CN110783073A - Magnetic integration three-in-one reactor - Google Patents
Magnetic integration three-in-one reactor Download PDFInfo
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- CN110783073A CN110783073A CN201911095938.5A CN201911095938A CN110783073A CN 110783073 A CN110783073 A CN 110783073A CN 201911095938 A CN201911095938 A CN 201911095938A CN 110783073 A CN110783073 A CN 110783073A
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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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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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
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention belongs to the technical field of reactors, and particularly relates to a magnetic integration three-in-one reactor which comprises an iron core assembly, a mounting assembly and a coil assembly, wherein the coil assembly comprises a first coil L1, a second coil L2 and a third coil L3, the tail end of the first coil L1, the head end of the second coil L2 and the tail end of the third coil L3 are connected in series, the head end of the first coil L1 is connected with a power grid, the tail end of the second coil L2 is connected with a valve side, the head end of the third coil L3 is connected with a filter capacitor to connect a grid-side reactance L1, a valve-side reactance L2 and a filter reactance L3, and three products are integrated together, so that the size, the weight and the cost are reduced, the overall loss and the external connection end can be reduced, and a better filter effect is achieved; in particular, coil L1 and coil L3 are connected in reverse directions, and the directions of the upper and lower magnetic fluxes Φ 1 and Φ 2 are made to flow in the same direction in the middle cross yoke, so that the harmonic losses in the upper and lower core circuits are reversed or nearly reversed, and the harmonic magnetic fluxes are added and cancelled or reduced.
Description
Technical Field
The invention belongs to the technical field of reactors, and particularly relates to a magnetic integration three-in-one reactor.
Background
Currently, with the rapid development of power electronics technology, more and more rectifying devices are applied to various fields. Due to the nonlinear characteristic, the input current at the network side generates serious distortion, the electromagnetic compatibility of equipment is reduced, and the damage is brought to a power grid and other electric equipment. For example, a frequency converter generates a large amount of higher harmonics in the rectification and inversion processes, and generates interference on a power supply system, a load and other adjacent electrical equipment; in fact, not limited to the inverter, the higher harmonics due to the nonlinearity are generated in the dc motor supplied with power by the thyristor, the commutatorless motor, and the like, all of which have a rectifying circuit on the power supply side. Therefore, how to suppress the current harmonics is an important task.
In the prior art, an LC filter is generally added on the network side, and in order to obtain a better filtering effect, an LCL four-quadrant filter is also commonly used, and not only this, but also 11 times and 13 times of LC filters are additionally added, so that at least 3 reactors (network side reactance, valve side reactance, filtering reactance) are required, and the cost and the volume of the system are increased by additionally arranging a capacitor. In the prior art, a network side reactor and a valve side reactor are often integrated into a double-layer reactor with a common transverse yoke to reduce the volume, but people hope that the volume of the whole machine can be further reduced, the loss is lower, and the filtering effect is better.
Therefore, the prior art needs to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the magnetic integration three-in-one reactor, which integrates a network side reactor, a valve side reactor and a filter reactor together, reduces the volume of the whole reactor and reduces the loss of the whole reactor.
