CN216212657U - Three-frame split type triple-frequency transformer - Google Patents
Three-frame split type triple-frequency transformer Download PDFInfo
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- CN216212657U CN216212657U CN202121746467.2U CN202121746467U CN216212657U CN 216212657 U CN216212657 U CN 216212657U CN 202121746467 U CN202121746467 U CN 202121746467U CN 216212657 U CN216212657 U CN 216212657U
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Abstract
The application relates to a three-frame split type triple-frequency transformer, which comprises a first sub-frame iron core, a second sub-frame iron core and a third sub-frame iron core; the six primary windings are connected and then connected to a three-phase end, the six secondary windings are connected and then connected to a single-phase end, the voltage frequency of the single-phase end is three times of that of the three-phase end, the connection mode of the primary windings is not required to be limited, the situation that each frame iron core works in a high saturation state is avoided, the triple frequency voltage output of the secondary windings is realized, the exciting current is small, and the efficiency is higher.
Description
Technical Field
The application relates to the technical field of transformers, in particular to a three-frame split type triple-frequency transformer.
Background
The frequency tripling transformer utilizes the non-linear and saturated characteristics of ferromagnetic material and special connection of windings, so that the transformer can generate rich third harmonic, and the third harmonic can be used to form frequency tripling voltage. The ferromagnetic frequency tripling transformer is widely applied to testing of devices such as transformers and voltage transformers and frequency division power transmission systems.
In order to realize a frequency tripling transformer in the prior art, three single-phase transformers with equal magnetic circuit lengths are mostly adopted, a primary winding is in star connection, a secondary winding is in open triangle connection, and the problems of large exciting current, low efficiency and the like exist when an iron core runs in a highly saturated state.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a three-frame split type frequency tripling transformer for solving the problems of large exciting current and low efficiency of the existing frequency tripling transformer.
A three-frame split type frequency tripling transformer, comprising: an iron core and a winding; the iron core comprises a first sub-frame iron core, a second sub-frame iron core and a third sub-frame iron core; the winding includes six primary windings and six secondary windings, the primary winding with two liang of secondary windings be a set of respectively with the core twine in first divide the frame iron core, the second divide the frame iron core with the third divides on the stand that the frame iron core is relative, six be connected to the three-phase end after the primary winding links to each other, six secondary windings are connected to the single-phase end after linking to each other, the frequency of the voltage of single-phase end is three times the frequency of the voltage of three-phase end.
In one embodiment, the first split-frame iron core, the second split-frame iron core and the third split-frame iron core are rectangular split-frame iron cores with equal areas.
In one embodiment, the first split-frame iron core, the second split-frame iron core and the third split-frame iron core are roll iron cores or stacked iron cores.
In one embodiment, the first sub-frame iron core, the second sub-frame iron core and the third sub-frame iron core are disposed in the same oil tank or disposed in three independent oil tanks respectively.
In one embodiment, six secondary windings are arranged outside the six primary windings.
In one embodiment, the six primary windings are connected in series in pairs with different phases and opposite polarities to form three groups, and then connected in a Y connection mode, a D connection mode or an YN connection mode.
In one embodiment, six primary windings are wound on the iron core in the same winding direction.
In one embodiment, the six secondary windings are connected in parallel in the same polarity and then connected in an open triangle connection mode.
In one embodiment, six secondary windings are wound on the iron core in the same winding direction.
In one embodiment, the transformer further comprises six voltage regulating windings, the six voltage regulating windings are respectively connected with the six secondary windings, and the six voltage regulating windings are also wound on left and right stand columns of the first sub-frame iron core, the second sub-frame iron core and the third sub-frame iron core in the same core mode.
Above-mentioned three split type triple frequency transformers of frame, the iron core includes three sub-frame iron core, six primary windings and six secondary windings are two liang as a set of and twine on three sub-frame iron core relative stand with the core respectively, six primary windings are connected to the three-phase end after linking to each other, six secondary windings are connected to the single-phase end after linking to each other, need not to prescribe a limit to the connection mode of primary winding, avoid each sub-frame iron core work in high saturated condition, realized secondary winding's triple frequency voltage output, and exciting current is little, efficiency is higher.
