Omron SYSDRIVE 3G3MV A2002, User Manual

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2-35
Reactor Effects
Harmonics are effectively suppressed when the DC reactor is used with the AC reactor
as shown in the following table.
Harmonics
suppression
Harmonic generation rate (%)
Harmonics
suppression
method
5th
har-
monic
7th
har-
monic
11th
har-
monic
13th
har-
monic
17th
har-
monic
19th
har-
monic
23rd
har-
monic
25th
har-
monic
No reactor 65 41 8.5 7.7 4.3 3.1 2.6 1.8
AC reactor 38 14.5 7.4 3.4 3.2 1.9 1.7 1.3
DC reactor 30 13 8.4 5 4.7 3.2 3.0 2.2
DC and AC
reactors
28 9.1 7.2 4.1 3.2 2.4 1.6 1.4
H
Connecting the Braking Resistor and Braking Resistor Unit
When running a load with a large inertia or a vertical axis, regeneration energy will return
to the Inverter. If OV (overvoltage) is generated during deceleration, this indicates that
the regeneration energy is exceeding the capacity of the Inverter. In this case, use a
Braking Resistor or a Braking Resistor Unit.
·
Connect the Braking Resistor as shown in the following diagram.
Note 1. When using a Braking Resistor, install a thermal relay to monitor the tempera-
ture of the resistor.
Note 2. When using a Braking Resistor or a Braking Resistor Unit, be sure to include a
sequence whereby the power supply for the Inverter will be turned OFF in the
case of abnormal overheating. Not doing so may result in burning.
S
Braking Resistor: Use the output of the thermal relay used to monitor the tempera-
ture of the thermometer.
S
Braking Resistor Unit: Use the error contact output of the Braking Resistor Unit.
Design Chapter 2