CN110783073B - Magnetic integrated three-in-one reactor - Google Patents
Magnetic integrated three-in-one reactor Download PDFInfo
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- CN110783073B CN110783073B CN201911095938.5A CN201911095938A CN110783073B CN 110783073 B CN110783073 B CN 110783073B CN 201911095938 A CN201911095938 A CN 201911095938A CN 110783073 B CN110783073 B CN 110783073B
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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
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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, and a network side reactance L1, a valve side reactance L2 and a filter reactance L3 are integrated together; in particular, the coils L1 and L3 are connected in reverse directions, the flowing directions of the upper and lower magnetic fluxes phi 1 and phi 2 on the middle transverse yoke are the same, and harmonic wave losses of the upper and lower iron core loops are opposite or close to opposite, so that the harmonic wave magnetic fluxes are added and then offset 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 coil assembly comprises a first coil L1, a second coil L2 and a third coil L3, 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 wave current is taken from the power grid side, one part of the fundamental wave current is supplied to the valve side after flowing through the second coil L2 by the first coil L1, the other part forms a reactive loop 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 fundamental current magnetic circuit magnetic fluxes phi 1 and phi 2 approach to the same phase, the loss and the effective value of the fundamental wave 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 integrated 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 a single-phase reactor.
The magnetic integration three-in-one reactor has the beneficial effects that: the three products of the network side reactance L1, the valve side reactance L2 and the filtering reactance L3 are integrated together, so that the volume, the weight and the cost are reduced, the loss of the whole machine and external connection ends can be reduced, and a better filtering effect is achieved; particularly, the coils L1 and L3 are reversely connected, the flow directions of upper and lower magnetic fluxes phi 1 and phi 2 on the middle transverse yoke are the same, and harmonic losses of upper and lower iron core loops are opposite or close to opposite, so that harmonic magnetic fluxes are added and then offset 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 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 upper return yoke; 104-left lower return yoke; 210-upper coil; 220-upper coil insulation framework; 230-lower coil; 240-lower coil insulation skeleton; 310-an upper clip; 320-middle clamp; 330-lower clamp; 340-core inner pull plate; 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 yokes 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-side left core column 140, an upper-side middle core column 150 and an upper-side right core column 160, the lower core column is specifically a lower-side left core column 170, a lower-side middle core column 180 and a lower-side 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-side upper side yoke 101, a right-side lower side yoke 102, a left-side upper side yoke 103 and a left-side 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-side upper side yoke 101, the right-side lower side yoke 102, the left-side upper side yoke 103 and the left-side lower side yoke 104, and when the product is a three-phase reactor, the right-side upper side yoke 101, the right-side lower side yoke 102, the left-side upper side yoke 103 and the left-side lower side yoke 104 can be arranged on the left side or the right side or arranged on the left and right sides at the same time or do not need 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, 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 on the upper left core column 140 and the lower left core column 170, the phase B coils are wound on the upper middle core column 150 and the lower middle core column 180, and the phase C coils are wound on 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 upper core column and the lower core column which are independent; 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 network side (power 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 (net side) and a second coil L2 (valve side), and is first wound on the lower coil insulation frame 240, and the lower coil insulation frame 240 is sleeved on the lower core column; 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 wave current is taken from the grid side, and the grid side reactance, i.e., the first coil L1, passes through the valve side reactance, i.e., the second coil L2, to supply power to the valve side frequency converter 400, and the other part of the fundamental wave 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 wave of the valve side frequency converter 400 is absorbed and eliminated by the T-type filter.
