WO2023134727A1

WO2023134727A1 - Switching power supply and socket

Info

Publication number: WO2023134727A1
Application number: PCT/CN2023/071913
Authority: WO
Inventors: 廖忠明
Original assignee: 安克创新科技股份有限公司
Priority date: 2022-01-14
Filing date: 2023-01-12
Publication date: 2023-07-20

Abstract

The present application discloses a switching power supply and a socket. The switching power supply comprises a circuit board and a transformer assembly installed on the circuit board. The transformer comprises a magnetic core, a first framework, a second framework, a first transformer winding and a second transformer winding. The magnetic core comprises a main body, a first magnetic column and a second magnetic column. The first magnetic column and the second magnetic column are connected to the main body. The first framework is sleeved on the first magnetic column, and the second framework is sleeved on the second magnetic column. The first transformer winding is wound on the first framework and is used for introducing a first current and outputting a second current. The second transformer winding is wound on the second framework and is used for introducing a third current and outputting a fourth current. The second current and the fourth current are output at the same time. By means of integrating two transformers, and allowing the two transformers to share one magnetic core, the space occupied by the transformers in the switching power supply can be compressed, so that a miniaturization design of the switching power supply can be realized, and the size of the switching power supply is reduced.

Description

A switching power supply and socket

This application claims the priority of the Chinese patent application with the application number 202220092787.9 and the title of the invention "a switching power supply and socket" submitted to the China Patent Office on January 14, 2022, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the technical field of electronic components, in particular to a switch component and a socket.

Background technique

In order to enhance the user experience of end users, switching power supplies need to be developed in the direction of miniaturization and high power density. Transformers are important magnetic components in switching power supplies. In related technologies, switching power supplies generally have multiple transformers, and the size of the transformers is relatively large. The size of the switching power supply is also larger.

Utility model content

The embodiment of the present application provides a switching power supply and a socket, which can solve the problem in the related art that the size of the transformer is relatively large, resulting in a large size of the switching power supply.

The first aspect of the embodiment of the present application provides a switching power supply, including a circuit board and a transformer assembly mounted on the circuit board, the transformer assembly includes: a magnetic core, including a main body, a first magnetic column, and a second magnetic column, The first magnetic column and the second magnetic column are connected to the main body, and the first magnetic column and the second magnetic column are arranged at intervals along a first preset direction; the first skeleton is sleeved on On the first magnetic column; the second frame is sleeved on the second magnetic column; the first transformer winding is wound on the first frame, and is configured to pass in the first current and output the second current ; The second transformer winding is wound on the second bobbin, and is configured to pass in a third current and output a fourth current, and output the second current and the fourth current simultaneously.

The second aspect of the embodiment of the present application provides a socket. The socket includes a base body and a switching power supply. The switching power supply is arranged on the base body. The switching power supply includes a circuit board and a transformer assembly mounted on the circuit board. , the transformer assembly includes: a magnetic core including a main body, a first magnetic post and a second magnetic post, the first magnetic post and the second magnetic post are connected to the main body, and the first magnetic post and the second magnetic post are connected to the main body. The second magnetic columns are arranged at intervals along the first preset direction; the first skeleton is sleeved on the first magnetic column; the second skeleton is sleeved on the second magnetic column; the first transformer winding , wound on the first bobbin, set to pass in the first current and output the second current; the second transformer winding, wound on the second bobbin, set to pass in the third current and output the fourth current, the second current and the fourth current are output simultaneously.

The beneficial effect of the application is: use two transformers with small volume and thickness to meet the power requirements of the switching power supply, and integrate the two transformers, the two transformers share a magnetic core, and the traditional two transformers can be combined into two 1. Integrate the two magnetic circuits into the same magnetic circuit to compress the space occupied by the transformer in the switching power supply, so that the miniaturization design of the switching power supply can be realized, the size of the switching power supply can be reduced, and the high power density of the switching power supply can be realized at the same time design.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or related technologies. Obviously, the accompanying drawings in the following description are only For some embodiments of the application, those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is an exploded schematic diagram of a transformer assembly in an embodiment of the present application;

Fig. 2 is a schematic diagram of the corresponding stacking of the first magnet and the second magnet in an embodiment of the present application;

FIG. 3 is a schematic diagram of a topology structure of a switching power supply in an embodiment of the present application;

Fig. 4 is a structural schematic diagram of the first transformer winding, the second transformer winding, the first magnetic column and the second magnetic column in an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a first magnet, a first magnetic column, a second magnetic column and an auxiliary magnetic column in an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a first skeleton in an embodiment of the present application;

Fig. 7 is a structural schematic diagram of another viewing angle of the first skeleton in an embodiment of the present application;

8 is a cross-sectional view of the first secondary winding of the first transformer winding wound on the winding post in the related art;

9 is a cross-sectional view of the first secondary winding of the first transformer winding wound on the winding post in an embodiment of the present application;

Fig. 10 is a top view of the first skeleton in an embodiment of the present application;

Fig. 11 is a side view of the first framework in an embodiment of the present application.

