A kind of many magnetic gaps filter reactor
Technical field
The present invention relates to a kind of a kind of many magnetic gaps filter reactor for intermediate frequency power supply, belong to reactor and make the field.
Background technology
CN2508360Y, title " iron core filter reactor ", it is made up of iron core and coil.Iron core is by upper and lower iron core and place the iron core column between upper and lower iron core to form.The coil cover is characterized in that the iron core column adopts the folded system of segmentation layer by layer on the iron core column, isolate with insulating material between every section, makes bed course air gap and the core section of iron core obtain best fit, and the linearity of iron core is risen, and loss is reduced greatly; Coil adopts the copper strips coiling, makes the kelvin effect of conductor reduce greatly, and turn-to-turn and interlayer distributed capacitance reduce greatly, thereby the equivalent AC resistance of reactor is descended, and has improved the quality factor of reactor.Its weak point: this iron core filter reactor is mainly used in suppressing mains by harmonics, is not suitable for the dc pulse filtering of intermediate frequency power supply.
Existing intermediate frequency power supply DC filtering circuit, born by traditional reactor always, on structural design, the iron core that is built up by stripe shape and U-shaped silicon steel sheet always, be used for magnetic conduction, two groups of coils of the both sides overcoat of U-shaped iron core are equipped with the size that backing plate is used for regulating air gap between vertical bar and U-shaped iron core end face, prevent magnetic saturation.Its weak point: volume is big, and coil is difficult to be arranged, is easy to magnetic saturation, is only applicable to the filtering of middle-size and small-size power supply.
Summary of the invention
Purpose of design: avoid the weak point in the background technology, design a kind of a kind of many magnetic gaps filter reactor of the dc pulse filtering for intermediate frequency power supply.
Design: high-power intermediate frequency power supply, also claim variable frequency power supply, it is the corollary apparatus of induction heating melting, its function is the alternating current that the three-phase 50HZ alternating current of electrical network is converted into intermediate frequency by " rectification-filtering-inversion ", be added on the coil of induction furnace, utilize electromagnetic induction principle that metal is heated and melting, the filter circuit of the intermediate frequency power supply in its parallel line partly is to be finished by flat ripple (filtering) reactor, main effect is carried out flat ripple to the 300HZ dc pulse electric current of AC-DC, be added to inverter circuit then, for inverter circuit provides a constant current source.
The present invention on structural design, U-shaped iron core constituted by lower core and the multi-thread bag reactor of the many magnetic gaps of multistage column and the iron core of the multi-thread bag reactor of the many magnetic gaps of multistage column on overlapped coil respectively design, be major technique feature of the present invention.The purpose of doing like this is: because a reactor has a plurality of magnetic gaps and a plurality of coil bag and multistage iron core to combine, it can take full advantage of the electromagnetism principle of stacking, under the situation that does not increase reactor volume and iron core, reactor is operated under bigger electric current, the better filter state, basically eliminated magnetic saturation, solved background technology and wanted for a long time to solve, but the technical barrier that never solves.
Technical scheme: a kind of many magnetic gaps filter reactor, it comprises reactor, described reactor is made of upper and lower iron core and the multi-thread bag reactor of the many magnetic gaps of the multistage column that is positioned between upper and lower iron core, is with the coil bag on the every iron leg core in the multi-thread bag reactor of the many magnetic gaps of the multistage column.
The present invention compares with background technology, and the one, volume is little, be difficult for heating, be difficult to magnetic saturation; The 2nd, have that winding volume is little, inductance value is big, ampacity is big, dielectric strength good; The 3rd, manufacturing process is simple, cost is low.
Description of drawings
Fig. 1 is the decomposition texture schematic diagram of many magnetic gaps filter reactor.
Embodiment
Embodiment 1: with reference to accompanying drawing 1.A kind of many magnetic gaps filter reactor, it comprises reactor, described reactor is made of upper and lower iron core 1 and the multi-thread bag reactor of the many magnetic gaps of the multistage column 3 that is positioned at 1 of upper and lower iron core, be with coil bag 4 on every iron leg core in the multi-thread bag reactor of the many magnetic gaps of the multistage column 3, each coil bag 4 wiring according to a conventional method respectively and connect.The multi-thread bag reactor of the many magnetic gaps of described multistage column 3 namely all is equipped with cushion block (plate) by polylith iron core and polylith cushion block (plate) 2 staggered folded being configured between described iron core and the iron core, the cushion block (plate) 2 between its described iron core and iron core is magnetic gap (air gap).Be with coil bag 4 on the polylith iron core respectively, described coil bag 4 is copper pipe coiling line bag and passes through the cool cycles water cooling.Described upper and lower iron core 1 is provided with fixed screw frame 5 and upper and lower iron core 1 and the multi-thread bag reactor of the many magnetic gaps of multistage column 3 is solidified as a whole.The multi-thread bag reactor of the many magnetic gaps of described multistage column 3 constitutes frame structure with upper and lower iron, and its manufacture craft is prior art, is not described herein at this.
What need understand is: though above-described embodiment is to the mentality of designing of the present invention detailed text description of contrasting; but these text descriptions; just the simple text of mentality of designing of the present invention is described; rather than to the restriction of mentality of designing of the present invention; any combination, increase or modification that does not exceed mentality of designing of the present invention all falls within the scope of protection of the present invention.