A bipolar double-trip single-pole double-throw combination switch device

Abstract

The utility model relates to a kind of bipolar double three-blade single-throw combination switch devices, it includes: first three-blade single-throw switch and second three-blade single-throw switch, the first three-blade single-throw switch and second three-blade single-throw switch mechanical interlock;The throw position contact of the first three-blade single-throw switch and the corresponding throw position end contact of the second three-blade single-throw switch are connected in series by one-way conducting element;The movable contact of the first three-blade single-throw switch and the second three-blade single-throw switch are connected to multiple power supplies after parallel connection;The static contact of the first three-blade single-throw switch and the second three-blade single-throw switch are connected to load after cross connection.The bipolar double three-blade single-throw combination switch provided by the utility model is strong in bipolar adaptability, high stability, supports positive and negative bipolar convergence mode switching, and adapts to different load demand.

Description

Technical Field

[0001] This utility model belongs to the field of high-frequency power electronics technology, specifically relating to a bipolar double triple-pole single-throw combination switch device. Background Technology

[0002] In high-frequency boost rectifier systems, traditional busbars, employing a unipolar design with a single switch and multiple parallel copper rods, struggle to meet the demands of modern industry for bipolar power supply. A single switch supports only a single current direction, failing to establish a bidirectional current transmission path. While parallel copper rods can increase current carrying capacity to some extent, they cannot alter the unipolar nature. When the load requires bipolar power, this design cannot achieve flexible switching and coordinated operation of the positive and negative lines. The extensive use of copper rods not only significantly increases costs but also exacerbates electromagnetic coupling between modules due to the complex circuit structure, leading to mutual interference and severely impacting system stability. Furthermore, the unipolar design has a low current carrying capacity, making it even more difficult to meet the stringent current transmission requirements of bipolar power supply in high-voltage, high-current scenarios.

[0003] With the rapid development of fields such as high-voltage direct current transmission, the demand for bipolar power supply is increasing, and the unipolar defects of traditional devices have become a technical bottleneck in the industry. Utility Model Content

[0004] To meet the requirements of bipolar power supply for flexibility, adaptability, and stability in current transmission capability, the first aspect of this utility model provides a bipolar double three-pole single-throw combination switch device, comprising: a first three-pole single-throw switch and a second three-pole single-throw switch, the first three-pole single-throw switch and the second three-pole single-throw switch being mechanically interlocked; the throw contact of the first three-pole single-throw switch and the corresponding throw terminal contact of the second three-pole single-throw switch being connected in series through a unidirectional conductive element; the moving contacts of the first three-pole single-throw switch and the second three-pole single-throw switch being connected in parallel and then connected to the bipolar power supply; and the stationary contacts of the first three-pole single-throw switch and the second three-pole single-throw switch being cross-connected and then connected to the load.

[0005] In some embodiments of this utility model, the first three-pole single-throw switch includes multiple contacts and a first control switch SP1; the second three-pole single-throw switch includes multiple contacts and a second control switch SP2; the first control switch SP1 and the second control switch SP2 are electrically interlocked.

[0006] Furthermore, the first three-pole single-throw switch includes contacts A1, A2, A3, A4, A5, and A6; the second three-pole single-throw switch includes contacts B1, B2, B3, B4, B5, and B6.

[0007] Furthermore, contact A1 is electrically connected to contact B5 and the load respectively; contact A2 is electrically connected to one pole of the second power supply and contact B6 respectively; contact A3 is electrically connected to contact B3 and the load respectively; contact A4 is electrically connected to contact A5 and contact B1 respectively; contact A5 is electrically connected to contact B2; contact A6 is electrically connected to the other pole of the second power supply and contact B4 respectively; contact B4 is electrically connected to one pole of the first power supply; and contact B6 is electrically connected to the other pole of the first power supply.

[0008] Preferably, the first three-pole single-throw switch includes multiple sets of normally open contact pairs.

[0009] More preferably, the multiple sets of normally open contact pairs include: A1-A4, A2-A5 and A3-A6.

[0010] Preferably, the second or third-pole single-throw switch includes multiple sets of normally open contact pairs.

[0011] More preferably, the multiple sets of normally open contact pairs include: B1-B4, B2-B5, and B3-B6.

[0012] Furthermore, contact A4 and contact A5 are connected by a unidirectional conductive element.

[0013] In some embodiments of this utility model, the bipolar power supply is a capacitive power supply.

