Capacitor convenient to combine

Abstract

The invention aims to provide the capacitor which is convenient to combine, the circuit breaker is safe and reliable, and the capacitor can be quickly disassembled and assembled to realize quick reset. A PCBA terminal board is arranged on the lower shell, a circuit breaker is arranged above the PCBA terminal board, an upper shell is detachably installed on the upper portion of the lower shell, the circuit breaker is detachably installed on the inner wall of the upper shell, the circuit breaker can be taken out from the upper portion of the upper shell, a low-voltage capacitor unit is arranged on the lower portion of the lower shell and comprises a capacitor shell fixedly and detachably installed with the lower shell, and the capacitor shell is connected with the circuit breaker. The capacitor shell is provided with at least two capacitor modules, the capacitor modules are fixed on the drawer type slide rails, and the capacitor modules are provided with quick-plug conductive columns. Dual backup of mechanical bimetallic strip temperature protection and electronic protection is achieved, reliable action is achieved when the temperature reaches the preset temperature, response is rapid, and an overload, over-temperature and over-voltage comprehensive protection mechanism is achieved; rapid plugging and independent replacement of the capacitor module are realized, a drawer type slide rail structure is supported, and maintenance operation is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage capacitor devices, and in particular to a combined convenient capacitor. BACKGROUND

[0002] In modern power systems, capacitors are widely used in power factor compensation, filtering and voltage stabilization, etc. The traditional capacitor is usually an integrated structure, and the internal circuit board, circuit breaker, capacitor element, etc. are all packaged in an indecomposable shell. This structure has the following problems: difficult to maintain: once a part (such as a PCB board, a circuit breaker) is damaged, the whole needs to be disassembled, which is time-consuming and laborious; inconvenient to replace: the circuit breaker or capacitor cannot be replaced individually after aging, causing resource waste; low production efficiency: the assembly process is complex, relying on manual welding and debugging, and automation is difficult to achieve; poor scalability: the capacity cannot be flexibly adjusted or the control logic cannot be upgraded.

[0003] Although some manufacturers have introduced intelligent capacitors with display screens, most of them still use non-modular design and have not truly solved the core pain point of "convenient combination". Therefore, there is an urgent need for a new capacitor structure with clear structure, independently replaceable components, and efficient installation and maintenance. SUMMARY

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present application is to provide a convenient capacitor, which is safe and reliable, can be quickly disassembled and installed, realizes quick reset, responds quickly, and has an overload, overtemperature, and overvoltage comprehensive protection mechanism The solution is a convenient capacitor, which comprises a lower shell, a PCBA main board is installed on one side of the lower shell, a PCBA display board is connected to the PCBA main board, a PCBA terminal plate is installed on the other side of the lower shell, and the PCBA terminal plate is connected to the PCBA main board. Characterized in that a circuit breaker is arranged above the PCBA terminal plate, an upper shell is detachably installed on the upper part of the lower shell, the circuit breaker is detachably installed on the inner wall of the upper shell, the circuit breaker can be taken out from the upper part of the upper shell, a low-voltage capacitor unit is arranged on the lower part of the lower shell, the low-voltage capacitor unit comprises a capacitor shell which is fixedly and detachably installed on the lower shell, the capacitor shell is provided with at least two capacitor modules, the capacitor modules are connected to the PCBA main board, the capacitor modules are installed on the capacitor shell, a drawer type slide rail is installed on the bottom of the capacitor shell, and the capacitor modules are fixed on the drawer type slide rail. The capacitor module is provided with a quick plug conductive column, the PCBA main board is provided with an elastic contact, and the PCBA main board is integrated with a dynamic capacity adjusting chip.

[0005] Preferably, a zero line copper bar is welded on the PCBA main board, and one end of the zero line copper bar extends out of the shell.

[0006] Preferably, the bottom of each capacitor module is fixed with a copper heat pipe, and the capacitor shell is provided with heat dissipation fins on the front and back sides, which are in contact with the copper heat pipe.