Drawings
Fig. 1 is a structural diagram of a three-frame split type frequency tripling transformer in an embodiment;
FIG. 2 is a wiring diagram of six primary windings in one embodiment;
FIG. 3 is a wiring diagram of six primary windings in another embodiment;
FIG. 4 is a wiring diagram of six primary windings in another embodiment;
fig. 5 is a wiring diagram of six secondary windings in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
In an embodiment, as shown in fig. 1, a three-frame split type frequency tripling transformer is provided, which is applied to a test of a transformer and a voltage transformer and other devices and a frequency division power transmission system, and includes: an iron core and a winding; the iron core comprises a first sub-frame iron core 11, a second sub-frame iron core 12 and a third sub-frame iron core 13; the winding comprises six primary windings (21, 22, 23, 24, 25, 26) and six secondary windings (31, 32, 33, 34, 35, 36), wherein the primary windings and the secondary windings are grouped into a group in pairs, the groups are respectively wound on the upright columns of the first split-frame iron core 11, the second split-frame iron core 12 and the third split-frame iron core 13 in a concentric mode, the six primary windings (21, 22, 23, 24, 25, 26) are connected and then connected to a three-phase end, the six secondary windings (31, 32, 33, 34, 35, 36) are connected and then connected to a single-phase end, and the voltage frequency of the single-phase end is three times that of the three-phase end.
Specifically, the iron core includes a first sub-frame iron core 11, a second sub-frame iron core 12 and a third sub-frame iron core 13, and the first sub-frame iron core 11, the second sub-frame iron core 12 and the third sub-frame iron core are three quadrilateral sub-frame iron cores surrounded by an upper transverse yoke, a lower transverse yoke, a left upright post and a right upright post. Optionally, the width of the transverse yoke of each frame iron core may be equal to the length of the upright post of each frame iron core, the width of the transverse yoke of each frame iron core may also be smaller than the length of the upright post of each frame iron core, and the width of the transverse yoke of each frame iron core may also be larger than the length of the upright post of each frame iron core, which is not limited herein.
Further, the windings include six primary windings connected to the three-phase power grid terminal and six secondary windings connected to the single-phase terminal, wherein three-phase terminals connected to the six primary windings may serve as both power input terminals and power output terminals, and correspondingly, single-phase terminals connected to the six secondary windings may serve as both power input terminals and power output terminals. It can be understood that, under the condition that the turn ratio of six primary windings and six secondary windings is fixed, the frequency tripling transformer can be used as a step-down transformer and also can be used as a step-up transformer. Specifically, the six primary windings include the primary windings 21 and 22 wound on the first split frame core, the primary windings 23 and 24 wound on the second split frame core, and the primary windings 25 and 26 wound on the third split frame core, and the six secondary windings include the secondary windings 31 and 32 wound on the first split frame core, the secondary windings 33 and 34 wound on the second split frame core, and the secondary windings 35 and 36 wound on the third split frame core.
The primary winding 21 is wound on the left column of the first sub-frame iron core, the primary winding 22 is wound on the right column of the first sub-frame iron core, the primary winding 23 is wound on the left column of the second sub-frame iron core, the primary winding 24 is wound on the right column of the second sub-frame iron core, the primary winding 25 is wound on the left column of the third sub-frame iron core, and the primary winding 26 is wound on the right column of the third sub-frame iron core. In addition, the number of turns of each primary winding wound on the frame iron core is the same, and the adopted materials are also the same. Alternatively, the material may be copper foil, electromagnetic wire, or the like, which is not limited to this.
In addition, each secondary winding and the primary winding are wound on the stand column of the same frame iron core in the same core mode, optionally, the secondary winding can be wound on the outer side of the primary winding in an overlapping mode, the primary winding can be wound on the outer side of the secondary winding in an overlapping mode, and the primary winding and the secondary winding which are not overlapped can be wound on the stand column of the same frame iron core in the same up-down core mode. Optionally, in further embodiments, electrical isolation between the primary winding and the winding may also be achieved using insulating paper, insulating oil, or epoxy. The following explanation is given by taking the example that the secondary winding is wound around the outside of the primary winding in the same core, the secondary winding 31 is wound around the outside of the primary winding 21 on the left column of the first sub-frame iron core in the same core, the secondary winding 32 is wound around the outside of the primary winding 22 on the right column of the first sub-frame iron core in the same core, the secondary winding 33 is wound around the outside of the primary winding 23 on the left column of the second sub-frame iron core in the same core, the secondary winding 34 is wound around the outside of the primary winding 24 on the right column of the second sub-frame iron core in the same core, the secondary winding 35 is wound around the outside of the primary winding 25 on the left column of the third sub-frame iron core in the same core, and the secondary winding 36 is wound around the outside of the primary winding 26 on the right column of the third sub-frame iron core in the same core. In addition, the number of turns of each secondary winding wound on the frame iron core is the same, and the adopted materials are also the same. Alternatively, the material may be copper foil, electromagnetic wire, or the like, which is not limited to this.
