CN105826064B - A kind of REgulatable reactor converted based on magnetic circuit - Google Patents
A kind of REgulatable reactor converted based on magnetic circuit Download PDFInfo
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- CN105826064B CN105826064B CN201610335880.7A CN201610335880A CN105826064B CN 105826064 B CN105826064 B CN 105826064B CN 201610335880 A CN201610335880 A CN 201610335880A CN 105826064 B CN105826064 B CN 105826064B
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- iron core
- core column
- magnetic circuit
- air gap
- current
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
- H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit
-
- 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
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
Abstract
A kind of REgulatable reactor converted based on magnetic circuit, is related to REgulatable reactor regulation inductive technologies field.It is in order to solve the problem of existing iron core reactor is also easy to produce harmonic wave.The iron core column of the present invention（1）, upper yoke, iron core column（3）With lower yoke successively end to end composition rectangle main magnetic circuit framework, additional iron core column is located in rectangle main magnetic circuit framework and iron core column（1）It is arranged in parallel, small air gap is arranged in upper yoke, big air gap is arranged in additional iron core column, and Working winding is spirally wound on iron core column（1）On, controling winding is spirally wound on iron core column（3）On, the exchange flux that Working winding the is produced instantaneous flow direction of exchange flux that instantaneously flow direction should be produced with controling winding is mutually to top, Detection ＆ Controling circuit is used to produce a, phase identical, amplitude variable electric current equal with Working winding power frequency, and filter capacitor and definite value inductance play a part of to suppress high frequency ripple.The present invention has the advantages that not produce harmonic wave.The present invention is applied to REgulatable reactor technical field.
Description
Technical field
The present invention relates to REgulatable reactor technical field, more particularly to a kind of REgulatable reactor regulation converted based on magnetic circuit
Inductive technologies field.
Background technology
At present it is known that the adjustable iron core reactor of inductance parameters be divided into it is following several：First, tradition machinery formula regulative reactance
Device, the regulative mode of this reactor is divided into turn-adjusting and adjusting gapped-core type again.Turn-adjusting reactor is easy to adjust, and cost is low, but
Inductance value can not be continuously adjusted；Adjusting gapped-core type reactor can realize inductance value continuously adjustabe, simple in construction, but its needs is high-power
Motor is matched, and vibrations and noise are big.2nd, thyristor-type controlled reactor（Thyristor Controlled
Reactor, TCR）, it is in series by the reactor of one group of anti-parallel thyristor and preset parameter, by controlling leading for IGCT
Current flow angle realizes that inductance value is continuously adjusted, but which introduces power electronic devices, necessarily leads to harmonic pollution, and cannot be used for superelevation
Have a meeting, an audience, etc. well under one's control conjunction.3rd, magnet controlled reactor, this reactor can be according to AC and DC control mode point, and Typical Representative is that magnetic valve type can
Control reactor and direct current magnetism-assisting formula controlled reactor.Its operation principle is by handing over（Directly）Flow control core sataration degree, changes
The equivalent relative permeability of iron core is so as to realize that inductance value is adjustable, but iron core is in saturation state in longtime running, and loss is big,
Harmonic wave is big.4th, based on pulse modulation technology（Pulse Width Modulation, PWM）Controlled reactor, it is by fixing
The reactor and insulated gate bipolar transistor of parameter（IGBT）The alternating-current switch constituted Deng device is in series, and is accounted for by regulation
Sky ratio flows through the equal currents of reactor to adjust, so that from the point of view of to external circuit, it is equivalent to the reactor of Parameter adjustable.It is special
Point is in response to that speed is fast, inductance value continuously smooth is adjustable, but application scenario is constrained by the pressure-resistant condition of power electronic devices.
5th, superconductive controllable reactor, this reactor winding is made of superconductor, and electricity is realized using the conversion of superconducting state and normal state
The regulation of inductance value.But it is a technical barrier to improve the heat endurance of superconducting coil and the A.C.power loss of reduction superconductor.
The content of the invention
The invention aims to solve the problem of existing iron core reactor is also easy to produce harmonic wave, propose a kind of based on magnetic circuit
The REgulatable reactor of conversion.