[0007] Preferably, the circuit breaker comprises a circuit breaker shell, a bimetallic strip, a tripping locking mechanism, the circuit breaker shell is fixed with an upper static contact and a moving contact, a conductive partition plate is arranged between the static contact and the moving contact, the conductive partition plate is fixedly connected with a guide rod at one end away from the static contact, a guide bracket is arranged on the circuit breaker shell, the guide rod is slidably connected with the guide bracket through the guide bracket, a protrusion is arranged at one end of the guide rod away from the conductive partition plate, a compression spring is arranged between the protrusion and the guide bracket, one end of the bimetallic strip is fixed in the shell, and a locking pin is fixed at the other end of the bimetallic strip, a locking hole is arranged on the guide rod and matched with the locking pin, and a breaking mechanism is arranged in the circuit breaker shell.

[0008] Preferably, the breaking mechanism comprises a rotating rod and an electromagnetic coil, the rotating rod is rotatably connected with the circuit breaker shell at the middle part, one end of the rotating rod is fixedly connected with the moving contact, and the other end of the rotating rod is in contact with the compression rod, the tripping locking mechanism comprises a rotating disc rotatably arranged on the circuit breaker shell, one end of the compression rod is fixed on the rotating disc, and the other end of the compression rod is in contact with the lower part of the one end of the rotating rod away from the moving contact, a driving rod is arranged on the rotating disc, a magnet is arranged on the driving rod and matched with the electromagnetic coil, a blocking rod is rotatably connected with the rotating disc, a blocking block is arranged at one end of the blocking rod close to the driving rod, and a blocking torsion spring is arranged between the blocking pin and the rotating disc.

[0009] Preferably, a limiting rod is rotatably arranged on the circuit breaker shell, a limiting torsion spring is arranged between the limiting rod and the circuit breaker shell, and a reset handle is arranged on the rotating disc.

[0010] The mechanical bimetallic strip temperature protection and electronic protection double backup of the application can reliably act when the temperature reaches 90°C, and the response is rapid, and the comprehensive protection mechanism of overload, overtemperature and overvoltage is realized. The capacitor module can be quickly plugged and replaced independently, the drawer type slide rail structure is supported, the maintenance operation is facilitated, each functional module is independently designed, and the flow line assembly is supported. The circuit breaker can be taken out from the upper part of the upper shell, the maintenance is facilitated, all external terminals are arranged on the front or side of the equipment, the wiring operation is facilitated, the module failure is quickly identified, and the operating parameters are automatically adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the application.

[0012] Figure 2 It is a schematic diagram of the low-voltage capacitor unit structure of the application.

[0013] Figure 3 It is a schematic diagram of the circuit breaker structure of the application.

[0014] Explanation of reference signs: 1, upper shell; 2, lower shell; 3, PCBA main board; 4, PCBA display board; 5, PCBA terminal plate; 6, circuit breaker; 7, zero line copper bar; 8, low-voltage capacitor unit; 10, drawer slide rail; 11, capacitor module; 12, capacitor shell; 14, circuit breaker shell; 15, bimetallic strip; 16, conductive partition plate; 17, guide rod; 18, guide bracket; 19, compression spring; 20, locking pin; 21, rotating rod; 22, electromagnetic coil; 23, pressing rod; 24, rotating disc; 25, driving rod; 26, blocking rod; 27, blocking block; 28, limiting rod; 29, reset handle; 30, static contact; 32, dynamic contact. DETAILED DESCRIPTION

[0015] The specific embodiments of the application are further described in detail below with reference to the accompanying drawings.

[0016] By Figure 1 and Figure 3 give, a combination of convenient capacitor, including lower shell 2, lower shell 2 side is installed with PCBA main board 3, PCBA main board 3 is connected with PCBA display board 4, lower shell 2 the other side is installed with PCBA terminal plate 5, PCBA terminal plate 5 and PCBA main board 3 are connected, characterized in that, the PCBA terminal plate 5 top is equipped with circuit breaker 6, the lower shell 2 upper part is detachably installed with upper shell 1, the circuit breaker 6 is detachably installed on the inner wall of the upper shell 1, the circuit breaker 6 can be taken out from the upper part of the upper shell 1, the PCBA terminal plate 5 is installed directly below the plastic shell circuit breaker 6, and is connected with the PCBA main board 3 through a flexible circuit or a wire harness, all external terminals are arranged on the front or side of the equipment, so that wiring operation is facilitated, the lower part of the lower shell 2 is provided with a low-voltage capacitor unit 8, the low-voltage capacitor unit 8 comprises a capacitor shell 12 which is detachably installed with the lower shell 2, the capacitor shell 12 is provided with at least two capacitor modules 11, the capacitor modules 11 are connected with the PCBA main board 3, each capacitor module 11 is provided with two conductive columns at the bottom, which are respectively crimped or welded with the solder pad on the PCBA main board 3 to realize electrical connection, the capacitor module 11 is installed in the capacitor shell, the drawer slide rail 10 is installed at the bottom of the capacitor shell, the capacitor module 11 is fixed on the drawer slide rail 10, the capacitor module 11 is provided with quick plug conductive columns, the PCBA main board 3 is provided with elastic contacts, and the PCBA main board 3 is integrated with a dynamic capacity adjustment chip. The PCBA main board 3 is integrated with a dynamic capacity adjustment chip (such as a special ASIC), which automatically identifies the number of modules connected and adjusts the charging and discharging parameters.