[0014] The beneficial effects of this utility model are: This invention focuses on the forefront of high-frequency power electronics technology and develops a bipolar dual triple-pole single-throw switch device with high current-carrying capacity to address the bipolar power supply requirements of loads. This device overcomes the limitations of traditional unipolar power supply by achieving flexible switching and multiplexing of positive and negative polarity lines through the coordinated operation of two triple-pole single-throw switches, demonstrating outstanding performance in high-voltage, high-current charging scenarios of high-frequency boost rectifier systems. While ensuring a charging capacity of up to 85kA, the device significantly reduces the amount of copper rods used, optimizes the system structure, and effectively enhances system stability and reliability. With a precise coordinated control strategy, this device can efficiently connect and isolate the front-end capacitor-type power module from the downstream load, completely eliminating mutual interference between modules and providing an innovative solution for bipolar power supply systems. Attached Figure Description

[0015] Figure 1 This is one of the schematic diagrams of the bipolar double triple-pole single-throw combination switch device in some embodiments of this utility model; Figure 2 This is the second schematic diagram of the principle of the bipolar double triple-pole single-throw combination switch device in some embodiments of this utility model; Figure 3This is a schematic diagram of the positive polarity conducting switch state of the bipolar double triple-pole single-throw combination switch device in some embodiments of this utility model; Figure 4 This is a schematic diagram of the negative polarity conducting switch state of the bipolar double triple-pole single-throw combination switch device in some embodiments of this utility model; Figure 5 This is one of the schematic diagrams of the internal contact structure of a bipolar double triple-pole single-throw combination switch in some embodiments of this utility model; Figure 6 This is a schematic diagram of the discharge circuit of the capacitor power module 1 when the bipolar double triple-pole single-throw combination switch is turned on in some embodiments of this utility model. Figure 7 This is a schematic diagram of the discharge circuit of the capacitor power module 2 when the bipolar double triple-pole single-throw combination switch is turned on in some embodiments of this utility model. Figure 8 This is a schematic diagram illustrating the actual application of the bipolar double triple-pole single-throw combination switch in some embodiments of this utility model. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0017] refer to Figure 1 and Figure 2 In a first aspect, this utility model provides a bipolar double three-pole single-throw combination switch device, comprising: a first three-pole single-throw switch and a second three-pole single-throw switch, the first three-pole single-throw switch and the second three-pole single-throw switch being mechanically interlocked; the throw contact of the first three-pole single-throw switch and the corresponding throw terminal contact of the second three-pole single-throw switch being connected in series through a unidirectional conductive element; the moving contacts of the first three-pole single-throw switch and the second three-pole single-throw switch being connected in parallel and then connected together to a bipolar power supply; and the stationary contacts of the first three-pole single-throw switch and the second three-pole single-throw switch being cross-connected and then connected together to a load.

[0018] It is understood that the bipolar double three-pole single-throw combination switch device of this utility model, through the coordinated operation of two three-pole single-throw combination switches, accurately constructs a switching and multiplexing mechanism for positive and negative polarity lines, which not only meets the bipolar power supply requirements of diverse loads, but also significantly improves system performance, injecting new impetus into the development of high-frequency power electronics technology.

[0019] In some embodiments of this utility model, the first three-pole single-throw switch includes multiple contacts and a first control switch SP1; the second three-pole single-throw switch includes multiple contacts and a second control switch SP2; the first control switch SP1 and the second control switch SP2 are electrically interlocked.

[0020] Specifically, this double triple-pole single-throw combination switch device mainly consists of two triple-pole single-throw switches, SP1 and SP2. Their input terminals are respectively connected to two sets of capacitor-type power supply modules, which combine and transmit the large current from the two modules to the load. Its circuit diagram is shown below. Figure 1 As shown, the three-pole single-throw combination switch is the core component. Its internal contact switching structure is adapted to a copper rod with a diameter of 16mm. It can carry a large current of not less than 85kA through the parallel conduction of multiple contacts.

[0021] It should be noted that since capacitors are unidirectionally charged, the end with the higher potential is defined as the positive busbar, and the other end as the negative busbar. The bipolar double triple-pole single-throw switch serves as an isolating switch between the capacitor-type power supply and the busbar. When this module is not needed, both triple-pole single-throw switches of this module must be set to the open state. This completely disconnects the main components of the module, such as the capacitor's positive and negative busbars, from the busbar, ensuring no impact on this module when other capacitor-type power supply modules are operating. This bipolar double triple-pole single-throw switch enables bipolar conduction, meeting the usage requirements of different load scenarios.

[0022] refer to Figure 3 When the three-pole single-throw switch SP1 is turned on and SP2 is turned off, its conduction circuit is the circuit shown in red in Figure 3. At this time, the power supply is output with positive polarity, the negative busbar of the capacitor is grounded, the capacitor is subjected to positive high voltage, and a positive current is generated. refer to Figure 4 When the three-pole single-throw switch SP2 is on and SP1 is off, its conduction circuit is as follows: Figure 4 The circuit shown in red is in a negative polarity output state. The positive busbar of the capacitor is grounded, and the capacitor is subjected to a negative high voltage, generating a reverse current.

