CN113658785B - Modular planar transformer and electronic equipment - Google Patents
Modular planar transformer and electronic equipment Download PDFInfo
- Publication number
- CN113658785B CN113658785B CN202111224043.4A CN202111224043A CN113658785B CN 113658785 B CN113658785 B CN 113658785B CN 202111224043 A CN202111224043 A CN 202111224043A CN 113658785 B CN113658785 B CN 113658785B
- Authority
- CN
- China
- Prior art keywords
- circuit board
- magnetic core
- circuit
- conductor
- secondary winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Abstract
The invention relates to a modular planar transformer and an electronic device, the modular planar transformer comprising: the device comprises a transformer module and a detection module; the transformer module comprises a first circuit board and a magnetic core assembly, wherein a first bonding pad, a second bonding pad and two windings are arranged on the first circuit board, the first bonding pad is connected with the first conductor part, and the second bonding pad is connected with the second conductor part; the detection module comprises a thermistor, a second circuit board and a detection circuit, one end of the thermistor is connected with the first bonding pad, one end of the thermistor is connected with the second bonding pad, a third conductor part and a fourth conductor part are arranged on the second surface of the second circuit board, the third conductor part is connected with the first conductor part, and the fourth conductor part is connected with the second conductor part. The thermistor is arranged on the first surface of the first circuit board, the thermistor is connected with the detection circuit of the detection module, the temperature of the first circuit board is detected through the resistance value of the thermistor, and the temperature of the planar transformer is detected.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a modular planar transformer and electronic equipment.
Background
With the continuous development of information technology, the mobile terminal and its accessories are also developed toward miniaturization and convenience.
The planar transformer is a transformer which arranges the winding on the circuit board to realize the planarization of the winding, has the advantages of small volume, high frequency and small height, and can effectively reduce the volume of the charger when being applied to the charger of the mobile terminal such as a mobile phone.
However, the planar transformer generates a large amount of heat during operation, and has a small size and a small distance between circuits and elements, so that the planar transformer may burn through a circuit board when overheating occurs or when a circuit is short-circuited. Therefore, the temperature of the planar transformer needs to be detected in time, but the planar transformer has a small size, so that it is difficult to install a temperature sensor on the planar transformer.
Disclosure of Invention
Accordingly, there is a need for a modular planar transformer and an electronic device.
A modular planar transformer, comprising: the device comprises a transformer module and a detection module;
the transformer module comprises a first circuit board and a magnetic core assembly, wherein at least two through holes are formed in the first circuit board, the magnetic core assembly penetrates through each through hole, the magnetic core assembly is coated on two sides of the first circuit board, a first surface on the first circuit board is provided with a first bonding pad, a second bonding pad and two windings in a printing mode, each winding is wound on the outer side of one through hole, the first bonding pad and the second bonding pad are arranged on the outer side of one winding, a second surface on the first circuit board is provided with a first conductor part and a second conductor part, the first circuit board is provided with a first through hole and a second through hole, the first bonding pad is connected with the first conductor part through the first through hole, and the second bonding pad is connected with the second conductor part through the second through hole;
the detection module comprises a thermistor, a second circuit board and a detection circuit, wherein the thermistor is arranged on the first circuit board, one end of the thermistor is connected with the first bonding pad, the other end of the thermistor is connected with the second bonding pad, the detection circuit is arranged on the first surface of the second circuit board, a third conductor part and a fourth conductor part which are electrically connected with the detection circuit are arranged on the second surface of the second circuit board, the second surface of the second circuit board is connected with the second surface of the first circuit board, the third conductor part is connected with the first conductor part, and the fourth conductor part is connected with the second conductor part.
In one embodiment, the detection circuit comprises a detection chip and a connection circuit printed on the second circuit board, the detection chip is arranged on the first surface of the second circuit board, the connection circuit is printed on the first surface of the second circuit board, the connection circuit is electrically connected with the detection chip, the second circuit board is provided with a third via hole and a fourth via hole, the connection circuit is electrically connected with the third conductor part through the third via hole, and the connection circuit is electrically connected with the fourth conductor part through the fourth via hole.
In one embodiment, a sleeve hole is formed in the middle of the second circuit board, and the part of the magnetic core assembly protruding from the second surface of the first circuit board is located in the sleeve hole.
In one embodiment, the second circuit board is at least partially offset from the first circuit board.