Reference signs:

11, magnetic core; 111, main body; 111a, first magnet; 111b, second magnet; 112, first magnetic column; 112a, first split body; 112b, second split body; 113, second magnetic column; 113a , third split body; 113b, fourth split body; 114, auxiliary magnetic column; 12, first skeleton; 121, first through hole; 122, winding post; 1221, axis; 123, baffle plate; 1231, inner 1232, outer side; 1233, peripheral side; 124, accommodating space; 125, primary wire accommodating groove; 1251, groove bottom; 126, secondary wire accommodating groove; 127, magnetic core accommodating groove; 128, Jack; 13, the second skeleton; 131, the second through hole; 14, the first transformer winding; 141, the first primary winding; 142, the first secondary winding; 143, the first auxiliary winding; 15, the second transformer Winding; 151, second primary winding; 152, second secondary winding; 153, second auxiliary winding; 21, first switch unit; 22, second switch unit; 30, control unit; 41, first detection unit; 42. The second detection unit; 51. The first diode; 52. The second diode.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

The present application provides a switching power supply and a socket, which are used to solve the problem in the related art that the size of the transformer is relatively large, resulting in a large size of the switching power supply.

The application provides a switching power supply, as shown in Figure 1 and Figure 2, the switching power supply includes a circuit board (not shown in the figure) and a transformer assembly, the transformer assembly is installed on the circuit board, and the circuit board can be set to control the operation of the transformer assembly , the circuit board can be a single-sided board, double-sided board or multi-layer board, and the application does not specifically limit the type, model and size of the circuit board.

Continue referring to FIG. 1 and FIG. 2 , the transformer assembly includes a magnetic core 11 , a first bobbin 12 , a second bobbin 13 , a first transformer winding 14 and a second transformer winding 15 .

Specifically, the magnetic core 11 includes a main body 111, a first magnetic column 112 and a second magnetic column 113, the first magnetic column 112 and the second magnetic column 113 are connected to the main body 111, and the first magnetic column 112 and the second magnetic column 113 are connected to the main body 111, and the first magnetic column 112 A magnetic column 112 and the second magnetic column 113 are arranged at intervals along a first predetermined direction AA.

Wherein, the main body 111 includes a first magnet 111a and a second magnet 111b, the overall shape of the first magnet 111a and the second magnet 111b may be "]", and the first magnet 111a and the second magnet 111b are stacked correspondingly, Of course, according to actual needs, the overall shape of the first magnet 111a and the second magnet 111b can also be other shapes, which are not specifically limited in this application; the first magnetic column 112 and the second magnetic column 113 are arranged between the first magnet 111a and Between the second magnets 111b, the two ends of the first magnetic column 112 are respectively connected with the first magnet 111a and the second magnet 111b, and the two ends of the second magnetic column 113 are respectively connected with the first magnet 111a and the second magnet 111b. A magnet 111a, a second magnet 111b, a first magnetic leg 112 and a second magnetic leg 113 form a closed magnetic core 11 of the transformer assembly.

It should be noted that the first magnetic column 112 can be integrally formed, and the second magnetic column 113 can also be integrally formed; of course, the first magnetic column 112 can also include a first split body 112a and a second split body 112b, The second magnetic column 113 may also include a third split body 113a and a fourth split body 113b, the first split body 112a and the third split body 113a are connected to the first magnet 111a, and the second split body 112b and the fourth split body 113b are connected to the first magnet body 111a. The second magnet 111b is connected, and the first sub-body 112a and the second sub-body 112b are stacked correspondingly to form the first magnetic column 112, and the third sub-body 113a and the fourth sub-body 113b are stacked correspondingly to form the second magnetic column 113 .

Continue referring to Fig. 1 and Fig. 2, the first frame 12 is sleeved on the first magnetic column 112, the second frame 13 is sleeved on the second magnetic column 113, and the first transformer winding 14 is wound on the On the first bobbin 12, the second transformer winding 15 is wound on the second bobbin 13 (as shown in FIG. 4 ).

Wherein, the first skeleton 12 has a first through hole 121, and the first magnetic column 112 is inserted into the first through hole 121, and the shape of the first through hole 121 is The shape can match the shape of the first magnetic column 112, the first skeleton 12, the first magnetic column 112 and the first transformer winding 14 are part of the first transformer; the second skeleton 13 has a second through hole 131, and the second magnetic column 113 is inserted into the second through hole 131, the shape of the second through hole 131 can match the shape of the second magnetic column 113, the second skeleton 13, the second magnetic column 113 and the second transformer winding 15 belong to the second transformer part.

It can be understood that the first transformer and the second transformer share the same magnetic core 11, the traditional two transformers can be combined into one, the two magnetic circuits can be integrated into the same magnetic circuit, and the transformer occupied by the switching power supply can be compressed. Therefore, the miniaturized design of the switching power supply can be realized and the size of the switching power supply can be reduced.

It should also be noted that Fig. 1 and Fig. 2 only show schematic diagrams of integrating two transformers, and three, four or more transformers may also be integrated together according to actual needs.

As shown in FIG. 3 , the first transformer winding 14 is configured to feed in a first current I1 and output a second current I2, and the second transformer winding 15 is configured to feed in a third current I3 and output a fourth current I4, The second current I2 and the fourth current I4 are output simultaneously.

Wherein, the first current I1 and the third current I3 can be alternating current, the second current I2 and the fourth current I4 can be direct current, that is, the first transformer winding 14 and the second transformer winding 15 can be applied to two-way AC-DC conversion circuits In this case, the switching power supply is an AC switching power supply. The magnitude of the first current I1 and the magnitude of the third current I3 may be the same or different, and the magnitude of the second current I2 and the magnitude of the fourth current I4 may be the same or different. Specific values of the third current I3 and the fourth current I4 are not limited.

It is understandable that, taking a switching power supply that requires 100W of power as an example, if only one transformer is used to meet the power demand of a switching power supply of 100W, a transformer with a large volume and thickness is required, which will lead to a large thickness and volume of the switching power supply. .

