CN202957124U

CN202957124U - Joint iron core type three-phase electric reactor

Info

Publication number: CN202957124U
Application number: CN 201220668471
Authority: CN
Inventors: 王建刚; 马学芳
Original assignee: Qingdao Yunlu Energy Technology Co Ltd
Current assignee: Qingdao Yunlu Energy Technology Co Ltd
Priority date: 2012-12-07
Filing date: 2012-12-07
Publication date: 2013-05-29
Anticipated expiration: 2022-12-07

Abstract

The utility model relates to a joint iron core type three-phase electric reactor used for a current transformer or an inversion cabinet of a power system. Compared with original two separate three-phase electric reactors, the joint iron core type three-phase electric reactor provided by the utility model is smaller in size, lower in cost, higher in efficiency and more convenient to mount. The joint iron core type three-phase electric reactor comprises upper and lower three-phase electric reactors, wherein each of the upper and lower three-phase electric reactors comprises a coil; the upper and lower three-phase electric reactors have different inductance values; the coils of the upper and lower three-phase electric reactors are connected in series, and the exciting directions of the coils on a core limb are consistent; meanwhile, a lower yoke of the upper electric reactor and an upper yoke of the lower electric reactor share one yoke; when the two three-phase electric reactors work simultaneously, magnetic fluxes generated in the shared yoke counteract mutually due to different directions, an actual magnetic flux in the shared yoke is approximately a difference between independent magnetic fluxes of the two electric reactors; as the upper and lower three-phase electric reactors are directly connected in series, a copper bar for connecting the two electric reactors is omitted, and the cost is low; and the three-phase electric reactor is convenient to mount by a user and occupies a small space.

Description

Associating iron core type three-phase reactor

Technical field:

The utility model relates to the associating iron core type three-phase reactor of a kind of current transformer for electric power system or inverter cabinet.

Technical background:

In the current transformer or inverter cabinet of electric power system, current signal is while exchanging by DC inversion, can produce a large amount of harmonic waves, can not direct grid-connected or connect power consumption equipment, must increase reactor and electric capacity carries out the filtering processing.Existing filtering modes that adopt LCL in industry more, i.e. the filtering mode of inductance L 1+ capacitor C+inductance L 2, the L1 inductance value is larger, and the L2 inductance value is less, to reduce harmonic content, reaches grid-connected requirement or power consumption equipment instructions for use.

Traditional design, directly to make the three-phase reactor of two platform independent, by external mounting, be combined into the filtering mode of LCL again, the materials'use of this scheme reactor itself is more, volume is larger, cost is higher, and the client is while installing, the operation more complicated, need larger space to place reactor simultaneously, also increased cost.

Summary of the invention:

Technical problem to be solved in the utility model is: a kind of associating iron core type three-phase reactor is provided, and with respect to two three-phase reactors independently originally, volume is less, cost is lower, efficiency is higher, it is more convenient to install.

Main technical schemes of the present utility model is: comprise, lower two three-phase reactors, on, lower two three-phase reactors comprise coil, on, the inductance value difference of lower two three-phase reactors, on, the coil series connection of lower two three-phase reactors, and excitatory direction is consistent on iron core column, simultaneously, the upper yoke of the lower yoke of reactor and following reactor shares an iron yoke, when two three-phase reactors are worked simultaneously, the magnetic flux produced in sharing the iron yoke is cancelled out each other because direction is different, share actual magnetic flux in the iron yoke and be about the poor of two reactor independence magnetic flux.

Compared with prior art, major advantage of the present utility model is:

1, use the associating iron core, saved an iron leg yoke, and also saved one group of iron yoke immobilization material and one group of submount material, reduce and use material, cost is lower, and volume is less;

2, use the associating iron core, saved an iron leg yoke, and shared iron yoke offset a part because of magnetic flux, thereby magnetic flux density is less, core loss is less, and reactor efficiency is higher;

3, upper and lower reactor is directly connected, and has saved two copper bars that reactor connects, and cost is lower;

4, client's installation is more convenient, takes up room less.

The accompanying drawing explanation:

Fig. 1: front view of the present utility model;

Fig. 2: left view of the present utility model;

Fig. 3: schematic diagram of the present utility model.

Accompanying drawing identifier declaration: 1-upper yoke; 2-shares the iron yoke; The 3-lower yoke; The 4-base; The fixing folder of using of 5-lower yoke; 6-shares the fixing folder of using of iron yoke; The fixing folder of using of 7-upper yoke; The upper coil of 8-; The 9-lower coil; 10-upper core post; 11-lower core post; The 12-air gap; The coiling of A1/B1/C1-lower coil finishes terminal; The initial terminal of the coiling of A2/B2/C2-lower coil; The coiling of the upper coil of A3/B3/C3-finishes terminal; The initial terminal of the coiling of the upper coil of A4/B4/C4-.

Embodiment:

Below in conjunction with accompanying drawing, enforcement of the present utility model is done and is illustrated:

Associating iron core type three-phase reactor of the present utility model comprises, lower two three-phase reactors, on, lower two three-phase reactors comprise coil, on, the inductance value difference of lower two three-phase reactors, on, the coil series connection of lower two three-phase reactors, and excitatory direction is consistent on iron core column, simultaneously, the upper yoke of the lower yoke of reactor and following reactor shares an iron yoke, when two three-phase reactors are worked simultaneously, the magnetic flux produced in sharing the iron yoke is cancelled out each other because direction is different, share actual magnetic flux in the iron yoke and be about the poor of two reactor independence magnetic flux.

The utility model is combined the iron core composition and is formed the associating iron core by upper yoke 1, upper core post 10, shared iron yoke 2, lower core post 11, lower yoke 3, and uses base 4, lower yoke to fix with folder 5, shared iron yoke and fix with folder 6, upper yoke and fix with materials such as folder 7 and corresponding bolts and be fixed.

The coiling of coil, installation and connection, coil winding: the coiling direction of upper and lower coil needs consistent, and coil is installed: the installation direction of upper and lower coil needs consistent; Coil connects: A2 and A3 short circuit; B2 and B3 short circuit; C2 and C3 short circuit; Coiling direction, installation direction and the connected mode of coil, also can make corresponding adjustment according to different product, only needs to guarantee excitatory direction identical get final product of upper and lower coil in iron core column separately.

The principle explanation

Impose a condition: 1) upper reactor inductance value is less, and under the electric current I condition, independent generation magnetic flux is 1 Ф

2) lower reactor inductance amount is larger, and under the electric current I condition, independent generation magnetic flux is 2 Ф

The A of take certain moment static state mutually is example, because series connection is used, fundamental current is all I, excitatory synchronous, direction is all upwards, and as shown in the schematic diagram of accompanying drawing 4, the flow direction of two reactors in sharing the iron yoke is contrary, can cancel out each other, the actual magnetic flux in therefore shared iron yoke is difference 1 Ф of two reactor independence magnetic flux approximately.

Claims

1. comprise upper and lower two three-phase reactors, upper and lower two three-phase reactors comprise coil, it is characterized in that: the inductance value difference of upper and lower two three-phase reactors, the coil series connection of upper and lower two three-phase reactors, and excitatory direction is consistent on iron core column, simultaneously, the upper yoke of the lower yoke of reactor and following reactor shares an iron yoke, when two three-phase reactors are worked simultaneously, the magnetic flux produced in sharing the iron yoke is cancelled out each other because direction is different, shares actual magnetic flux in the iron yoke and is about the poor of two reactor independence magnetic flux.