[0017] The zero line copper bar 7 is welded on the PCBA mainboard 3, and one end of the zero line copper bar 7 extends out of the shell. The zero line copper bar 7 is an L-shaped metal strip, one end of which is welded on the PCBA mainboard 3, and the other end extends out of the side of the shell for the user to access the zero line.

[0018] Assuming that the number of modules is identified as N, the parameter adjustment is based on the following model: Maximum charging current: Ichg_max = N x I cell_safe to ensure that the single module current does not exceed the safety limit; Constant voltage charging threshold V cv = N x V cell_nom x k, k ≈ 0.95-1.05 to avoid overvoltage; Discharge cutoff voltage V cutoff = N x V cell_min to protect the module from deep discharge damage Thermal management threshold T alert = f(N x Ploss) to dynamically adjust the fan strategy according to the total loss power Implementation of adaptive control strategy, Stage 1 (constant current CC) uses Ichg_max to quickly charge to 0.8 x Vcv Stage 2 (constant voltage CV) maintains Vcv until the current drops to 0.05C x N Dynamic adjustment: automatically reduce the current by 10%-20% when the module temperature difference is greater than 5°C Load-following discharge control, Priority logic: graph LR A [Request discharge power P] --> B {P ≤ N x P_max} B -->|Yes| C [Allocate according to demand] B -->|No| D [Limit output to N x P_max] C --> E [Balance module current] When a module is identified as failed (communication loss / voltage anomaly): automatically update the total number N to N-1, recalculate the parameters and trigger an alarm to prevent a chain failure.

[0019] The bottom of each capacitor module 11 is fixed with a copper heat pipe, the front and rear sides of the capacitor shell 12 are provided with heat dissipation fins, and the heat dissipation fins are in contact with the copper heat pipe. In the low-voltage capacitor unit 8, a copper heat pipe (diameter 3mm) is embedded at the bottom of each capacitor module 11, one end of the heat pipe is connected to a capacitor electrode, the other end of the heat pipe is tightly attached to the heat dissipation fin through heat-conducting silicone grease, the heat dissipation fin is an aluminum heat dissipation fin, and a reserved hole position is reserved on the capacitor module 11, and the heat pipe is inserted into the capacitor module 11. A temperature sensor and a current sensor are arranged on each capacitor module. An active heat dissipation fan is mounted on the capacitor shell 12, and a harmonic analysis unit is integrated on the PCBA mainboard 3; when the harmonic distortion rate is greater than 5%, a harmonic compensation mode is started, so that the capacitor harmonic is stable.

