CN112420356A - Dual-purpose power transformer - Google Patents
Dual-purpose power transformer Download PDFInfo
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- CN112420356A CN112420356A CN202011256485.2A CN202011256485A CN112420356A CN 112420356 A CN112420356 A CN 112420356A CN 202011256485 A CN202011256485 A CN 202011256485A CN 112420356 A CN112420356 A CN 112420356A
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- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
本发明公开了一种两用电力变压器，包括壳体，所述壳体内设置有变压器机构和功能转换机构，所述变压器机构包括初级线圈、第一次级线圈和第二次级线圈，所述功能转换机构包括调向部件和连接部件，所述连接部件设置于所述调向部件的输出端且围绕该输出端转动，在所述连接部件转动至与所述第一次级线圈和所述第二次级线圈之间，并同时与所述第一次级线圈和所述第二次级线圈电连接时，所述第一次级线圈和所述第二次级线圈反向串联，从而使所述变压器机构构成差动变压器，所以本发明中的电力变压器既可以实现常规变压器功能，又可实现差动变压器的功能，且在功能转换的过程中无需拆线连线，简化操作步骤，避免出现错连现象。
The invention discloses a dual-purpose power transformer, comprising a casing, a transformer mechanism and a function conversion mechanism are arranged in the casing, the transformer mechanism includes a primary coil, a first secondary coil and a second secondary coil, the The function conversion mechanism includes a steering member and a connecting member, the connecting member is arranged at the output end of the steering member and rotates around the output end, and the connecting member is rotated to connect with the first secondary coil and the When the second secondary coils are electrically connected with the first secondary coil and the second secondary coil at the same time, the first secondary coil and the second secondary coil are connected in reverse series, so that The transformer mechanism constitutes a differential transformer, so the power transformer in the present invention can realize both the function of a conventional transformer and the function of a differential transformer, and in the process of function conversion, there is no need to disconnect the wires, simplifying the operation steps, Avoid misconnections.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a dual-purpose power transformer.
Background
A differential transformer refers to a transformer device widely used in electronics and non-electrical quantity detection. The method is mainly used for measuring non-electric quantity parameters such as displacement, pressure, vibration and the like. It can be used for both static and dynamic measurements. The differential transformer is composed of a primary coil and a secondary coil, and the secondary coil is divided into two parts with opposite polarities. When an AC voltage is applied to the primary coil, if the core is off-center, the difference in electromotive force induced in the secondary coil increases as the core moves
The differential transformer is composed of a primary coil and a secondary coil, and the secondary coil is divided into two parts with opposite polarities. When an alternating voltage is applied to the primary coil, if the core is separated from the center, a difference in electromotive force is induced in the secondary coil, and the difference in electromotive force increases as the core moves.
The differential transformer in the prior art can only play a measuring role and cannot be used as a common transformer, if the common transformer has the function of the differential transformer, two secondary coils are required to be connected in series in a reverse direction, so that the circuits of internal components of the transformer need to be reconnected, the circuits which need to be reconnected are more and complicated, and the misconnection phenomenon is easy to occur in the process of reconnection.
Disclosure of Invention
The invention aims to provide a dual-purpose power transformer, which solves the problems that in the prior art, in order to enable a common transformer to have the function of a differential transformer, two secondary coils need to be reversely connected in series, so that the circuits of internal components of the transformer need to be reconnected, the number of the circuits needing to be reconnected is large, the circuits are complicated, and the misconnection phenomenon is easy to occur in the process of reconnection.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
a dual-purpose power transformer comprises a shell, wherein a transformer mechanism for realizing the functions of a conventional transformer and a differential transformer and a function switching mechanism for changing the connection mode of components in the transformer mechanism so as to ensure that the transformer mechanism respectively realizes the functions of the conventional transformer and the differential transformer are arranged in the shell;
the transformer mechanism comprises a first frame body and a second frame body which are arranged in the shell, wherein a first iron core is arranged in the first frame body, a second iron core is arranged in the second frame body, a primary coil is wound on the first iron core, and a first secondary coil and a second secondary coil are wound on the second iron core;
the function switching mechanism includes a direction-adjusting member and a connecting member, the connecting member is provided at an output end of the direction-adjusting member and rotates around the output end, and when the connecting member rotates to be connected between the first secondary coil and the second secondary coil and is electrically connected to the first secondary coil and the second secondary coil at the same time, the first secondary coil and the second secondary coil are connected in series in an opposite direction, so that the transformer mechanism constitutes a differential transformer.