Wherein the upper transverse yoke 110, the upper core column, the middle transverse yoke 120, and the related right-side upper side yoke 101 and left-side upper side yoke 103 (if any) form a magnetic flux loop of the upper iron 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 of the magnetic circuit in the middle transverse yoke 120 has the same direction as the flow direction of Φ 2, and the loss and the core loss are generated by the flux Φ 1, the fundamental waves Φ 1 and Φ 2 are basically in the same phase (< 90 °), and the loss and the effective value of the fundamental waves Φ 1 and Φ 2 become large; the flux phi 1 and phi 2 of the magnetic circuit of harmonic current (5, 7, 11, 13, etc.) in the middle transverse yoke 120 have the same flowing direction, and the loss and the core loss are generated by the flux phi 1 and the flux phi 2, the harmonic phi 1 and the harmonic phi 2 have basically opposite phases (close to 180 degrees), the loss and the effective value of each harmonic are reduced, and the total loss of the middle transverse yoke 120 is reduced. The iron core not only contains fundamental current but also contains harmonic current, and the iron core mainly generates most loss by harmonic, so that the loss of the iron core 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 greater than that of the first coil L1, the loss and the 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 square of the turn ratio which is equal to the inductance 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:
table 1 shows fundamental waves and harmonic currents of the grid-side reactor L1, the valve-side reactor L2, and the filter reactor L3.
Table 1: (the unit of each time current is A, which is an effective value)
Since all the publications are forward connected (head-tail) for the iron-sharing yoke reactor, namely, the tail of the coil L1 is connected with the head of the coil L3 in series, and the tail of the coil L3 is connected with the capacitor; the connection order of L1 and L2 is not changed. 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)
Because the middle cross yoke 120 is a common magnetic flux loop and flows through the magnetic flux Φ 1 and Φ 2, the 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 superposed can be easily obtained by substituting the respective magnetic flux densities and angles into the calculation, which 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 using the non-oriented silicon steel sheet 35W300, the frequency can be calculated by the following formula when the frequency is 50-1000Hz, P =2.823 f ^ 1.474B ^1.794 x 10^ -3 (W/kg), wherein f is the frequency (Hz), B is the magnetic flux density (T), and the theoretical value of the core loss is also shown in Table 3.
Table 3: (magnetic density represents the magnetic flux density of the iron core, and the unit is mT)
Now, the effective magnetic flux density (sum of losses) after the vectors are superposed is easily obtained by substituting the losses and the generated core losses of the L1 and the L3 which are provided by the invention in the calculation according to the respective magnetic flux density and angle by adopting the reverse connection (tail-tail) and the same direction of phi 1 and phi 2, and is shown in the table 4. Using the same calculation method, the theoretical values of core loss are also shown in table 4.
Table 4: (magnetic density represents the magnetic flux density of the iron core, and the 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.
The following is compared by an experimental method, the L1 and the L3 are connected in a conventional forward direction, and an 11KW frequency converter is aged under full load until the temperature is stable, and then the temperature of a relevant device is recorded; similarly, L1 and L3 were again connected in reverse using the present invention, with the same load and the associated temperature recorded. Specific data are shown in table 5 below.
Table 5: (temperature in degrees Celsius, temperature rise in degrees K, K = measured temperature-ring temperature degree Celsius.)
From the above table, it can be seen that when the reverse connection of L1 and L3 provided by the present invention is adopted, 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 a trinity reactor of magnetism integration 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, 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 winding directions of the first coil L1 and the third coil L3 are the same, 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 wave current is taken from the power grid side, one part of the fundamental wave current is supplied to the valve side after flowing through the second coil L2 by the first coil L1, the other part forms a reactive loop 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 and the third coil L3 are reversely connected, the flux directions of magnetic circuit flux phi 1 and phi 2 in the middle transverse yoke are the same, the iron core loss is generated by the vector sum of the flux directions, and when the fundamental current magnetic circuit flux phi 1 and the flux phi 2 approach to the same phase, the vector sum effective value of the fundamental wave is increased; the flux phi 1 and the flux phi 2 of the harmonic current magnetic circuit in the middle transverse yoke have the same flowing direction, the iron core loss is generated by the vector sum of the flux phi 1 and the flux phi 2, when the harmonic current magnetic circuit flux phi 1 and the flux phi 2 tend to be in opposite phases, the vector sum effective value of each harmonic becomes small, the harmonic loss is reduced, and the total loss of the middle transverse yoke becomes small.
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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