It is of the present invention it is a kind of based on magnetic circuit convert REgulatable reactor include iron core column 1, upper yoke 2, iron core column 3,
Lower yoke 4, in addition to additional iron core column 5, Working winding 6, controling winding 7, small air gap 8, big air gap 9, fundamental Current's Detection 10,
Feedback current detection 11, current control module 12, PWM control with driving 13, voltage source inverter 14, DC power supply 15,
Current transformer ct1, current transformer ct2, grid ac voltage Ua, filter capacitor Cd, definite value inductance Ld；
The iron core column 1, upper yoke 2, iron core column 3 and lower yoke 4 are end to end successively to constitute rectangle main magnetic circuit framework, work
Make winding 6 to be spirally wound in iron core column 1, controling winding 7 is spirally wound in iron core column 3, the AC magnetism that Working winding 6 is produced
The instantaneous flow direction of exchange flux that logical instantaneous flow direction should be produced with controling winding 7 is mutually to top；
Additional iron core column 5 is located in rectangle main magnetic circuit framework, and the additional iron core column 5 be arranged in parallel with iron core column 1, described
The additional upper end of iron core column 5 is fixedly connected with upper yoke 2, lower end is fixedly connected with lower yoke 4, and small air gap 8 is arranged at upper yoke 2
In, the small air gap 8 is located between additional iron core column 5 and iron core column 1, and big air gap 9 is arranged in additional iron core column 5, described big
Air gap 9 is equal with the distance between lower yoke 4 with big air gap 9 with the distance between upper yoke 2；
Controling winding 7, definite value inductance LdControl loop is sequentially connected in series with the output end of voltage source inverter 14, electric current is mutual
Sensor ct2Being connected across in the control loop is used to extract feedback current, filter capacitor CdIt is connected in parallel on the two ends of controling winding 7, voltage
Input and the PWM control of type inverter 14 be connecteds with the output end of driving 13, PWM control with drive 13 input and
The output end connection of current control module 12, the input of current control module 12 is simultaneously electric with fundamental Current's Detection 10, feedback
The output end connection of stream detection 11, the input of fundamental Current's Detection 10 and current transformer ct1Connection, feedback current detection 11
Input and current transformer ct2Connection, grid ac voltage UaPerformance loop, current transformer are composed in series with Working winding 6
ct1Being connected across on the performance loop is used to extract operating current, and DC power supply 15 is connected as with voltage source inverter 14
It is powered.
A kind of shape of cross section of the iron core column 1 of REgulatable reactor converted based on magnetic circuit of the present invention to be circular or
Rectangle.
A kind of shape of cross section of the iron core column 3 of REgulatable reactor converted based on magnetic circuit of the present invention to be circular or
Rectangle.
A kind of shape of cross section of the Working winding 6 of REgulatable reactor converted based on magnetic circuit of the present invention is circle
Or rectangle.
A kind of shape of cross section of the controling winding 7 of REgulatable reactor converted based on magnetic circuit of the present invention is circle
Or rectangle.
A kind of iron core column 1 of REgulatable reactor converted based on magnetic circuit of the present invention, upper yoke 2, iron core column 3, under
Iron yoke 4 is equal with the cross-sectional area of additional iron core column 5.
Upper yoke 2, lower yoke 4 and the additional iron core column of a kind of REgulatable reactor converted based on magnetic circuit of the present invention
5 shape of cross section is rectangle.