As a preferable aspect of the present invention, the first frame and the second frame have the same structure and are both in a v-21274shape, the first frame and the first frame are symmetrically disposed in the housing, frame openings of the first frame and the second frame are opposite, a gap is left between the first frame and the second frame, the gap is a detection channel through which a moving body to be detected passes, and the housing is provided with a through hole corresponding to the detection channel.
As a preferable scheme of the present invention, two ends of the primary coil are respectively provided with a first fixed end and a second fixed end, the inner wall of the first frame is provided with a first terminal and a second terminal, the first fixed end and the first terminal are corresponding in end position and connected through a conductive rod, and the second fixed end and the second terminal are corresponding in end position and connected through a conductive rod.
As a preferable aspect of the present invention, a third fixing end and a fourth fixing end are respectively disposed at two ends of the first secondary coil, a third terminal and a fourth terminal are disposed on an inner wall of the second frame, the third fixing end and the third terminal are corresponding in position and connected to each other through a conductive rod, and the fourth fixing end and the fourth terminal are corresponding in position.
As a preferable aspect of the present invention, a fifth fixing end and a sixth fixing end are respectively disposed at two ends of the second secondary coil, a fifth terminal and a sixth terminal are disposed on an inner wall of the second frame, the fifth fixing end and the fifth terminal are corresponding in position and connected to each other through a conductive rod, and the sixth fixing end and the sixth terminal are corresponding in position.
As a preferable aspect of the present invention, the direction adjusting component includes a conversion rotation shaft fixed on an inner wall of the second frame body through a bearing, the conversion rotation shaft penetrates through the second frame body and the housing and extends to the outside of the housing, a direction adjusting cross bar is arranged outside the housing, and the direction adjusting cross bar is connected to the conversion rotation shaft.
As a preferred scheme of the invention, the connecting part comprises a connecting transverse plate and a connecting transverse rod, the connecting transverse rod is arranged on the surface of the connecting transverse plate, the connecting transverse plate and the connecting transverse rod are both parallel to the axis of the second iron core, two ends of the connecting transverse plate are respectively connected with a first connecting vertical rod and a second connecting vertical rod, and two ends of the connecting transverse rod are respectively and vertically connected with a third connecting vertical rod and a fourth connecting vertical rod.
As a preferred embodiment of the present invention, the conductive rod, the first vertical connecting rod, the second vertical connecting rod, the horizontal connecting rod, the third vertical connecting rod, and the fourth vertical connecting rod are all conductive structures, and the conversion rotating shaft and the horizontal connecting plate are insulating structures.
As a preferable aspect of the present invention, when the function switching mechanism is in the initial state, the first vertical connecting rod is located between the fourth fixed end and the fourth terminal, one end of the first vertical connecting rod is in contact with and electrically connected to the fourth fixed end, the other end of the first vertical connecting rod is in contact with and electrically connected to the fourth terminal, the second vertical connecting rod is located between the sixth fixed end and the sixth terminal, one end of the second vertical connecting rod is in contact with and electrically connected to the sixth fixed end, and the other end of the second vertical connecting rod is in contact with and electrically connected to the sixth terminal;
meanwhile, the third connecting vertical rod is located at the first secondary coil, the third connecting vertical rod is in contact with the third fixed end, the third connecting vertical rod is in contact with the fourth fixed end, the fourth connecting vertical rod is located at the second secondary coil, and the fourth connecting vertical rod is in contact with the fifth fixed end, the fourth connecting vertical rod is in contact with the sixth fixed end.
As a preferred aspect of the present invention, after the rotation degree of the rotating shaft is converted, the function converting mechanism enters a second state, at this time, the first connecting vertical rod is located at the second secondary coil, there is no contact between the first connecting vertical rod and each terminal, and between the first connecting vertical rod and each fixed end, the second connecting vertical rod is located at the first secondary coil, and there is no contact between the second connecting vertical rod and each terminal, and between the second connecting vertical rod and each fixed end;
the third connecting vertical rod is located at the second secondary coil, the third connecting vertical rod is in contact with and electrically connected with the sixth fixed end, the fourth connecting vertical rod is located at the first secondary coil, and the fourth connecting vertical rod is in contact with and electrically connected with the fourth fixed end.
