Using Highslip Braking - Omron I537-E2-01 User Manual

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Using Highslip braking

When the system is operating, the Inverter is delivering an amount of electrical energy to the motor, this
energy is transformed into mechanical and thermal energy.
As a generator, the motor efficiency is still high. Most of the energy returns to the Inverter as current flow.
This regenerated current is stored in the DC bus capacitors, increasing the DC bus voltage. If the regenerated
energy is bigger than the Inverter losses (10% or less) the DC bus will increase to a level where the braking
resistor starts working. If no braking resistor is installed the DC voltage will increase up to a level where the
Inverter operation will be stopped and an overvoltage (OV) is shown.
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Related parameters
Param-
eter-
Number
High-slip brak-
ing decelera-
tion frequency
n3-01
HSB Decel
High-slip brak-
ing current
n3-02
HSB Current
High-slip brak-
ing stop dwell
n3-03
HSB Dwel-
High-slip brak-
ing OL time
n3-04
HSB Ol Time
Terminal sel
H1-01
-
H1-05 Terminal sel
-14
6
Name
Description
LCD
Display
Sets the frequency width for
deceleration during high-slip
width
braking in percent, taking the
Maximum Frequency (E1-04) as
Width
100%.
Sets the current limit for decelera-
tion during high-slip braking in
limit
percent, taking the motor rated
current as 100%. The resulting
limit must be 150% of the Inverter
Ref
rated current or less.
Sets the dwell time for the output
time
frequency for FMIN (1.5 Hz) dur-
ing V/f control.
Effective only during deceleration
for high-slip braking.
Tim@Stp
Set the OL time when the output
frequency does not change for
some reason during deceleration
for high-slip braking.
S3-S7
Multifunction Digital Inputs
S3-S7
Change
Setting Factory during Access
Range Setting Opera- Level
tion
1 to 20 5% No A
100 to
150% No A
200
0.0 to
1.0 s No A
10.0
30 to
40 s No A
1200
0 to 77 No A
RS-422A/
485
Register
588H
589H
58AH
58BH
400H
to
404H