In order to achieve the purpose, the invention provides a magnetic integration three-in-one reactor, which comprises an iron core assembly, a mounting assembly and a coil assembly, wherein the iron core assembly comprises an upper transverse yoke, a middle transverse yoke and a lower transverse yoke which are arranged in parallel, an upper core column arranged between the upper transverse yoke and the middle transverse yoke, and a lower core column arranged between the middle transverse yoke and the lower transverse yoke, wherein a plurality of air gaps are uniformly arranged on the upper core column and the lower core column, the mounting assembly comprises an upper clamping piece, a middle clamping piece, a lower clamping piece and an iron core internal pulling plate, wherein the upper clamping piece, the middle clamping piece and the lower clamping piece are respectively attached to two sides of the upper transverse yoke, the middle transverse yoke and the lower transverse yoke in the length direction, the upper transverse yoke, the middle transverse yoke and the lower transverse yoke are locked through transverse locking bolts, the iron core internal pulling plate is attached to two sides of the upper transverse yoke, the upper core column, the middle transverse yoke, the lower core column and the lower transverse yoke in the height, Between the middle clamping piece and the lower clamping piece; the coil assembly comprises a first coil L1, a second coil L2 and a third coil L3, wherein the first coil L1 and the second coil L2 are wound on a lower core column, the third coil L3 is wound on an upper core column, the tail end of the first coil L1, the head end of the second coil L2 and the tail end of the third coil L3 are connected in series, the head end of the first coil L1 is connected with a power grid, the tail end of the second coil L2 is connected with a valve side, the head end of the third coil L3 is connected with a filter capacitor, fundamental current is taken from the power grid side, part of the fundamental current is supplied to the valve side after flowing through the second coil L2 by the first coil L1, the other part of the fundamental current forms a reactive circuit through the first coil L1, the third coil L3 and the filter capacitor, and harmonic waves on the valve side are absorbed and eliminated through a T-type filter.
As a further improvement of the magnetic integration three-in-one reactor, the upper transverse yoke, the upper core column and the middle transverse yoke form a magnetic flux loop of the upper iron core, and the flowing magnetic flux is phi 1; the middle transverse yoke, the lower core column and the lower transverse yoke form a magnetic flux loop of the lower iron core, and the flowing magnetic flux is phi 2; the middle transverse yoke simultaneously flows through magnetic flux phi 1 and phi 2 of the magnetic circuit; the first coil L1 is reversely connected with the third coil L3, the flowing directions of magnetic circuit magnetic fluxes phi 1 and phi 2 in the middle transverse yoke are the same, and the loss and the iron core loss are generated, so that when the magnetic circuit magnetic fluxes phi 1 and phi 2 of fundamental current approach to the same phase, the loss and the effective value of fundamental waves are increased; the flow directions of harmonic current magnetic circuit magnetic fluxes phi 1 and phi 2 in the middle transverse yoke are the same, and loss and iron core loss are generated, so that when the harmonic current magnetic circuit magnetic fluxes phi 1 and phi 2 tend to be in opposite phases, loss and effective values of each sub-harmonic become small, and total loss of the middle transverse yoke becomes small.
As a further improvement of the magnetic integration three-in-one reactor, the first coil L1 and the second coil L2 share the lower core column, the harmonic content of the second coil L2 is larger than that of the first coil L1, and the loss and temperature rise of the lower core column and the magnetic flux density value in the lower core column are calculated according to the second coil L2.
As a further improvement of the magnetic integration three-in-one reactor, side edges of the upper core column and the lower core column are provided with the side yoke iron cores, and the upper transverse yoke, the middle transverse yoke and the lower transverse yoke are respectively butted with the side yoke iron cores.
As a further improvement of the magnetic integration three-in-one reactor, the upper transverse yoke, the upper core column and the middle transverse yoke and the upper part of the side yoke iron core form a magnetic flux loop of the upper iron core, and the flowing magnetic flux is phi 1; the middle transverse yoke, the lower core column, the lower transverse yoke and the lower part of the side yoke iron core form a magnetic flux loop of the lower iron core, and the flowing magnetic flux is phi 2; the middle transverse yoke simultaneously flows through magnetic flux phi 1 and phi 2 of the magnetic circuit; the side yoke iron core is used for providing a circuit for the zero sequence current of the system.
As a further improvement of the magnetic integration three-in-one reactor, three upper core columns are arranged between the upper transverse yoke and the middle transverse yoke, and three lower core columns are arranged between the middle transverse yoke and the lower transverse yoke, so as to form the three-phase reactor.
As a further improvement of the magnetic integration three-in-one reactor, an upper core column arranged between an upper transverse yoke and a middle transverse yoke and a lower core column arranged between the middle transverse yoke and a lower transverse yoke are both one, so as to form the single-phase reactor.
