CN114156072A - High-precision adjustable transformer - Google Patents
High-precision adjustable transformer Download PDFInfo
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- CN114156072A CN114156072A CN202111467376.XA CN202111467376A CN114156072A CN 114156072 A CN114156072 A CN 114156072A CN 202111467376 A CN202111467376 A CN 202111467376A CN 114156072 A CN114156072 A CN 114156072A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000010892 electric spark Methods 0.000 description 4
- 210000003298 dental enamel Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
-
- 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
- H01F27/006—Details of transformers or inductances, in general with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a high-precision adjustable transformer which comprises an annular iron core, a primary coil and a secondary coil, wherein the primary coil and the secondary coil are respectively wound on two sides of the iron core, a plurality of output parts are arranged on the secondary coil along the axial direction of the secondary coil, an output block is connected to the secondary coil in a sliding manner, the output blocks can be electrically connected with the output parts in a sliding manner in sequence, one output tap of the secondary coil is connected to the end part of the secondary coil, and the other output tap is connected to the output block. In the process that the output block slides along the output parts and is sequentially connected with different output parts, the number of turns of the coil between the two output taps is changed, so that the output voltage is adjusted, and the farther the two output taps are away, the higher the output voltage is. The device directly adopts the mode of changing the number of turns of the coil to carry out linear regulation of voltage, has higher reliability and longer service life compared with electronic transformation, does not change the regulation precision along with the change of the service life, and is suitable for the tolerance experiment aiming at the power device in a laboratory.
Description
Technical Field
The invention relates to the field of power equipment, in particular to a high-precision adjustable transformer.
Background
In an electric power system, a transformer is used for converting voltage of commercial power or industrial power to meet different voltage requirements of different devices, so that the transformer is required to have outputs of various voltages when aiming at various electric devices.
The existing multi-voltage value output transformer is mostly a fixed voltage value, namely, the secondary side of the transformer is wound with a plurality of coils with different turns, and each coil can output different voltage values. However, in a laboratory environment, voltage needs to be linearly adjusted to perform a tolerance experiment on power components, and the conventional multi-tap transformer obviously cannot meet linear voltage output; although the electronic transformer can linearly regulate the voltage, the voltage regulation range is limited, and the experimental regulation in a high-voltage interval cannot be carried out, so that the reliability and the accuracy of the experiment are greatly reduced; and the electronic transformer has a short life, is difficult to support frequent voltage regulation, and can cause the reduction of the accuracy of the output voltage along with the aging of equipment.
Therefore, there is a need for a new type of high precision, long life adjustable transformer that solves the above problems.
Disclosure of Invention
One object of the present invention is to provide a new solution for an adjustable transformer.
According to a first aspect of the invention, a high-precision adjustable transformer is provided, which comprises an annular iron core, and a primary coil and a secondary coil which are respectively wound on two sides of the iron core, wherein a plurality of output parts are arranged on the secondary coil along the axial direction of the secondary coil, an output block is connected on the secondary coil in a sliding manner, the sliding of the output block can be sequentially electrically connected with the output parts, one output tap of the secondary coil is connected to the end part of the secondary coil, and the other output tap is connected to the output block.
Through the scheme, in the process that the output block slides along the output part and is sequentially connected with different output parts, the number of turns of the coil between the two output taps is changed, so that the output voltage is adjusted, and the farther the distance between the two output taps is, the larger the output voltage is. The device directly adopts the mode of changing the number of turns of the coil to carry out linear regulation of voltage, has higher reliability and longer service life compared with electronic transformation, does not change the regulation precision along with the change of the service life, and is suitable for the tolerance experiment aiming at the power device in a laboratory.
Preferably, the secondary coil is formed by winding enameled wires which are spirally arranged, an insulating layer of the enameled wire positioned at the outermost layer is opened outwards to form the output part, and the output parts are planar and are mutually insulated.
According to the scheme, only the outer layer of the enameled wire is windowed without damaging the circuit, so that the risk of electric sparks generated in gaps between disconnected circuits is avoided, the integrity of the circuit is ensured, and the electric energy loss caused by excessive contacts is reduced; the planar output portion can increase the contact area of the output block, thereby reducing the resistance.
