A transformer with reduced thermal damage

Abstract

The present invention discloses a transformer with reduced thermal damage, which relates to the technical field of transformers. The protective shell comprises a winding frame and a magnetic core, the winding frame has a magnetic core penetration hole arranged along a first direction, the outer side of the winding frame is provided with a winding groove, the winding groove is used for winding a primary winding and a secondary winding, and the magnetic core is penetrated on the magnetic core penetration hole along the first direction, and is characterized in that a magnetically actuated heat dissipation component is also provided on the protective shell; the magnetically actuated heat dissipation component is configured to be magnetically actuated to a heat dissipation state by the magnetic field obtained by the magnetic core when the primary winding and the secondary winding are energized; and reset to a protection state when the power is cut off and the magnetic attraction fails; the heat dissipation state and the protection state formed by the magnetically actuated heat dissipation component when the power is on and the power is cut off respectively, so that the transformer can be assisted in heat dissipation when the power is on to reduce thermal damage; and the transformer can be protected when the power is off, and the practicability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer capable of reducing thermal damage. Background Art

[0002] Transformers are widely used in scenarios such as electrical quantity conversion, energy transfer, and system isolation in power electronics, wireless communications, medical equipment, and consumer electronics.

[0003] The structure of the transformer is often like the Chinese invention application "A transformer skeleton and transformer" with publication number CN214588396U, which includes a pin base, a winding skeleton and a magnetic core; the magnetic core includes a first magnetic core and a second magnetic core that adapt to each other, the first magnetic core is located on the top of the second magnetic core, a first magnetic column is formed on the middle part of the first magnetic core close to the side of the second magnetic core, a second magnetic column is formed on the middle part of the second magnetic core close to the side of the first magnetic core, and the first magnetic column and the second magnetic column are coaxial; a connecting piece is provided on the magnetic core, and the first magnetic core and the second magnetic core are relatively fixed by the connecting piece; the winding skeleton is sleeved outside the first magnetic column and the second magnetic column.

[0004] When powered on, the transformer will generate heat, especially when the load is too large, the heat generation will be more serious. Excessive temperature may cause the transformer insulation material to age faster and even cause a fire. However, the current heat dissipation method of the transformer is relatively simple and needs to be improved. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A transformer for reducing thermal damage, comprising a protective shell, a winding bobbin and a magnetic core provided on the protective shell, the winding bobbin having a magnetic core penetration hole arranged along a first direction, a winding groove surrounding the magnetic core penetration hole along the circumference of the magnetic core penetration hole provided on the outer side of the winding bobbin, the winding groove being used for winding a primary winding and a secondary winding, the magnetic core being penetrated through the magnetic core penetration hole along the first direction, and a magnetically actuated heat dissipation component provided on the protective shell; the magnetically actuated heat dissipation component is configured such that when the primary winding and the secondary winding are energized, the magnetic field obtained by the magnetic core is magnetically actuated to a heat dissipation state; and when the power is cut off and the magnetic attraction fails, the component is reset to a protection state.

[0007] As a further solution of the present invention: the part with the winding groove in the winding skeleton is located in the protective shell, and the outer side of the protective shell is penetrated by a heat dissipation connecting groove corresponding to the internal winding skeleton; the magnetically actuated heat dissipation component includes a protective cover movably arranged on the protective shell, the protective cover moves on the protective shell and forms a first movable position for blocking the heat dissipation connecting groove or intensifying the blocking of the heat dissipation connecting groove, and a second movable position for disengaging from the blocking of the heat dissipation connecting groove or reducing the blocking of the heat dissipation connecting groove; the protective cover is provided with a magnetically attracted part and an elastic reset part; when the primary winding and the secondary winding are energized, the magnetically attracted part on the protective cover is magnetically attracted by the magnetic field obtained by the magnetic core, causing the protective cover to move from the first movable position to the second movable position, and the elastic reset part is in an elastic deformation state or in an intensified elastic deformation state; when the primary winding and the secondary winding are de-energized and the magnetic attraction fails, the elastic reset part performs elastic deformation recovery, so that the protective cover moves from the second movable position to the first movable position.

[0008] As a further solution of the present invention: the heat dissipation connecting groove is provided on the outer side of the protective shell parallel to the first direction, and the protective cover moves along the first direction.

