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How to choose reactor for frequency converter?

2020-07-21

How to select the reactor for frequency converter? The following analysis is made from the selection of rated AC current, voltage drop, inductance, inductance of corresponding rated current and cable length。


OPE电竞竞猜娱乐1. Selection of rated AC current


The rated AC current is the long-term working current of the reactor designed from the aspect of heating, and sufficient high-order harmonic components should be considered at the same time. That is, the actual current flowing through the output reactor is the output current of the inverter motor load.


2. Voltage drop


The voltage drop refers to the actual voltage drop at both ends of the reactor coil corresponding to the actual rated current at 50 Hz. Generally, the voltage drop is about 4V ~ 8V.


3. Selection of inductance


OPE电竞竞猜娱乐The rated inductance of the reactor is also an important parameter! If the inductance is not selected properly, it will directly affect the change of voltage drop under the rated current and cause fault。 The inductance depends on the cross-sectional area of reactor core, the number of turns of coil and the adjustment of air gap。 The inductance of output reactor is determined according to the cable length within the rated frequency range, and then according to the actual rated current of the motor, the cross-sectional area of iron core and conductor under the corresponding inductance requirements can be selected to determine the actual voltage drop。


Special frequency converter


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