In one embodiment, a first trench is formed in the first surface of the first circuit board on one side of the first pad, a first connection conductor is disposed in the first trench, one end of the first connection conductor is connected to the first via hole, and one end of the first connection conductor is connected to the first pad.
In one embodiment, a second channel is formed in one side of the second pad of the first surface of the first circuit board, a second connecting conductor is arranged in the second channel, one end of the second connecting conductor is connected with the second via hole, and one end of the second connecting conductor is connected with the second pad.
In one embodiment, the second side of the second circuit board is connected with the second side of the first circuit board through an adhesive layer.
In one embodiment, the second side of the second circuit board is detachably connected with the second side of the first circuit board.
In one embodiment, the detection module further includes a communication unit, the communication unit is electrically connected to the detection chip, and the communication unit is configured to send the temperature data detected by the detection chip to a host or a terminal through a wireless signal.
An electronic device comprising a modular planar transformer as described in any of the above embodiments.
The invention has the beneficial effects that: through setting up thermistor on the first face at first circuit board to be connected thermistor and detection module's detection circuitry, detect the temperature of first circuit board through thermistor's resistance, thereby can realize detecting the temperature of planar transformer, through setting up detection circuitry on the second circuit board, avoid occupying the space of first circuit board, make the area of first circuit board littleer, make the volume of planar transformer effectively reduce.
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 is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an exploded structure of a modular planar transformer according to an embodiment;
FIG. 2 is a schematic perspective exploded view of another embodiment of a modular planar transformer;
fig. 3 is a schematic perspective exploded view of a transformer module according to an embodiment;
fig. 4 is a schematic diagram of a logical connection principle of components of the modular planar transformer according to an embodiment.
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 3, a modular planar transformer 10 according to an embodiment of the present invention includes: a transformer module 100 and a detection module 200; the transformer module 100 includes a first circuit board 110 and a magnetic core assembly 120, the first circuit board 110 is provided with at least two through holes 101, the magnetic core assembly 120 is disposed in each of the through holes 101, the magnetic core assembly 120 covers two sides of the first circuit board 110, a first surface 108 of the first circuit board 110 is provided with a first pad 111, a second pad 112 and two windings (not shown) in a printing manner, each winding is wound outside one of the through holes 101, the first pad 111 and the second pad 112 are disposed outside one of the windings, a second surface 109 of the first circuit board 110 is provided with a first conductor portion 113 and a second conductor portion 114, the first circuit board 110 is provided with a first via hole (not shown) and a second via hole (not shown), and the first pad 111 is connected to the first conductor portion 113 through the first via hole, the second pad 112 is connected to the second conductor portion 114 through the second via;
the detection module 200 includes a thermistor 210, a second circuit board 220 and a detection circuit, the thermistor 210 is disposed on the first surface 108 of the first circuit board 110, one end of the thermistor 210 is connected to the first pad 111, the other end of the thermistor 210 is connected to the second pad 112, the detection circuit is disposed on the first surface 208 of the second circuit board 220, the second surface 209 of the second circuit board 220 is provided with a third conductor 231 and a fourth conductor 232 electrically connected to the detection circuit, the second surface 209 of the second circuit board 220 is connected to the second surface 109 of the first circuit board 110, the third conductor 231 is connected to the first conductor 113, and the fourth conductor 232 is connected to the second conductor 114.
In this embodiment, as shown in fig. 3, the first circuit board 110 is provided with three through holes 101, the magnetic core assembly 120 includes a first magnetic core 121 and a second magnetic core 122, the first magnetic core 121 and the second magnetic core 122 are E-shaped magnetic cores, the first magnetic core 121 and the second magnetic core 122 are respectively located at two sides of the first circuit board 110, two ends and a middle portion of the first magnetic core 121 respectively penetrate through the three through holes 101 to be connected with the second magnetic core 122, and the first magnetic core 121 is connected with the second magnetic core 122 through an epoxy adhesive. One winding is wound outside one through hole 101 and the other winding is wound outside the other through hole 101, so that the two windings are wound on the magnetic core assembly 120 and coupled to each other.