The magnetic integration three-in-one reactor has the beneficial effects that: three products of a network side reactance L1, a valve side reactance L2 and a filtering reactance L3 are integrated together, so that the volume is reduced, the weight is reduced, the cost is reduced, the loss of the whole machine can be reduced, external connection ends are reduced, and a better filtering effect is achieved; in particular, coil L1 and coil L3 are connected in reverse directions, and the directions of the upper and lower magnetic fluxes Φ 1 and Φ 2 are made to flow in the same direction in the middle cross yoke, so that the harmonic losses in the upper and lower core circuits are reversed or nearly reversed, and the harmonic magnetic fluxes are added and cancelled or reduced.
Drawings
FIG. 1 is a three-phase electrical diagram of the present invention;
FIG. 2 is a single phase electrical diagram of the present invention;
FIG. 3 is a three-phase three-core post wiring diagram of the present invention;
FIG. 4 is a structural view of a three-phase side-band side yoke core of the present invention;
FIG. 5 is a three-phase construction of a core with side yokes according to the invention;
FIG. 6 is a view showing the construction of a single-phase core according to the present invention;
fig. 7 is a graph of the transverse yoke flux loss in the core of the present invention;
FIG. 8 is a three-phase three-core column product profile of the present invention;
in the figure: 110-upper cross yoke; 120-middle cross yoke; 130 lower cross yoke; 140-upper left leg; 150-upper middle leg; 160-upper right stem; 170-lower left stem; 180-lower middle stem; 190-lower right stem; 101-right side upper return yoke; 102-right lower return yoke; 103-left side upper return yoke; 104-left lower return yoke; 210-upper coil; 220-upper coil insulation skeleton; 230-lower coil; 240-lower coil insulation skeleton; 310-an upper clip; 320-middle clamp; 330-lower clamp; 340-pulling a plate in the iron core; 350-transverse locking bolt; 400-a frequency converter; 500-a filter capacitance; 600-air gap.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a magnetic integration three-in-one reactor which comprises an iron core component, a mounting component, a coil component and a filter capacitor C500.
The iron core assembly comprises three upper transverse yokes 110, a middle transverse yoke 120 and a lower transverse yoke 130 which are arranged in parallel, n upper core columns arranged between the upper transverse yoke 110 and the middle transverse yoke 120, and n lower core columns arranged between the middle transverse yoke 120 and the lower transverse yoke 130; when the product is a three-phase reactor, n is 3, the upper core column is specifically an upper left core column 140, an upper middle core column 150 and an upper right core column 160, the lower core column is specifically an lower left core column 170, an lower middle core column 180 and an lower right core column 190, and n is 1 in the case of the single-phase reactor, only one upper core column and one lower core column are provided, and a plurality of air gaps 600 are distributed on each upper core column and each lower core column.
In addition, side yoke cores are arranged on the sides of the upper core column and the lower core column, and are specifically divided into a right upper side yoke 101, a right lower side yoke 102, a left upper side yoke 103 and a left lower side yoke 104, meanwhile, the upper cross yoke 110, the middle cross yoke 120 and the lower cross yoke 130 are extended to be correspondingly connected with the right upper side yoke 101, the right lower side yoke 102, the left upper side yoke 103 and the left lower side yoke 104, when the product is a three-phase reactor, the right upper side yoke 101, the right lower side yoke 102, the left upper side yoke 103 and the left lower side yoke 104 can be arranged on the left side or the right side or arranged on the left side and the right side simultaneously or without the side yokes; in the case of a single-phase reactor, a right upper side return yoke 101, a right lower side return yoke 102, a left upper side return yoke 103, and a left lower side return yoke 104 are provided on the left and right sides of the upper leg and the lower leg.