[0023] Based on the above-mentioned bipolar double triple-pole single-throw combination switch, the first triple-pole single-throw switch includes contacts A1, A2, A3, A4, A5 and A6; the second triple-pole single-throw switch includes contacts B1, B2, B3, B4, B5 and B6.

[0024] Furthermore, contact A1 is electrically connected to contact B5 and the load respectively; contact A2 is electrically connected to one pole of the second power supply and contact B6 respectively; contact A3 is electrically connected to contact B3 and the load respectively; contact A4 is electrically connected to contact A5 and contact B1 respectively; contact A5 is electrically connected to contact B2; contact A6 is electrically connected to the other pole of the second power supply and contact B4 respectively; contact B4 is electrically connected to one pole of the first power supply; and contact B6 is electrically connected to the other pole of the first power supply.

[0025] refer to Figure 5 When control switch SP1 is closed, the internal contacts B1 and B4, B2 and B5, and B3 and B6 are connected, and the front-stage capacitor power supply module provides positive current to the load. When control switch SP2 is closed, the internal contacts A1 and A4, A2 and A5, and A3 and A6 are connected, and the front-stage capacitor power supply module provides negative current to the load.

[0026] refer to Figure 6 It shows the circuit diagram of the capacitor power module 1 discharging when the bipolar double triple-pole single-throw combination switch is turned on, where the red dashed line intuitively indicates the specific direction of the conduction current.

[0027] When the control switch SP1 is closed, the front-stage capacitor-type power module 1 enters the discharge state. The current starts from the internal contact B4 of SP1, flows out through B1, is conducted through the thyristor to B2 and B5, then flows to the internal contact A1 of SP2, then through the load, flows out from the negative terminal of the load to the contact A3 of SP2, and finally returns to the contacts B3 and B6 of SP1, forming a complete closed circuit. At this time, positive current is provided to the load.

[0028] When control switch SP2 is closed, the front-stage capacitor-type power module 1 initiates its discharge process. Current is output from contact B4 of SP1, flows sequentially through contacts A6 and A3 of SP2, then enters from the negative terminal of the load, undergoes energy conversion within the load, flows out from the positive terminal, and then enters contacts A1 and A4 of SP2. Under the trigger control of the thyristor, the current continues to be conducted to contacts A5 and A2 of SP2, and finally flows back to contact B6 of SP1, forming a complete current closed loop. In this operating mode, the front-stage capacitor-type power module outputs a negative current to the load, meeting the power supply requirements under specific operating conditions.

[0029] refer to Figure 7 This diagram illustrates the discharge circuit of the capacitor-type power module 2 when the bipolar double triple-pole single-throw combination switch is on. When the control switch SP1 is closed, the front-stage capacitor-type power module 2 enters the discharge mode. Current is introduced by the external connecting copper rod, conducted through the internal contact B4 of SP1 to B1, flows through the thyristors to B2 and B5, and then flows to the internal contact A1 of SP2. After passing through the load, the current flows out from its negative terminal to the SP2 contact A3, then returns to the SP1 contacts B3 and B6, and finally is conducted through the external copper rod to the SP2 contact A2, forming a complete current closed loop. During this process, the front-stage capacitor-type power module 2 outputs a positive current to the load, ensuring stable power supply to the system.

[0030] When control switch SP2 is closed, its internal contacts A1 and A4, A2 and A5, and A3 and A6 are simultaneously turned on, and the front-stage capacitor-type power module 2 immediately starts its discharge program. In this operating state, current flows from contact A6 of SP2 to contact A3, then flows into the negative terminal of the load, completes energy conversion at the load, and flows out from the positive terminal, entering contacts A1 and A4 of SP2. Under the triggering action of the thyristor, the current is further conducted to contacts A5 and A2, ultimately forming a complete closed circuit, enabling the front-stage capacitor-type power module 2 to output negative current to the load, meeting the power supply requirements under specific operating conditions.

[0031] refer to Figure 8 It indicates the circuit conduction status; in the practical engineering application of bipolar double triple-pole single-throw combination switches, when the two capacitor-type power modules start discharging synchronously and work together to supply power to the load, its unique bipolar circuit conduction mechanism shows significant advantages.

[0032] This combination switch, based on a bipolar design concept, constructs independent yet coordinated transmission paths for positive and negative currents through the precise coordination of two sets of three-pole switch contacts. In scenarios where two capacitor-type power modules discharge in parallel, the combination switch innovatively integrates the independently laid positive and negative power supply lines required in traditional unipolar designs. Through selective contact conduction, it allows both independent transmission of positive and negative currents while enabling the sharing of critical line resources, achieving efficient reuse of line resources. This design significantly reduces the actual number of copper rods required, simplifies system wiring, and substantially lowers system hardware costs.