In this embodiment, the first pad 111 and the second pad 112 are disconnected from the winding, that is, the first pad 111 and the second pad 112 are not connected to the winding, but the first pad 111 and the second pad 112 are disposed outside the winding and are disposed adjacent to the winding, so that the thermistor connected to the first pad 111 and the second pad 112 can sense a change in temperature of the winding. In this embodiment, the resistance of the thermistor changes with the change of the temperature, and the temperature of the transformer module 100 can be obtained by detecting the resistance of the thermistor. For convenience of understanding, in the present embodiment, the first surface 108 of the first circuit board 110 is defined as a front surface of the first circuit board 110, the second surface 109 of the first circuit board 110 is defined as a back surface of the first circuit board 110, the first surface 208 of the second circuit board 220 is defined as a front surface of the second circuit board 220, and the second surface 209 of the second circuit board 220 is defined as a back surface of the second circuit board 220.
In this embodiment, the first pad 111 and the second pad 112 are disposed on the front surface of the first circuit board 110, the first conductor portion 113 and the second conductor portion 114 are disposed on the back surface of the first circuit board 110, the first pad 111 is connected to the first conductor portion 113 through a first via, and the second pad 112 is connected to the second conductor portion 114 through a second via, so that the first pad 111 is connected to the first conductor portion 113, and the second pad 112 is connected to the second conductor portion 114. The detection circuit is arranged on the front surface of the second circuit board 220, the third conductor part 231 and the fourth conductor part 232 are arranged on the back surface of the second circuit board 220, the thermistor is electrically connected with the detection circuit through the connection of the first conductor part 113 and the third conductor part 231, and the second conductor part 114 and the fourth conductor part 232, so that the resistance value of the thermistor can be detected by the detection circuit, a corresponding temperature value is obtained through calculation, and the detection of the temperature of the transformer module 100 is realized.
It should be understood that, by disposing the second circuit board 220 on the back side of the first circuit board 110, the area of the first circuit board 110 can be effectively reduced, and the volume of the transformer module 100 can be reduced, and because the second circuit board 220 is disposed on the back side of the first circuit board 110, the winding and the circuit on the front side of the first circuit board 110 are prevented from being covered, so that the heat dissipation effect on the front side of the first circuit board 110 is better.
In the above embodiment, the thermistor is disposed on the first surface of the first circuit board 110, and the thermistor is connected to the detection circuit of the detection module 200, and the resistance value of the thermistor detects the temperature of the first circuit board 110, so that the temperature of the planar transformer 10 can be detected, and the detection circuit is disposed on the second circuit board 220, so that the occupation of the space of the first circuit board 110 is avoided, the area of the first circuit board 110 is smaller, and the volume of the planar transformer 10 is effectively reduced.
In order to enable the heat of the winding to be conducted to the thermistor 210, in an embodiment, the first surface 108 of the first circuit board 110 is provided with a heat-conducting silica gel, the heat-conducting silica gel is disposed between the winding and the thermistor, and the heat-conducting silica gel at least partially covers the surface of the winding, the heat-conducting silica gel is connected to the thermistor, and in addition, in this embodiment, heat-conducting particles are dispersed in the heat-conducting silica gel, for example, the heat-conducting particles are metal particles, for example, the metal particles are aluminum alloy, zirconium alloy, titanium alloy, tungsten alloy or copper metal, so that only the heat conduction between the heat-conducting silica gel and the winding can be realized, the heat conduction efficiency is higher, the thermistor can detect the temperature change of the winding more accurately and timely, and in addition, the electric conduction of the heat-conducting silica gel can be avoided, because the heat-conducting silica gel covers the outer side of the heat-conducting particles, the connection between the metal heat conduction particles and the winding and the thermistor can be effectively avoided, and the conduction between the winding and the thermistor is avoided.
In one embodiment, the heat-conducting silica gel is coated on the outer side of the thermistor, and the heat-conducting silica gel is abutted or connected with the outer side surface of the thermistor, so that the heat conduction of the heat-conducting silica gel is more direct, and the thermistor can detect the temperature change of the winding more timely.
In order to realize the connection between the detection circuit and the third conductor 231 and the fourth conductor 232, in one embodiment, as shown in fig. 1 and 2, the detection circuit includes a detection chip 230 and a connection circuit printed on the second circuit board 220, the detection chip 230 is disposed on the first surface of the second circuit board 220, the connection circuit is printed on the first surface of the second circuit board 220 and electrically connected to the detection chip 230, the second circuit board 220 is provided with a third via and a fourth via, the connection circuit is electrically connected to the third conductor 231 through the third via, and the connection circuit is electrically connected to the fourth conductor 232 through the fourth via.
