CN103545090A - Direct current reactor for large-scale frequency conversion controller - Google Patents
Direct current reactor for large-scale frequency conversion controller Download PDFInfo
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- CN103545090A CN103545090A CN201210240457.0A CN201210240457A CN103545090A CN 103545090 A CN103545090 A CN 103545090A CN 201210240457 A CN201210240457 A CN 201210240457A CN 103545090 A CN103545090 A CN 103545090A
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- direct current
- iron core
- current reactor
- frequency conversion
- conversion controller
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Abstract
The invention provides a direct current reactor for a large-scale frequency conversion controller. The direct current reactor for the large-scale frequency conversion controller comprises an iron core and a coil which is wound on the iron core. Air gaps are formed in two opposite corners of the iron core, and permanent magnets are embedded in the two air gaps respectively. According to the direct current reactor for the large-scale frequency conversion controller, permanent magnetic materials and soft magnetic materials are combined to be used, by the adoption of the magnetic biasing principle, the area of a hysteresis loop is effectively utilized, and the maximum utilization of magnetic induction intensity can be achieved; the multiplicative effect of pulse magnetic permeability and inductive reactance is achieved, the EMC effect is improved to the maximum degree, product miniaturization and high power are achieved, energy is saved, and consumption is reduced.
Description
Technical field
The present invention relates to the frequency-variable controller for high power three-phase motor, particularly in large-size variable-frequency controller, play the direct current reactor of chokes filter action.
Background technology
In the large-size variable-frequency controller of the high power three-phase motor using in industries such as wind power generation, electric drive, weaving, petroleum recoverings at present, for keeping rectified current continuous, reduce current pulsation value, improve input power factor and suppress harmonic wave, common way is the chokes Director Current Reactor for Filtering of connecting with converter or set of converters in DC side.
Direct current reactor generally adopts core structure, iron core and the coil being wound on iron core, consists of.In direct current reactor, the electric current being passed through in coil is unidirectional direct current, so also only has unidirectional coil flux in iron core.Along with the increase of coil current, be added in the also proportional increase of magnetic potential on magnetic circuit, it is saturated that the magnetic flux density of iron core tends to gradually.Therefore, the inductance value of reactor can reduce gradually.If add the permanent magnet that size and Orientation is constant on magnetic circuit, on magnetic circuit, add a direct current biasing, make the permanent magnet magnetic flux direction of its generation contrary with the flow direction that direct current produces, just can reduce magnetic potential total on magnetic circuit, reduce the degree of saturation of magnetic flux density in iron core, thereby in the situation that keeping institute's galvanization constant, increase inductance.In other words, requiring, under the certain condition of inductance value and institute's galvanization, by add permanent magnet on magnetic circuit, can to reduce the volume and weight of direct current reactor.
Chinese patent CN98249905.1 discloses a kind of direct current reactor that adds permanent magnet in air-gap, but in this scheme, in iron core, only has place's permanent magnet, and permanent magnet arranges on the arm of iron core, structural symmetry is not high, combination to permanent magnetism technology and soft magnetism technology reaches far away optimum efficiency, and the parameters such as the volume of direct current reactor, power cannot meet the performance requirement of large-size variable-frequency control system.
Summary of the invention
For the problems referred to above, applicant studies by the best fit technology to two kinds of magnetic materials, a kind of large-size variable-frequency controller direct current reactor is provided, solve remanent magnetism and linear and magnetically saturated relation in magnetic bias work, to meet EMC and the installation volume requirement of large-size variable-frequency control system chokes filter.
Technical scheme of the present invention is as follows:
A controller direct current reactor, comprises iron core and is wound in the coil on iron core, Liang Ge corner relative on described iron core offers air-gap, in described two air-gaps, is embedded with respectively permanent magnet.
Its further technical scheme is: the material of described permanent magnet is neodymium iron boron.
Useful technique effect of the present invention is:
The present invention is combined with permanent magnetic material with soft magnetic material, application magnetic bias principle is effectively utilized the area of magnetic hysteresis loop, reaches the maximum utilization of magnetic flux density; Realize the multiplication effect of pulse permeability and induction reactance, improve to greatest extent EMC effect; Realize product miniaturization, high-power, energy-saving and cost-reducing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, formation of the present invention comprises iron core 1, coil 2 and permanent magnet 3.Its coil 2 is wound on iron core 1, and Liang Ge corner relative on iron core 1 offers air-gap, in two air-gaps, is embedded with respectively permanent magnet 3.In the present embodiment, the material of permanent magnet 3 is neodymium iron boron (N33EH).After energising, magnetic flux density of the present invention, pulse permeability and induction reactance will be significantly increased than existing product.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate without departing from the basic idea of the present invention, within all should thinking and being included in protection scope of the present invention.
Claims (2)
1. a large-size variable-frequency controller direct current reactor, comprise iron core (1) and be wound in the coil (2) on iron core, it is characterized in that: Liang Ge corner relative on described iron core offers air-gap, in described two air-gaps, be embedded with respectively permanent magnet (3).
2. large-size variable-frequency controller direct current reactor according to claim 1, is characterized in that: the material of described permanent magnet (3) is neodymium iron boron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240457.0A CN103545090A (en) | 2012-07-12 | 2012-07-12 | Direct current reactor for large-scale frequency conversion controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240457.0A CN103545090A (en) | 2012-07-12 | 2012-07-12 | Direct current reactor for large-scale frequency conversion controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103545090A true CN103545090A (en) | 2014-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210240457.0A Pending CN103545090A (en) | 2012-07-12 | 2012-07-12 | Direct current reactor for large-scale frequency conversion controller |
Country Status (1)
| Country | Link |
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| CN (1) | CN103545090A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761882A (en) * | 2016-04-18 | 2016-07-13 | 长兴盛强电子器材有限公司 | Inductor |
| CN109698625A (en) * | 2018-11-21 | 2019-04-30 | 东华大学 | Improve the implementation method of flyback power converter transformer output power density |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450403A (en) * | 1987-08-20 | 1989-02-27 | Brother Ind Ltd | Composite magnetic core and manufacture thereof |
| CN102097196A (en) * | 2010-12-20 | 2011-06-15 | 北京云电英纳超导电缆有限公司 | Iron core structure with permanent magnet materials for auxiliary excitation |
| CN202307442U (en) * | 2011-10-21 | 2012-07-04 | 无锡晶磊电子有限公司 | Direct current (DC) reactor for large variable frequency controller |
-
2012
- 2012-07-12 CN CN201210240457.0A patent/CN103545090A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450403A (en) * | 1987-08-20 | 1989-02-27 | Brother Ind Ltd | Composite magnetic core and manufacture thereof |
| CN102097196A (en) * | 2010-12-20 | 2011-06-15 | 北京云电英纳超导电缆有限公司 | Iron core structure with permanent magnet materials for auxiliary excitation |
| CN202307442U (en) * | 2011-10-21 | 2012-07-04 | 无锡晶磊电子有限公司 | Direct current (DC) reactor for large variable frequency controller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761882A (en) * | 2016-04-18 | 2016-07-13 | 长兴盛强电子器材有限公司 | Inductor |
| CN109698625A (en) * | 2018-11-21 | 2019-04-30 | 东华大学 | Improve the implementation method of flyback power converter transformer output power density |
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Application publication date: 20140129 |
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| WD01 | Invention patent application deemed withdrawn after publication |