The working principle of the three-frame split frequency tripling transformer shown in fig. 1 is explained as an example. Assuming that a primary winding is wound on each of the legs of the frame iron core, a secondary winding is wound on the outer side of the primary winding, assuming that the primary winding 21 wound on the leg of the first frame iron core is HVA1, the primary winding 22 is HVA2, the secondary winding 31 is LVA1, the secondary winding 32 is LVA2, the primary winding 23 wound on the leg of the second frame iron core is HVB1, the primary winding 24 is HVB2, the secondary winding 33 is LVB1, the secondary winding 34 is LVB2, the primary winding 25 wound on the leg of the third frame iron core is HVC1, the primary winding 26 is HVC2, the secondary winding 35 is LVC1, and the secondary winding 36 is LVC 2. The induced voltages generated by the primary winding HVA1 and the primary winding HVA2 are set as uHVAThe induced voltages generated by the primary winding HVB1 and the primary winding HVB2 are set as uHVBThe induced voltages generated by the primary winding HVC1 and the primary winding HVC2 are set as uHVCSimilarly, u represents the induced voltage generated by secondary winding LVA1 and secondary winding LVA2LVAThe induced voltages generated by the secondary winding LVB1 and the secondary winding LVB2 are set as uLVBThe induced voltages generated by the secondary winding LVC1 and the secondary winding LVC2 are set as uLVC。
Assuming that the primary winding is connected in YN mode, the voltage u of the head end of the primary winding to the groundSA、uSBAnd uSCRespectively as follows:
dividing by the number of turns n of its primary winding according to equation (1)1And the equation still exists, then:
wherein u isHVA/n1、uHVB/n1、uHVC/n1Respectively, the induced voltage of the magnetic flux passing through the three frame iron cores. In a linear system, uHVA/n1、uHVB/n1、uHVC/n1All contain only three-phase fundamental wave components, but the ferromagnetic materials adopted by the sub-frame iron cores have the nonlinear characteristic of uHVA/n1、uHVB/n1、uHVC/n1Meanwhile, the harmonic filter also comprises zero-sequence odd harmonic components such as 3, 9, 15 … and the like, and the third harmonic component is mainly used, and other higher harmonics can be ignored. Assuming a magnetic flux phi passing through each of the sub-frame coresa(t)、φb(t) and phic(t) are respectively:
φa(t)＝φmsin(ωt)+kφmsin(3ωt+θ) (3)
wherein phi ismFor the magnetic flux phi passing through each sub-frame corea(t)、φb(t) and phic(t) the amplitude of the fundamental flux, omega is the angular frequency, theta is the initial phase angle; in addition, k is a magnetic flux φ passing through each of the frame coresa(t)、φb(t) and phic(t) the content of 3 th harmonic.
Then, due toThe secondary windings adopt an open triangle connection mode, and are connected with the induction voltage u output by the single-phase power supply end of the six secondary windings2Equal to the derivative of the sum of the flux linkages through the six secondary windings, i.e. according to equations (3), (4) and (5):
in the formula, n2Six secondary winding turns.
Then, as the fundamental waves of the three phases in each frame iron core can be mutually offset, the following results can be obtained:
u2＝3kφmn2dsin(3ωt+θ)/dt (7)
the derivation of equation (7) can be:
u2＝9kφmn2cos(3ωt+θ) (8)
from the equation (8), the induced voltage u across the six secondary windings2The frequency of the transformer is three times of the frequency of the voltage at the two ends of the primary winding, and the frequency tripling transformer is realized.