[0009] As a further solution of the present invention: the protective shell has a connecting groove that penetrates two opposite outer sides of the protective shell along the first direction, and the connecting groove forms a first connecting opening and a second connecting opening on the two opposite outer sides after penetrating the two opposite outer sides along the first direction; the winding skeleton includes a winding post arranged along the first direction, a wiring end connected to one end of the winding post, and a functional end located at the other end of the winding post; the functional end and the winding post are detachable, and a winding lead-out port and a connecting pin are provided on the wiring end, and the winding groove is provided on the outer side of the winding post; the other end of the winding post is inserted into the protective shell from the first connecting opening or the second connecting opening, and the functional end is correspondingly engaged with one end of the winding post at the second connecting opening or the first connecting opening. When engaging, the functional end and the wiring end form opposite clamping of the protective shell in the first direction.

[0010] As a further solution of the present invention: a slide rail arranged along the first direction is provided on the functional end, and a slider cooperating with the slide rail is connected to the protective cover; the protective cover moves on the outer side of the protective shell where the heat dissipation connecting groove is located.

[0011] As a further solution of the present invention: the heat dissipation connecting groove passes through two opposite outer sides of the protective shell along a second direction perpendicular to the first direction, and forms a first heat dissipation opening and a second heat dissipation opening on the two opposite outer sides respectively; after the winding post passes through the protective shell, a gas flow channel connected to the first heat dissipation opening and the second heat dissipation opening is provided between the inner wall of the protective shell and the winding wound on the winding post.

[0012] As a further solution of the present invention, the protective cover has a first portion corresponding to the first heat dissipation opening, and a second portion corresponding to the second heat dissipation opening.

[0013] As a further solution of the present invention: the magnetic pole direction of the magnetic field obtained by the magnetic core is parallel to the first direction.

[0014] As a further solution of the present invention: the magnetically attracted part is connected to the slider, and the magnetically attracted part corresponds to the magnetic poles formed after the magnetic core obtains the magnetic field; the elastic reset part is located between the slider and the inner wall of the slide rail; when the slider slides along the first direction and not in the direction close to the wiring end, the elastic reset part is elastically deformed by the joint action of the slider and the inner wall of the slide rail.

[0015] As a further solution of the present invention: the winding skeleton also includes a connecting belt, which tightly wraps the functional end and the wiring end on the protective shell; wherein, the slider is placed in the slide rail from the opening at one end of the slide rail away from the wiring end, and when the connecting belt is tightly wrapped, the connecting belt forms a limiting structure for preventing the slider from falling out.

[0016] Compared with the existing technology, the beneficial effects of this technical solution are: the heat dissipation state and protection state formed by the magnetically actuated heat dissipation component when power is on and when power is off respectively, so that the transformer can be assisted in heat dissipation when power is on to reduce thermal damage; the transformer can be protected when power is off, and it has good practicality.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural stereogram of the present invention, with the protective cover in the first active position;

[0020] Figure 2 It is another structural perspective view of the present invention, with the protective cover in the second active position;

[0021] Figure 3 It is another structural stereogram of the present invention, and Figure 1 In comparison, it hides the magnetically actuated heat dissipation component;

[0022] Figure 4It is a structural sectional view of the present invention.

[0023] The corresponding reference numerals in the accompanying drawings are described as follows:

[0024] Protective case-1,

[0025] Winding frame-2, connection end-201, functional end-202, winding post-203, winding outlet-204, connecting pin-205, connecting belt-206,

[0026] Magnetic core-3, columnar portion-301,

[0027] Magnetic core hole-4,

[0028] Winding slot-5,

[0029] Magnetic actuated heat dissipation component-6, protective cover-601, magnetically attracted component-602, elastic reset component-603,

[0030] Heat dissipation connecting groove-7, first heat dissipation opening-701, second heat dissipation opening-702,

[0031] The first through-opening-8a, the second through-opening-8b,

[0032] Slide rail-9,

[0033] Slider - 10,

[0034] Gas flow channel-11. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figure 1-4 A transformer for reducing thermal damage includes a protective shell 1, on which a winding skeleton 2 and a magnetic core 3 are provided. The winding skeleton 2 has a magnetic core penetration hole 4 arranged along a first direction, and the outer side of the winding skeleton 2 is provided with a winding groove 5 surrounding the magnetic core penetration hole 4 along the circumference of the magnetic core penetration hole 4. The winding groove 5 is used for winding a primary winding and a secondary winding. The magnetic core 3 is penetrated on the magnetic core penetration hole 4 along the first direction. A magnetically actuated heat dissipation component 6 is also provided on the protective shell 1.