In this embodiment, the detection circuit is connected to the third conductor 231 and the fourth conductor 232 through the third via hole and the fourth via hole, so that the detection circuit on the front side is connected to the third conductor 231 and the fourth conductor 232 on the back side, and the detection circuit on the second circuit board 220 and the winding on the first circuit board 110 can be arranged opposite to each other, thereby effectively avoiding heat accumulation, and further improving the overall heat dissipation effect of the planar transformer 10.
In one embodiment, as shown in fig. 1 and 2, a sleeve hole 201 is formed in a middle portion of the second circuit board 220, and a portion of the magnetic core assembly 120 protruding from the second surface of the first circuit board 110 is located in the sleeve hole 201.
In this embodiment, the cross section of the trepan boring 201 is rectangular, and the cross sectional shape of the trepan boring 201 is matched with the cross sectional shape of the magnetic core assembly 120, so that the magnetic core assembly 120 can be disposed in the trepan boring 201, and further the second circuit board 220 can be closer to the first circuit board 110, and the magnetic core assembly 120 is prevented from being covered, thereby effectively improving the heat dissipation performance.
In one embodiment, please refer to fig. 1 and 2, the second circuit board 220 is at least partially offset from the first circuit board 110.
In this embodiment, the second circuit board 220 is partially aligned with the first circuit board 110, the aligned portion of the second circuit board 220 and the first circuit board 110 is connected to the first circuit board 110, the staggered position of the second circuit board 220 and the first circuit board 110 is favorable for heat dissipation, and the area of the staggered portion of the second circuit board 220 and the first circuit board 110 is larger than that of the aligned portion of the second circuit board 220 and the first circuit board 110, so that the second circuit board 220 can bear more electrical components and is favorable for heat dissipation of the second circuit board 220.
In order to realize the connection between the first pad 111 and the first via hole and the connection between the second pad 112 and the second via hole, in an embodiment, a first trench is formed on a first surface of the first circuit board 110 on one side of the first pad 111, a first connection conductor is disposed in the first trench, one end of the first connection conductor is connected to the first via hole, and one end of the first connection conductor is connected to the first pad 111.
In one embodiment, a second channel is formed on one side of the second pad 112 of the first surface of the first circuit board 110, a second connection conductor is disposed in the second channel, one end of the second connection conductor is connected to the second via hole, and one end of the second connection conductor is connected to the second pad 112.
In this embodiment, the first connection conductor is formed in the first trench by copper plating, and the second connection conductor is formed in the second trench by copper plating, so that the first pad 111 can be connected to the first connection conductor in the first trench, and the first pad 111 is connected to the second connection conductor in the second trench.
In one embodiment, the second side of the second circuit board 220 is connected to the second side of the first circuit board 110 through an adhesive layer.
In this embodiment, in order to realize the connection between the second circuit board 220 and the first circuit board 110, the first circuit board 110 is rectangular, the stacking plates 400 are disposed at four opposite corners of the second surface of the first circuit board 110, the thickness of the stacking plates 400 is greater than or equal to the height of the magnetic core assembly 120 protruding from the second surface of the first circuit board 110, or the thickness of the stacking plates 400 is half of the height of the second surface of the first circuit board 110, and the first circuit board 110 is connected to the second circuit board 220 through the stacking plates 400, so that the second circuit board 220 can be spaced from the first circuit board 110, and the first circuit board 110 and the second circuit board 220 can easily dissipate heat.
To enable the detection module 200 to be detached from the transformer module 100, in one embodiment, the second side of the second circuit board 220 is detachably connected to the second side of the first circuit board 110.
In the present embodiment, the detection module 200 is separated from the transformer module 100 by detaching the second circuit board 220 from the first circuit board 110, thereby enabling the transformer module 100 to be used alone and further reducing the volume of the transformer. It should be appreciated that when temperature sensing is not required, the second circuit board 220 can be detached from the first circuit board 110, resulting in a smaller volume and more flexibility of use of the transformer module 100 alone.
