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Specification of high-performance vector convertor
3.2.2 Instructions of peripheral electrical components
Figure 3-2 Instructions of peripheral electrical components
Part name
Air switch
Contactor
AC input reactor
EMC input filter
DC reactor
AC output reactor
Installing
Front of input circuit
Break power if any overcurrent of downstream equipment
Input side of air switch
Turn on/off power of convertor. Avoid frequent on/off operation of convertor
and convertor
through contactor (< twice every minute) or starting operation directly
Promote power factor on input side; eliminate higher harmonic on input
side and prevent device damage caused by voltage waveform distortion;
Input side of convertor
eliminate unbalanced input current caused by unbalance between power phase
Reduce external conduction and radiated interference of convertor; reduce
Input side of convertor
conduction interference from power end to convertor, promote antijamming
capability of convertor
Promote power factor on input side; enhance efficiency and heat stability of
convertor. Eliminate influence of higher harmonic on input side on convertor,
DC bus side of
reduce external conduction and radiated interference
convertor
Output side of convertor contains much higher harmonic. If motor is far away
Between output side of
from convertor, much distributed capacitance exists in circuit. Certain
convertor and motor.
harmonic may produce resonance in circuit, which will damage insulating
Install near frequency
property of motor and even motor, produce large leak current and cause
convertor
frequent protection of convertor. The distance between convertor and motor
generall exceeds 50m, suggest installing output AC reactor
Mechanical and electrical installation
for frequency
Functional description
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convertor
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