Power supply module with high isolation voltage

Abstract

The utility model belongs to the technical field of switching power supplies, and particularly discloses a high-isolation power supply power supply module, which comprises a metal base, an insulating shell and a magnetic device, the metal base and the insulating shell arranged at the upper part of the metal base jointly form a closed shell, a double-sided PCB (Printed Circuit Board) is arranged above the metal base in the shell, and a gap is formed between the double-sided PCB and the metal base; the double-sided PCB upwards extends to the shell from a hole in the shell through guide pins at two ends, and one end of the PCB downwards penetrates through the metal base through a screw; a through hole is formed in the double-sided PCB, and a magnetic device is arranged in the through hole; a layer of ceramic chip is arranged between the double-sided PCB and the metal base, and the bottom of the magnetic device is attached to the upper surface of the ceramic chip. According to the high-isolation power supply power supply module, a traditional technology is improved, a high-voltage insulation scheme which is resistant to high voltage, moisture-proof, good in insulation effect and high in stability is provided, and the stability and the reliability of the power supply module in practical application are improved to a certain extent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of switching power supply, concretely relates to a power supply module of high isolation voltage. BACKGROUND

[0002] At present, switching power supply module as a kind of commonly used electric energy conversion equipment, it has been widely applied in various fields, especially in aerospace, weapon ship and other industries, the safety and reliability of power module and other performances have been put forward higher requirements.Although the existing switching power supply module has the advantages of small size, high efficiency, light weight, but there are still great deficiencies in some special environment applications. Figure 1 As shown in the figure, the traditional power supply module includes base 104 and the shell 101 installed on it, the base 104 and the shell 101 installed on the upper part of it constitute a closed shell, the base 104 inside the shell is installed with PCB board 102, the PCB board 102 is fixed on the shell 101 by the lead pin at both ends, and the PCB board 102 is fixed on the base 104 by screw 105. The PCB board 102 is provided with a through hole, and a magnetic device is arranged in the through hole, and the bottom surface of the magnetic device is attached to the upper surface of the base 104. In practical application, the traditional power supply module often faces the challenges of insufficient high-voltage resistance, poor insulation performance and insufficient moisture-proof effect, which greatly weakens the performance effect of the power module itself.

[0003] Therefore, it is urgent to provide a power supply module with high-voltage resistance, good insulation performance and good moisture-proof effect. INVENTION CONTENTS

[0004] The utility model aims at providing a power supply module of high isolation voltage to solve the problems of insufficient high-voltage resistance, poor insulation performance and moisture-proof effect of traditional power supply module in practical application.

[0005] A power supply module of high isolation voltage, comprising a metal base, an insulating shell and a magnetic device, the metal base and the insulating shell installed on the upper part thereof constitute a closed shell, the metal base inside the shell is provided with a double-sided PCB board above and there is a spacing between them, the double-sided PCB board is extended to the shell by the hole on the shell through the lead pin at both ends, and one end of the PCB board is fixed on the metal base by screw; the double-sided PCB board is provided with a through hole, and a magnetic device is arranged in the through hole;

[0006] A layer of ceramic sheet is arranged between the double-sided PCB board and the metal base, and the bottom of the magnetic device is attached to the upper surface of the ceramic sheet.

[0007] The magnetic device, the upper surface of the double-sided PCB, the Y capacitor and the optical coupler arranged between the double-sided PCB and the ceramic sheet are fixed by dispensing to form dispensing blocks.

[0008] The magnetic device is provided with a spacer between the periphery of the magnetic device and the side wall of the through hole of the double-sided PCB.

[0009] The part of the screw outside the ceramic sheet and the bottom surface of the double-sided PCB is provided with a protective sleeve, and the part of the screw extending out of the double-sided PCB is provided with an insulating pad.

[0010] The utility model also includes the following other technical features:

[0011] The double-sided PCB is a multilayer double-sided PCB.