In order to facilitate the connection between the first circuit board 110 and the second circuit board 220 and facilitate the detachment of the first circuit board 110 and the second circuit board 220, in an embodiment, please refer to fig. 1 and 2, the first circuit board 110 is provided with a first mounting hole 115 and a second mounting hole 116, a second face of the second circuit board 220 is convexly provided with a first mounting post 225 and a second mounting post 226, the second face of the first circuit board 110 is provided with the first conductor portion 113 at an outer edge of the first mounting hole 115, the first conductor portion 113 is disposed around the first mounting hole 115, the second face of the first circuit board 110 is provided with the second conductor portion 114 at an outer edge of the second mounting hole 116, the second conductor portion 114 is disposed around the second mounting hole 116, the second face of the second circuit board 220 is provided with the third conductor portion 231 at an outer side of the first mounting post 225, the third conductor portion 231 is disposed around the first mounting post 225, the second face of the second circuit board 220 is provided with the fourth conductor portion 232 at an outer side of the second mounting post 226, the fourth conductor portion 232 is disposed around the second mounting post 226, the first mounting post 225 is movably inserted into the first mounting hole 115, and the second mounting post 226 is movably inserted into the second mounting hole 116, so that when the first mounting post 225 is inserted into the first mounting hole 115 and the second mounting post 226 is inserted into the second mounting hole 116, the first conductor portion 113 and the second conductor portion 114 can be connected to the third conductor portion 231 and the fourth conductor portion 232, and the first mounting post 225 and the second mounting post 226 can be aligned with the first mounting hole 115 and the second mounting hole 116, so that the first circuit board 110 and the second circuit board 220 can be aligned quickly, and the first circuit board 110 and the second circuit board 220 can be detached.
In order to facilitate the alignment of the first circuit board 110 and the second circuit board 220, in one embodiment, the first circuit board 110 is provided with at least one third mounting hole, and the second surface of the second circuit board 220 is convexly provided with at least one third mounting post, so that the alignment of the first circuit board 110 and the second circuit board 220 is facilitated by the alignment of the third mounting hole and the third mounting post. In one embodiment, each third mounting post is provided with a threaded structure, the planar transformer 10 further includes at least one nut, each third mounting post passes through the first circuit board 110 through a third mounting hole on the second surface of the first circuit board 110 and protrudes from the first surface of the first circuit board 110, each nut is screwed on the third mounting post and abuts against the first surface of the first circuit board 110, the first circuit board 110 and the second circuit board 220 are connected by matching the nut with the third mounting post, and the first circuit board 110 and the second circuit board 220 are more conveniently and quickly disassembled.
In one embodiment, the magnetic core assembly further includes a third magnetic core, the first magnetic core includes a first magnetic core body and an extension portion, the first magnetic core body and the extension portion are integrally connected, two ends and a middle portion of the first magnetic core body are respectively connected with the second magnetic core through three through holes, the second circuit board is provided with two serial holes, the extension portion and the third magnetic core are respectively located on two sides of the second circuit board, two ends of the extension portion are connected with the third magnetic core through the two serial holes, two windings on the first circuit board are a primary winding and a first secondary winding, the primary winding is coupled with the first secondary winding, the first secondary winding is electrically connected with a first output circuit on the first circuit board, and the first output circuit is used for outputting transformed electric energy; the second circuit board is provided with a second secondary winding and a third secondary winding, the second secondary winding and the third secondary winding are wound on the outer sides of the two series holes one by one, the second secondary winding and the third secondary winding are coupled with the primary winding respectively, the second circuit board is provided with a second output circuit, the second output circuit is used for outputting electric energy after voltage transformation, the second secondary winding and the third secondary winding are electrically connected with the second output circuit respectively, the detection circuit is used for controlling conduction between the second secondary winding and the second output circuit, and the detection circuit is used for controlling conduction between the third secondary winding and the second output circuit. In one embodiment, the detection circuit is configured to detect that the temperature of the thermistor is greater than a first preset temperature threshold, control conduction between the second secondary winding and/or the third secondary winding and the second output circuit, and control disconnection between the first secondary winding and the first output circuit, so that the first secondary winding is disconnected and stops working, and the second secondary winding and/or the third secondary winding operates, so that the first secondary winding and the corresponding circuit on the first circuit board may stop working when the temperature of the first secondary winding and the corresponding circuit on the first circuit board is higher, and perform voltage transformation by replacing the first secondary winding with the second secondary winding and/or the third secondary winding on the second circuit board, so that heat can be transferred, and overheating of the temperature of the first circuit board is avoided. In one embodiment, the detection circuit is configured to control disconnection between the second secondary winding and the second output circuit and conduction between the first secondary winding and the first output circuit when detecting that the temperature of the thermistor is less than a second preset temperature threshold, so that after the second secondary winding and the third secondary winding operate for a period of time and the temperature of the first secondary winding and the related circuits on the first circuit board decreases, the first secondary winding is switched to the first secondary winding again for voltage transformation, so that the windings on the first circuit board and the second circuit board operate alternately, and the temperature is prevented from being too high.