[0037] The magnetically actuated heat dissipation component 6 is configured such that when the primary winding and the secondary winding are energized, the magnetic field obtained by the magnetic core 3 is magnetically actuated to a heat dissipation state; when the power is cut off and the magnetic attraction fails, it is reset to a protection state.

[0038] In some embodiments, the portion of the winding bobbin 2 having the winding groove is located inside the protective shell 1 , and a heat dissipation connecting groove 7 corresponding to the inner winding bobbin 2 is passed through the outer side of the protective shell 1 .

[0039] The magnetically actuated heat dissipation assembly 6 includes a protective cover 601 movably arranged on the protective shell 1. The protective cover 601 moves on the protective shell 1 and forms a first movable position for blocking the heat dissipation connecting groove 7 or intensifying the blocking of the heat dissipation connecting groove 7, and a second movable position for disengaging from the blocking of the heat dissipation connecting groove 7 or reducing the blocking of the heat dissipation connecting groove 7.

[0040] The protective cover 601 is provided with a magnetically attracted member 602 and an elastic reset member 603. When the primary winding and the secondary winding are energized, the magnetically attracted member 602 on the protective cover 601 is magnetically attracted by the magnetic field obtained by the magnetic core, causing the protective cover 601 to move from the first active position to the second active position, so that the heat in the protective shell 1 can be discharged more quickly, reducing the heat accumulation in the winding and the magnetic core. At this time, the elastic reset member 603 is in an elastic deformation state or an aggravated elastic deformation state; when the power is cut off and the magnetic attraction fails, the elastic reset member 603 performs elastic deformation recovery accordingly, causing the protective cover 601 to move from the second active position to the first active position, forming a reset effect. At this time, the protective cover 601 forms a blockage for the heat dissipation connection groove 7, so that the winding in the protective shell 1 is further protected.

[0041] In some embodiments, the protective shell 1 has a through-connecting groove that penetrates two opposite outer sides of the protective shell 1 along a first direction. After the through-connecting groove penetrates the two opposite outer sides along the first direction, a first through-connecting opening 8a and a second through-connecting opening 8b are formed on the two opposite outer sides respectively.

[0042] like Figure 3 As shown, the connecting groove is provided to pass through the upper and lower sides of the protective shell 1 .

[0043] In some embodiments, the winding bobbin 2 includes a winding post 203 arranged along a first direction, a connection end 201 connected to one end of the winding post 203, and a functional end 202 located at the other end of the winding post 203. The functional end 202 is detachable from the winding post 203, the connection end 201 is provided with a winding outlet 204 and a connecting pin 205, and the winding groove 5 is provided on the outer side of the winding post 203.

[0044] After the other end of the winding post 203 passes through the protective shell 1 from the first penetration opening 8a (or the second penetration opening), the functional end 202 can be engaged with one end of the winding post 203 at the second penetration opening 8b (or the first penetration opening).

[0045] When engaged, the functional end portion 202 and the connection end portion 201 can clamp the protective shell 1 in a first direction.

[0046] In some embodiments, the winding bobbin 2 further includes a connecting tape 206 , which tightly wraps the functional end 202 and the wiring end 201 on the protective shell 1 .

[0047] like Figure 1 、 3 As shown, for example, the first through-opening 8 a is located on the bottom side of the protective shell 1 , and the second through-opening 8 b is located on the top side of the protective shell 1 .

[0048] The winding post 203 passes through the first opening 8a into the protective shell 1, and the connection end 201 forms a counteracting effect with the bottom side of the protective shell 1; the functional end 202 approaches the upper end of the winding post 203 from top to bottom, and forms a counteracting effect on the top side of the protective shell 1 from top to bottom.

[0049] The connecting belt 206 wraps the functional end 202 and the wiring end 201 tightly on the protective shell 1 along the wrapping route of the top of the functional end 202 - the right side of the protective shell 1 - the bottom of the wiring end 201 - the left side of the protective shell 1, so that the functional end 202 and the wiring end 201 form a clamping on the protective shell 1 in the up and down directions.

