A ceramic case resistor

Abstract

The utility model relates to a kind of ceramic shell resistors, including ceramic shell, insulating filler, winding porcelain piece, resistance alloy wire and lead-out solder piece, winding porcelain piece is installed in the inside of ceramic shell, and insulating filler is filled between winding porcelain piece and ceramic shell;Resistance alloy wire is wound on winding porcelain piece, lead-out solder piece is two, respectively installed in winding porcelain piece one end, the both ends of resistance alloy wire are respectively welded with two lead-out solder pieces, and lead-out solder piece one end extends to the outside of ceramic shell.Compared with prior art, the utility model has ceramic shell, can directly contact with the surface to be assembled, does not need to consider the insulation isolation protection between the both, and does not need to consider the insulation isolation protection between resistor shell and core body;Solve the problem of short circuit between resistor shell and core body, such as leakage or breakdown, and the like.

Description

Technical Field

[0001] This utility model relates to resistors, and more particularly to a ceramic-cased resistor. Background Technology

[0002] In electrical drive control equipment, drive control systems are often equipped with control modules such as frequency converters and servo drives. During the process of the drive module stopping operation, due to inertia, the system generates a certain amount of regenerative energy. If this regenerative energy flows back into the electrical circuit, it is highly likely to have adverse effects on the system. Resistors, or energy-dissipating devices, are typically used to absorb and dissipate this regenerative energy. Furthermore, electrical equipment systems commonly contain numerous energy storage devices. When the equipment stops, these energy storage devices may retain residual energy. If this energy acts back into the system circuit, it can threaten the safety of other electronic components in the circuit. Resistors are used to dissipate the residual energy in the energy storage devices, thereby ensuring the safe and stable operation of other electronic components in the system circuit.

[0003] A search revealed that application publication number CN115881374A discloses a high-power aluminum-cased resistor for new energy applications. Specifically, it discloses an aluminum casing with an opening and a rectangular structure. The bottom of the aluminum casing has an insulating ceramic sheet, and the inner wall of the aluminum casing is fitted with a bent mica sheet. An alloy wire is uniformly wound around the outer surface of the resistor core, and the resistor core with the alloy wire wound around it is located at the top of the insulating ceramic sheet. Pins are connected to both ends of the resistor core, and a cover is closed at the opening of the aluminum casing. The pins penetrate the cover. However, this prior art uses an aluminum casing, which requires high insulation protection.

[0004] In summary, designing a resistor with lower insulation protection requirements is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, which has high requirements for insulation protection, and to provide a ceramic-cased resistor.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a ceramic-cased resistor is provided, comprising a ceramic casing, an insulating filler, a wound ceramic component, a resistance alloy wire, and lead-out solder tabs. The wound ceramic component is installed inside the ceramic casing, and an insulating filler is provided between the wound ceramic component and the ceramic casing. The resistance alloy wire is wound on the wound ceramic component, and two lead-out solder tabs are respectively installed at one end of the wound ceramic component. The two ends of the resistance alloy wire are respectively welded to the two lead-out solder tabs, and one end of the lead-out solder tab extends to the outside of the ceramic casing.

[0008] As a preferred technical solution, the winding ceramic component includes a winding post and a support angle, with the resistance alloy wire wound on the winding post; the support angle is located at the end of the winding post near the ceramic shell; the support angle abuts against the inner surface of the ceramic shell, and a gap is formed between the resistance alloy wire and the ceramic shell.

[0009] As a preferred technical solution, the support angle is a columnar structure, including multiple sides, one side of which is attached to the end face of the winding ceramic component, and two sides are attached to two adjacent sides of the ceramic shell.

[0010] As a preferred technical solution, the two sides of the support angle that are in contact with the ceramic shell are perpendicular to each other, and the edges where the two sides intersect are chamfered.

[0011] As a preferred technical solution, the winding ceramic component has blind holes at both ends, and one end of the lead-out solder piece is inserted into the blind hole.

[0012] As a preferred technical solution, one end of the lead-out solder pad is fixed in the blind hole by a heat-resistant adhesive.

[0013] As a preferred technical solution, the lead-out solder pad is parallel to the end face of the winding ceramic component, with one end bent and inserted into the end face of the winding ceramic component, and the other end having two pins.