In order to enable the temperature detected by the transformer module 100 to be transmitted to the host or the terminal, in one embodiment, as shown in fig. 4, the detection module 200 further includes a communication unit 240, the communication unit 240 is electrically connected to the detection chip 230, the communication unit 240 is configured to transmit the temperature data detected by the detection chip 230 to the host or the terminal through a wireless signal, and in one embodiment, the communication module is one of a bluetooth unit, a WIFI unit, a near field communication unit 240, a 4G mobile communication unit 240, and a 5G mobile communication unit 240. In this way, communication with an external host and a terminal is established through the communication module, so that the temperature data detected by the detection chip 230 can be transmitted to the host or the terminal. In one embodiment, the planar transformer 10 is applied to a charger of a mobile phone, the planar transformer 10 is embedded in the charger, the detection chip 230 of the charger detects the temperature of the transformer module 100 through the thermistor, and the communication unit 240 establishes communication with the mobile phone, so that the charger can not only charge the mobile phone through the charging wire, but also transmit temperature data to the mobile phone. In one embodiment, when the charger is plugged into the socket, the transformer module 100 is powered on, the detection module 200 is powered on, the communication unit 240 of the detection module 200 is a bluetooth low energy unit, and the mobile phone is capable of detecting the temperature of the charger in real time by communicating with the bluetooth low energy unit of the detection module 200 through a bluetooth signal.
In one embodiment, as shown in fig. 4, the detection module 200 further includes an indication unit 250, the indication unit 250 is electrically connected to the detection chip 230, and the detection chip 230 is configured to control the indication unit 250 to operate to send out indication information when detecting that the temperature of the thermistor is greater than a preset temperature threshold. In an embodiment, the indication unit 250 is an indication lamp, and in an embodiment, the indication unit 250 is an LED (light emitting diode) indication lamp, so that when the temperature of the transformer module 100 is too high, the indication unit 250 can send information of temperature abnormality, for example, by lighting the indication lamp, to prompt a user.
In one embodiment, there is provided an electronic device comprising a modular planar transformer as described in any of the above embodiments.
In this embodiment, the electronic device may be a mobile phone, a tablet computer, a notebook computer, or an intelligent wearable device, and the intelligent wearable device may be a watch, an electronic wrist guard, or the like. This electronic equipment includes electronic equipment body and charger, is provided with the interface that charges on the electronic equipment body, and the charger has the charging wire, and the end of charging wire sets up the joint that charges, and the interface that charges is inserted and is located in the interface that charges for electronic equipment body is connected with the charger electricity, sets up this modularization planar transformer in this charger.
In this embodiment, through set up thermistor on the first face of first circuit board to be connected thermistor and detection module's detection circuitry, the temperature of first circuit board is detected to the resistance through thermistor, thereby can realize detecting the temperature of planar transformer, through setting up detection circuitry on the second circuit board, avoids occupying the space of first circuit board, makes the area of first circuit board littleer, makes the volume of planar transformer effectively reduce.
In addition, in this embodiment, the electronic device body can also communicate with the planar transformer built in the charger, so as to obtain temperature data, and the temperature data of the charger is displayed on the display screen of the electronic device body. In one embodiment, the detection module further comprises a communication unit, the communication unit is electrically connected with the detection chip, and the communication unit is used for sending the temperature data detected by the detection chip to the electronic device body through a wireless signal. The detection chip of the charger detects the temperature of the transformer module through the thermistor, and the communication with the mobile phone is established through the communication unit, so that the charger can charge the mobile phone through the charging wire and can send temperature data to the mobile phone. In one embodiment, the electronic device body is a mobile phone, when the charger is plugged into the socket, the transformer module is powered on, the detection module is powered on, the communication unit of the detection module is a low-power-consumption Bluetooth unit, the mobile phone is communicated with the low-power-consumption Bluetooth unit of the detection module through a Bluetooth signal, and the mobile phone can detect the temperature of the charger in real time. Like this, at the cell-phone in the charging process, the screen not only can show the present electric quantity of cell-phone and the progress of charging, can also show the temperature of charger to make the user can in time look over the temperature of charger, in time discover the unusual of charger, avoid because the accident that the charger temperature is unusual and lead to.