A kind of length of the small air gap 8 of REgulatable reactor converted based on magnetic circuit of the present invention is l1, big air gap 9
Length is l2, relation is between the length of the small air gap 8 and the length of big air gap 9：l2>l1。
Brief description of the drawings
Fig. 1 faces structure chart for a kind of REgulatable reactor converted based on magnetic circuit of the present invention；
Fig. 2 is Fig. 1 top view；
Fig. 3 is Fig. 1 left view；
Fig. 4 is a kind of fundamental diagram of the REgulatable reactor converted based on magnetic circuit of the present invention.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1 to Fig. 4, one kind described in present embodiment is based on magnetic
The REgulatable reactor of road conversion includes iron core column 1, upper yoke 2, iron core column 3, lower yoke 4, in addition to additional iron core column 5, work
Winding 6, controling winding 7, small air gap 8, big air gap 9, fundamental Current's Detection 10, feedback current detection 11, current control module 12,
PWM is controlled and driving 13, voltage source inverter 14, DC power supply 15, current transformer ct1, current transformer ct2, power network
Alternating voltage Ua, filter capacitor Cd, definite value inductance Ld；
The iron core column 1, upper yoke 2, iron core column 3 and lower yoke 4 are end to end successively to constitute rectangle main magnetic circuit framework, work
Make winding 6 to be spirally wound in iron core column 1, controling winding 7 is spirally wound in iron core column 3, the AC magnetism that Working winding 6 is produced
The instantaneous flow direction of exchange flux that logical instantaneous flow direction should be produced with controling winding 7 is mutually to top；
Additional iron core column 5 is located in rectangle main magnetic circuit framework, and the additional iron core column 5 be arranged in parallel with iron core column 1, described
The additional upper end of iron core column 5 is fixedly connected with upper yoke 2, lower end is fixedly connected with lower yoke 4, and small air gap 8 is arranged at upper yoke 2
In, the small air gap 8 is located between additional iron core column 5 and iron core column 1, and big air gap 9 is arranged in additional iron core column 5, described big
Air gap 9 is equal with the distance between lower yoke 4 with big air gap 9 with the distance between upper yoke 2；
Controling winding 7, definite value inductance LdControl loop is sequentially connected in series with the output end of voltage source inverter 14, electric current is mutual
Sensor ct2Being connected across in the control loop is used to extract feedback current, filter capacitor CdIt is connected in parallel on the two ends of controling winding 7, voltage
Input and the PWM control of type inverter 14 be connecteds with the output end of driving 13, PWM control with drive 13 input and
The output end connection of current control module 12, the input of current control module 12 is simultaneously electric with fundamental Current's Detection 10, feedback
The output end connection of stream detection 11, the input of fundamental Current's Detection 10 and current transformer ct1Connection, feedback current detection 11
Input and current transformer ct2Connection, grid ac voltage UaPerformance loop, current transformer are composed in series with Working winding 6
ct1Being connected across on the performance loop is used to extract operating current, and DC power supply 15 is connected as with voltage source inverter 14
It is powered.
Embodiment two：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, present embodiment with described in embodiment one
A kind of difference of REgulatable reactor converted based on magnetic circuit be：The shape of cross section of described iron core column 1 is circular or square
Shape.
Embodiment three：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, present embodiment with described in embodiment one
A kind of difference of REgulatable reactor converted based on magnetic circuit be：The shape of cross section of described iron core column 3 is circular or square
Shape.
Embodiment four：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, present embodiment with described in embodiment one
A kind of difference of REgulatable reactor converted based on magnetic circuit be：The shape of cross section of described Working winding 6 to be circular or
Rectangle.
Embodiment five：Illustrate present embodiment with reference to Fig. 1 to Fig. 3, present embodiment with described in embodiment one
A kind of difference of REgulatable reactor converted based on magnetic circuit be：The shape of cross section of described controling winding 7 to be circular or
Rectangle.
Embodiment six：Illustrate present embodiment with reference to Fig. 1 to Fig. 3, present embodiment with described in embodiment one
A kind of difference of REgulatable reactor converted based on magnetic circuit be：Described iron core column 1, upper yoke 2, iron core column 3, lower yoke
4 is equal with the cross-sectional area of additional iron core column 5.
Embodiment seven：Illustrate present embodiment with reference to Fig. 1 to Fig. 3, present embodiment with described in embodiment one
A kind of difference of REgulatable reactor converted based on magnetic circuit be：Described upper yoke 2, lower yoke 4 and additional iron core column 5
Shape of cross section is rectangle.
Embodiment eight：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, present embodiment with described in embodiment one
A kind of difference of REgulatable reactor converted based on magnetic circuit be：The length l of described small air gap 81With the length of big air gap 9
l2Between relation be：l2>l1。
Embodiment nine：Illustrate present embodiment with reference to Fig. 4, one kind described in present embodiment is converted based on magnetic circuit
The operation principle of REgulatable reactor be：One and power frequency phase in Working winding 6 are injected in described controling winding 7
Deng, the alternating current that phase is identical, amplitude is variable, by adjusting the size of electric current in controling winding 7, Working winding 6 is forced to produce
Raw exchange flux flows through magnetic circuit and is transformed to A-B-E-F-A by A-C-D-F-A, reaches the purpose of magnetic circuit conversion, and then adjust
Inductance value.
