CN205039063U - Three -phase cake formula contravariant transformer of balanced leakage inductance - Google Patents
Three -phase cake formula contravariant transformer of balanced leakage inductance Download PDFInfo
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- CN205039063U CN205039063U CN201520707918.XU CN201520707918U CN205039063U CN 205039063 U CN205039063 U CN 205039063U CN 201520707918 U CN201520707918 U CN 201520707918U CN 205039063 U CN205039063 U CN 205039063U
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Abstract
The utility model discloses a three -phase cake formula contravariant transformer of balanced leakage inductance, the linear motor mover comprises an iron core, the iron core includes two parallel arrangement's mounting and first stem stem, second stem stem and the third stem stem of setting between two mountings, and the setting is arranged in proper order to three stem stem, and first stem stem and third stem stem set up in second stem stem both sides, all be provided with primary and secondary coil on first stem stem, second stem stem and the third stem stem, form ABC three -phase transformer, be provided with the first magnetic leakage piece of compensation A looks leakage inductance between the primary of first stem stem and the secondary coil, first magnetic leakage piece sets up in the first stem stem outside, be provided with the second magnetic leakage piece of compensation C looks leakage inductance between the primary of third stem stem and the secondary coil, second magnetic leakage piece sets up in the third stem stem outside. The utility model discloses a set up the magnetic shunt in the both sides of A, the double -phase magnetic leakage of C group, the low B looks leakage inductance volume that disappears surpasss partly to it is balanced to make three stem stem cake formula contravariant transformer three -phases of three -phase output leakage inductance.
Description
Technical field
The utility model relates to field transformer, in particular a kind of three-phase cake formula contravariant transformer balancing leakage inductance.
Background technology
Inverter is widely used in industry-by-industry, comprises electric power, communication, industrial equipment, satellite communication equipment, military vehicle-mounted, ambulance, police car, boats and ships, solar energy and wind power generation field etc.Inversion is that direct current is converted to alternating current, usual employing PWM pulse modulation technology, owing to inversion output waveform existing corresponding carrier wave (triangular wave or sawtooth waveforms), and user is it is desirable that pure sine wave (or other waveform), therefore, all be provided with LC filter circuit by carrier wave filtering in the inverter circuit rear end of various inverter, then become required magnitude of voltage by transformer.Traditional LC filter circuit adopts independently inductance and capacitor combination to form, and also exists by the set of inductance part to the technical scheme (i.e. contravariant transformer) in isolating transformer, thus eliminate independent reactor.
In prior art, transformer device structure due to disc coil structure carries leakage inductance, without the need to arranging secondary iron core, being convenient to many merits such as dispelling the heat, volume is little, with low cost, cake formula transformer is applied to Single-Phase Inverter Source by wide model, such as, in the Single-phase UPS of 2KVA-60KVA.But substantially there is not in the industry the three-phase inversion transformer device structure adopting three-phase cake formula transformer to make, trace it to its cause, mainly during three-phase three stem stem transformer employing cake formula structure, its three-phase leakage inductance amount is inconsistent, the degree of balance exceeds more than 10%, the voltage that three-phase is exported is inconsistent, and product stability is very poor.This defect is that because the length of magnetic path of the three-phase of three stem stem iron cores of three-phase cake formula transformer is different, no matter mesophase spherule is that open inductance or short circuit leakage inductance are all greater than left and right two-phase by the structures shape of three-phase cake formula transformer.Therefore, when needing in the industry the three-phase inversion transformer using cake formula structure, three single-phase transformers can only be adopted to substitute, and a three-phase transformer can not be used.
Therefore, prior art has yet to be improved and developed.
Utility model content
The purpose of this utility model is to provide a kind of three-phase cake formula contravariant transformer balancing leakage inductance, is intended to solve the technical problem that the three-phase leakage inductance amount of three-phase cake formula contravariant transformer is inconsistent.
Find after deliberation, for three stem stem ABC three-phase transformer structures, the length of magnetic path due to the second stem stem (center pinch) B phase is less than the length of magnetic path of the first stem stem and the 3rd stem stem (two side columns) AC phase, according to inductance formula L=(4 π μ N
2a)/Lc is known, and L is larger for length of magnetic path Lc shorter then inductance value, and this structure causes B phase no matter to be that open inductance or short circuit leakage inductance all can be greater than AC phase.When three stem stem ABC three-phase transformer structures adopt disc coil structure, because disc coil structure is high impedance structures, this kind of phenomenon quite outstanding (namely no matter B phase is that open inductance or short circuit leakage inductance all can much larger than AC phases), even the three-phase leakage inductance degree of balance can exceed 10%.When utilizing this three-phase disc coil transformer to use as contravariant transformer, because inversion output utilizes transformer leakage inductance and external capacitor to form LC filter circuit, when electric capacity C is definite value, three-phase leakage inductance L differs comparatively large, and cause three-phase output waveform inconsistent, the harmonic content that each phase exports is not identical yet, especially when transformer belt nonlinear load, this defect is excellent is outstanding, causes three-phase output loading voltage magnitude to differ comparatively large, cannot meet the instructions for use of contravariant transformer.