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 invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A modular planar transformer, comprising: the device comprises a transformer module and a detection module;
the transformer module comprises a first circuit board and a magnetic core assembly, wherein three through holes are formed in the first circuit board, the magnetic core assembly penetrates through each through hole, the magnetic core assembly is coated on two sides of the first circuit board, a first surface on the first circuit board is provided with a first bonding pad, a second bonding pad and two windings in a printing mode, each winding is wound on the outer side of one through hole, the first bonding pad and the second bonding pad are arranged on the outer sides of one winding, a second surface on the first circuit board is provided with a first conductor part and a second conductor part, the first circuit board is provided with a first through hole and a second through hole, the first bonding pad is connected with the first conductor part through the first through hole, and the second bonding pad is connected with the second conductor part through the second through hole;
the detection module comprises a thermistor, a second circuit board and a detection circuit, wherein the thermistor is arranged on the first circuit board, one end of the thermistor is connected with the first bonding pad, the other end of the thermistor is connected with the second bonding pad, the detection circuit is arranged on the first surface of the second circuit board, the second surface of the second circuit board is provided with a third conductor part and a fourth conductor part which are electrically connected with the detection circuit, the second surface of the second circuit board is connected with the second surface of the first circuit board, the third conductor part is connected with the first conductor part, and the fourth conductor part is connected with the second conductor part;
the magnetic core assembly comprises a first magnetic core and a second magnetic core, the first magnetic core and the second magnetic core are respectively positioned at two sides of the first circuit board, the magnetic core assembly further comprises a third magnetic core, the first magnetic core comprises a first magnetic core body and an extension portion, the first magnetic core body is integrally connected with the extension part, two ends and the middle part of the first magnetic core body respectively penetrate through the three through holes to be connected with the second magnetic core, the second circuit board is provided with two serial holes, the extension part and the third magnetic core are respectively positioned at two sides of the second circuit board, two ends of the extension part penetrate through the two serial holes to be connected with the third magnetic core, the two windings on the first circuit board are a primary winding and a first secondary winding, the primary winding is coupled with the first secondary winding, and the first secondary winding is electrically connected with a first output circuit on the first circuit board; the second circuit board is provided with a second secondary winding and a third secondary winding, the second secondary winding and the third secondary winding are wound on the outer sides of the two serial holes one by one, the second secondary winding and the third secondary winding are coupled with the primary winding respectively, the second circuit board is provided with a second output circuit, the second secondary winding and the third secondary winding are electrically connected with the second output circuit respectively, the detection circuit is used for detecting that the temperature of the thermistor is higher than a first preset temperature threshold value, controlling the conduction between the second secondary winding and/or the third secondary winding and the second output circuit and controlling the disconnection between the first secondary winding and the first output circuit.
2. The modular planar transformer of claim 1, wherein the detection circuit comprises a detection chip and a connection circuit printed on the second circuit board, the detection chip is disposed on the first surface of the second circuit board, the connection circuit is printed on the first surface of the second circuit board, and the connection circuit is electrically connected to the detection chip, the second circuit board is provided with a third via hole and a fourth via hole, the connection circuit is electrically connected to the third conductor portion through the third via hole, and the connection circuit is electrically connected to the fourth conductor portion through the fourth via hole.
3. The modular planar transformer of claim 1, wherein the second circuit board is at least partially offset from the first circuit board.
4. The modular planar transformer of claim 1, wherein the first surface of the first circuit board is provided with a first channel on one side of the first pad, the first channel is provided with a first connection conductor, one end of the first connection conductor is connected to the first via hole, and one end of the first connection conductor is connected to the first pad.
5. The modular planar transformer of claim 1, wherein a second channel is formed in the first surface of the first circuit board on one side of the second pad, a second connecting conductor is disposed in the second channel, one end of the second connecting conductor is connected to the second via hole, and one end of the second connecting conductor is connected to the second pad.
6. A modular planar transformer according to any one of claims 1 to 5, wherein the second side of the second circuit board is connected to the second side of the first circuit board by an adhesive layer.
7. A modular planar transformer according to any one of claims 1 to 5, wherein the second side of the second circuit board is removably attached to the second side of the first circuit board.