However, in this application, two or more transformers are used to meet the power requirements of the switching power supply, such as dividing a 100W transformer into two transformers, and the power of the two transformers is 65W and 35W respectively, and the two transformers output simultaneously operating current, so that two transformers with smaller volume and thickness can be used to meet the power requirements of the switching power supply (65W+35W=100W), and the two transformers are integrated, and the two transformers share a magnetic core 11, which can realize switching On the basis of the miniaturized design of the power supply, the high power density design of the switching power supply is realized.

As shown in Fig. 3 and Fig. 4, in some embodiments of the present application, the first transformer winding 14 includes a first primary winding 141 and a first secondary winding 142, and the first primary winding 141 and the first The secondary windings 142 are arranged at intervals, the input end of the first primary winding 141 is set to pass through the first current I1, and the output end of the first secondary winding 142 is set to output the second current I2; The second transformer winding 15 includes a second primary winding 151 and a second secondary winding 152, the second primary winding 151 and the second secondary winding 152 are arranged at intervals, and the input end of the second primary winding 151 is arranged To pass in the third current I3, the output end of the first secondary winding 142 is set to output the fourth current I4.

Wherein, the first primary winding 141 and the first secondary winding 142 are both wound on the first frame 12, the first primary winding 141 is set to pass through the first current I1, and the first secondary winding 142 is based on the principle of electromagnetic induction Generate and output the second current I2; the second primary winding 151 and the second secondary winding 152 are wound on the second bobbin 13, the second primary winding 151 is used to feed the third current I3, the second secondary The winding 152 generates and outputs a fourth current I4 according to the principle of electromagnetic induction.

Continuing to refer to FIG. 3 and FIG. 4 , in an embodiment of the present application, the switching power supply further includes a first switching unit 21 , a second switching unit 22 and a control unit 30 .

Wherein, the first end of the first switch unit 21 is electrically connected to the output end of the first primary winding 141, and the first end of the second switch unit 22 is electrically connected to the output end of the second primary winding 151. connection; the control unit 30 is electrically connected to the control terminal of the first switch unit 21 and the control terminal of the second switch unit 22, and is configured to control the first switch unit 21 and the second switch unit 22 to start simultaneously close.

It should be noted that the first switch unit 21 and the second switch unit 22 can be devices with on-off control circuits such as mos switch tubes or triodes, and the control unit 30 can be devices with control functions such as single-chip microcomputers; in this application, through The control unit 30 controls the first switch unit 21 and the second switch unit 22 to be turned on and off simultaneously, so as to control the first transformer winding 14 to output the second current I2 and the second transformer winding 15 to output the fourth current I4.

Continue referring to Fig. 3 and Fig. 4, in an embodiment of the present application, the switching power supply further includes a first detection unit 41 and a second detection unit 41 Detection unit 42.

The first detection unit 41 is electrically connected to the output end of the first primary winding 141, and is configured to detect the output current of the first primary winding 141; the second detection unit 42 is connected to the output of the second primary winding 151 The terminals are electrically connected and configured to detect the current output by the second primary winding 151 .

Wherein, the first detection unit 41 and the second detection unit 42 can be current detection devices such as current transformers or current detection chips, and can detect the current output by the first primary winding 141 and the second secondary winding 152 in real time, so as to to current protection and current limiting.

Continue referring to FIG. 3 and FIG. 4 , in an embodiment of the present application, the first transformer winding 14 further includes a first auxiliary winding 143, the first auxiliary winding 143 is connected to the first primary winding 141 and the The first secondary winding 142 is arranged at intervals; the second transformer winding 15 also includes a second auxiliary winding 153, and the second auxiliary winding 153 is spaced apart from the second primary winding 151 and the second secondary winding 152 set up.

Wherein, the first end of the first auxiliary winding 143 is electrically connected to the ground terminal, and the second end of the first auxiliary winding 143 is electrically connected to the first detection unit 41, which is used to provide the first detection unit 41 provides an operating current; the first end of the second auxiliary winding 153 is electrically connected to the ground end, and the second end of the second auxiliary winding 153 is electrically connected to the second detection unit 42 for providing the first The second detection unit 42 provides working current.

It should be noted that the first auxiliary winding 143 is wound on the first bobbin 12, and the second auxiliary winding 153 is wound on the second bobbin 13. When the first primary winding 141 receives the first current I1, the first auxiliary winding 153 The winding 143 will generate current due to the electromagnetic induction phenomenon, so as to provide the working current for the first detection unit 41; when the first primary winding 141 is connected to the third current I3, the second auxiliary winding 153 will generate current due to the electromagnetic induction phenomenon, thereby An operating current may be provided for the second detection unit 42 .

Further, referring to FIG. 3 and FIG. 4 , the switching power supply may further include a first diode 51 and a second diode 52 .

Wherein, the first diode 51 is connected in series between the first auxiliary winding 143 and the ground terminal, the cathode of the first diode 51 is electrically connected to the first end of the first auxiliary winding 143, and the The anode of the first diode 51 is electrically connected to the ground; the second diode 52 is connected in series between the second auxiliary winding 153 and the ground, and the cathode of the second diode 52 is connected to the first The first ends of the two auxiliary windings 153 are electrically connected, and the anode of the second diode 52 is electrically connected to the ground. Utilizing the unidirectional conductivity of the diode, the alternately changing alternating current can be converted into a single direct direct current, so that the alternating current generated by the first auxiliary winding 143 and the second auxiliary winding 153 due to electromagnetic induction becomes direct current, thereby providing the first detection The unit 41 and the second detection unit 42 are powered.

