110
Motor brake and stop operation
4.10 Motor brake and stop operation
4.10.1 DC injection brake and pre-excitation (Pr. 10, Pr. 11, Pr. 795)
The above parameters can be set when
Pr. 160 Extended function display selection
= "0".
The value left of the slash is for the 2.2K drive unit or lower. The one right of the slash is for the 3.7K drive unit.
If a value exceeding the upper speed limit of the motor is set, the actual operation will be limited at the maximum rotation speed. The setting range is for the
S-PM motor. The maximum setting value differs depending on the number of poles of the applied motor.
(1) Coasting speed setting
(Pr. 10)
When the speed at which coasting starts is set in
Pr. 10
, output is shutoff when this speed is reached during deceleration
and motor starts coasting. (This function is valid when
Pr. 11
= "0s")
When
Pr. 11
"0",
Pr. 10
is always set to 0r/min.
(2) Operation time setting
(Pr. 11)
In
Pr. 11
, set the time of the DC injection brake.
When
Pr.
11
= "0", the DC injection brake is disabled. (At a stop, the motor coasts.)
When the motor does not stop due to large load moment (J), increasing the setting produces an effect.
(3) Setting the torque generated during DC injection brake operation
(Pr. 795)
In
Pr. 795
, set the maximum torque to be generated during DC injection brake operation (pre-excitation operation).
A setting value larger than 50% may cause a motor overload trip (E.THM) depending on the DC injection brake time (pre-
excitation operation time).
Purpose
Parameter that should be Set
Refer to Page
Motor braking torque adjustment
DC injection brake and
pre-excitation
Pr. 10, Pr. 11, Pr. 795
Improve the motor braking torque with
an option
Selection of a
regenerative brake
Pr. 30, Pr. 70
Coast the motor to a stop
Selection of motor
stopping method
Pr. 250
Activate the electromagnetic
brake by the output signal
Brake opening request
signal
Pr. 281, Pr. 283
Electromagnetic brake
interlock
Pr. 736
At a motor stop, DC injection brake operates to apply braking torque to the motor.
Parameter
Number
Name
Initial
Value
Setting Range
Description
10
Coasting speed
90r/min
0 to 3600r/min /
0 to 2400r/min
The speed where the motor starts coasting
11
DC injection brake operation
time
0.5s
0
DC injection brake disabled
0.1 to 10s
Operation time of the DC injection brake.
795
DC brake torque boost
9999
0 to 150%
The maximum torque to be generated during
DC injection brake operation (pre-excitation
operation)
9999
50% setting
(r/min)
(r/min)
Pr. 11
Operation time
DC injection brake
is exercised at 0r/min.
Rotation
speed
Rotation
speed
Time
Time
DC injection
brake
DC injection
brake
Operation example when DC injection
brake is exercised (
Pr. 11
0)
Motor coasting
Time
Time
Operation example when DC injection
brake is not exercised (
Pr. 11
= 0)
Pr. 10
Coasting speed time
Содержание FR-D720-0.2K-G
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Страница 294: ...291 APPENDIX This chapter provides the APPENDIX of this product Always read the instructions before using the equipment ...