CN107731480B - High leakage inductance differential mode reactor for power electronic converter - Google Patents
High leakage inductance differential mode reactor for power electronic converter Download PDFInfo
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- CN107731480B CN107731480B CN201710720640.3A CN201710720640A CN107731480B CN 107731480 B CN107731480 B CN 107731480B CN 201710720640 A CN201710720640 A CN 201710720640A CN 107731480 B CN107731480 B CN 107731480B
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- magnetic core
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- differential mode
- bypass
- power electronic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
Abstract
The invention discloses a high leakage inductance differential mode reactor for a power electronic converter, which comprises an annular magnetic core, a first coil and a second coil, wherein the first coil and the second coil are wound on two sides of the annular magnetic core; the invention provides a path for the same-phase property differential mode magnetic fields of different branches in the multiple power electronic converter device through the annular magnetic core so as to inhibit the same-phase differential mode current; the bypass magnetic core is arranged beside the annular magnetic core, so that a passage with smaller magnetic resistance is provided for a leakage magnetic field, and the purposes of increasing leakage inductance and effectively inhibiting opposite-phase differential mode currents in different branches in the multiple power electronic converter are achieved.
Description
Technical Field
The invention belongs to an electrical component, relates to a filter device, and particularly relates to a high leakage inductance differential mode reactor for a power electronic converter device in the fields of multiple electric energy conversion, electric transmission and the like.
Background
High power electronic converter devices are often used in the fields of electric energy conversion and electric drive.
When the high-power electronic converter works, a large amount of harmonic current with rich frequency content can be generated inevitably, and the normal work and safe operation of equipment are seriously influenced by the harmonic current.
The most commonly used method for suppressing harmonic current is to use a reactor for filtering, but the traditional reactors have inherent defects:
1) when a common reactor is adopted, the inductance of each frequency is basically the same, but because the amplitude of the high-order harmonic wave of the power electronic converter device is gradually reduced and the frequency is increased, the required inductance is smaller than that of the low-order harmonic wave, and partial inductance is wasted.
2) When a common differential mode reactor is adopted, a magnetic circuit is easy to saturate, and the volume of equipment occupied by the reactor is large.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a high leakage inductance differential mode reactor for a power electronic converter.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high leakage inductance differential mode reactor for a power electronic converter comprises an annular magnetic core made of a magnetic conduction material, a first coil and a second coil, wherein the first coil and the second coil are wound on two sides of the annular magnetic core and used for flowing currents of different branches in a multiple power electronic converter, magnetic fields generated by same-phase property currents in the first coil and the second coil circulate in the annular magnetic core, the first coil and the second coil are connected with a first power supply and a second power supply which are used as converters respectively, a first bypass magnetic core and a second bypass magnetic core made of the magnetic conduction material are arranged on two sides of the annular magnetic core respectively, and magnetic fields generated by opposite-phase property currents in the first coil and the second coil and magnetic fields generated by part of same-phase property currents circulate in the first bypass magnetic core and the second bypass magnetic core.
The high leakage inductance differential mode reactor for the power electronic converter device is characterized in that the air gap distance between the first bypass magnetic core, the second bypass magnetic core and the annular magnetic core is adjustable.
The invention has the beneficial effects that: providing a path for the same-phase property differential mode magnetic fields of different branches in the multiple power electronic converter device through the annular magnetic core so as to inhibit the same-phase differential mode current; the bypass magnetic core is arranged beside the annular magnetic core, so that a passage with smaller magnetic resistance is provided for a leakage magnetic field, and the purposes of increasing leakage inductance and effectively inhibiting opposite-phase differential mode currents in different branches in the multiple power electronic converter are achieved; the high leakage inductance differential mode reactor provided by the invention is equivalent to combining two differential mode reactors, so that the number of structural members required to be used in the process of manufacturing the reactor is reduced, and the cost is saved; the method has an inhibiting effect on the same-phase differential mode property current and the opposite-phase differential mode property current; the magnetic circuit is not easy to saturate, which is beneficial to reducing the volume occupied by the reactor; in addition, the device has the advantages of small volume, light weight and small number of structural members, and has the characteristics of in-phase differential mode current suppression and anti-phase differential mode property current suppression.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The figures are numbered: 1-first bypass magnetic core, 2-annular magnetic core, 3-first coil, 4-second bypass magnetic core, 5-first power supply, 6-second power supply, 7-second coil.
Detailed Description
The invention is further illustrated by the following figures and examples.
FIG. 1 is an embodiment of the present invention.