As shown in FIG. 4 , the direction of the first current I1 is the same as that of the second current I2 , and the winding direction of the first transformer winding 14 and the second transformer winding 15 may be opposite.

It should be noted that there is a space between the first transformer winding 14 and the second transformer winding 15. Due to the limitation of the volume, the size of the space is also very small, which makes the first transformer where the first magnetic column 112 is located produce the first transformer. A magnetic flux and the second magnetic flux generated by the second transformer where the second magnetic column 113 is located partially overlap at the interval area. Those skilled in the art know that when the winding direction of the first transformer winding 14 and the second transformer winding 15 On the contrary, the direction of the first current I1 fed into the first transformer winding 14 can be made to be the same as the direction of the third current I3 fed into the second transformer winding. At this time, the first magnetic flux is opposite to the second magnetic flux direction, thereby The first magnetic flux and the second magnetic flux are eliminated at the gap, thereby reducing magnetic loss and improving efficiency.

Of course, it can also be set that the direction of the first current I1 is opposite to the direction of the second current I2, and the winding direction of the first transformer winding 14 and the second transformer winding 15 are the same, so that the first The magnetic flux cancels with the second magnetic flux at the gap.

As shown in FIG. 5 , in an embodiment of the present application, the maximum length of the first magnetic column 112 along the first preset direction AA is a1, and the first magnetic column 112 is along the second preset direction BB. The maximum length is b1, the a1 is smaller than the b1, the second preset direction BB is perpendicular to the first preset direction AA, and the second preset direction BB is perpendicular to the first magnetic column The end surface of 112 and the end surface of the second magnetic column 113 are arranged in parallel.

It should be noted that, as known to those skilled in the art, the power of the transformer is related to the cross-sectional area of the corresponding magnetic column. Generally speaking, the larger the cross-sectional area of the corresponding magnetic column, the greater the power of the transformer. The specific working principle of the transformer It has already been disclosed in the related art, and the present application does not repeat it.

In the present application, the first magnetic column 112 and the second magnetic column 113 are arranged along the first preset direction AA, and the length of the first magnetic column 112 in the first preset direction AA is relatively small, while in the second preset direction The length of BB is relatively large, so as to ensure that the cross-sectional area of the first magnetic column 112 remains unchanged Basically, reducing the width occupied by the first magnetic column 112 in the first preset direction AA can further reduce the width of the transformer assembly along the first preset direction AA, so as to further reduce the size of the switching power supply.

Wherein, the shape of the cross section of the first magnetic column 112 can be ellipse, of course, according to actual needs, the shape of the cross section of the first magnetic column 112 can also be rectangular, trapezoidal or other shapes. The area of the cross section of the first magnetic column 112 can also be selected according to actual needs, which is not specifically limited in this application.

Continuing to refer to FIG. 5 , in an embodiment of the present application, the maximum length of the second magnetic column 113 along the first preset direction AA is a2, and the second magnetic column 113 along the second preset direction Let the maximum length of direction BB be b2, said a2 is equal to said b2, so that the second magnetic flux generated by the second transformer where the second magnetic column 113 is located can be evenly distributed in all directions.

Wherein, the shape of the cross section of the second magnetic column 113 can be a circle, of course, according to actual needs, the shape of the cross section of the second magnetic column 113 can also be a square or a regular pentagon. The area of the cross section of the second magnetic column 113 can also be selected according to actual needs, which is not specifically limited in this application.

In an embodiment of the present application, the height of the magnetic core 11 along the third predetermined direction CC is less than or equal to 18 millimeters (as shown in FIG. 2 ), and the height of the third predetermined direction CC and the first magnetic column 112 The end faces are arranged vertically, and the third predetermined direction CC is parallel to the thickness direction of the magnetic core 11, so that the transformer assembly is highly compatible with the SMD (Surface Mounted Devices, Surface Mounted Devices) on the circuit board, realizing the miniaturization design of the switching power supply.

Continuing to refer to FIG. 5 , in an embodiment of the present application, the magnetic core 11 further includes an auxiliary magnetic column 114 , and the auxiliary magnetic column 114 is located between the first magnetic column 112 and the second magnetic column 113 During this period, the auxiliary magnetic column 114 can increase the effective cross-sectional area of the magnetic core 11 to increase the maximum power of the transformer assembly.

As shown in FIGS. 6-7 , the first frame 12 includes a winding post 122 and two baffles 123 .

The winding post 122 is used as a winding support in the first frame 12, and the winding post 122 is at least configured to wind the first primary winding 141 of the first transformer winding 14 (as shown in FIG. 3 ). Of course, the winding post 122 can also be The first secondary winding 142 of the first transformer winding 14 (shown in FIG. 3 ) is wound. It can be understood that, when the transformer assembly is a step-up transformer, the wire diameter of the first primary winding 141 of the first transformer winding 14 wound on the winding post 122 is larger than that of the first secondary winding 142 of the first transformer winding 14 Wire diameter, when the transformer assembly is a step-down transformer, the wire diameter of the first primary winding 141 of the first transformer winding 14 wound on the winding post 122 is smaller than the wire diameter of the first secondary winding 142 of the first transformer winding 14 path.

The winding post 122 has an axis 1221 , for example, when the winding post 122 is cylindrical, the centerline of the cylinder is the axis 1221 of the winding post 122 .