In order to balance the leakage inductance of ABC three-phase, the utility model proposes the arranged outside magnetic shunt in A phase and C phase leakage field group, this magnetic shunt is the leakage inductance for compensating A phase and C phase, concrete technical scheme is as follows: a kind of three-phase cake formula contravariant transformer balancing leakage inductance, wherein, comprise iron core, described iron core comprises two fixtures be arranged in parallel and is arranged on the first stem stem, the second stem stem and the 3rd stem stem between two fixtures, three stem stems are arranged in order setting, and the first stem stem and the 3rd stem stem are arranged on the second stem stem both sides; Described first stem stem, the second stem stem and the 3rd stem stem are provided with at least one primary coil and secondary coil, form ABC three-phase transformer;
Be provided with the first leakage field sheet compensating A phase leakage inductance between the primary coil of described first stem stem and secondary coil, described first leakage field sheet is arranged on outside the first stem stem;
Be provided with the second leakage field sheet compensating C phase leakage inductance between the primary coil of described 3rd stem stem and secondary coil, described second leakage field sheet is arranged on outside the 3rd stem stem;
Also comprise insulating part, described insulating part be arranged on inside the first stem stem, inside the second stem stem both sides and the 3rd stem stem, between the primary coil being placed in each stem stem and fixture, between primary coil and secondary coil and between secondary coil and fixture.
In practical application, the first leakage field sheet and the second leakage field sheet are provided with insulating outer layer.
In practical application, described first leakage field sheet and the second leakage field sheet are silicon steel part or iron silicon member.
The beneficial effects of the utility model: the utility model discloses a kind of three-phase cake formula contravariant transformer balancing leakage inductance, by arranging magnetic shunt in the both sides of A, C two-phase leakage field group, its the low B of disappearing phase leakage inductance amount is made to exceed part, thus make three-phase three stem stem cake formula contravariant transformer three-phase export leakage inductance balance, the three-phase cake formula transformer of low cost can be applied in the three phase inverter system of high stability, realize three-phase voltage, current balance type exports.
Accompanying drawing explanation
Fig. 1 is the structural representation of the three-phase cake formula contravariant transformer of balance leakage inductance.
Fig. 2 is the structural representation often mutually with the three-phase cake formula contravariant transformer of the balance leakage inductance of two leakage field groups.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, clearly, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Embodiment 1
Present embodiment discloses a kind of three-phase cake formula contravariant transformer balancing leakage inductance, as shown in Figure 1, comprise iron core 100, this iron core 100 comprises two fixtures be arranged in parallel 140 and the first stem stem 110, second stem stem 120 of being arranged between two fixtures 140 and the 3rd stem stem 130, three stem stems are arranged in order setting, and the first stem stem 110 and the 3rd stem stem 130 are arranged on the second stem stem 120 both sides; First stem stem 110, second stem stem 120 and the 3rd stem stem 130 are provided with primary coil 200 and secondary coil 300, form ABC three-phase transformer (from left to right corresponding to A phase, B phase and C phase respectively in Fig. 1).Suppose that ABC three-phase leakage inductance is respectively La, Lb, Lc, magnetic structure according to the iron core 100 of three stem stems: Lb > La=Lc, in order to make ABC three-phase leakage inductance consistent, the present embodiment arranges magnetic shunt in the both sides of A, C two-phase leakage field group, makes its low B of disappearing phase leakage inductance amount exceed part.
Concrete, the the first leakage field sheet 410 compensating A phase leakage inductance is provided with between the primary coil 200 of the first stem stem 110 and secondary coil 300, this the first leakage field sheet 410 is arranged on outside the first stem stem 110 (specifically see Fig. 1), the first leakage field sheet 410 form compensate A phase leakage inductance magnetic shunt structure; Meanwhile, be provided with the second leakage field sheet 420, the second leakage field sheet 420 compensating C phase leakage inductance between the primary coil 200 of the 3rd stem stem 130 and secondary coil 300 and be arranged on outside the 3rd stem stem 130, the second leakage field sheet 420 form compensate C phase leakage inductance magnetic shunt structure.Be separately positioned on outside the first stem stem 110 due to the first leakage field sheet 410 and the second leakage field sheet 420 and (iron core 100 can not be arranged on inner, otherwise can compensate B phase leakage inductance simultaneously) outside the 3rd stem stem 130, therefore can't have any impact to B phase.
