Delta Electronics VFD037CH23A-21 — применение реакторов переменного тока для защиты двигателей [77/638]

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Delta Electronics VFD037CH23A-21 [77/638] Applications of line load ac reactors chokes
Chapter 7 Optional Accessories
7-7
Applications of Line & Load AC Reactors (Chokes)
Connected in input circuit
Application 1
When more than one AC motor drive is connected to the same mains power and one of them
is ON during operation.
Problem: When applying power to one of the AC motor drive, the charge current of the
capacitors may cause voltage dip. The AC motor drive may be damaged when over
current occurs during operation.
Correct wiring:
M1
M2
Mn
reactor
AC motor drive
AC motor drive
AC motor drive
motor
motor
motor
Application 2
Silicon rectifier and AC motor drive are connected to the same power.
Problem: Switching spikes will be generated when the silicon rectifier switches ON/OFF.
These spikes may damage the mains circuit.
Correct wiring:
DC
power
reactor
reactor
AC motor drive
motor
silicon rectifier
Application 3
When the power supply capacity exceeds 10 times of the inverter capacity.
Problem: When the mains power capacity is too large, line impedance will be small and the
charge current will be too high. This may damage AC motor drive due to higher
rectifier temperature.
Correct wiring
large-capacity
power
reactor
small-capacity
AC motor drive
motor

Содержание

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Изучите, как использовать реакторы переменного тока для защиты AC двигателей от перепадов напряжения и повреждений. Узнайте о правильной проводке и решениях для различных приложений.