Preferably, a slide rail is fixed on the secondary coil, the slide rail includes an insulated sliding portion and a conductive connecting block, the connecting block is embedded in the sliding portion, the connecting block is connected with the output portion in a one-to-one correspondence manner, and the output block is connected with the sliding portion in a sliding manner and is electrically connected with the output portion through the connecting block.
According to the scheme, the insulated sliding part is fixed outside the secondary coil in a glue joint mode and the like, and the exposed output part is wrapped to play a protection role; the output block is connected with the sliding part in a sliding manner so as to improve the smoothness and the reliability in the sliding process.
Preferably, the output block is provided with contacts, the contacts are connected with output taps and electrically connected with the connecting blocks, and the distance between the connecting blocks is greater than the diameter of the contacts.
Through this scheme, output block is along the slide rail removal in-process, and the contact is only connected with a connecting block electricity when guaranteeing to put through at every turn, avoids producing the short circuit between the coil, influences the precision of voltage control.
Preferably, a connecting hole penetrates through the output block, the contact is connected to the connecting hole in a sliding mode, an extrusion spring is arranged at the bottom of the contact and the connecting hole, and the extrusion spring always applies pressure towards the connecting block to the contact.
Through this scheme, the extrusion spring can extrude contact to the connecting block on, guarantee compactness and the reliability of being connected between contact and the connecting block, avoid appearing the gap and cause the danger of producing the electric spark.
Preferably, the extrusion spring is provided with a plurality of pieces and annularly arranged to the periphery of the bottom of the contact, and the output tap is located between rings surrounded by the extrusion spring and connected to the center of the bottom of the contact.
Through this scheme, under the stable prerequisite of guaranteeing extrusion spring output, make the output take a percentage and keep away from extrusion spring, produce induced-current and cause the waste of electric energy in avoiding extrusion spring.
Preferably, the end of the contact is provided with a semicircular connecting part, and the center of the end of the connecting block is provided with a positioning groove matched with the connecting part.
Through this scheme, connecting portion can block play the effect of temporary fixation to the positioning groove in, guarantee that it can be accurate keep being connected with output.
Preferably, clamping plates are arranged on the inner sides of the secondary coils, and the upper ends and the lower ends of the sliding rails are fixed with the clamping plates to clamp the secondary coils; the splint with the one side that the slide rail is relative all is provided with the inoxidizing coating.
By the scheme, the tightness and reliability of the joint of the sliding rail and the secondary coil are improved, and the joint block is prevented from being separated from the joint of the output part in the use process; the protective layer is made of rubber or insulating glass wool, and can reduce pressure on the insulating layer of the secondary coil and avoid damaging the insulating layer.
Preferably, the transformer comprises a transformer shell, wherein an adjusting handle is rotatably connected to the transformer shell, the adjusting handle penetrates through the transformer shell and is connected with a winding wheel set, and the output block is located between the winding wheel sets and is connected to the winding wheel set through a pull rope.
Through this scheme, the upper and lower slip control to the output piece can be realized to the rotatory adjustment handle, and pure mechanical structure reliability is higher.
Preferably, an observation window is formed in the transformer shell, organic glass is sealed on the observation window, and the transformer shell extrudes the output block to abut against the connecting block.
By the scheme, the working condition of the internal output block can be conveniently observed; the transformer shell is extruded to the output block to play a role in assisting in compressing, and the tightness of connection among the contact, the connecting block and the output part is further guaranteed.
According to an embodiment of this disclosure, this device is pure mechanical structure, carries out the regulation of voltage through the mode that directly changes the coil turn number between the output tap, compares in electronic transformer's pressure regulating, and the outputable voltage range is wider, can carry out the output of high voltage, and life is longer moreover, and the reliability is higher, can not receive live time and self life and influence the output precision.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a high-precision adjustable transformer according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a position structure of an output part in the high-precision adjustable transformer of fig. 1.
Fig. 3 is a schematic structural diagram of the position of the slide rail and the output block in fig. 1.
Fig. 4 is a front view of the slide rail of fig. 3.
Fig. 5 is a schematic diagram of the structure of the output block in fig. 3.
Fig. 6 is a schematic structural diagram of positions of the sliding rail and the transformer housing in fig. 1.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Examples
As shown in fig. 1 to 6, the high-precision adjustable transformer in this embodiment includes an annular iron core 110, and a primary coil 120 and a secondary coil 130 respectively wound on two sides of the iron core, wherein a plurality of output portions 133 are formed on the secondary coil 130 along an axial direction thereof, an output block 220 is slidably connected to the secondary coil 130, a sliding of the output block 220 can be sequentially electrically connected to the output portions 133, one output tap 131 of the secondary coil 130 is connected to an end of the secondary coil 130, and the other output tap is connected to the output block 220.