[0033] Meanwhile, leveraging the core design advantages of its bipolar double triple-pole single-throw switch, its powerful 85kA total current carrying capacity is fully realized in bipolar power supply scenarios. Unlike traditional unipolar power supply solutions that only support current transmission in one direction, this switch, based on a bipolar architecture, constructs an independent yet coordinated current transmission network for positive and negative polarities. When the two modules operate synchronously, the switch, through a precise contact control strategy, can dynamically adjust the transmission paths of the positive and negative currents, ensuring that the positive and negative currents do not interfere with each other under complex operating conditions, thus fundamentally eliminating the risk of localized overload caused by a single current direction.

[0034] In high-voltage, high-current applications, the bipolar power supply mode exhibits unparalleled adaptability. Whether facing loads with different positive and negative power supply requirements, or special operating conditions necessitating frequent current direction switching, this combination switch can flexibly adjust its power supply strategy thanks to its bipolar line multiplexing design. By monitoring load demand in real time and precisely controlling the conduction and interruption of positive and negative currents, it ensures that current is transmitted to the load stably and efficiently via the optimal path. This not only significantly improves power supply efficiency but also substantially enhances the system's anti-interference capability and fault tolerance under extreme conditions, comprehensively meeting the stringent requirements of high-power loads for power supply stability and safety.

[0035] This innovative design, which deeply integrates bipolar line multiplexing and large current-carrying capacity, not only maximizes cost control and resource utilization efficiency, but also provides a new solution for high-power power supply applications such as high-frequency boost rectifier systems that provide bipolar power to loads.

[0036] The bipolar double triple-pole single-throw combination switch device of the present invention, through the coordinated operation of two triple-pole single-throw combination switches, accurately constructs a switching and multiplexing mechanism for positive and negative polarity lines, which not only meets the bipolar power supply requirements of diverse loads, but also significantly improves system performance, injecting new impetus into the development of high-frequency power electronics technology.

[0037] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bipolar double triple-pole single-throw combination switch device, characterized in that, include: The first three-pole single-throw switch and the second three-pole single-throw switch are mechanically interlocked; The throw-position contact of the first three-pole single-throw switch and the corresponding throw-position contact of the second three-pole single-throw switch are connected in series through a unidirectional conductive element. The moving contacts of the first three-pole single-throw switch and the second three-pole single-throw switch are connected in parallel and then connected to a bipolar power supply; the stationary contacts of the first three-pole single-throw switch and the second three-pole single-throw switch are cross-connected and then connected to the load.

2. The bipolar double triple-pole single-throw combination switch device according to claim 1, characterized in that, The first three-pole single-throw switch includes multiple contacts and a first control switch SP1; The second- and third-pole single-throw switch includes multiple contacts and a second control switch SP2; The first control switch SP1 and the second control switch SP2 are electrically interlocked.

3. The bipolar double triple-pole single-throw combination switch device according to claim 2, characterized in that, The first three-pole single-throw switch includes contacts A1, A2, A3, A4, A5, and A6. The second three-pole single-throw switch includes contacts B1, B2, B3, B4, B5 and B6.

4. The bipolar double triple-pole single-throw combination switch device according to claim 3, characterized in that, Contact A1 is electrically connected to contact B5 and the load respectively; contact A2 is electrically connected to one pole of the second power supply and contact B6 respectively; contact A3 is electrically connected to contact B3 and the load respectively. Contact A4 is electrically connected to contact A5 and contact B1 respectively; contact A5 is electrically connected to contact B2; contact A6 is electrically connected to the other pole of the second power supply and contact B4 respectively. Contact B4 is electrically connected to one pole of the first power supply; contact B6 is electrically connected to the other pole of the first power supply.

5. The bipolar double triple-pole single-throw combination switch device according to claim 4, characterized in that, The first three-pole single-throw switch includes multiple sets of normally open contact pairs.

6. The bipolar double triple-pole single-throw combination switch device according to claim 5, characterized in that, The multiple sets of normally open contact pairs include: A1-A4, A2-A5, and A3-A6.

7. The bipolar double triple-pole single-throw combination switch device according to claim 4, characterized in that, The second and third pole single-throw switches include multiple sets of normally open contact pairs.

8. The bipolar double triple-pole single-throw combination switch device according to claim 7, characterized in that, The multiple sets of normally open contact pairs include: B1-B4, B2-B5, and B3-B6.

9. The bipolar double triple-pole single-throw combination switch device according to claim 3, characterized in that, Contact A4 and contact A5 are connected by a unidirectional conductive element.

10. The bipolar double triple-pole single-throw combination switch device according to any one of claims 1 to 9, characterized in that, The bipolar power supply is a capacitive power supply.

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