[0020] The circuit breaker 6 comprises a circuit breaker shell 14, a bimetallic strip 15 and a tripping locking mechanism, the circuit breaker shell 14 is internally fixed with an upper static contact 30 and a moving contact 32, a conductive partition plate 16 is arranged between the static contact 30 and the moving contact 32, one end of the conductive partition plate 16 away from the static contact is fixedly connected with a guide rod 17, a guide support 18 is arranged on the circuit breaker shell 14, the guide rod 17 is slidably connected with the guide support 18 by penetrating through the guide support 18, one end of the guide rod 17 away from the conductive partition plate 16 is provided with a protrusion, the guide rod 17 is provided with a compression spring 19 located between the protrusion and the guide support 18, one end of the bimetallic strip 15 is fixed in the shell, and the other end of the bimetallic strip 15 is fixed with a locking pin 20, the guide rod 17 is provided with a locking hole matched with the locking pin 20, and a breaking mechanism is mounted in the circuit breaker shell 14. The static contact 30 and the moving contact 32 are point-connected through the conductive partition plate 16, the circuit breaker 6 is provided with an electromagnetic coil 22, the moving contact 32 is connected with an external terminal through the electromagnetic coil 22, the moving contact 32 is connected with a wiring terminal fixed on the shell, the moving contact 32 is connected with the breaking mechanism, and the breaking mechanism is matched with the coil to realize that the moving contact 32 is separated from the static contact 30 when the current overload occurs. The tripping locking mechanism is matched with the breaking mechanism to prevent the moving contact 32 from contacting the static contact 30 again after overload breaking. The breaking mechanism and the tripping locking mechanism are both commonly used mechanisms. The improvement of the present application is that a conductive partition plate 16 which can be separated is arranged between the moving contact 32 and the static contact 30, when the temperature of the circuit breaker 6 rises to a predetermined temperature, the bimetallic strip 15 deforms, and then the locking pin 20 is separated from the locking hole, then under the action of the compression spring 19, the guide rod 17 drives the conductive partition plate 16 to move away from the static contact 30, the moving contact 32 and the static contact 30 are separated from the conductive partition plate 16, and then the moving contact 32 and the static contact 30 are separated from the conductive contact, so as to realize the power-off between the two. After the fault is solved, the bimetallic strip 15 drives the locking pin 20 to reset, then pushes the guide rod 17, so that the locking pin 20 enters the locking hole, and then the conductive partition plate 16 is located between the moving contact 32 and the static contact 30.

[0021] The disconnecting mechanism comprises a rotating rod 21, an electromagnetic coil 22, the middle part of the rotating rod 21 is rotationally connected with the circuit breaker shell 14, one end of the rotating rod 21 is fixedly connected with the moving contact 32, and the other end of the rotating rod 21 is in contact with the lower part of the other end of the pressure rod 23, the pressure rod 23 is fixed on the rotating disc 24, the other end of the pressure rod 23 is in contact with the lower part of the other end of the rotating rod 21, the driving rod 25 is installed on the rotating disc 24, the magnet cooperating with the electromagnetic coil 22 is arranged on the driving rod 25, the blocking rod 26 is rotationally connected with the rotating disc 24, the blocking block 27 is arranged on the end of the blocking rod 26 close to the driving rod 25, and the blocking torsional spring is arranged between the blocking rod 26 and the rotating disc 24.

[0022] The limiting rod 28 is rotationally installed on the circuit breaker shell 14, the limiting torsional spring is arranged between the limiting rod 28 and the circuit breaker shell 14, and the reset handle 29 is installed on the rotating disc 24. When the current is overloaded, the electromagnetic coil 22 drives the magnet to move in the direction of the electromagnetic coil 22, thereby driving the rotating disc 24 to rotate, the blocking rod 26 overcomes the torque of the blocking spring and rotates, thereby the pressure rod 23 drives the rotating rod 21 to rotate, so that the moving contact 32 is separated from the static contact 30. After the fault is removed, the reset handle 29 is rotated, the blocking rod 26 is in contact with the blocking block 27 and cannot rotate, the blocking rod 26 drives the limiting rod 28 to overcome the torque of the limiting torsional spring and then rotates, so that the blocking rod 26 is reset to the other side of the limiting rod 28, and the torque of the limiting torsional spring is greater than the torque of the blocking spring. The structure can form double backup through adjustment of the bimetallic strip 15 and electronic temperature protection, the mechanical temperature-driven tripping device realizes temperature protection through thermal deformation of the bimetallic strip 15 to mechanical transmission and then a pure mechanical path of tripping, and has the advantages of reliable action, rapid response, no influence of power supply and the like. The key lies in accurate matching of selection of the bimetallic strip 15, transmission ratio design and the mechanical locking mechanism, so as to ensure reliable action at the set temperature.

[0023] The mechanical bimetallic strip 15 temperature protection and electronic protection double backup, reliable action at 90°C, rapid response, comprehensive protection mechanism of overload, overtemperature and overvoltage; The capacitor module 11 is realized to be quickly plugged and replaced independently, the drawer type slide rail 10 structure is supported, maintenance operation is facilitated, each functional module is independently designed, and pipeline assembly is supported; The circuit breaker 6 can be taken out from the upper part of the upper shell 1, maintenance is facilitated, all external terminals are arranged on the front or side of the equipment, wiring operation is facilitated, module failure is quickly identified, and operating parameters are automatically adjusted.

