency stop or to stay stopped for a long time.
Parameters referred to
page 99
Pr.13 Starting frequency
Pr.71 Applied motor
page 147
page 147
Pr.80 Motor capacity
Initial value
Setting range
3 Hz
0 to 120 Hz
0
0.5 s
0.1 to 10 s
4%
0 to 30%
Parameter setting
0.5 Hz or higher in Pr.10.
Lower than 0.5 Hz in Pr.10, and 0.5 Hz or
higher in Pr.13.
Lower than 0.5 Hz in both Pr.10 and Pr.13.
Pr.11 DC injection brake operation time
Pr.12 DC injection brake operation voltage
Description
Set the operation frequency for the DC injection brake.
Without DC injection brake.
Set the operation time for the DC injection brake.
Set the DC injection brake voltage (torque). When set to "0", the DC
injection brake is not applied.
Pr.10 DC injection brake operation frequency
DC injection brake operation frequency
Pr.10 setting.
0.5 Hz.
Pr.10 or Pr.13 setting, whichever is higher.
Pr.13 setting or 0.5 Hz, whichever is lower.
. (The motor will coast to stop.)
Pr.11
. (The motor will coast to stop.)
Pr.12
to operate the DC
.
.
5. PARAMETERS
5.12 (G) Control parameters
2
2
3
4
5
6
7
8
9
10
197

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