Through the scheme of the embodiment, in the process that the output block 220 slides along the output part 133 and is sequentially connected with different output parts 133 for conducting electricity, as the output block 220 drives one of the output taps 131 to move, the number of turns of the coil between the two output taps 131 is changed, so that the output voltage is adjusted, and the farther the distance between the two output taps 131 is, the larger the output voltage is.
The device directly adopts the mode of changing the number of turns of the coil to carry out linear regulation of voltage, has higher reliability and longer service life compared with electronic transformation, does not change the regulation precision along with the change of the service life, and is suitable for the tolerance experiment aiming at the power device in a laboratory.
In this embodiment or other embodiments, the secondary coil 130 is formed by winding enamel wires 132 arranged in a spiral shape, the insulation layer of the enamel wire 132 positioned at the outermost layer is opened to the outside to form the output part 133, and the output parts 133 are flat and insulated from each other.
Only the outermost layer of the enameled wire 132 is windowed without damaging the circuit, so that the risk of electric sparks generated in gaps between disconnected circuits is avoided, the integrity of the circuit is ensured, the electric energy loss caused by excessive contacts is reduced, the diameter of the circuit is prevented from generating large change, and the resistance increase caused by the influence on the conductivity is avoided; the planar output portion 133 can increase the contact area of the output block 220, reduce the resistance, and prevent the generation of spark in a large gap.
In this embodiment or other embodiments, a slide rail 210 is fixed on the secondary coil 130, the slide rail 210 includes an insulating sliding portion 211 and a conductive connection block 212, the connection block 212 is embedded in the sliding portion 211, the connection blocks 212 correspond to and are electrically connected to the output portions 133 one by one, and the output block 220 is connected to the sliding portion 211 in a sliding manner and is electrically connected to the output portions 133 through the connection blocks 212.
The sliding part 211 is made of rubber or plastic, for example, the insulating sliding part 211 is fixed to the outside of the secondary coil 130 by gluing or the like, and covers the exposed output part 133 to play a role in protection; the output block 220 is connected with the sliding part 211 in a sliding manner so as to improve the smoothness and reliability in the sliding process, and can play a role of guiding the output block 220, so that the output block 220 can be more accurately connected with the output part 133 through the connecting block 212.
The sliding grooves are formed in the two sides of the sliding portion 211 in the embodiment, the two sides of the output block 220 extend inwards to form the clamping portions, the clamping portions are respectively inserted into the sliding grooves in the two sides to achieve sliding connection, the tightness of connection between the output block 220 and the sliding rail 210 can be improved through the arrangement, and the electric connection effect is guaranteed.
In this embodiment or other embodiments, the output block 220 is provided with contacts 221, the contacts 221 are connected with output taps 131 and electrically connected with the connection blocks 212, and the distance between the connection blocks 212 is greater than the diameter of the contacts 221. In the process that the output block 220 moves along the sliding rail 210, the contact 221 is ensured to be electrically connected with only one connecting block 212 when the output block is switched on every time, and the phenomenon that short circuit is generated between coils to influence the accuracy of voltage regulation is avoided.
In this embodiment or other embodiments, a connection hole 222 is formed through the output block 220, the contact 221 is slidably connected to the connection hole 222, a pressing spring 223 is disposed at the bottom of the contact 221 and the connection hole 222, and the pressing spring 223 always applies a pressure to the contact 221 toward the connection block 212. The pressing spring 223 can press the contact 221 to the connecting block 212, so that the tightness and reliability of connection between the contact 221 and the connecting block 212 are guaranteed, and the danger of electric sparks caused by gaps is avoided.
In this embodiment or other embodiments, the pressing spring 223 has a plurality of pieces and is annularly arranged around the bottom of the contact 221, and the output tap 131 is located between the rings surrounded by the pressing spring 223 and is connected to the bottom center of the contact 221. The output spring 223 arranged annularly ensures that the output tap 131 is far away from the extrusion spring 223 on the premise of ensuring the stable pressure of the extrusion spring 223, thereby avoiding the waste of electric energy caused by the induced current generated in the extrusion spring 223.