The mounting assembly comprises an upper clamping piece 310, a middle clamping piece 320, a lower clamping piece 330, an iron core inner pulling plate 340 and a cross locking bolt 350, wherein an upper cross yoke 110 is locked by the front and rear upper clamping pieces 310 and the cross locking bolt 350, a middle cross yoke 120 is locked by the front and rear middle clamping pieces 320 and the cross locking bolt 350, and a lower cross yoke 130 is locked by the front and rear lower clamping pieces 330 and the cross locking bolt 350; the core inner pulling plates 340 are directly connected to the upper cross yoke 110, the upper core column middle cross yokes 120, and the lower core column cross yokes 130, located in front of and behind each core column, clamping the core column, and disposed between the core and the upper clamping member 310, the middle clamping member 320, and the lower clamping member 330.
The coil assembly comprises a first coil L1, a second coil L2 and a third coil L3, wherein the first coil L1 and the second coil L2 are wound on the lower core column, and the third coil L3 is wound on the upper core column; specifically, in three phases, the phase a coils are wound around the upper left core column 140 and the lower left core column 170, the phase B coils are wound around the upper middle core column 150 and the lower middle core column 180, and the phase C coils are wound around the upper right core column 160 and the lower right core column 190; in single phase, the first coil L1, the second coil L2 and the third coil L3 are only wound on the independent upper core column and lower core column; the winding directions of the first coil L1, the second coil L2 and the third coil L3 are the same, wherein the tail end of the first coil L1, the head end of the second coil L2 and the tail end of the third coil L3 are connected in series, the head end of the third coil L3 is connected with the filter capacitor 500, the head end of the first coil L1 is connected with the grid side (the grid end), and the tail end of the second coil L2 is connected with the valve side 400 (such as the input end of the frequency converter).
Further, the lower coil 230 includes a first coil L1 (mesh side) and a second coil L2 (valve side), and is first wound on the lower coil insulation bobbin 240, and the lower coil insulation bobbin 240 is sleeved on the lower stem; the upper coil 210 is a third coil L3 (filter), and is firstly wound on the upper coil insulation framework 220, and the upper coil insulation framework 220 is sleeved on the upper core column;
the fundamental current is taken from the grid side, and is supplied to the valve-side inverter 400 after passing through the valve-side reactance, i.e., the second coil L2, from the grid-side reactance, i.e., the first coil L1, and the other part of the fundamental current forms a reactive loop through the grid-side reactance, i.e., the first coil L1, the filter reactance, i.e., the third coil L3, and the filter capacitor 500, and the harmonic of the valve-side inverter 400 is absorbed and eliminated by the T-type filter.
Wherein the upper cross yoke 110, the upper core column, the middle cross yoke 120, and the associated right side upper side yoke 101 and left side upper side yoke 103 (if any) constitute a magnetic flux loop of the upper core, and the flowing magnetic flux is Φ 1; the middle cross yoke 120, the lower core column, the lower cross yoke 130, and the related right lower side yoke 102 and left lower side yoke 104 (if any) form a magnetic flux loop of the lower core, and the flowing magnetic flux is Φ 2; the middle cross yoke 120 simultaneously flows magnetic flux Φ 1, Φ 2 of the magnetic circuit; the return yoke core (if at all times) provides a path for the zero sequence current of the system.
Specifically, the first coil L1 and the third coil L3 are reversely connected (tail-to-tail), the magnetic flux Φ 1 and Φ 2 of the magnetic circuit in the middle transverse yoke 120 have the same flow direction, and the loss and the core loss are generated by the flux Φ 1 and Φ 2, the fundamental waves Φ 1 and Φ 2 are basically in the same phase (< 90 °), and the loss and the effective value are increased; harmonic current (5 th order, 7 th order, 11 th order, 13 th order and the like) in the middle transverse yoke 120 has the same magnetic path magnetic flux phi 1 and phi 2 flowing directions, and the loss and the core loss are generated, the harmonic waves phi 1 and phi 2 are basically in opposite phases (close to 180 degrees), the loss and the effective value of each harmonic wave are reduced, and the total loss of the middle transverse yoke 120 is reduced. Since the iron core contains both fundamental current and harmonic current, and the iron core mainly generates most loss by harmonic, the iron core loss is greatly reduced after the harmonic magnetic flux is reduced; on the other hand, the stray magnetic flux scattered into the coil after the harmonic magnetic flux of the middle cross yoke 120 is reduced will also be reduced, and the coil loss and the temperature rise will be slightly reduced, which will be further described in the embodiment.