Compared with the prior art, the invention has the following beneficial effects:
the invention can change the connection relation among the fourth fixed end, the fourth wiring end, the fourth fixed end and the sixth fixed end by arranging the function switching mechanism and rotating the switching rotating shaft, so that the first secondary coil and the second secondary coil are reversely connected in series, the transformer mechanism is changed from realizing the function of a common voltage device to realizing the function of a differential voltage device, the switching process does not need to be reconnected with a lead wire, thereby being capable of being quickly completed, simultaneously avoiding the possible misconnection phenomenon in the rewiring process, simplifying the operation steps and improving the working efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a dual-purpose power transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first frame body according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a second frame body according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a function switching mechanism according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of the function switching mechanism in the second state according to the embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a conductive rod according to an embodiment of the present invention.
The reference numerals in the drawings denote the following, respectively:
1. a housing; 2. a transformer mechanism; 3. a function switching mechanism;
201. a first frame body; 202. a second frame body; 203. a first iron core; 204. a second iron core; 205. a primary coil; 206. a first secondary coil; 207. a second secondary coil; 208. a detection channel; 209. a through hole; 210. a first fixed end; 211. a second fixed end; 212. a first terminal; 213. a second terminal; 214. a conductive rod; 215. a third fixed end; 216. a fourth fixed end; 217. a third terminal; 218. a fourth terminal; 219. a fifth fixed end; 220. a sixth fixed end; 221. a fifth terminal; 222. a sixth terminal;
31. a direction-adjusting component; 32. a connecting member;
311. converting the rotating shaft; 312. adjusting the direction of the cross rod;
321. connecting the transverse plates; 322. connecting the cross bars; 323. the first connecting vertical rod; 324. a second connecting vertical rod; 325. a third connecting vertical rod; 326. and the fourth connecting vertical rod.
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.
As shown in fig. 1 to 6, the present invention provides a dual-purpose power transformer, which includes a casing 1, a transformer mechanism 2 for implementing a conventional transformer function and a differential transformer function and a function switching mechanism 3 for changing a connection manner of components in the transformer mechanism 2 to enable the transformer mechanism 2 to implement the conventional transformer function and the differential transformer function respectively, so that the power transformer has both the functions of a common transformer and a differential transformer, thereby implementing dual-purpose capability.
The transformer mechanism 2 includes a first frame 201 and a second frame 202 disposed in the housing 1, a first iron core 203 is disposed in the first frame 201, a second iron core 204 is disposed in the second frame 202, a primary coil 205 is wound on the first iron core 203, a first secondary coil 206 and a second secondary coil 207 are wound on the second iron core 204, the first frame 201 and the second frame 202 have the same structure and are both in a shape of a v 21274, the first frame 201 and the first frame 201 are symmetrically disposed in the housing 1, the frame openings of the first frame 201 and the second frame 202 are opposite, two ends of the primary coil 205 are respectively provided with a first fixing end 210 and a second fixing end 211, the inner wall of the first frame 201 is provided with a first terminal 212 and a second terminal 213, the first fixing end 210 and the first terminal 212 correspond to each other and are connected to each other through a conductive rod 214, and the second fixing end 211 and the second terminal 213 correspond to each other and are connected to each other through a conductive rod 214.
A third fixed end 215 and a fourth fixed end 216 are respectively arranged at two ends of the first secondary coil 206, a third terminal 217 and a fourth terminal 218 are arranged on the inner wall of the second frame 202, the third fixed end 215 and the third terminal 217 are corresponding in position and are connected with each other through a conducting rod 214, and the fourth fixed end 216 and the fourth terminal 218 are corresponding in position; a fifth fixed end 219 and a sixth fixed end 220 are respectively disposed at two ends of the second secondary coil 207, a fifth terminal 221 and a sixth terminal 222 are disposed on an inner wall of the second frame 202, the fifth fixed end 219 corresponds to the fifth terminal 221, the fifth fixed end 219 and the fifth terminal 221 are connected through a conductive rod 214, and the sixth fixed end 220 corresponds to the sixth terminal 222.