In this embodiment or other embodiments, the end of the contact 221 is provided with a semicircular connecting portion 224, and the end of the connecting block 212 is centrally provided with a positioning groove 213 matching with the connecting portion 224. The connecting part 224 can be clamped into the positioning groove 213 to play a role in temporary fixation, so that the connecting part can be accurately kept connected with the output part 133, the connection stability is improved, and the clamping generated when the contact 221 is clamped into the positioning groove 213 plays a role in feedback; this arrangement also increases the contact area between the contact 221 and the connection block 212, and further improves the reliability after connection.
In this embodiment or other embodiments, the inner side of the secondary coil 130 is provided with a clamping plate 230, the upper and lower ends of the sliding rail 210 are fixed with the clamping plate 230 to clamp the secondary coil 130, so as to improve the tightness and reliability of the joint between the sliding rail 210 and the secondary coil 130, and avoid the joint between the connecting block 220 and the output part 133 from being separated in the use process;
the opposite surfaces of the clamping plate 230 and the sliding rail 210 are provided with a protective layer (not shown), such as rubber or insulating glass wool, which can reduce the pressure on the insulating layer of the secondary coil 130 and avoid damaging the insulating layer.
In this embodiment or other embodiments, the power transformer further includes a transformer housing 140, an adjusting handle 151 is rotatably connected to the transformer housing 140, the adjusting handle 151 penetrates through the transformer housing 140 and is connected to a winding wheel set 152, and the output block 220 is located between the winding wheel sets 152 and is connected to the winding wheel set 152 through a pull rope. This winding wheel group 152 has two winding wheels, is located the upper and lower both sides of output block 220 respectively, and the both ends of stay cord are fixed respectively to the upper and lower both ends of output block 220 and all twine with the winding wheel, can realize the rolling to the stay cord during rotation adjustment handle 151 to realize the upper and lower slip control of output block 220, pure mechanical structure reliability is higher.
In this embodiment or other embodiments, the transformer housing 140 is provided with an observation window, and the observation window is sealed with organic glass 141, so that the working condition of the internal output block can be observed conveniently; the transformer housing 140 extrudes the output block 220 to abut against the connecting block 212, and the transformer housing 140 extrudes the output block 220 to play a role in assisting in compressing, so that the tightness of connection among the contact, the connecting block and the output part is further ensured.
According to this embodiment, this device is pure mechanical structure, carries out the regulation of voltage through the mode that directly changes the coil turn number between the output tap, compares in electronic transformer's pressure regulating, and exportable voltage range is wider, can carry out the output of high voltage, and life is longer moreover, and the reliability is higher, can not receive live time and self life-span and influence the output precision.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. The utility model provides an adjustable transformer of high accuracy, includes annular iron core and twines respectively extremely the primary coil and the secondary coil of iron core both sides, its characterized in that, a plurality of output portions have been seted up along its axial on the secondary coil, sliding connection has the output piece on the secondary coil, the slip of output piece can in proper order with the output portion electricity is connected, the output of secondary coil is taken a percentage and is connected to the tip of secondary coil, and another is connected to the output piece.
2. The high-precision adjustable transformer according to claim 1, wherein the secondary coil is formed by winding enameled wires arranged in a spiral manner, an insulating layer of the enameled wires positioned at the outermost layer is opened outwards to form the output part, and the output parts are planar and insulated from each other.
3. The high-precision adjustable transformer according to claim 1, wherein a slide rail is fixed on the secondary coil, the slide rail comprises an insulating sliding part and a conductive connecting block, the connecting block is embedded in the sliding part, the connecting block is connected with the output parts in a one-to-one correspondence manner, and the output block is connected with the sliding part in a sliding manner and is electrically connected with the output parts through the connecting block.
4. The high-precision adjustable transformer according to claim 3, wherein the output block is provided with contacts, output taps are connected to the contacts and electrically connected with the connecting blocks, and the distance between the connecting blocks is larger than the diameter of the contacts.
5. The high-precision adjustable transformer according to claim 4, wherein a connection hole is formed through the output block, the contact is slidably connected into the connection hole, and a pressing spring is arranged at the bottom of the contact and the connection hole and always applies pressure to the contact towards the connection block.