Referring to fig. 1, the invention discloses a position-controllable sign-in system based on a mobile terminal, comprising an annular magnetic core 2 made of a magnetic conductive material, and a first coil 3 and a second coil 7 which are wound on two sides of the annular magnetic core 2 by the conductive material and are used for flowing different branch currents in a multiple power electronic converter, wherein the annular magnetic core 2 with the same phase property utilizes the same-phase difference mode current generated by the magnetic conductive material to generate a magnetic field path, the magnetic field generated by the same-phase property difference mode current in the first coil 3 and the second coil 7 mainly flows in the annular magnetic core 2, the annular magnetic core 2 provides a path for the difference mode magnetic field to play a role of inhibiting the same-phase difference mode current, the first coil 3 and the second coil 7 are respectively connected with a first power supply 5 and a second power supply 6, the first power supply 5 and the second power supply 6 are two-way converters, a first bypass magnetic core 1 and a second bypass magnetic core 4 made of the magnetic conductive material are respectively arranged on two sides, the magnetic field generated by the anti-phase property current in the first coil 3 and the second coil 7 and the magnetic field generated by part of the in-phase property current in the multiple power electronic converter circulate in the first bypass magnetic core 1 and the second bypass magnetic core 4, the bypass magnetic cores provide a passage for the leakage magnetic field generated by the anti-phase differential mode property current in the two sets of coils, inhibit the in-phase property current, and play the roles of reducing the leakage magnetic resistance, increasing the leakage inductance and inhibiting the anti-phase differential mode current.
The first power supply 5 and the second power supply 6 enable the fundamental current I output by the converter to pass through a phase shift modulation algorithm1And I1The magnetic fluxes formed in the annular magnetic core 2 are mutually offset to make the switching frequency sub-odd number frequency multiplication harmonic I3And I3The magnetic fluxes formed in the toroidal core 2 reinforce each other to make the subharmonics I of the switching frequency even-numbered times3And I3The magnetic fluxes formed in the first and second bypass cores 1 and 4 reinforce each other.
In the design and manufacture process, the size of the air gap distance between the first bypass magnetic core 1 and the second bypass magnetic core 4 and the annular magnetic core 2 is adjusted to adjust the leakage inductance value required by the differential mode reactor.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (1)
1. A high leakage inductance differential mode reactor for a power electronic converter device is characterized in that: the magnetic field generated by the current with the same phase property in the first coil (3) and the second coil (7) is communicated in the annular magnetic core (2), the first coil (3) and the second coil (7) are respectively connected with a first power supply (5) and a second power supply (6) which are used as current transformers, the first bypass magnetic core (1) and the second bypass magnetic core (4) which are made of magnetic conductive materials and adjustable in air gap distance with the annular magnetic core (2) are also respectively arranged on two sides of the annular magnetic core (2), the magnetic field generated by the current with the opposite phase property in the first coil (3) and the second coil (7) and the magnetic field generated by part of the current with the same phase property are communicated in the first bypass magnetic core (1) and the second bypass magnetic core (4), the first power supply (5) and the second power supply (6) enable the magnetic fluxes formed by the fundamental currents I1 and I1 ' in the annular magnetic core (2) to be mutually cancelled through a phase-shift modulation algorithm, enable the magnetic fluxes formed by the odd-numbered harmonics I3 and I3 ' of the switching frequency to be mutually strengthened in the annular magnetic core (2), and enable the magnetic fluxes formed by the even-numbered harmonics I3 and I3 ' of the switching frequency to be mutually strengthened in the first bypass magnetic core (1) and the second bypass magnetic core (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720640.3A CN107731480B (en) | 2017-08-21 | 2017-08-21 | High leakage inductance differential mode reactor for power electronic converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720640.3A CN107731480B (en) | 2017-08-21 | 2017-08-21 | High leakage inductance differential mode reactor for power electronic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107731480A CN107731480A (en) | 2018-02-23 |
| CN107731480B true CN107731480B (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710720640.3A Active CN107731480B (en) | 2017-08-21 | 2017-08-21 | High leakage inductance differential mode reactor for power electronic converter |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364801Y (en) * | 2009-02-12 | 2009-12-16 | 张帆 | Flux cancellation reactor |
| CN106664059A (en) * | 2015-01-27 | 2017-05-10 | 华为技术有限公司 | Resonator circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0547572A (en) * | 1991-08-14 | 1993-02-26 | Yokogawa Electric Corp | Common mode choke coil and switching power supply device |
| US20080074227A1 (en) * | 2006-09-21 | 2008-03-27 | Ford Global Technologies, Llc | Inductor topologies with substantial common-mode and differential-mode inductance |
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2017
- 2017-08-21 CN CN201710720640.3A patent/CN107731480B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364801Y (en) * | 2009-02-12 | 2009-12-16 | 张帆 | Flux cancellation reactor |
| CN106664059A (en) * | 2015-01-27 | 2017-05-10 | 华为技术有限公司 | Resonator circuit |
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| CN107731480A (en) | 2018-02-23 |
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