[0014] As a preferred technical solution, a support block is provided on the side of the ceramic shell where the lead-out welding piece extends.

[0015] As a preferred technical solution, the ceramic shell is a cuboid with an opening on one side, and the lead-out welding piece extends from the opening side of the ceramic shell; the support block is set at the four corners of the opening side of the ceramic shell.

[0016] As a preferred technical solution, the winding ceramic component and the resistance alloy wire are all located inside the ceramic shell.

[0017] Compared with the prior art, the present invention has the following beneficial effects.

[0018] 1) This utility model uses a ceramic shell, which can directly contact the surface to be assembled without considering the insulation isolation between the two, or the insulation isolation between the resistor shell and the core; it solves the problem of short circuit between the resistor shell and the core after leakage or breakdown.

[0019] 2) The winding ceramic component of this utility model is provided with a support angle, which restricts the relative position of the winding post and the ceramic shell, ensures that there is a gap between the resistance alloy wire on the winding post and the ceramic shell, and also ensures that the winding post is stable inside the ceramic shell, preventing the winding post from tilting; the side of the support angle contacts the inner surface of the ceramic shell, and the contact area is large, making the support more stable. The chamfered edge at the intersection of the two sides can reduce the difficulty of installation and positioning.

[0020] 3) After the lead-out solder pad and the winding ceramic part are assembled, they are fixed with heat-resistant adhesive to prevent the lead-out solder pad from falling off or tilting during installation, and to ensure that the relative position of the lead-out solder pad and the ceramic shell remains unchanged.

[0021] 4) The ceramic shell of this utility model is provided with a support block, which reduces the problem of the ceramic shell being deformed and tilting, affecting the resistor assembly; the winding ceramic parts and the resistance alloy wire are all located inside the ceramic shell, and only the size of the ceramic shell needs to be considered during installation. The winding ceramic parts and the resistance alloy wire will not affect the installation of the resistor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a ceramic-cased resistor according to the present invention.

[0023] Figure 2 This is a diagram of the internal structure of the present invention after the ceramic outer shell has been removed.

[0024] Figure 3 This is an exploded view of a ceramic-cased resistor according to the present invention.

[0025] The numbers in the diagram are as follows:

[0026] 1. Ceramic shell, 10. Support block, 2. Insulating filler, 3. Winding ceramic component, 30. Winding post, 300. Blind hole, 31. Support angle, 4. Resistance alloy wire, 5. Lead solder piece, 50. Lead, 6. Temperature resistant adhesive. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0028] like Figure 1 As shown, this embodiment provides a ceramic-cased resistor, including a ceramic casing 1, an insulating filler 2, a wire-wound ceramic component 3, a resistance alloy wire 4, lead-out solder tabs 5, and a heat-resistant adhesive 6. It can be applied to on-board resistors.

[0029] like Figure 3 As shown, the ceramic housing 1 is generally cubic with an internal cavity and an opening on one side. The edges are rounded, and support blocks 10 are located at the four corners of the open side. When the resistor is mounted on the circuit board, the contact area between the support blocks 10 and the circuit board is small, serving as a resistor support point. This ensures the resistor's support strength while minimizing the transfer of heat generated during resistor operation to the circuit board. The ceramic housing 1 has good insulation properties and can directly contact the circuit board surface without requiring additional insulation protection.

[0030] The winding ceramic component 3 includes a winding post 30 and a support angle 31. Resistance alloy wire 4 is wound on the winding post 30. The sides of the winding post 30 are arc-shaped to facilitate the winding of the resistance alloy wire 4. The support angle 31 is a columnar structure with multiple sides. Its axis is perpendicular to the axis of the winding post 30. The figure shows five sides. One side is attached to the end face of the winding post 30 and is defined as the first side. A side adjacent to the first side is perpendicular to the first side and is attached to one inner surface of the ceramic shell, defined as the second side. A side parallel to the first side is attached to another inner surface of the ceramic shell, defined as the fourth side. The planes containing the second and fourth sides are perpendicular, and the intersection of these two perpendicular planes forms a third side through a chamfer. The fourth side is connected to the first side, and the fourth side forms an acute angle with the first side. The cross-section of the winding post 30 is a convex polygon. The support angle 31 restricts the relative position of the winding post 30 and the ceramic housing 1, ensuring a gap between the resistance alloy wire 4 on the winding post 30 and the ceramic housing 1, and also ensuring the stability of the winding post 30 within the ceramic housing 1. The side of the support angle 31 contacts the inner surface of the ceramic housing 1, with a large contact area, making the support more stable. The two surfaces of the ceramic housing and the winding ceramic component 3 are adjacent and perpendicular to each other. The existence of the third side reduces the difficulty of installation and positioning of the ceramic housing and the winding ceramic component 3.