Above-mentioned three split type triple frequency transformers of frame, the iron core includes three sub-frame iron core, six primary windings and six secondary windings are two liang as a set of and twine on three sub-frame iron core relative stand with the core respectively, six primary windings are connected to the three-phase end after linking to each other, six secondary windings are connected to the single-phase end after linking to each other, need not to prescribe a limit to the connection mode of primary winding, avoid each sub-frame iron core work in high saturated condition, realized secondary winding's triple frequency voltage output, and exciting current is little, efficiency is higher.
In one embodiment, as shown in fig. 1, the first, second, and third split- frame cores 11, 12, and 13 are rectangular split-frame cores having equal areas.
Specifically, the widths of the transverse yokes of the first sub-frame iron core 11, the second sub-frame iron core 12, and the third sub-frame iron core 13 are all greater than the lengths of the vertical columns thereof, and the included angles between the transverse yokes of the first sub-frame iron core 11, the second sub-frame iron core 12, and the third sub-frame iron core 13 and the vertical columns thereof are all right angles, that is, the first sub-frame iron core 11, the second sub-frame iron core 12, and the third sub-frame iron core 13 are rectangular sub-frame iron cores.
Further, since the widths of the upper and lower horizontal yokes of the first, second, and third split- frame cores 11, 12, and 13 are all equal, and the lengths of the left and right columns of the first, second, and third split- frame cores 11, 12, and 13 are also all equal, the areas enclosed by the upper and lower horizontal yokes and the left and right columns of the first, second, and third split- frame cores 11, 12, and 13, respectively, are all equal.
In the embodiment, each frame iron core can not continuously work in a high saturation state during working, so that the efficiency of the frequency tripling transformer is improved.
In one embodiment, as shown in fig. 1, the first, second, and third split- frame cores 11, 12, and 13 are wound cores or stacked cores.
Specifically, each of the framed cores may be formed by winding an iron core strip by an iron core winding machine and then annealing the iron core strip, or may be formed by stacking a plurality of iron core pieces and seamlessly and tightly closing the iron core pieces by a clamping device. The iron core strip and the iron core sheet can be made of different materials, such as ferrite, amorphous alloy, ultrathin silicon steel or nanocrystalline and other magnetic materials. In this embodiment, the sub-frame iron core made of the non-linear ferromagnetic material can generate rich zero-sequence harmonic flux between sub-frames.
In one embodiment, as shown in fig. 1, the first split-frame iron core 11, the second split-frame iron core 12 and the third split-frame iron core 13 are disposed in the same oil tank or disposed in three separate oil tanks respectively. Specifically, because three frame iron cores are connected only through wiring among the windings, when the three frame iron cores are stored in insulating oil to realize cooling and insulation, the three frame iron cores can be selectively arranged in the same oil tank, the space is saved, and the three frame iron cores can also be selectively arranged in three independent oil tanks respectively, so that the volume of a single-phase product is reduced.
In one embodiment, as shown in fig. 1, six secondary windings (31, 32, 33, 34, 35, 36) are disposed outside of the six primary windings (21, 22, 23, 24, 25, 26).
Specifically, each secondary winding and the primary winding are wound on the same column of the frame iron core in the same core mode, the secondary winding is arranged on the outer side of the primary winding, the secondary winding 31 is wound on the outer side of the primary winding 21 on the left column of the first frame iron core in the same core mode, the secondary winding 32 is wound on the outer side of the primary winding 22 on the right column of the first frame iron core in the same core mode, the secondary winding 33 is wound on the outer side of the primary winding 23 on the left column of the second frame iron core in the same core mode, the secondary winding 34 is wound on the outer side of the primary winding 24 on the right column of the second frame iron core in the same core mode, the secondary winding 35 is wound on the outer side of the primary winding 25 on the left column of the third frame iron core in the same core mode, and the secondary winding 36 is wound on the outer side of the primary winding 26 on the right column of the third frame iron core in the same core mode.
In the embodiment, the secondary windings are arranged on the outer sides of the primary windings in a concentric manner, so that the coupling coefficient between the primary windings and the secondary windings is increased, the leakage reactance between the primary windings and the secondary windings of the transformer is effectively reduced, and the efficiency of the transformer is improved.
In one embodiment, as shown in fig. 2, 3 and 4, six primary windings are connected in series with opposite polarities in pairs to form three groups, and then connected in a Y connection, a D connection or an YN connection manner.