[0050] In some embodiments, the magnetic core 3 has a columnar portion 301, which penetrates the magnetic core penetration hole 4 from bottom to top. When the primary winding and the secondary winding are energized, a magnetic pole direction is formed on the top of the columnar portion 301 along the first direction.

[0051] In some embodiments, the heat dissipation connecting groove 7 is provided on the outer side of the protective shell 1 parallel to the first direction, and the protective cover 601 moves along the first direction.

[0052] In some embodiments, a slide rail 9 is provided on the functional end 202, and a slider 10 that cooperates with the slide rail 9 is connected to the protective cover 601. The protective cover 601 is slid on the slide rail 9 along the first direction through the slider 10, and can slide to the first active position and the second active position accordingly.

[0053] The protective cover 601 moves on the outside of the protective shell 1 where the heat dissipation connecting groove 7 is located, and when the protective cover 601 moves to the first movable position, the protective cover 601 moves along the first direction to block the notch of the heat dissipation connecting groove 7 or to block the notch of the heat dissipation connecting groove 7 more; when the protective cover 601 moves to the second movable position, the protective cover 601 moves along the first direction to disengage from the notch of the heat dissipation connecting groove 7 or to block the notch of the heat dissipation connecting groove 7 less.

[0054] In some embodiments, the heat dissipation connecting groove 7 penetrates two opposite outer sides of the protective shell 1 along a second direction perpendicular to the first direction, and forms a first heat dissipation opening 701 and a second heat dissipation opening 702 on the two opposite outer sides respectively.

[0055] like Figure 1 、 3 As shown, the heat dissipation connecting groove 7 passes through the front and back sides of the protective shell 1.

[0056] In some embodiments, after the winding post 203 is inserted into the protective shell 1, a gas flow channel 11 connected to the first heat dissipation opening 701 and the second heat dissipation opening 702 is provided between the inner wall of the protective shell 1 and the winding (primary winding, secondary winding) wound on the winding post 203, thereby achieving better heat dissipation effect.

[0057] In some embodiments, the protection cover 601 has a first portion corresponding to the first heat dissipation opening 701 , and a second portion corresponding to the second heat dissipation opening 702 .

[0058] In some embodiments, the present transformer is used in a circuit system having an air-cooling module. Through the first heat dissipation opening, the second heat dissipation opening and the gas flow channel, when the primary winding and the secondary winding are energized, the present transformer can be better air-cooled by the air-cooling module in the circuit system through the open gas flow channel; when the primary winding and the secondary winding are de-energized, the gas flow channel can be switched to a closed state, thereby reducing damage to the windings inside the protective shell.

[0059] In some embodiments, the magnetic pole direction of the magnetic field obtained by the magnetic core 3 is parallel to the first direction.

[0060] In some embodiments, the slide rail 9 is formed on a side of the functional end 202 away from the connection end 201 along the first direction, and the slider 10 is slidably disposed on the slide rail along the first direction.

[0061] The slider 10 can be placed in the slide rail 9 from the opening at one end of the slide rail 9 away from the wiring end 201. When the connecting belt 206 is tightened, the connecting belt 206 forms a corresponding limiting structure for preventing the slider 10 from falling out. The structure is simple and ingenious, easy to install and stable.

[0062] In some embodiments, the magnetically attracted member 602 is connected to the slider 10 , and the magnetically attracted member 602 corresponds to the magnetic poles formed after the magnetic core 3 obtains the magnetic field.

[0063] In some embodiments, the elastic return member 603 is an elastic component such as a spring (such as a compression spring) or a spring.

[0064] The elastic reset member 603 is located between the slider 10 and the inner wall of the slide rail 9. When the slider 10 slides along the first direction and in the direction close to the wiring end 201, the elastic reset member 603 is pressed by the slider 10 and the inner wall of the slide rail 9 to elastic deformation.

