Powtran PI9100 Series Manual page 123

Chapter 5 Function parameter
reference frequency of 10.00Hz.
Start DC braking
F3.05
current/pre-excitation
current
Start DC braking
F3.06
time/pre-excitation time
Start DC braking, generally is used to stop and then restart the motor. Pre-excitation is
used to create magnetic field for asynchronous motor and then start the motor to improve the
response speed.
Start DC braking is only active when the start mode is the direct startup. The inverter
firstly performs DC braking at the set start DC braking current, after the start DC braking
time is passed, and then start running. If the DC braking time is set to 0, the inverter will
directly start and neglect DC braking. The larger DC braking current, the greater braking
force.
If the startup mode is the asynchronous motor pre-excitation start, the inverter firstly
creates magnetic field at the preset pre-excitation current, after the set pre-excitation time is
passed and then start running. If the pre-excitation time is set to 0, the inverter will directly
start and neglect pre-excitation.
Start DC braking current/pre-excitation current is the percentage of inverter rater current.
F3.07
Stop mode
When the inverter receives the "stop" command, the inverter will set up the motor stop
mode according to the parameter.
0: Deceleration parking mode
The inverter will decelerates to the lowest frequency until stop according to the set
deceleration time and mode.
1: Free stop mode
When the inverter receives the "stop" command, it immediately stops output and the
motor freely run until stop under the action of inertia.
Initial frequency of stop
F3.08
DC braking
Waiting time of stop DC
F3.09
braking
F3.10
Stop DC braking current
F3.11
Stop DC braking time
Initial frequency of stop DC braking: if the operating frequency is reduced to the initial
frequency when decelerating, DC braking process is started.
Waiting time of stop DC braking: if the operating frequency is reduced to the said initial
frequency, the inverter firstly stops output for some time, and then DC braking process is
started. In order to prevent overcurrent fault that DC braking may cause at the higher speeds.
Stop DC braking current: it indicates the percentage of the DC braking output current in
the rated motor current. The larger this value, the stronger the DC braking effect, but the
greater the heat of the motor and the inverter.
Stop DC braking time: If this value is 0, DC braking process is canceled. Please see the
schematic diagram for the DC braking process.
0% to 100%
0.0s to 100.0s
Deceleration parking
Free stop
0.00Hz to F0.19 (maximum
frequency)
0.0s to 100.0s
0% to 100%
0.0s to 100.0s
118
0%
0.0s
0
0
1
0.00Hz
0.0s
0%
0.0s
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