The first coil L1 (net side) and the second coil L2 (valve side) share the lower iron core column, the harmonic content (5 times, 7 times, 11 times, 13 times and the like) of the second coil L2 is far larger than that of the first coil L1, the loss and temperature rise of the lower iron core column and the magnetic flux density value of the lower iron core column are calculated according to the actual condition of the second coil L2, the number of turns of the second coil L2 is obtained firstly, and the number of turns of the first coil L1 is obtained according to the inductance ratio which is equal to the square of the turn ratio.
The implementation case is as follows:
the valve side load is 11KW three-phase frequency converter, and the working frequency is as follows: 50HZ, operating voltage:
fundamental waves and harmonic currents of the grid-side reactor L1, the valve-side reactor L2, and the filter reactor L3 are shown in table 1.
Table 1: (the unit of each current is A, which is an effective value)
Since all the publications are forward connected (head-tail) for the iron-common yoke reactor, i.e. the tail of the coil L1 is connected in series with the head of L3, the tail of L3 is connected with the capacitance; the connection order of L1 and L2 was unchanged. The flux density values of the upper core column and the lower core column of the reactor are listed in table 2, wherein the phase angle still takes the data in table 1 (although the current and the flux have different phases, the angular difference of each current is not changed).
Table 2: (magnetic density represents magnetic flux density of iron core, unit is mT)
Since the middle cross yoke 120 is a common magnetic flux loop and flows through the magnetic flux paths Φ 1 and Φ 2, since L1 and L3 are connected in the normal forward direction (head-tail), the Φ 1 and Φ 2 are opposite in direction, the core loss is generated by the loss difference, and the effective magnetic flux density (loss difference) after the vectors are superimposed is easily obtained by substituting the calculated values according to the respective magnetic flux densities and angles, and is shown in table 3. The unit loss of the core can be easily obtained by substituting the magnetic flux density and frequency of the core into the core loss calculation formula, for example, when the non-oriented silicon steel sheet 35W300 is used, the frequency is 50-1000Hz, and the following formula can be used for calculating P (2.823) f 1.474B 1.794B 10-3 (W/kg), wherein f is the frequency (Hz) and B is the magnetic flux density (T), and the theoretical values of the core loss are also shown in Table 3.
Table 3: (magnetic density represents magnetic flux density of iron core, unit is mT)
Now, the L1 and L3 proposed by the present invention are connected in reverse direction (tail-tail), the direction of Φ 1 is the same as that of Φ 2, the effective flux density (sum of loss) after the vectors are superimposed can be easily obtained by substituting the loss and the generated core loss into calculation according to the respective flux density and angle, and the result is shown in table 4. Using the same calculation method, the theoretical values of core loss are also shown in table 4.
Table 4: (magnetic density represents magnetic flux density of iron core, unit is mT)
As can be seen from the comparison of tables 3 and 4, the transverse yoke loss in the iron core is reduced by about 67% by using the present invention.
In the following, by means of further comparison through experimental methods, the L1 and the L3 are connected in the conventional forward direction, and an 11KW frequency converter is subjected to full-load aging operation until the temperature is stable, and then the temperature of relevant devices is recorded; similarly, L1 and L3 were again reversed using the invention, loaded similarly and the associated temperature recorded. Specific data are shown in table 5 below.
Table 5: (the temperature unit is DEG C, the temperature rise unit is K, K is the measured temperature-ring temperature DEG C.)