The fundamental Current's Detection 10, feedback current detection 11, current control module 12, PWM controls and driving 13 and electricity
Die mould inverter 14 is used to produce an alternating current being injected into controling winding 7, filter capacitor CdWith definite value inductance LdFor
Suppress high frequency ripple.
When Working winding 6 is passed through alternating current, 7 obstructed electric current of controling winding, Working winding 6 produces an exchange flux.
Due to being provided with big air gap 9 in additional iron core column 5, magnetic resistance is very big, and exchange flux is all along the minimum magnetic circuit A-C-D-F-A of magnetic resistance
Circulation.Again because the relative permeability of ferromagnetic material is far longer than the relative permeability of air gap, the magnetic resistance of ferromagnetic material is neglected,
The equivalent magnetic resistance for thinking the magnetic circuit is Rm1, inductance value calculation formula is：
In formula, N1For the number of turn of Working winding 6；Rm1For the magnetic resistance of small air gap 8；S1For the equivalent magnetic conduction of the magnetic resistance of small air gap 8
Area；l1Length for small air gap 8 along flow direction；μ0For space permeability, its numerical value is known constant μ0=4π×10-7H/m。
A, phase equal with power frequency in Working winding 6 is injected when Working winding 6 is passed through alternating current, controling winding 7
What the exchange flux that current value is increased to produced by making it in position identical alternating current, controling winding 7 was produced with Working winding 6
Exchange flux B points it is equal in magnitude, it is in opposite direction when（It is equal in magnitude, in opposite direction in E points during negative half period）, force work around
The exchange flux that group 6 is produced circulates along magnetic circuit A-B-E-F-A, and alternating current equivalent magnetic resistance is small air gap 8 and big air gap 9 in the magnetic circuit
Magnetic resistance sum, inductance value calculation formula is：
In formula, Rm2For the magnetic resistance of big air gap 9；S2For the equivalent magnetic conductive area of the big magnetic resistance of air gap 9；l2It is big air gap 9 along magnetic
The length in logical direction.
The size of current for now needing to be injected into controling winding 7 is now derived, respectively to Working winding 6 and controling winding 7
The ohmic law of equation on row write magnetic road：
Make φ1=φ2, two formulas compared to obtain needed for maximum current value：
In formula, N2For the number of turn of controling winding 7；F1For the exchange magnetomotive force of Working winding 6；F2For the exchange of controling winding 7
Magnetomotive force；I1For current value in Working winding 6；I2For current value in controling winding 7；φ1The AC magnetism produced for Working winding 6
It is logical；φ2The exchange flux produced for controling winding 7.
In addition to above two special circumstances, size of current in regulation controling winding 7 so that electric current I2I is arrived 02maxBetween
During change, inductance value is in LmaxWith LminBetween change；Change the proportionate relationship of big air gap 9 and small air gap 8, thus it is possible to vary inductance value
Adjustable range；During whole regulation, the magnetic circuit that the exchange flux that Working winding 6 is produced is flowed through is converted by A-C-D-F-A
For A-B-E-F-A, magnetic resistance is set to become big, magnetic flux reduction and main magnetic circuit band air gap, iron core is difficult saturation, does not produce harmonic wave interference.