Specifically, the six primary windings include a primary winding HVA1, a primary winding HVA2 wound around the left and right legs of the first sub-frame core, a primary winding HVB1, a primary winding HVB2 wound around the left and right legs of the second sub-frame core, a primary winding HVC1, a primary winding HVC2 wound around the left and right legs of the third sub-frame core. After the six primary windings are connected in series in pairs in an out-phase and reverse polarity mode to form three groups, the six primary windings are connected to a three-phase power grid end in a non-unique mode, and Y connection, D connection or YN connection can be adopted.
The two primary windings of the adjacent frame iron cores are connected in series in opposite phases and polarities, the tail end of the primary winding HVA1 and the tail end of the primary winding HVB1 are connected in series to form a group, the tail end of the primary winding HVC1 and the tail end of the primary winding HVA2 are connected in series to form a group, and the tail end of the primary winding HVB2 and the tail end of the primary winding HVC2 are connected in series to form a group.
Further, as shown in fig. 2, three groups of primary windings connected in series are connected to a three-phase power grid end in a Y-type connection mode, the head end of the primary winding HVA1, the head end of the primary winding HVC1 and the head end of the primary winding HVB2 are connected with three terminals of a three-phase power supply, and the head end of the primary winding HVB1, the head end of the primary winding HVA2 and the head end of the primary winding HVC2 are connected to the same point. As shown in fig. 3, three sets of primary windings connected in series are connected to a three-phase grid terminal by an YN type connection, the head end of the primary winding HVA1, the head end of the primary winding HVC1 and the head end of the primary winding HVB2 are connected to three terminals of the three-phase grid, and the head end of the primary winding HVB1, the head end of the primary winding HVA2 and the head end of the primary winding HVC2 are connected to the same point and then grounded through the point. As shown in fig. 4, three groups of primary windings connected in series are connected to a three-phase power grid terminal by adopting a D-type connection mode, the head end of the primary winding HVA1, the head end of the primary winding HVC1 and the head end of the primary winding HVB2 are connected with three terminals of the three-phase power grid, the head end of the primary winding HVB1 is connected with the head end of the primary winding HVB2, the head end of the primary winding HVA2 is connected with the head end of the primary winding HVA1, and the head end of the primary winding HVC2 is connected with the head end of the primary winding HVC 1.
In the embodiment, the problem that the connection form of the primary winding of the existing ferromagnetic frequency tripling transformer is single is solved.
In one embodiment, as shown in fig. 2, 3 and 4, the six primary windings are wound in the same direction on the core.
Specifically, when energized, the winding coil electromotive force phasors have a phase difference therebetween, thereby generating a magnetic flux on the core. Therefore, the six primary windings are wound on the frame iron core in the same winding direction, the head ends of the six primary windings are marked by dots in fig. 2, fig. 3 and fig. 4, the tail ends are the ends without the dots, and three-phase power is input from the head ends of the six primary windings, namely the head ends of the six primary windings are all end points with positive electromotive force, namely the ends with the same name.
In this embodiment, through the same winding direction and the arrangement of the ends with the same name, and the phase difference of the three-phase power source is 120 °, the three-phase fundamental waves in each frame iron core can be offset.
In one embodiment, as shown in fig. 5, the six secondary windings are connected in parallel with each other in the same polarity and then connected in an open delta connection manner.
Specifically, the six secondary windings include a secondary winding LVA1 and a secondary winding LVA2 wound around the left and right legs of the first split-frame core, a secondary winding LVB1 and a secondary winding LVB2 wound around the left and right legs of the second split-frame core, and a secondary winding LVC1 and a secondary winding LVC2 wound around the left and right legs of the third split-frame core. After the six secondary windings are connected in parallel with each other in the same polarity in pairs to form three groups, the six secondary windings are connected in an open triangle mode and are connected to a single-phase end.