[0065] In some embodiments, the magnetically attracted object is, for example, an iron block.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A transformer for reducing heat damage, comprising a protective shell, a winding bobbin and a magnetic core disposed on the protective shell, the winding bobbin having a magnetic core through-hole disposed along a first direction, a winding slot disposed on the outer side of the winding bobbin surrounding the magnetic core through-hole along a circumferential direction of the magnetic core through-hole, the winding slot being used for winding a primary winding and a secondary winding, the magnetic core being disposed on the magnetic core through-hole along the first direction, characterized in that: The protective shell is also provided with a magnetically actuated heat dissipation component; The portion of the winding frame with the winding groove is located inside the protective shell, and the outer side of the protective shell is penetrated by a heat dissipation connecting groove corresponding to the internal winding frame; The magnetically actuated heat dissipation assembly includes a protective cover movably disposed on the protective shell, the protective cover being movable on the protective shell and forming a first movable position for blocking the heat dissipation communication groove or increasing the blockage of the heat dissipation communication groove, and a second movable position for disengaging from blocking the heat dissipation communication groove or reducing the blockage of the heat dissipation communication groove; The protective cover is provided with a magnetically attracted component and an elastic reset component; When the primary winding and the secondary winding are energized, the magnetically attracted member on the protective cover is magnetically attracted by the magnetic field obtained by the magnetic core, causing the protective cover to move from the first movable position to the second movable position, and the elastic return member is in an elastically deformed state or in an aggravated elastically deformed state; When the primary winding and the secondary winding are powered off and the magnetic attraction fails, the elastic reset member recovers elastically, so that the protective cover moves from the second movable position to the first movable position; The heat dissipation connection groove is provided on the outer side of the protective shell parallel to the first direction, and the protective cover is movable along the first direction; The protective shell has a through-hole connecting groove penetrating two opposite outer sides of the protective shell along a first direction, and the through-hole connecting groove forms a first through-hole opening and a second through-hole opening on the two opposite outer sides after penetrating the two opposite outer sides along the first direction. The winding bobbin includes a winding post arranged along a first direction, a connection end connected to one end of the winding post, and a functional end located at the other end of the winding post; the functional end and the winding post are detachably arranged, the connection end is provided with a winding outlet and a connecting pin, and the winding groove is provided on the outer side of the winding post; The other end of the winding post is inserted into the protective shell from the first penetration opening or the second penetration opening, and the functional end is correspondingly engaged with one end of the winding post at the second penetration opening or the first penetration opening. When engaged, the functional end and the wiring end form opposite clamping on the protective shell in the first direction.

2. The transformer for reducing thermal damage according to claim 1, characterized in that: The functional end portion is provided with a slide rail arranged along a first direction, and the protective cover is connected with a slider matched with the slide rail; The protection cover moves on the outer side of the protection shell where the heat dissipation connecting groove is located.

3. The transformer with reduced thermal damage according to claim 2, characterized in that: The heat dissipation connecting groove penetrates two opposite outer sides of the protective shell along a second direction perpendicular to the first direction, and forms a first heat dissipation opening and a second heat dissipation opening on the two opposite outer sides respectively; After the winding post is inserted into the protective shell, a gas flow channel communicating with the first heat dissipation opening and the second heat dissipation opening is provided between the inner wall of the protective shell and the winding wound on the winding post.

4. The transformer with reduced thermal damage according to claim 3, characterized in that: The protection cover has a first portion corresponding to the first heat dissipation opening, and a second portion corresponding to the second heat dissipation opening.

5. The transformer with reduced thermal damage according to any one of claims 2 to 4, characterized in that: The magnetic pole direction of the magnetic field obtained by the magnetic core is parallel to the first direction.

6. The transformer with reduced thermal damage according to claim 5, characterized in that: The magnetically attracted part is connected to the slider, and the magnetic poles formed by the magnetic core after the magnetic part receives the magnetic field correspond to each other; The elastic reset member is located between the slider and the inner wall of the slide rail; when the slider slides along the first direction and in the direction close to the wiring end, the elastic reset member is elastically deformed by the slider and the inner wall of the slide rail.

7. The transformer with reduced thermal damage according to claim 2, 3, 4 or 6, characterized in that: The winding frame also includes a connecting belt, which wraps the functional end and the wiring end tightly on the protective shell; The slider is inserted into the slide rail from an opening at one end of the slide rail away from the wiring end. When the connecting belt is tightened, the connecting belt forms a corresponding limiting structure for preventing the slider from falling out.

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