Technical requirements for large-capacity filter reactors for induction melting furnaces
Induction melting furnace filtered Reactor solid power is very important, it has two functions. First, the output current of the rectifier is made smooth and stable. Second, when the inverter thyristor is short-circuited, the growth rate of the short-circuit current and the maximum short-circuit current are limited. If the parameter design of the filter reactor is unreasonable, the core material is not good or the manufacturing process is not good, which will have a great impact on the reliability of the solid power supply.
To ensure reasonable parameters filter reactor, specially developed filter reactor design software package, the software design, especially considering the filter reactor working environment Parallel Inverter conditions, and in accordance with our production of solid power more than ten years Prepared by experience. It can fully optimize the parameters of the filter reactor. In particular, it can analyze the parameter variation of the filter reactor in the current range from 0 to 3 times the rated current, ensuring that the core will not pass when the current of the filter reactor is 3 times the rated current. Magnetic saturation. Because, when the induction melting furnace inverts the thyristor through-short, the current through the filter reactor is much larger than the rated current. At this time, if the core of the filter reactor is magnetically saturated, the filter reactor will lose the current limiting effect. Therefore, it must be ensured that the filter reactor core is not magnetically saturated when the current is greater than the rated current. Only in this way, the filter reactor has a good current limiting function, ensuring that the maximum short-circuit current is limited to a reasonable range.
Filtered Reactor uses a cold-rolled silicon steel of high magnetic permeability products, extruded brass is T2 brass, high-strength mica tape wrap, H grade insulation.
As a filter to reduce the operating noise of the reactor, silicon taken special fastening process, the air gap between the silicon and the buffer is also filled with a special sound-absorbing material.
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