[0012] The outer surface of the double-sided PCB and the components and devices thereon is sprayed with a layer of three-proof paint.

[0013] Six flange holes are formed in the metal base.

[0014] The metal base is an aluminum alloy base.

[0015] The insulating shell is a plastic shell.

[0016] The insulating pad is a glass fiber sheet.

[0017] The thickness of the ceramic sheet is 1mm.

[0018] Compared with the traditional power supply module, the utility model has the following beneficial effects:

[0019] The use of a plastic shell to protect the module, the addition of a ceramic sheet between the base and the PCB, the addition of a sleeve and a glass fiber insulating plate to the mechanical connection screw, the dispensing treatment of the magnetic device, the Y capacitor and the optical coupler, and the spraying of a layer of three-proof paint to protect the module. The above design not only greatly improves the heat dissipation performance, moisture-proof effect and insulation performance of the power supply module under high voltage conditions, but also ensures the safety and reliability of the power supply module, thereby improving the long-term stability of the module and prolonging its service life to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of a traditional power supply module.

[0021] Figure 2 It is a structural schematic view of a high-isolation-voltage power supply module of the utility model.

[0022] Figure 3 It is a structural schematic view of the base. DETAILED DESCRIPTION

[0023] The utility model provides a high isolation voltage's power supply module, aims at improving its high pressure capacity and insulation performance, below combining the drawing makes further detailed explanation.

[0024] As Figure 2 The utility model discloses a high isolation voltage's power supply module, including metal base 208, insulating shell 201, double -sided PCB board 202 and magnetic device 203.

[0025] Metal base 208 and install insulating shell 201 on its upper part jointly constitute a closed casing, and the metal base 208 of casing inside is provided with double -sided PCB board 202 and has spacing between both, and double -sided PCB board 202 is stretched out to the shell 201 (the aperture size of the hole on the shell matches the needle) by the hole on the shell 201 through the needle of both ends upwards, and the PCB board 202 passes screw 209 and is arranged on the metal base 208 downwards, and the double -sided PCB board 202 is provided with magnetic device 203 in the through -hole.

[0026] A layer of ceramic sheet 207 is arranged between double -sided PCB board 202 and metal base 208, and the bottom of magnetic device 203 is attached to the upper surface of ceramic sheet 207, because the ceramic sheet has good heat conduction effect and high voltage resistance, using ceramic sheet 207 to separate the two, can effectively isolate the electrical contact between the internal circuit of power module and metal base 208, can make it can withstand higher voltage impact, and it has excellent heat conduction performance and insulation effect, can rapidly transmit the heat generated inside to the metal base through the ceramic sheet and export.

[0027] Y capacitor and photocoupler arranged on the upper surface of double -sided PCB board 202 and the lower surface of double -sided PCB board 202 are fixed by dispensing, form dispensing block 206, realize the insulation of double -sided PCB board 202, realize the protection processing of the isolation distance between the input and output of the power module of the utility model, and the insulating effect of the used grey glue is good, can effectively isolate air, ensure that its insulation is good.

[0028] Isolation pad 204 is arranged between the periphery of magnetic device 203 and the side wall of the through -hole of double -sided PCB board 202, to isolate magnetic device 203, ensure that magnetic device 203 and the components between primary and secondary leave a certain distance, prevent causing electrical interference.

[0029] The part outside screw 209 between ceramic sheet 207 and the bottom surface of double -sided PCB board 202 is provided with protective sleeve 210, and the part of screw 209 that is stretched out of double -sided PCB board 202 is provided with insulating pad 205 for protection. Avoid the direct contact of screw 209 and double -sided PCB board 202 or other components, reduce the risk of short circuit.

[0030] The double-sided PCB 202 and the outer surface of the components thereon are sprayed with a layer of three-proof paint for protection.

[0031] Preferably, the metal base 208 is provided with six flange holes 301 for fixing the metal base 208 to the equipment by screws.