[0031] The lead-out solder piece 5 is parallel to the two end faces of the winding post 30. The two end faces of the winding post 30 are provided with blind holes 300. One end of the lead-out solder piece 5 is bent and inserted into the blind hole 300, and fixed with a heat-resistant adhesive 6. The other end is provided with two leads 50, which extend from the opening side of the ceramic shell 1 to the outside of the ceramic shell 1. The two ends of the resistance alloy wire 4 are connected to the two leads 50 by electric welding or fusion welding to form an electrical circuit, thus forming the resistance core.

[0032] like Figure 2 As shown, the wound ceramic component 3, which is assembled with resistance alloy wire 4 and lead-out solder piece 5, is installed inside the ceramic housing. Except for the pins 50 of the lead-out solder piece 5, the entire component is located inside the ceramic housing. An insulating filler 2 is filled between the ceramic housing and the wound ceramic component 3.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A ceramic-cased resistor, characterized in that, The device includes a ceramic shell (1), an insulating filler (2), a wound ceramic component (3), a resistance alloy wire (4), and lead-out solder pieces (5). The wound ceramic component (3) is installed inside the ceramic shell (1), and the insulating filler (2) is filled between the wound ceramic component (3) and the ceramic shell (1). The resistance alloy wire (4) is wound on the wound ceramic component (3). There are two lead-out solder pieces (5), which are respectively installed at one end of the wound ceramic component (3). The two ends of the resistance alloy wire (4) are respectively welded to the two lead-out solder pieces (5), and one end of the lead-out solder piece (5) extends to the outside of the ceramic shell (1).

2. A ceramic-cased resistor according to claim 1, characterized in that, The winding ceramic component (3) includes a winding post (30) and a support angle (31). The resistance alloy wire (4) is wound on the winding post (30). The support angle (31) is located at one end of the winding post (30) near the ceramic shell (1). The support angle (31) abuts against the inner surface of the ceramic shell (1), and a gap is formed between the resistance alloy wire (4) and the ceramic shell (1).

3. A ceramic-cased resistor according to claim 2, characterized in that, The support angle (31) is a columnar structure, including multiple sides, one side of which is attached to the end face of the winding ceramic piece (3), and two sides are attached to the two adjacent sides of the ceramic shell (1).

4. A ceramic-cased resistor according to claim 3, characterized in that, The two sides of the support angle (31) that are in contact with the ceramic shell (1) are perpendicular to each other, and the edges where the two sides intersect are chamfered.

5. A ceramic-cased resistor according to claim 1, characterized in that, The winding ceramic component (3) has blind holes (300) at both ends, and one end of the lead-out solder piece (5) is inserted into the blind hole (300).

6. A ceramic-cased resistor according to claim 5, characterized in that, One end of the lead-out solder piece (5) is fixed in the blind hole (300) by a heat-resistant adhesive (6).

7. A ceramic-cased resistor according to claim 1, characterized in that, The lead-out solder piece (5) is parallel to the end face of the winding ceramic piece (3), with one end bent and inserted into the end face of the winding ceramic piece (3), and the other end is provided with two pins (50).

8. A ceramic-cased resistor according to claim 1, characterized in that, The ceramic shell (1) has a support block (10) on the side where the lead-out welding piece (5) extends.

9. A ceramic-cased resistor according to claim 8, characterized in that, The ceramic shell (1) is a cuboid with an opening on one side. The lead-out welding piece (5) extends from the opening side of the ceramic shell (1). The support block (10) is set at the four corners of the opening side of the ceramic shell (1).

10. A ceramic-cased resistor according to claim 1, characterized in that, The winding ceramic component (3) and the resistance alloy wire (4) are all located inside the ceramic shell (1).

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