The baffle plate 123 is used as a part for carrying the magnetic core 11 of the transformer assembly in the first skeleton 12, the number of the baffle plate 123 is two, and the shapes of the two baffle plates 123 can be the same or different, here the two baffle plates 123 The specific shape is not limited, and designers can make reasonable designs according to actual needs.

The two baffles 123 are connected to both sides of the winding post 122 along the axis 1221 of the winding post 122 . For example, the two baffles 123 can be integrally formed on both sides of the winding post 122 by injection molding. The materials of the baffle plate 123 and the winding post 122 are not limited here, and designers can make reasonable choices according to actual needs. For example, when the baffle plate 123 and the winding post 122 are integrally formed, the baffle plate 123 and the winding post 122 The material can be but not limited to resin, plastic or rubber.

The two baffles 123 and the winding posts 122 surround and form an accommodating space 124 for accommodating the first primary winding 141 of the first transformer winding 14, that is, the two baffles 123 sandwich the winding posts 122 in the middle The first frame 12 forming a similar "I-shaped" structure, the hollow part formed by the two baffles 123 and the winding post 122 is the above-mentioned accommodating space 124 .

The inner surface 1231 of any baffle plate 123 connected to the winding post 122 is provided with at least one primary wire accommodating groove 125, that is, only one of the two baffle plates 123 is provided with a primary wire accommodating groove 125, and the primary wire accommodating groove 125 is provided. The wire accommodating groove 125 is located on the side of the baffle plate 123 close to the winding post 122, and the number of the primary wire accommodating groove 125 can be one or more. When the number of the primary wire accommodating groove 125 is multiple, The plurality of primary wire accommodating grooves 125 may be distributed on one side of the baffle plate 123, of course, the plurality of primary wire accommodating grooves 125 may also be distributed on two opposite sides of the baffle plate 123. side. Here, there is no limitation on the processing method of the primary wire accommodating groove 125, and designers can make reasonable choices according to actual needs. For example, the above-mentioned primary wire accommodating groove can be formed on the inner surface 1231 of the baffle plate 123 by using processes such as grinding and cutting. 125 , the above-mentioned primary wire accommodating groove 125 may also be formed on the inner surface 1231 of the baffle 123 by injection molding.

The primary wire accommodating slot 125 is set to accommodate part of the outlet section of the first primary winding 141 of the first transformer winding 14, that is, the outlet section of the first primary winding 141 of the first transformer winding 14 passes through the above-mentioned primary wire accommodating slot 125 and partially embedded in the baffle plate 123, wherein, "the outgoing line section of the first primary winding 141" can be understood as the redundant section of the first primary winding 141 of the first transformer winding 14 that is not wound on the winding post 122 part.

By setting at least one primary wire accommodating groove 125 on the inner surface 1231 of any baffle plate 123, after the first primary winding 141 of the first transformer winding 14 is wound by the winding post 122, the first primary winding 141 of the first transformer winding 14 141 is embedded in the baffle plate 123 through the primary wire accommodating slot 125, and the overall size of the first skeleton 12 is reduced by reducing the space occupation rate of the outlet section of the first primary winding 141 of the first transformer winding 14. The purpose of the volume, so as to realize the miniaturization design of the switching power supply.

As shown in FIGS. 6-7 , considering that after the first primary winding 141 of the first transformer winding 14 is wound through the winding post 122 , the outlet section of the first primary winding 141 of the first transformer winding 14 is along the winding post 122 . Extend radially and partly pass through the primary wire accommodating groove 125 to be pulled to the end connected with the circuit board of the switching power supply or the pin body of the transformer assembly. When the transformer assembly is a step-down transformer, the wire diameter of the first primary winding 141 of the first transformer winding 14 is relatively small, in order to avoid the breakage of the outlet section of the first primary winding 141 of the first transformer winding 14 during the bending process Therefore, it is further designed that the primary wire accommodating groove 125 runs through the peripheral side surface 1233 of the baffle plate 123 from the inner surface 1231 of the baffle plate 123, and the groove bottom surface 1251 of the primary wire accommodating groove 125 is inclined relative to the axis 1221 of the winding post 122 From the inner surface 1231 of the baffle 123 to the peripheral surface 1233 of the baffle 123 , the vertical distance between the groove bottom 1251 of the primary wire accommodating groove 125 and the axis 1221 of the winding post 122 gradually increases. That is to say, the primary line accommodating groove 125 has a groove bottom surface 1251 facing the other baffle plate 123, from the side close to the other baffle plate 123 to the side away from the other baffle plate 123, the primary wire accommodating groove 125 The vertical distance between the groove bottom surface 1251 and the axis 1221 of the winding post 122 gradually increases, and the groove bottom surface 1251 of the primary wire accommodating groove 125 extends from the side close to the other baffle plate 123 to the inner surface 1231 of the baffle plate 123 where it is located. Above, the bottom surface 1251 of the primary wire accommodating groove 125 extends from the side away from the other baffle 123 to the peripheral side 1233 of the baffle 123 where it is located. In this design, the groove bottom surface 1251 of the primary wire accommodating groove 125 is designed as a slope that runs through the inner surface 1231 and the peripheral surface 1233 of the baffle 123 and is inclined relative to the axis 1221 of the winding post 122, so that the first transformer winding 14 When the outlet section of the first primary winding 141 passes through the primary wire accommodating slot 125, it can partly bear against the slot bottom surface 1251 of the primary wire accommodating slot 125. On the one hand, it can strengthen the first primary winding of the first transformer winding 14. 141 after winding the winding column 122, on the other hand, it can effectively prevent the outlet section of the first primary winding 141 of the first transformer winding 14 from being directly bent by 90 and being drawn to the end and the circuit board of the switching power supply or There is a possibility of fracture due to the connection of the pin body of the transformer assembly.