[0032] Preferably, the metal base 208 is made of an aluminum alloy base, which has high strength and can protect and support the power module and has good heat dissipation performance.

[0033] Preferably, the insulating shell 201 is made of a plastic shell, which has good insulation effect.

[0034] Preferably, the double-sided PCB 202 is a multi-layer double-sided PCB, which has high space utilization and good electromagnetic compatibility.

[0035] Preferably, the insulating gasket 205 is made of a glass fiber sheet, which has good insulation effect, high stability and long service life.

[0036] Preferably, the ceramic sheet 207 has a thickness of 1 mm. Different ceramic sheets have different thermal conductivities. In the embodiment, the ceramic sheet 207 is made of an aluminum oxide ceramic substrate, which can effectively isolate the electrical contact between the internal circuit of the power module and the metal base 208, has excellent heat dissipation performance and insulation effect, can quickly transfer the heat generated by the power module to the metal base 208 through the ceramic sheet 207, and thus can effectively improve the high-voltage resistance of the power module.

[0037] In summary, the power module with high isolation voltage has the advantages of perfect structure, stable performance, good heat dissipation performance, good insulation effect, strong high-voltage isolation capacity and high reliability, and can improve the overall performance and service life of the power module to a certain extent, and has a wide application prospect in the future.

[0038] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can think of changes or replacements within the technical range disclosed by the present application without creative labor, which should be covered within the protection scope of the present application.

Claims

1. A high-isolation-voltage power supply module comprising a metallic base (208), an insulating housing (201) and a magnetic device (203), characterized in that, The metal base (208) and the insulating shell (201) installed on the upper part of the metal base (208) jointly constitute a closed shell, and the metal base (208) inside the shell is provided with a double-sided PCB (202) above the metal base (208) with a spacing between the metal base (208) and the double-sided PCB (202), the double-sided PCB (202) is extended to the outside of the shell (201) through the holes on the shell (201) by the lead pins at both ends, and one end of the PCB (202) is downwardly penetrated into the metal base (208) by the screw (209); The double-sided PCB (202) is provided with a through hole, and the through hole is provided with a magnetic device (203); The double-sided PCB (202) and the metal base (208) are provided with a ceramic sheet (207) therebetween, and the bottom of the magnetic device (203) is attached to the upper surface of the ceramic sheet (207); The magnetic device (203), the upper surface of the double-sided PCB (202), and the Y capacitor and the optical coupler provided between the double-sided PCB (202) and the ceramic sheet (207) are fixed by dispensing, forming a dispensing block (206); The magnetic device (203) is provided with a spacer (204) between the double-sided PCB (202) and the side wall of the through hole of the double-sided PCB (202); The screw (209) is provided with a protective sleeve (210) outside the part between the ceramic sheet (207) and the bottom surface of the double-sided PCB (202), and the part of the screw (209) extending out of the double-sided PCB (202) is provided with an insulating pad (205).

2. The high-isolation voltage power supply module of claim 1, wherein, The double-sided PCB (202) is a multi-layer double-sided PCB.

3. The high-isolation voltage power supply module of claim 1, wherein, The double-sided PCB (202) and the components and devices thereon are sprayed with a layer of three-proof paint.

4. The high-isolation voltage power supply module of claim 1, wherein, The metal base (208) is provided with six flange holes (301).

5. A high-isolation voltage power supply module according to any one of claims 1 to 4, wherein The metal base (208) is an aluminum alloy base.

6. A high-isolation voltage power supply module according to any one of claims 1 to 4, wherein The insulating shell (201) is a plastic shell.

7. A high-isolation voltage power supply module according to any one of claims 1 to 4, wherein The insulating pad (205) is a glass fiber sheet.

8. A high-isolation voltage power supply module according to any one of claims 1 to 4, wherein The thickness of the ceramic sheet (207) is 1mm.

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