As shown in fig. 5, secondary winding LVA1 is connected in parallel with secondary winding LVA2 in the same polarity, secondary winding LVB1 is connected in parallel with secondary winding LVB2 in the same polarity, secondary winding LVC1 is connected in parallel with secondary winding LVC2 in the same polarity, the tail end of secondary winding LVA1 connected to secondary winding LVA2 is connected to the head end of secondary winding LVB1 connected to secondary winding LVB2, the tail end of secondary winding LVB1 connected to secondary winding LVB2 is connected to the head end of secondary winding LVC1 connected to secondary winding LVC2, and the head end of secondary winding LVA1 connected to secondary winding LVA2 is connected to the tail end of secondary winding LVC1 connected to secondary winding LVC 2.
In one embodiment, as shown in fig. 5, the six secondary windings are wound in the same direction on the core. Specifically, the six secondary windings are wound on the frame iron core in the same winding direction, and the dots are marked as end points, i.e., dotted ends, where the electromotive force of each secondary winding is positive, in fig. 5. In this embodiment, through the same winding direction and the arrangement of the ends with the same name, and the phase difference of the three-phase power source is 120 °, the three-phase fundamental waves in each frame iron core can be offset.
In one embodiment, the three-frame split type frequency tripling transformer further includes six voltage regulating windings, the six voltage regulating windings are respectively connected with the six secondary windings, and the six voltage regulating windings are also wound on the left and right stand columns of the first sub-frame iron core, the second sub-frame iron core and the third sub-frame iron core in the same core mode.
Specifically, the six voltage regulating windings are respectively and correspondingly connected with one secondary winding in series, so that the number of turns of the secondary side winding of the frequency tripling transformer is changed. When the voltage regulating winding and the secondary winding are wound in the same polarity and the same direction, the purpose of increasing the number of turns of the secondary winding can be achieved, and when the voltage regulating winding and the secondary winding are wound in the opposite direction, the purpose of reducing the number of turns of the secondary winding can be achieved.
Furthermore, the six voltage regulating windings are wound on the left and right columns of each frame iron core, and may be disposed outside the first winding and the second winding, or between the first winding and the second winding, or disposed inside the first winding and the second winding, and close to the iron core, but not limited thereto.
In this embodiment, the voltage regulating winding is added to increase or decrease the magnetic flux in the frame iron core of the frequency tripling transformer, so as to generate the effect of adjusting the secondary output voltage.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a split type triple frequency transformer of three frames which characterized in that includes: an iron core and a winding; the iron core comprises a first sub-frame iron core, a second sub-frame iron core and a third sub-frame iron core; the winding includes six primary windings and six secondary windings, the primary winding with two liang of secondary windings be a set of respectively with the core twine in first divide the frame iron core, the second divide the frame iron core with the third divides on the stand that the frame iron core is relative, six be connected to three looks ends after the primary winding links to each other, six be connected to single-phase end after the secondary winding links to each other, the voltage frequency of single-phase end is three times the voltage frequency of three looks ends.
2. The three-frame split type frequency tripling transformer according to claim 1, wherein the first, second and third split-frame cores are rectangular split-frame cores with equal areas.
3. The split type frequency tripling transformer of claim 2, wherein the first, second and third split-frame cores are wound cores or stacked cores.
4. The three-frame split type frequency tripling transformer according to claim 3, wherein the first, second and third split-frame cores are disposed in the same oil tank or in three separate oil tanks, respectively.
5. The three-frame split frequency tripling transformer according to claim 1, wherein six secondary windings are disposed outside the six primary windings.
6. The three-frame split-type frequency tripling transformer according to claim 5, wherein six primary windings are connected in series after being out-of-phase and reversed-polarity in pairs into three groups, and are connected in a Y connection, D connection or YN connection manner.
7. The three-frame split frequency tripling transformer according to claim 6, wherein six primary windings are wound in the same direction on the iron core.
8. The three-frame split type frequency tripling transformer according to claim 7, wherein the six secondary windings are connected in parallel with each other in the same polarity and then connected in an open delta connection manner.
9. The three-frame split frequency tripling transformer according to claim 8, wherein six secondary windings are wound in the same direction on the iron core.
10. The three-frame split type frequency tripling transformer according to any one of claims 1 to 9, further comprising six voltage regulating windings, wherein the six voltage regulating windings are respectively connected with the six secondary windings, and the six voltage regulating windings are also wound on left and right columns of the first, second and third split frame cores in the same core.
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| CN202121746467.2U CN216212657U (en) | 2021-07-29 | 2021-07-29 | Three-frame split type triple-frequency transformer |
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