As shown in Figure 8, considering the direction along the axis 1221 of the winding post 122, the distance between the two inner surfaces 1231 of the two baffles 123 close to each other is the width M of the first skeleton 12, the first transformer winding After the first secondary winding 142 of 14 is wound through the winding column 122, the outlet section of the first secondary winding 142 of the first transformer winding 14 (that is, the first secondary winding 142 of the first transformer winding 14 is not wound The redundant part on the winding post 122) stretches out along the radial direction of the winding post 122 and is drawn to the end to connect with the circuit board of the switching power supply. When the transformer assembly is a step-down transformer, since the first transformer winding The wire diameter of the first secondary winding 142 of the first transformer winding 14 is relatively large, and the first secondary winding 142 of the first transformer winding 14 will occupy the The width M of the first bobbin 12 is reduced to reduce the space, which is not conducive to the winding of other primary windings or other secondary windings of the first bobbin 12 . As shown in Figure 9, in order to improve the orderly arrangement of the first primary winding 141 and the first secondary winding 142 of the first transformer winding 14 on the winding post 122, it is further designed that the peripheral side of at least one baffle plate 123 1233 is recessed toward the axis 1221 of the winding column 122 to form a secondary wire accommodating groove 126. The secondary wire accommodating groove 126 runs through the baffle plate 123 along the axis 1221 of the winding column 122 and communicates with the accommodating space 124. The secondary wire The accommodating slot 126 is configured to accommodate a portion of the first secondary winding 142 of the first transformer winding 14 . In this design, after the first secondary winding 142 of the first transformer winding 14 is wound by the winding post 122, the outgoing section of the first secondary winding 142 of the first transformer winding 14 will not extend along the radial direction of the winding post 122. , but the outlet section of the first secondary winding 142 of the first transformer winding 14 is directly drawn through the secondary line accommodating groove 126 to be connected to the circuit board of the switching power supply at the end, so the first transformer winding 14 The outlet section of the secondary winding 142 will not occupy space along the axis 1221 of the winding post 122, and will not affect the width M of the first bobbin 12, thereby not affecting other primary windings or sub-levels of the first bobbin 12. The winding of the winding. It should be noted that one baffle plate 123 may be provided with a secondary line accommodating groove 126, or both baffle plates 123 may be provided with a secondary line accommodating groove 126, and when both baffle plates 123 are provided with When the secondary wire accommodating groove 126, after the first secondary winding 142 of the first transformer winding 14 is wound through the winding post 122, the outlet section of the first secondary winding 142 of the first transformer winding 14 can only pass through the The secondary line accommodating groove 126 on one side of the circuit board is used to realize single-side outlet.

As shown in FIG. 10 , further, along the first predetermined direction AA (that is, the width direction), the width dimension of the secondary line accommodating groove 126 is D, and D satisfies the conditional formula: 4.5mm≤D≤7.0mm, The first preset direction AA is perpendicular to the direction of the axis 1221 of the winding post 122 . For example, the value of the width dimension D may be, but not limited to, 4.5 mm, 5.5 mm or 6.5 mm. In this design, by reasonably designing the width dimension D so that 4.5mm≤D≤7.0mm, the secondary wire accommodating groove 126 can accommodate the output of the first secondary winding 142 of the first transformer winding 14 with a sufficiently large wire diameter. line segment to meet the application requirements of high-current scenarios; when D<4.5mm, the width dimension D of the secondary line accommodating groove 126 is small, and cannot accommodate the first secondary of the first transformer winding 14 with a large line diameter The outlet section of the winding 142, thereby affecting the winding of other primary windings or other secondary windings of the first skeleton 12; when D>7.0 mm, the width dimension D of the secondary wire accommodating groove 126 is relatively large, although it can accommodate The outlet section of the first secondary winding 142 of the first transformer winding 14 with a larger wire diameter will cause the size of the baffle 123 along the first preset direction AA to be larger, thereby affecting the miniaturization design of the first skeleton 12 .

Specifically, in some embodiments, each of the two baffles 123 is provided with a secondary wire accommodating groove 126, and the two secondary wire accommodating grooves 126 are arranged opposite to each other along the axis 1221 of the winding post 122, wherein The width dimension D of one secondary wire accommodating groove 126 is 6.2 mm, and the width dimension D of the other secondary wire accommodating groove 126 is 5.3 mm.

As shown in Figures 6-7, considering that the baffle plate 123 is not only used to connect with the winding post 122 to form the above-mentioned accommodating space 124, the baffle plate 123 is also used to carry the magnetic core 11 of the transformer assembly, in order to realize the first The miniaturization design of the skeleton 12, so it is further designed that the baffle plate 123 has an outer surface 1232 facing away from the winding post 122, and at least one outer surface 1232 of the baffle plate 123 has a magnetic core accommodating groove 127 (that is, a magnetic core accommodating groove 127 extending inwardly from the outer surface 1232 of the baffle 123 ), the magnetic core accommodating groove 127 is configured to accommodate the main body 111 of the magnetic core 11 . In this design, by designing the magnetic core accommodating groove 127 on the outer surface 1232 of at least one baffle plate 123, the main body 111 of the magnetic core 11 can be accommodated in the magnetic core accommodating groove 127, and by reducing the magnetism of the transformer assembly The space occupancy ratio of the core 11 located outside the first frame 12 realizes the miniaturization design of the transformer assembly. It should be noted that the part of the magnetic core 11 of the transformer assembly located in the magnetic core accommodating groove 127 abuts against the groove wall of the magnetic core accommodating groove 127, which can also limit the generation of the magnetic core 11 of the transformer assembly relative to the baffle plate 123 in a direction perpendicular to the baffle plate 123. The movement in the plane of the extending direction of the magnetic core receiving groove 127 is used to improve the stability between the magnetic core 11 and the first frame 12 of the transformer assembly.