6. The high-precision adjustable transformer according to claim 5, wherein the extrusion spring is provided with a plurality of pieces and arranged in a ring shape to the periphery of the bottom of the contact, and the output tap is positioned between rings surrounded by the extrusion spring and connected to the center of the bottom of the contact.
7. The high-precision adjustable transformer according to claim 5, wherein the contact end is provided with a semicircular connecting part, and the center of the end of the connecting block is provided with a positioning groove matched with the connecting part.
8. The high-precision adjustable transformer according to claim 3, wherein a clamping plate is arranged on the inner side of the secondary coil, and the upper end and the lower end of the sliding rail are fixed with the clamping plate to clamp the secondary coil; the splint with the one side that the slide rail is relative all is provided with the inoxidizing coating.
9. The high-precision adjustable transformer according to claim 3, further comprising a transformer housing, wherein an adjusting handle is rotatably connected to the transformer housing, the adjusting handle penetrates through the transformer housing and is connected with winding wheel sets, and the output block is located between the winding wheel sets and is connected to the winding wheel sets through a pull rope.
10. The high-precision adjustable transformer of claim 9, wherein an observation window is formed in the transformer housing, organic glass is sealed on the observation window, and the transformer housing presses the output block against the connecting block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467376.XA CN114156072A (en) | 2021-12-02 | 2021-12-02 | High-precision adjustable transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467376.XA CN114156072A (en) | 2021-12-02 | 2021-12-02 | High-precision adjustable transformer |
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| Publication Number | Publication Date |
|---|---|
| CN114156072A true CN114156072A (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111467376.XA Pending CN114156072A (en) | 2021-12-02 | 2021-12-02 | High-precision adjustable transformer |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5283728A (en) * | 1992-10-15 | 1994-02-01 | Hobart Edward J | Variable transformer with slidable contactor |
| CN203722235U (en) * | 2014-01-04 | 2014-07-16 | 指明集团有限公司 | Intelligent capacitor |
| CN204029590U (en) * | 2013-11-23 | 2014-12-17 | 信元瑞电气有限公司 | Series reactor |
| CN105590722A (en) * | 2014-10-21 | 2016-05-18 | 黑龙江傲立辅龙科技开发有限公司 | Power miniature transformer |
| CN206532691U (en) * | 2017-01-18 | 2017-09-29 | 深圳市先高电子有限公司 | A kind of flat-plate transformer for being easy to adjust |
| CN107403686A (en) * | 2017-07-27 | 2017-11-28 | 赵雅琴 | Without tap continuous transformer |
| CN207883500U (en) * | 2018-03-19 | 2018-09-18 | 佛山市特宇电力设备有限公司 | A kind of transformer core die arrangement |
| CN112071584A (en) * | 2020-08-10 | 2020-12-11 | 江苏华盛电气股份有限公司 | Multi-voltage output transformer |
| US20210269246A1 (en) * | 2017-03-08 | 2021-09-02 | Antonio SUBIRATS ROCA | Portable linear transformer for laminated gypsum boards |
-
2021
- 2021-12-02 CN CN202111467376.XA patent/CN114156072A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5283728A (en) * | 1992-10-15 | 1994-02-01 | Hobart Edward J | Variable transformer with slidable contactor |
| CN204029590U (en) * | 2013-11-23 | 2014-12-17 | 信元瑞电气有限公司 | Series reactor |
| CN203722235U (en) * | 2014-01-04 | 2014-07-16 | 指明集团有限公司 | Intelligent capacitor |
| CN105590722A (en) * | 2014-10-21 | 2016-05-18 | 黑龙江傲立辅龙科技开发有限公司 | Power miniature transformer |
| CN206532691U (en) * | 2017-01-18 | 2017-09-29 | 深圳市先高电子有限公司 | A kind of flat-plate transformer for being easy to adjust |
| US20210269246A1 (en) * | 2017-03-08 | 2021-09-02 | Antonio SUBIRATS ROCA | Portable linear transformer for laminated gypsum boards |
| CN107403686A (en) * | 2017-07-27 | 2017-11-28 | 赵雅琴 | Without tap continuous transformer |
| CN207883500U (en) * | 2018-03-19 | 2018-09-18 | 佛山市特宇电力设备有限公司 | A kind of transformer core die arrangement |
| CN112071584A (en) * | 2020-08-10 | 2020-12-11 | 江苏华盛电气股份有限公司 | Multi-voltage output transformer |
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