If the function of the general transformer is to be implemented, the first fixing end 210 is electrically connected to the first terminal 212, the second fixing end 211 is electrically connected to the second terminal 213, the third fixing end 215 is electrically connected to the third terminal 217, the fourth fixing end 216 is electrically connected to the fourth terminal 218, the fifth fixing end 219 is electrically connected to the fifth terminal 221, and the sixth fixing end 220 is electrically connected to the sixth terminal 222; in order to realize the differential transformer function, the first fixing end 210 is electrically connected to the first terminal 212, the second fixing end 211 is electrically connected to the second terminal 213, the third fixing end 215 is electrically connected to the third terminal 217, the fourth fixing end 216 is electrically connected to the sixth fixing end 220, and the fifth fixing end 219 is electrically connected to the fifth terminal 221.
Therefore, when the function of the power transformer is changed, it is necessary to adjust the connection relationship between the terminals to form different connection networks, and in the two connection modes, the connection relationship between the first fixing end 210 and the first terminal 212, between the second fixing end 211 and the second terminal 213, between the third fixing end 215 and the third terminal 217, and between the fifth fixing end 219 and the fifth terminal 221 are always maintained, so the connection relationship of the above structures is maintained, and therefore, in the present embodiment, the connection relationship between the first fixing end 210 and the first terminal 212, between the second fixing end 211 and the second terminal 213, between the third fixing end 215 and the third terminal 217, and between the sixth fixing end 220 and the sixth terminal 222 are all connected through the conductive rod 214 and maintained electrically connected. The fixed conducting rod 214 is arranged to fix the electrical connection relationship, so that the connection relationship is not changed all the time when the function of the power transformer is changed, and the power transformer does not need to be adjusted or re-wired, thereby simplifying the operation steps and avoiding the misconnection phenomenon possibly generated in the re-wiring process.
Meanwhile, in the above function conversion process, the connection relationship among the fourth fixing end 216, the fourth terminal 218, the fourth fixing end 216 and the sixth fixing end 220 needs to be matched again. In order to make the above-mentioned re-matching process fast and stable and avoid the misconnection phenomenon during the re-wiring process, a function switching mechanism 3 is arranged in the housing 1, the function switching mechanism 3 includes a direction adjusting component 31 and a connecting component 32, the connecting component 32 is arranged at the output end of the direction adjusting component 31 and rotates around the output end, the direction adjusting component 31 includes a switching rotating shaft 311 fixed on the inner wall of the second frame 202 through a bearing, the switching rotating shaft 311 penetrates through the second frame 202 and the housing 1 and extends to the outside of the housing 1, a direction adjusting cross bar 312 is arranged outside the housing 1, the direction adjusting cross bar 312 is connected with the switching rotating shaft 311, the connecting component 32 includes a connecting transverse plate 321 and a connecting cross bar 322, the connecting cross bar 322 is arranged on the surface of the connecting transverse plate 321, the connecting transverse plate 321 and the connecting cross bar 322 are both parallel to the axis of the second iron core 204, both ends of the, the two ends of the connecting cross bar 322 are respectively vertically connected with a third connecting vertical bar 325 and a fourth connecting vertical bar 326.
In this embodiment, the conductive rod 214, the first vertical connecting rod 323, the second vertical connecting rod 324, the horizontal connecting rod 322, the third vertical connecting rod 325 and the fourth vertical connecting rod 326 are all conductive structures, and the converting shaft 311 and the horizontal connecting plate 321 are insulating structures.
When the function switching mechanism 3 is in the initial state, the first vertical connecting rod 323 is located between the fourth fixed end 216 and the fourth terminal 218, one end of the first vertical connecting rod 323 is in contact with and electrically connected to the fourth fixed end 216, the other end is in contact with and electrically connected to the fourth terminal 218, the second vertical connecting rod 324 is located between the sixth fixed end 220 and the sixth terminal 222, one end of the second vertical connecting rod 324 is in contact with and electrically connected to the sixth fixed end 220, and the other end is in contact with and electrically connected to the sixth terminal 222, so that the transformer mechanism 2 can function as a general power transformer.
Meanwhile, the third connecting vertical rod 325 is located at the first secondary coil 206, the third connecting vertical rod 325 and the third fixing end 215 are in non-contact with each other, the third connecting vertical rod 325 and the fourth fixing end 216 are in non-contact with each other, the fourth connecting vertical rod 326 is located at the second secondary coil 207, the fourth connecting vertical rod 326 and the fifth fixing end 219 are in non-contact with each other, and the fourth connecting vertical rod 326 and the sixth fixing end 220 are in non-contact with each other.