[0024] The above described embodiments are not intended to limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design concept of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A conveniently assembled capacitor, comprising a lower housing (2), a PCBA main board (3) mounted on one side of the lower housing (2), a PCBA display board (4) connected to the PCBA main board (3), and a PCBA terminal board (5) mounted on the other side of the lower housing (2), the PCBA terminal board (5) being connected to the PCBA main board (3), characterized in that, A circuit breaker (6) is provided above the PCBA terminal board (5). An upper housing (1) is detachably installed on the upper part of the lower housing (2). The circuit breaker (6) is detachably installed on the inner wall of the upper housing (1). The circuit breaker (6) can be removed from the upper part of the upper housing (1). A low-voltage capacitor unit (8) is provided at the lower part of the lower housing (2). The low-voltage capacitor unit (8) includes a capacitor housing (12) that is fixed and detachably installed with the lower housing (2). The capacitor housing (12) is provided with at least two capacitor modules (11). The capacitor modules (11) are connected to the PCBA main board (3). The capacitor modules (11) are installed inside the capacitor housing. A drawer-type slide rail (10) is installed at the bottom of the capacitor housing. The capacitor modules (11) are fixed on the drawer-type slide rail (10). The capacitor modules (11) are provided with quick-connect conductive posts. The PCBA main board (3) is provided with elastic contacts. A dynamic capacitance adjustment chip is integrated on the PCBA main board (3).

2. The conveniently assembled capacitor according to claim 1, characterized in that, The PCBA motherboard (3) is soldered with a neutral wire copper busbar (7), one end of which extends out of the housing.

3. The conveniently assembled capacitor according to claim 1, characterized in that, Each capacitor module (11) has a copper heat pipe fixed at its bottom, and the capacitor housing (12) has heat dissipation fins on both the front and rear sides, which are in contact with the copper heat pipe.

4. The conveniently assembled capacitor according to claim 1, characterized in that, The circuit breaker (6) includes a circuit breaker housing (14), a bimetallic strip (15), and a tripping locking mechanism. An upper stationary contact (30) and a moving contact (32) are fixed inside the circuit breaker housing (14). A conductive partition (16) is provided between the stationary contact (30) and the moving contact (32). A guide rod (17) is fixedly connected to one end of the conductive partition (16) away from the stationary contact. A guide bracket (18) is provided on the circuit breaker housing (14), and the guide rod (17) passes through the guide bracket. The bracket (18) is slidably connected to the guide bracket (18). The guide rod (17) has a protrusion at one end away from the conductive partition (16). The guide rod (17) has a compression spring (19) located between the protrusion and the guide bracket (18). One end of the bimetallic strip (15) is fixed inside the housing, and the other end is fixed with a locking pin (20). The guide rod (17) has a locking hole that cooperates with the locking pin (20). The circuit breaker housing (14) is equipped with a disconnection mechanism.

5. The conveniently assembled capacitor according to claim 4, characterized in that, The disconnection mechanism includes a rotating rod (21) and an electromagnetic coil (22). The middle part of the rotating rod (21) is rotatably connected to the circuit breaker housing (14). One end of the rotating rod (21) is fixedly connected to the moving contact (32), and the other end is connected to a pressure rod (23). The tripping locking mechanism includes a turntable (24) rotatably mounted on the circuit breaker housing (14). One end of the pressure rod (23) is fixed on the turntable (24), and the other end is in contact with the lower part of the end of the rotating rod (21) away from the moving contact (32). A drive rod (25) is mounted on the turntable (24). A magnet that cooperates with the electromagnetic coil (22) is provided on the drive rod (25). A blocking rod (26) is rotatably connected to the turntable (24). A blocking block (27) is provided at the end of the blocking pin near the drive rod (25). A blocking torsion spring is installed between the blocking pin and the turntable (24).

6. The conveniently assembled capacitor according to claim 5, characterized in that, A limit rod (28) is rotatably mounted on the circuit breaker housing (14), and a limit torsion spring is provided between the limit rod (28) and the circuit breaker housing (14). A reset handle (29) is mounted on the turntable (24).

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