Part Name Mounting Location Function Description
AC input
reactor
side of the inverter
Improve the power factor of the input side; ●
Eliminate the higher harmonics of the input ●
side effectively and prevent other equipment
from damaging due to distortion of voltage
wave.
Eliminate the input current unbalance due to ●
unbalance between the power phases.
EMC Input
lter
I n p u t s i d e o f t h e
inverter
Reduce the external conduction and radiation ●
interference of the inverter.
Decrease the conduction interference owing ●
from the power end to the inverter and improve
the anti-interference capacity of the inverter.
DC reactor
MD series inverter
adopts DC reactor of
more than 7.5G as
standard.
Improve the power factor of the input side; ●
Improve the whole efficiency and thermal ●
stability of the inverter.
Eliminate the impact of higher harmonics of ●
the input side on the inverter and reduce the
external conduction and radiation interference.
AC output
reactor
Between the inverter
output side and the
motor. close to the
inverter
The inverter output side generally has higher
harmonics. When the motor is far from the inverter,
since there are many distributed capacitors in the
circuit, certain harmonics may cause resonance in
the circuit and bring about the following two impacts:
Degrade the motor insulation performance and ●
damage the motor for the long run.
Generate large leakage current and cause ●
frequent inverter protection.
In general, the distance between the inverter and
the motor exceeds 100 meters. Installation of output
AC reactor is recommended.
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