After the conversion rotation shaft 311 rotates 180 degrees, the function conversion mechanism 3 enters the second state, at this time, the first vertical connecting rod 323 is located at the second secondary coil 207, there is no contact between the first vertical connecting rod 323 and each terminal, and between the first vertical connecting rod 323 and each fixed end, the second vertical connecting rod 324 is located at the first secondary coil 206, and there is no contact between the second vertical connecting rod 324 and each terminal, and between the second vertical connecting rod 324 and each fixed end.
Meanwhile, the third connecting vertical rod 325 is located at the second secondary coil 207, the third connecting vertical rod 325 is in contact with and electrically connected to the sixth fixing end 220, the fourth connecting vertical rod 326 is located at the first secondary coil 206, and the fourth connecting vertical rod 326 is in contact with and electrically connected to the fourth fixing end 216, so that the first secondary coil 206 and the second secondary coil 207 are reversely connected in series, so that the transformer mechanism 2 realizes the function of a differential transformer.
Further, in order to realize the differential transformer function, a gap is left between the first frame 201 and the second frame 202, the gap is a detection channel 208 for the moving object to be detected to pass through, and the housing 1 is provided with a through hole 209 corresponding to the detection channel 208.
In this embodiment, by providing the function conversion mechanism 3, the connection relationship between the fourth fixed end 216, the fourth terminal 218, the fourth fixed end 216 and the sixth fixed end 220 can be changed by rotating the conversion rotation shaft 311, so that the first secondary coil 206 and the second secondary coil 207 are connected in series in an opposite direction, and the function of the transformer mechanism 2 is changed from the function of realizing a common voltage device to the function of realizing a differential voltage device.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011256485.2A CN112420356B (en) | 2020-11-11 | 2020-11-11 | A dual-purpose power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011256485.2A CN112420356B (en) | 2020-11-11 | 2020-11-11 | A dual-purpose power transformer |
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| Publication Number | Publication Date |
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| CN112420356A true CN112420356A (en) | 2021-02-26 |
| CN112420356B CN112420356B (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011256485.2A Expired - Fee Related CN112420356B (en) | 2020-11-11 | 2020-11-11 | A dual-purpose power transformer |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677065A (en) * | 1992-05-22 | 1994-03-18 | Yokokawa Koku Denki Kk | Differential transformer |
| US5789918A (en) * | 1995-10-16 | 1998-08-04 | Toyoda Koki Kabushiki Kaisha | Temperature compensated differential transformer and a measuring device using the same |
| CN203300419U (en) * | 2013-05-06 | 2013-11-20 | 马鞍山豪远电子有限公司 | Dual-purpose differential transformer |
| CN104124054A (en) * | 2014-07-08 | 2014-10-29 | 正泰电气股份有限公司 | Adjustable die for transformer coil winding |
| CN205810556U (en) * | 2016-06-30 | 2016-12-14 | 威海市泓淋电子有限公司 | A kind of scalable resonance transformer |
| CN211045323U (en) * | 2019-12-11 | 2020-07-17 | 合肥热电集团有限公司 | Accurate-positioning current control device for power transmission |
-
2020
- 2020-11-11 CN CN202011256485.2A patent/CN112420356B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677065A (en) * | 1992-05-22 | 1994-03-18 | Yokokawa Koku Denki Kk | Differential transformer |
| US5789918A (en) * | 1995-10-16 | 1998-08-04 | Toyoda Koki Kabushiki Kaisha | Temperature compensated differential transformer and a measuring device using the same |
| CN203300419U (en) * | 2013-05-06 | 2013-11-20 | 马鞍山豪远电子有限公司 | Dual-purpose differential transformer |
| CN104124054A (en) * | 2014-07-08 | 2014-10-29 | 正泰电气股份有限公司 | Adjustable die for transformer coil winding |
| CN205810556U (en) * | 2016-06-30 | 2016-12-14 | 威海市泓淋电子有限公司 | A kind of scalable resonance transformer |
| CN211045323U (en) * | 2019-12-11 | 2020-07-17 | 合肥热电集团有限公司 | Accurate-positioning current control device for power transmission |
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| CN112420356B (en) | 2022-05-27 |
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