8. The modular planar transformer of claim 2, wherein the detection module further comprises a communication unit electrically connected to the detection chip, the communication unit being configured to transmit the temperature data detected by the detection chip to a host or a terminal via a wireless signal.
9. An electronic device, characterized in that it comprises a modular planar transformer as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111224043.4A CN113658785B (en) | 2021-10-21 | 2021-10-21 | Modular planar transformer and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111224043.4A CN113658785B (en) | 2021-10-21 | 2021-10-21 | Modular planar transformer and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113658785A CN113658785A (en) | 2021-11-16 |
| CN113658785B true CN113658785B (en) | 2022-02-08 |
Family
ID=78484322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111224043.4A Active CN113658785B (en) | 2021-10-21 | 2021-10-21 | Modular planar transformer and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113658785B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005278339A (en) * | 2004-03-25 | 2005-10-06 | Denso Corp | Electronic circuit device comprising heat sink |
| JP2009216550A (en) * | 2008-03-11 | 2009-09-24 | Hanshin Electric Co Ltd | Correction value inspection method of thermistor for heating detection, and control method of device equipped with thermistor for heating detection |
| JP2015108543A (en) * | 2013-12-04 | 2015-06-11 | 株式会社デンソー | Temperature detection device |
| CN105869855A (en) * | 2016-05-20 | 2016-08-17 | 浙江求缺科技有限公司 | Planar transformer with double-column magnetic core structure |
| CN205487664U (en) * | 2016-01-18 | 2016-08-17 | 上海继胜磁性材料有限公司 | Backlight and PCB transformer of TV set |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020003268A (en) * | 2018-06-26 | 2020-01-09 | 株式会社オートネットワーク技術研究所 | Substrate structure |
-
2021
- 2021-10-21 CN CN202111224043.4A patent/CN113658785B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005278339A (en) * | 2004-03-25 | 2005-10-06 | Denso Corp | Electronic circuit device comprising heat sink |
| JP2009216550A (en) * | 2008-03-11 | 2009-09-24 | Hanshin Electric Co Ltd | Correction value inspection method of thermistor for heating detection, and control method of device equipped with thermistor for heating detection |
| JP2015108543A (en) * | 2013-12-04 | 2015-06-11 | 株式会社デンソー | Temperature detection device |
| CN205487664U (en) * | 2016-01-18 | 2016-08-17 | 上海继胜磁性材料有限公司 | Backlight and PCB transformer of TV set |
| CN105869855A (en) * | 2016-05-20 | 2016-08-17 | 浙江求缺科技有限公司 | Planar transformer with double-column magnetic core structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113658785A (en) | 2021-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6663420B1 (en) | Adapter for exchanging data and transmitting power between PC and portable device | |
| TW501326B (en) | Electric equipment with backup battery-stand powered by host machine power source | |
| US20110175567A1 (en) | Power mouse pad | |
| KR20130125848A (en) | Magnetic power connecter and power supply using the same | |
| US20150188354A1 (en) | Intergrally encapsulated wireless charging device | |
| CN113658785B (en) | Modular planar transformer and electronic equipment | |
| US20220209567A1 (en) | Earphone charging case with adapter function | |
| JP4851586B2 (en) | Universal power supply device | |
| CN110958771B (en) | Integrated circuit board and electronic equipment | |
| CN209748557U (en) | bluetooth adapter | |
| TWM425379U (en) | Integrated magnetic assembly | |
| WO2017088543A1 (en) | Multifunction charging socket | |
| EP2819021A1 (en) | Wireless communication terminal | |
| CN211530270U (en) | Magnetic positioning wall-adhering interface convenient for insertion | |
| WO2021208811A1 (en) | Mobile terminal | |
| CN205159721U (en) | USB -Type -C interface converter | |
| US10754805B1 (en) | USB adapter | |
| CN201142371Y (en) | USB hub | |
| CN209692414U (en) | A kind of intelligent charger | |
| CN215528631U (en) | Wireless charging circuit board and wireless charger based on SOC | |
| CN219204141U (en) | Charger (charger) | |
| CN209767243U (en) | Wireless charging device with detachable base | |
| CN216121822U (en) | Wireless charging circuit structure and charger | |
| CN216134295U (en) | Portable power source with Lightning female seat | |
| CN215221203U (en) | Charging seat of multi-electronic device with magnetic connector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |