CN201167285Y

CN201167285Y - Magnetic coil component for an inversion output filter

Info

Publication number: CN201167285Y
Application number: CNU2008200830799U
Authority: CN
Inventors: 丁宏慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-30
Filing date: 2008-01-30
Publication date: 2008-12-17
Anticipated expiration: 2018-01-30

Abstract

A magnetic coil component for an inverter output filter comprises a winding wound outside an insulating skeleton and an iron core inserted inside the insulating skeleton, wherein the two ends of the winding are respectively connected with respect pins thereof, and the iron core is formed by laminating a plurality of small iron cores and air gap spacers arranged among the small iron cores. The winding has a multilayered structure formed by a multi-core enameled wire, and an insulating sleeve is arranged between each two layers. The multilayered structure of the winding is alternatively formed by winding a metal foil or thin sheet and an insulating film attached on the metal foil or thin sheet together. By using the structure, the lower height of the small iron cores can be utilized to reduce magnetic oscillation and reduce magnetic striction, so as to achieve the purpose of noise reduction. The air gap spacers among the small iron cores can be utilized to reduce iron core material consumption, reduce cost, ensure inductance, prevent magnetic saturation and facilitate heat radiation. The temperature increment and noise of the magnetic coil component provided in the utility model are both lower than those of the prior products with the same class, so as to the filter has improved electrical performance and more reliable and stable operation.

Description

A kind of magnetic coil assembly that is used on the inversion output filter

Technical field

The utility model relates to a kind of filter that reduces high order harmonic component in inversion, the frequency conversion system, specifically refers to the magnetic coil assembly on a kind of filter.

Background technology

At present, the filter that high-power series is exported in inversion has been widely used in the industries such as electric power, wind power generation, railway, shipbuilding, water conservancy, printing and dyeing, it is the main accessory in every profession and trade power inverter, the frequency conversion system, it is installed at the output of inversion, frequency conversion system, utilize the integrating effect of filter inductance that the waveform of system's output is filtered into the voltage waveform of near sinusoidal, relend and help the high frequency carrier that filter capacity is come filtering remnants, with the high order harmonic component in the elimination system, reduce the loss of cable, motor and transformer, improve the load capacity of system.

Usually, above-mentioned filter comprises three-phase core coil block, yoke, three-phase high-voltage electrodeless electric capacity and structure installed part, as Chinese patent Granted publication number for " the inversion output filter " of CN200959569Y just disclosed so a kind of structure, the three-phase core coil block of this filter is with the equidistant arrangement of identical air gap, and every phase magnetic core coil includes winding that is wound in outside the insulation framework and the iron core that is plugged in the insulation framework again; In order to increase magnetic resistance, connecting plate also is installed simultaneously in both sides unshakable in one's determination.During assembling, upper magnet yoke falls between the upper end of each phase magnetic core coil assembly two connecting plate, and lower yoke falls between the lower end of each phase magnetic core coil assembly two connecting plate, make upper and lower yoke respectively with each mutually the iron core in the magnetic core coil assembly form magnetic loop, upper and lower yoke more respectively the clamping plate by separately, bolt, nut with each mutually the magnetic core coil assembly be fixed into one.During use, this filter string is contained between inverter and the load, can make the SPWM waveform of carrier frequency 1KHz～16KHz, the fundamental frequency 50Hz of inverter filter into the voltage waveform of near sinusoidal 50Hz, and voltage THD (harmonic content) value of output is lower than 5%.

But find in the actual use of above-mentioned wave filter: the noise of each phase magnetic core coil assembly is bigger than normal, temperature rise is also higher, thereby has influenced the reliability of filter work to a certain extent, so its electric property still awaits further improvement.

Summary of the invention

Technical problem to be solved in the utility model is at the prior art present situation, provides a kind of temperature rise low, and noise is little is used for magnetic coil assembly on the inversion output filter

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this magnetic coil assembly that is used on the inversion output filter includes winding that is wound in outside the insulation framework and the iron core that is plugged in the insulation framework, wherein the winding two ends are connected with separately pin respectively, described both sides unshakable in one's determination and and insulation framework between also be fitted with connecting plate respectively, and the two ends of each connecting plate expose to described insulation framework respectively, it is characterized in that: described iron core is formed by stacking by a plurality of little iron cores and the air gap gasket that is sandwiched between each little iron core.

Preferably, between above-mentioned each connecting plate both sides and insulation framework, can be plugged with the insulation strip that the cross section is the L type respectively, make thus between insulation framework and the iron core and produce the gap, help inner heat and distribute.In this scheme,, be preferably between every adjacent above-mentioned insulation strip and be provided with the insulation lattice framing that distributes in the same way with insulation strip in order to guarantee the supporting dynamics between the adjacent insulation strip.

As further improvement of the utility model, the sandwich construction that described winding can be formed by the coiling of multicore enamelled wire, and between every layer, be equipped with insulating case, like this under equal line footpath, make the surface area of enamelled wire bigger, promptly increase area of dissipation significantly, the heat that winding produces under the high-frequency current is in time distributed by its surface.The insulating case of setting up simultaneously, the heat that more helps between layer and the layer distributes.Certainly, above-mentioned winding also can be by tinsel or thin plate and the sandwich construction that is wound into together attached to the insulation book film on tinsel or the thin plate, as a same reason, utilize the large surface area of tinsel or sheet metal, increased the contact area of winding and air, the heat that winding is produced is distributed fast, with the temperature rise of further reduction product, has guaranteed the insulation property between layer and the layer simultaneously again.

Compared with prior art, because the utility model is designed to overlaying structure by the air gap gasket between a plurality of little iron cores and each the little iron core with original integral type iron core, thereby under the operating mode of high frequency, high pressure, big electric current, can utilize the lower height of each little iron core, reduce the vibration of magnetic unit, reduce the flexible of mangneto, thereby reach the purpose of noise reduction; Simultaneously by means of the air gap gasket between each little iron core, both can reduce core material, reduce manufacturing cost, can guarantee inductance again, prevent magnetic saturation, also help heat radiation, reduce temperature rise, find in reality trial-production, noise of the present utility model, temperature rise are hanged down 10-15dB, 10-15K than the like product of ad eundem respectively, thereby the utility model can effectively improve the electric property of filter, make its work more increase by, stable.

Description of drawings

Fig. 1 is assembled into stereogram behind the filter with the utility model first embodiment;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is that A-A among Fig. 2 is to profile;

Fig. 4 is the enlarged drawing of I part among Fig. 3;

Fig. 5 is the enlarged drawing of II part among Fig. 3;

Fig. 6 is the three-dimensional exploded view of the utility model first embodiment;

Fig. 7 is the electrical connection diagram after the utility model first embodiment is assembled into filter;

Fig. 8 is assembled into profile behind the filter with the utility model second embodiment.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment one: extremely shown in Figure 6 as Fig. 1, the inversion output filter that this magnetic coil component groups is dressed up, at this moment, the magnetic coil assembly has three, upright at interval successively the distribution, each magnetic coil assembly 1 comprises and is wound in the outer winding 11 (being the label L among Fig. 7) of insulation framework (not shown) and is plugged on the interior iron core of insulation framework, wherein, unshakable in one's determination be formed by stacking by three shapes identical little unshakable in one's determination 12 and the air gap gasket 13 that is sandwiched between each little iron core, see also Fig. 3 and Fig. 6, each little unshakable in one's determination 12 silicon steel sheet by designing requirement is spliced to form; Certainly, as required, the height of each little iron core can be designed to structure inequality.Both sides unshakable in one's determination also are fitted with the connecting plate 14 that is sandwiched between iron core and the insulation framework, and the two ends of each connecting plate 14 expose to insulation framework respectively; Described winding 11 is then by aluminium alloy paillon foil 111 be attached to the sandwich construction that the insulation book film 112 on this aluminium alloy paillon foil is wound into together, and weld mutually with separately pin 15 respectively at the two ends of winding, sees also Fig. 4.

In order to have better radiating effect, in the present embodiment, be plugged with the insulation strip 16 that the cross section is the L type between each connecting plate both sides and the insulation framework respectively; Between adjacent above-mentioned insulation strip, also be provided with simultaneously the insulation lattice framing 17 that distributes in the same way with insulation strip.

During installation, the upper magnet yoke 2 that is assembled into silicon steel sheet 21 falls between the upper end of each phase magnetic core coil assembly two connecting plate, and is provided with air gap gasket between upper magnet yoke and relative little iron core, to increase magnetic resistance, prevents that the extreme prematurity magnetisation is saturated; 3 of lower yokes that constitute with silicon steel sheet drop between the lower end of each phase magnetic core coil assembly two connecting plate, and are provided with air gap gasket equally between lower yoke and corresponding little iron core.At this moment, upper and lower yoke respectively with each mutually the iron core in the magnetic core coil assembly form magnetic loop, upper magnet yoke 2 again by two train wheel bridges 4, bolt, nut, pad with each mutually the magnetic core coil assembly be fixed into one; 3 of lower yokes by two lower plates 5, bolt, nut, pad with each mutually the magnetic core coil assembly be fixed into one, and on lower plate, have installing hole 51, be fixed in the required system by this installing hole.For the ease of three-phase high-voltage electrodeless electric capacity 6 (they being the label C among Fig. 7) are installed, between upper and lower clamping plate, set up a mounting panel 7, and three-phase high-voltage electrodeless electric capacity 6 is fixed on the mounting panel 7 with the distribution mode of upper, middle and lower successively, sees also Fig. 1 and Fig. 2.Every phase high pressure electrodeless electric capacity 6 two ends are connected on the output of above-mentioned corresponding phase winding by lead respectively again, to form three-phase (label W1, V1, U1 and W2, V2, U2 among Fig. 7 represent three-phase input end and output respectively) electrical connection diagram as shown in Figure 7.

Embodiment two: as shown in Figure 8, itself and the above-mentioned first embodiment difference are: winding is by multicore enamelled wire 8 coiling side by side, and individual layer adds insulating case 9 and continues coilings, till the design number of turn after expiring.That is to say that winding is the sandwich construction that is turned to by multicore enamelled wire 8, and between every layer, be equipped with insulating case 9 that such structure can reach the purpose that reduces temperature rise equally.

Claims

1, a kind of magnetic coil assembly that is used on the inversion output filter, include and be wound in the outer winding (11) of insulation framework and be plugged on the interior iron core of insulation framework, wherein winding (11) two ends are connected with separately pin (15) respectively, described both sides unshakable in one's determination and and insulation framework between also be fitted with connecting plate (14) respectively, and the two ends of each connecting plate expose to described insulation framework respectively, it is characterized in that: described iron core is formed by stacking by a plurality of little iron cores (12) and the air gap gasket (13) that is sandwiched between each little iron core.

2, the magnetic coil assembly that is used on the inversion output filter according to claim 1 is characterized in that: also be plugged with the insulation strip (16) that the cross section is the L type between described each connecting plate (14) both sides and the described insulation framework respectively.

3, the magnetic coil assembly that is used on the inversion output filter according to claim 2 is characterized in that: also be provided with the insulation lattice framing (17) that distributes in the same way with described insulation strip between adjacent above-mentioned insulation strip.

4, according to claim 1 or the 2 or 3 described magnetic coil assemblies that are used on the inversion output filter, it is characterized in that: the sandwich construction that described winding is formed by multicore enamelled wire (8) coiling, and between every layer, be equipped with insulating case (9).

5, according to claim 1 or the 2 or 3 described magnetic coil assemblies that are used on the inversion output filter, it is characterized in that: described winding is by tinsel (111) or thin plate and be attached to the sandwich construction that the insulation book film (112) on this tinsel or the thin plate is reeled and formed together.