As shown in FIG. 11 , further, along the axis 1221 of the winding post 122 (that is, along the third predetermined direction CC), the distance between the outer surfaces 1232 of the two baffles 123 is H, and H satisfies Conditional formula: 8.0 mm ≤ H ≤ 10.0 mm. For example, the value of H may be, but not limited to, 8.0 mm, 9.0 mm or 10.0 mm. In this design, by designing the overall size of the first skeleton 12 along the axis 1221 of the winding post 122 to meet the above conditional formula, the miniaturization design of the transformer assembly can be further optimized, thereby realizing the miniaturization design of the switching power supply.

As shown in Figures 6-7, considering that the winding post 122 has a first through hole 121 for the first magnetic post 112 of the magnetic core 11 to pass through, the first through hole 121 of the winding post 122 contains a magnetic The size of the cross-sectional area of the first magnetic column 112 of the core 11 directly determines the size of the magnetic flux of the magnetic core 11 of the transformer assembly, thereby affecting the power of the transformer assembly. The larger the cross-sectional area of the first magnetic column 112 of 11 is, the larger the magnetic flux of the magnetic core 11 of the transformer assembly is, and the greater the power of the transformer assembly is. In the case of ensuring the maximum power of the transformer assembly, in order to reduce the size of the transformer assembly as a whole along the axis 1221 of the winding post 122, it is further designed that in a section perpendicular to the axis 1221 of the winding post 122, the winding The wire post 122 is waist-shaped. In this design, by designing the cross section of the winding post 122 in the direction perpendicular to its axis 1221 into a waist shape, the first through hole 121 of the winding post 122 is also in a waist shape, not only making the first through hole 121 of the winding post 122 The cross-sectional area of the first magnetic post 112 of the magnetic core 11 installed in the through hole 121 is maximized, and the length of the outer periphery of the winding post 122 can also be increased to effectively reduce the overall transformer assembly along the axis 1221 of the winding post 122. The size in the direction, so as to realize the miniaturization design of the switching power supply.

Considering that after the first primary winding 141 of the first transformer winding 14 is wound through the winding column 122, the outlet section of the first primary winding 141 of the first transformer winding 14 is pulled to the end and the transformer through the primary wire receiving slot 125. The needle body of the assembly is connected, and the needle body of the transformer assembly can be inserted on the outer surface 1232 of the baffle plate 123 . In order to reduce the size of the transformer assembly as a whole along the axis 1221 of the winding post 122, it is further designed that the peripheral side 1233 of the baffle plate 123 has an insertion hole 128, and the insertion hole 128 is arranged adjacent to the primary wire accommodating groove 125, and the insertion hole 128 is inserted into the needle body of the transformer assembly, and the outlet section of the first primary winding 141 of the first transformer winding 14 can be wound on the needle body of the transformer assembly after passing through the primary wire accommodating groove 125 . The specific shape of the hole section of the jack 128 is not limited here, the needle body of the transformer assembly can be interference fit with the hole wall of the jack 128, or can be fixed on the hole wall of the jack 128 by glue bonding.

Based on the above switching power supply, the present application also provides a socket, the socket includes a seat body and the switching power supply as described in any of the above embodiments. source, the switching power supply is set on the base.

Wherein, the socket can be a civilian socket, an industrial socket, a waterproof socket, a power socket, a computer socket, a telephone socket, a video and audio socket, a mobile socket, and a USB socket, etc. The application does not specifically limit the type and size of the socket.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the protection of the application. within range.

Claims

A switching power supply, including a circuit board and a transformer assembly mounted on the circuit board, the transformer assembly including:

The magnetic core includes a main body, a first magnetic column and a second magnetic column, the first magnetic column and the second magnetic column are connected to the main body, and the first magnetic column and the second magnetic column are Arranged at intervals in the first preset direction;

a first frame sleeved on the first magnetic column;

the second frame is sleeved on the second magnetic column;

a first transformer winding, wound on the first bobbin, configured to pass in a first current and output a second current; and

The second transformer winding is wound on the second bobbin and configured to pass in a third current and output a fourth current, and output the second current and the fourth current simultaneously.
The switching power supply according to claim 1, wherein the first transformer winding includes a first primary winding and a first secondary winding, the first primary winding and the first secondary winding are spaced apart, and the first The input end of a primary winding is configured to pass through the first current, and the output end of the first secondary winding is configured to output the second current;

The second transformer winding includes a second primary winding and a second secondary winding, the second primary winding and the second secondary winding are spaced apart, and the input end of the second primary winding is set to be connected to the The third current, the output end of the first secondary winding is set to output the fourth current.
The switching power supply according to claim 2, wherein the switching power supply further comprises:

a first switch unit, the first end of the first switch unit is electrically connected to the output end of the first primary winding;

a second switch unit, the first terminal of the second switch unit is electrically connected to the output terminal of the second primary winding; and