Claims (8)
1. a kind of REgulatable reactor converted based on magnetic circuit, including iron core column 1, upper yoke 2, iron core column 3, lower yoke 4, its feature
It is：It also include additional iron core column 5, Working winding 6, controling winding 7, small air gap 8, big air gap 9, fundamental Current's Detection 10,
Feedback current detection 11, current control module 12, PWM control with driving 13, voltage source inverter 14, DC power supply 15,
Current transformer ct1, current transformer ct2, grid ac voltage Ua, filter capacitor Cd, definite value inductance Ld；
The iron core column 1, upper yoke 2, iron core column 3 and lower yoke 4 successively it is end to end composition rectangle main magnetic circuit framework, work around
Group 6 is spirally wound in iron core column 1, and controling winding 7 is spirally wound in iron core column 3, the exchange flux wink that Working winding 6 is produced
Instantaneously flow direction is mutual to top for the exchange flux that Shi Liuxiang should be produced with controling winding 7；
Additional iron core column 5 is located in rectangle main magnetic circuit framework, and the additional iron core column 5 be arranged in parallel with iron core column 1, described additional
The upper end of iron core column 5 is fixedly connected with upper yoke 2, lower end is fixedly connected with lower yoke 4, and small air gap 8 is arranged in upper yoke 2, institute
State small air gap 8 to be located between additional iron core column 5 and iron core column 1, big air gap 9 is arranged in additional iron core column 5, the big air gap 9
It is equal with the distance between lower yoke 4 with big air gap 9 with the distance between upper yoke 2；
Controling winding 7, definite value inductance LdControl loop, current transformer are sequentially connected in series with the output end of voltage source inverter 14
ct2Being connected across in the control loop is used to extract feedback current, filter capacitor CdThe two ends of controling winding 7 are connected in parallel on, voltage-type is inverse
The input and PWM controls for becoming device 14 are connected with the output end of driving 13, the input and electric current of the PWM controls and driving 13
The output end connection of control module 12, the input of current control module 12 is examined with fundamental Current's Detection 10, feedback current simultaneously
The output end for surveying 11 is connected, the input of fundamental Current's Detection 10 and current transformer ct1Connection, the input of feedback current detection 11
End and current transformer ct2Connection, grid ac voltage UaPerformance loop, current transformer ct are composed in series with Working winding 61
Being connected across on the performance loop is used to extract operating current, and DC power supply 15 is connected as its confession with voltage source inverter 14
Electricity.
2. a kind of REgulatable reactor converted based on magnetic circuit according to claim 1, it is characterised in that：Described iron core column
1 shape of cross section is circular or rectangle.
3. a kind of REgulatable reactor converted based on magnetic circuit according to claim 1, it is characterised in that：Described iron core column
3 shape of cross section is circular or rectangle.
4. a kind of REgulatable reactor converted based on magnetic circuit according to claim 1, it is characterised in that：Described work around
The shape of cross section of group 6 is circular or rectangle.
5. a kind of REgulatable reactor converted based on magnetic circuit according to claim 1, it is characterised in that：Described control around
The shape of cross section of group 7 is circular or rectangle.
6. a kind of REgulatable reactor converted based on magnetic circuit according to claim 1, it is characterised in that：Described iron core column
1st, upper yoke 2, iron core column 3, lower yoke 4 are equal with the cross-sectional area of additional iron core column 5.
7. a kind of REgulatable reactor converted based on magnetic circuit according to claim 1, it is characterised in that：Described upper yoke
2nd, lower yoke 4 and the shape of cross section of additional iron core column 5 are rectangle.
8. a kind of REgulatable reactor converted based on magnetic circuit according to claim 1, it is characterised in that：Described small air gap
8 length is l1, big air gap 9 length be l2, relation is between the length of the small air gap 8 and the length of big air gap 9：l2>
l1。
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| JP6734328B2 (en) * | 2018-08-06 | 2020-08-05 | 株式会社京三製作所 | Reactor |
| CN109686539A (en) * | 2019-02-15 | 2019-04-26 | 佛山市顺德区伊戈尔电力科技有限公司 | A kind of inductor |
| CN112072624B (en) * | 2020-09-15 | 2022-11-18 | 国网山东省电力公司济南市历城区供电公司 | Fault current limiter based on iron core type split reactor |
| CN113162046B (en) * | 2021-03-30 | 2023-04-07 | 国网河北省电力有限公司雄安新区供电公司 | Three-phase alternating current adjustable reactor and harmonic suppression device |
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| GB895633A (en) * | 1958-12-30 | 1962-05-02 | Brush Electrical Eng | Improvements in and relating to air-gapped transductors |
| JP2000208342A (en) * | 1998-12-15 | 2000-07-28 | Alcatel | Magnetic integrator of planar inductor for switched power converter |
| CN201937535U (en) * | 2011-02-22 | 2011-08-17 | 新华都特种电气股份有限公司 | Flux control and pulse width modulation (PWM) control based controllable reactor |
| CN103325528A (en) * | 2013-07-11 | 2013-09-25 | 哈尔滨理工大学 | Direct current magnetic control adjustable reactor with air gap |
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| CN205828120U (en) * | 2016-05-20 | 2016-12-21 | 哈尔滨理工大学 | A kind of REgulatable reactor based on magnetic circuit conversion |
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