In order to ensure the stability of magnetic shunt and even whole contravariant transformer structure further, the three-phase cake formula contravariant transformer of the balance leakage inductance in the present embodiment also comprises insulating part 500, this insulating part 500 is arranged on inside the first stem stem 110, inside the second stem stem 120 both sides and the 3rd stem stem 130, be placed between the primary coil 200 of each stem stem and fixture 140, between primary coil 200 and secondary coil 300 and between secondary coil 300 and fixture 140.
In practical application, in order to ensure the stability of magnetic shunt and even whole contravariant transformer structure further, the first leakage field sheet 410 and the second leakage field sheet 420 are provided with insulating outer layer.
In practical application, the first leakage field sheet 410 and the second leakage field sheet 420 are silicon steel part.
Embodiment 2
The scheme of the present embodiment is basic identical with embodiment 1, unlike, see Fig. 2, the three-phase cake formula contravariant transformer of the balance leakage inductance of the present embodiment often has two leakage field groups mutually, and namely each stem stem is provided with primary coil 200, secondary coil 300 and primary coil 200 from top to bottom.
Comparative example 1
This comparative example is substantially consistent with embodiment 1, unlike, this comparative example does not arrange the first leakage field sheet and the second leakage field sheet.
Comparative example 2
This comparative example is substantially consistent with embodiment 2, unlike, this comparative example does not arrange the first leakage field sheet and the second leakage field sheet.
Transformer device structure disclosed in embodiment 1 and comparative example 1 is utilized to produce 3-phase dry type isolating transformer product (3KW270V/200VDyn11), be numbered No. 1, transformer and No. 2 respectively, embodiment 2 and the disclosed transformer device structure of comparative example 2 is utilized to produce 3-phase dry type isolating transformer (10KW175V/380VDyn11), be numbered transformer 3 and 4 respectively, the leakage inductance of No. 1 ~ 4, transformer is tested, obtains following form.
As can be seen from data in upper table, after being provided with the first leakage field sheet 410 and the second leakage field sheet 420, the technique effect of balance ABC three-phase leakage inductance can be reached.
Should be understood that; application of the present utility model is not limited to above-mentioned citing; for those of ordinary skills, can be improved according to the above description or convert, all these improve and convert the protection range that all should belong to the utility model claims.
Claims (3)
1. one kind balances the three-phase cake formula contravariant transformer of leakage inductance, it is characterized in that, comprise iron core, described iron core comprises two fixtures be arranged in parallel and is arranged on the first stem stem, the second stem stem and the 3rd stem stem between two fixtures, three stem stems are arranged in order setting, and the first stem stem and the 3rd stem stem are arranged on the second stem stem both sides; Described first stem stem, the second stem stem and the 3rd stem stem are provided with at least one primary coil and secondary coil, form ABC three-phase transformer;
Be provided with the first leakage field sheet compensating A phase leakage inductance between the primary coil of described first stem stem and secondary coil, described first leakage field sheet is arranged on outside the first stem stem;
Be provided with the second leakage field sheet compensating C phase leakage inductance between the primary coil of described 3rd stem stem and secondary coil, described second leakage field sheet is arranged on outside the 3rd stem stem;
Also comprise insulating part, described insulating part be arranged on inside the first stem stem, inside the second stem stem both sides and the 3rd stem stem, between the primary coil being placed in each stem stem and fixture, between primary coil and secondary coil and between secondary coil and fixture.
2. the three-phase cake formula contravariant transformer of balance leakage inductance according to claim 1, is characterized in that, described first leakage field sheet and the second leakage field sheet are provided with insulating outer layer.
3. the three-phase cake formula contravariant transformer of balance leakage inductance according to claim 1 and 2, is characterized in that, described first leakage field sheet and the second leakage field sheet are silicon steel part or iron silicon member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520707918.XU CN205039063U (en) | 2015-09-14 | 2015-09-14 | Three -phase cake formula contravariant transformer of balanced leakage inductance |
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| CN201520707918.XU CN205039063U (en) | 2015-09-14 | 2015-09-14 | Three -phase cake formula contravariant transformer of balanced leakage inductance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185553A (en) * | 2015-09-14 | 2015-12-23 | 广东新昇电业科技股份有限公司 | Three-phase pancake inversion transformer for balancing leakage inductance |
| CN107134358A (en) * | 2016-02-26 | 2017-09-05 | 艾默生网络能源有限公司 | A kind of inductance winding method and device |
-
2015
- 2015-09-14 CN CN201520707918.XU patent/CN205039063U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185553A (en) * | 2015-09-14 | 2015-12-23 | 广东新昇电业科技股份有限公司 | Three-phase pancake inversion transformer for balancing leakage inductance |
| CN107134358A (en) * | 2016-02-26 | 2017-09-05 | 艾默生网络能源有限公司 | A kind of inductance winding method and device |
| US10763039B2 (en) | 2016-02-26 | 2020-09-01 | Vertiv Tech Co., Ltd. | Inductor winding method and inductor winding device |
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