The control unit is electrically connected to the control terminal of the first switch unit and the control terminal of the second switch unit, and is configured to control the first switch unit and the second switch unit to be turned on and off simultaneously.
The switching power supply according to claim 2, wherein the switching power supply further comprises:

a first detection unit, electrically connected to the output terminal of the first primary winding, configured to detect the current output by the first primary winding; and

The second detection unit is electrically connected to the output end of the second primary winding and configured to detect the current output by the second primary winding.
The switching power supply according to claim 4, wherein the first transformer winding further comprises a first auxiliary winding, the first auxiliary winding is spaced apart from the first primary winding and the first secondary winding;

The second transformer winding also includes a second auxiliary winding, the second auxiliary winding is spaced apart from the second primary winding and the second secondary winding;

Wherein, the first end of the first auxiliary winding is electrically connected to the ground terminal, and the second end of the first auxiliary winding is electrically connected to the first detection unit for providing an operating current for the first detection unit ; The first end of the second auxiliary winding is electrically connected to the ground terminal, and the second end of the second auxiliary winding is electrically connected to the second detection unit for providing an operating current to the second detection unit.
The switching power supply according to claim 5, wherein the switching power supply further comprises:

The first diode is connected in series between the first auxiliary winding and the ground terminal, the cathode of the first diode is electrically connected to the first end of the first auxiliary winding, and the first diode The positive pole of the is electrically connected to the ground terminal; and

The second diode is connected in series between the second auxiliary winding and the ground terminal, the cathode of the second diode is electrically connected to the first end of the second auxiliary winding, and the second diode The positive pole is electrically connected to the ground terminal.
The switching power supply according to claim 1, wherein the direction of the first current is the same as that of the second current, and the winding direction of the first transformer winding is opposite to that of the second transformer winding; or,

The direction of the first current is opposite to that of the second current, and the winding direction of the first transformer winding is the same as that of the second transformer winding.
The switching power supply according to claim 1, wherein the maximum length of the first magnetic column along the first preset direction is a1, and the maximum length of the first magnetic column along the second preset direction is b1, The a1 is smaller than the b1, the second preset direction is the same as the first preset direction The setting direction is set vertically, and the second preset direction is set parallel to the end surface of the first magnetic column and the end surface of the second magnetic column.
The switching power supply according to claim 8, wherein the maximum length of the second magnetic column along the first preset direction is a2, and the maximum length of the second magnetic column along the second preset direction is b2, said a2 is equal to said b2.
The switching power supply according to claim 1, wherein the first transformer winding comprises a first primary winding, and the first bobbin comprises:

a winding post, at least arranged to wind around said first primary winding, has an axis; and

Two baffles are connected to both ends of the winding post along the axial direction of the winding post, and surround the winding post to form an accommodating space for accommodating the first primary winding, At least one primary wire accommodating groove is provided on the inner surface of any one of the baffles connected to the winding post, and the primary wire accommodating groove is configured to accommodate part of the outgoing wire section of the first primary winding.
The switching power supply according to claim 10, wherein the primary wire accommodating groove penetrates from the inner surface to the peripheral surface of the baffle, and the bottom surface of the primary wire accommodating groove is relative to the axis The inclined slope is from the inner side to the peripheral side, and the vertical distance between the bottom surface of the groove and the axis gradually increases.
The switching power supply according to claim 10, wherein the first transformer winding further comprises a first secondary winding, at least one of the baffles is recessed toward the axis to form a secondary wire accommodating groove, the The secondary wire accommodating groove passes through the baffle plate along the axis direction and communicates with the accommodating space, and the secondary wire accommodating groove is configured to accommodate a part of the outgoing wire section of the first secondary winding.
The switching power supply according to claim 12, wherein, along the first predetermined direction, the width dimension of the secondary line accommodating groove is D, and D satisfies the conditional formula: 4.5mm≤D≤7.0mm, so The first preset direction is perpendicular to the axis direction.
The switching power supply according to claim 10, wherein the baffle has an outer surface facing away from the winding post, at least one of the baffles has a magnetic core receiving groove on the outer surface, and the magnetic core The accommodating groove is configured to accommodate part of the main body.
The switching power supply according to claim 14, wherein, along the axial direction, the distance between the two outer surfaces is H, and H satisfies the conditional formula: 8.0mm≤H≤10.0mm.
The switching power supply according to claim 10, wherein, in a section perpendicular to the direction of the axis, the shape of the winding post is waist-shaped.
The switching power supply according to claim 10, wherein there is a socket on the peripheral side of the baffle plate, the socket is arranged adjacent to the primary line accommodating groove, and the socket is used for the pin body of the transformer assembly Inserted, the outgoing wire section of the first primary winding can be wound on the needle body after passing through the primary wire accommodating groove.
A socket, comprising:

body;

A switching power supply, the switching power supply is arranged on the base, the switching power supply includes a circuit board and a transformer assembly mounted on the circuit board, the transformer assembly includes:

The magnetic core includes a main body, a first magnetic column and a second magnetic column, the first magnetic column and the second magnetic column are connected to the main body, and the first magnetic column and the second magnetic column are Arranged at intervals in the first preset direction;

a first frame sleeved on the first magnetic column;

the second frame is sleeved on the second magnetic column;

a first transformer winding, wound on the first bobbin, configured to pass in a first current and output a second current; and

The second transformer winding is wound on the second bobbin and configured to pass in a third current and output a fourth current, and output the second current and the fourth current simultaneously.