From the above table, it can be seen that when the L1 and the L3 proposed by the present invention are reversely connected, the temperature rise of each device is reduced, and especially the temperature of the iron core is reduced more.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides an integrated trinity reactor of magnetism which characterized in that: the iron core assembly comprises an upper cross yoke, a middle cross yoke and a lower cross yoke which are arranged in parallel, an upper core column arranged between the upper cross yoke and the middle cross yoke, and a lower core column arranged between the middle cross yoke and the lower cross yoke, wherein a plurality of air gaps are uniformly arranged on the upper core column and the lower core column; the coil assembly comprises a first coil L1, a second coil L2 and a third coil L3, wherein the first coil L1 and the second coil L2 are wound on a lower core column, the third coil L3 is wound on an upper core column, the tail end of the first coil L1, the head end of the second coil L2 and the tail end of the third coil L3 are connected in series, the head end of the first coil L1 is connected with a power grid, the tail end of the second coil L2 is connected with a valve side, the head end of the third coil L3 is connected with a filter capacitor, fundamental current is taken from the power grid side, part of the fundamental current is supplied to the valve side after flowing through the second coil L2 by the first coil L1, the other part of the fundamental current forms a reactive circuit through the first coil L1, the third coil L3 and the filter capacitor, and harmonic waves on the valve side are absorbed and eliminated through a T-type filter.
2. The integrated trinity reactor of magnetism of claim 1, its characterized in that: the upper transverse yoke, the upper core column and the middle transverse yoke form a magnetic flux loop of the upper iron core, and the flowing magnetic flux is phi 1; the middle transverse yoke, the lower core column and the lower transverse yoke form a magnetic flux loop of the lower iron core, and the flowing magnetic flux is phi 2; the middle transverse yoke simultaneously flows through magnetic flux phi 1 and phi 2 of the magnetic circuit; the first coil L1 is reversely connected with the third coil L3, the flowing directions of magnetic circuit magnetic fluxes phi 1 and phi 2 in the middle transverse yoke are the same, and the loss and the iron core loss are generated, so that when the magnetic circuit magnetic fluxes phi 1 and phi 2 of fundamental current approach to the same phase, the loss and the effective value of fundamental waves are increased; the flow directions of harmonic current magnetic circuit magnetic fluxes phi 1 and phi 2 in the middle transverse yoke are the same, and loss and iron core loss are generated, when the harmonic current magnetic circuit magnetic fluxes phi 1 and phi 2 tend to be in opposite phases, loss and effective values of each sub-harmonic are reduced, harmonic loss is reduced, and total loss of the middle transverse yoke is reduced.
3. The integrated trinity reactor of magnetism of claim 2, its characterized in that: the first coil L1 and the second coil L2 share the lower core column, the harmonic content of the second coil L2 is larger than that of the first coil L1, and the loss and temperature rise of the lower core column and the magnetic flux density value in the lower core column are calculated according to the second coil L2.
4. The integrated trinity reactor of magnetism of claim 1, its characterized in that: side edges of the upper core column and the lower core column are provided with side yoke iron cores, and the upper transverse yoke, the middle transverse yoke and the lower transverse yoke are respectively in butt joint with the side yoke iron cores.
5. The integrated trinity reactor of magnetism of claim 4, its characterized in that: the upper transverse yoke, the upper core column, the middle transverse yoke and the upper part of the side yoke iron core form a magnetic flux loop of the upper iron core, and the flowing magnetic flux is phi 1; the middle transverse yoke, the lower core column, the lower transverse yoke and the lower part of the side yoke iron core form a magnetic flux loop of the lower iron core, and the flowing magnetic flux is phi 2; the middle transverse yoke simultaneously flows through magnetic flux phi 1 and phi 2 of the magnetic circuit; the side yoke iron core is used for providing a passage for the zero sequence current of the system.
6. The integrated trinity reactor of magnetism of claim 1, its characterized in that: the number of the upper core columns arranged between the upper transverse yoke and the middle transverse yoke and the number of the lower core columns arranged between the middle transverse yoke and the lower transverse yoke are three, so that a three-phase reactor is formed.
7. The integrated trinity reactor of magnetism of claim 1, its characterized in that: the upper core column arranged between the upper transverse yoke and the middle transverse yoke and the lower core column arranged between the middle transverse yoke and the lower transverse yoke are both one, so as to form a single-phase reactor.
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