Hybrid solid-state contactor and control method thereof

Abstract

The invention discloses a hybrid solid state contactor and a control method thereof. Relates to the technical field of switch control. A solid state switch; a mechanical switch power supply circuit; a mechanical switch driving circuit; a solid-state switch driving circuit; the input end of the time sequence chip is connected with an auxiliary contact of the mechanical switch through a mechanical switch driving circuit, the first output end of the time sequence chip is connected with the solid-state switch through a solid-state switch driving circuit, and the second output end of the time sequence chip is connected with the mechanical switch through a mechanical switch power supply circuit. According to the invention, the problems of complex structure and inconvenient operation of the hybrid solid state contactor in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the field of switch control technology, and in particular to a hybrid solid-state contactor and a control method thereof. Background Art

[0002] In energy storage applications, energy storage battery packs need to frequently perform high-current charging and discharging operations, which places high demands on the electrical life of the switch. In the prior art, mechanical switches are prone to arcing when opening, and cannot meet the electrical life requirements under frequent on-off conditions; while solid-state switches have fast breaking speeds and arc-free breaking, but they have large current losses and high heat generation. In order to combine the advantages of both, a hybrid solid-state contactor was designed, in which mechanical switches and solid-state switches are used in parallel, and the timing control of opening and closing is realized through intelligent control devices such as microcontroller units (MCUs). This MCU-based hybrid solid-state contactor also has some limitations. First, the introduction of MCU makes the hardware design of the product more complicated, increasing the design difficulty and development cycle. Secondly, in the production process, the use of MCU requires an additional software burning process, which not only increases production costs, but also reduces production efficiency.

[0003] Currently, no effective solution has been proposed for the problems of complex structure and inconvenient operation of hybrid solid-state contactors in related technologies. Summary of the invention

[0004] The main purpose of the present application is to provide a hybrid solid-state contactor and a control method thereof, so as to solve the problems of complex structure and inconvenient operation of the hybrid solid-state contactor in the related art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a hybrid solid-state contactor is provided. The hybrid solid-state contactor comprises: a mechanical switch, on which an auxiliary contact is provided; a solid-state switch; a mechanical switch power supply circuit; a mechanical switch drive circuit; a solid-state switch drive circuit; a timing chip, wherein an input end of the timing chip is connected to the auxiliary contact of the mechanical switch through the mechanical switch drive circuit, a first output end of the timing chip is connected to the solid-state switch through the solid-state switch drive circuit, and a second output end of the timing chip is connected to the mechanical switch through the mechanical switch power supply circuit.

[0006] Furthermore, the solid-state switch includes at least a pair of semiconductor devices connected in reverse series.

[0007] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a hybrid solid-state contact control method is provided. The method comprises: receiving an external control signal through a mechanical switch driving circuit; controlling the mechanical switch to perform an opening or closing operation according to the external control signal; when detecting that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a state signal to the timing chip through the mechanical switch driving circuit; the input end of the timing chip receives the state signal fed back by the auxiliary contact; the first output end of the timing chip sends an execution signal to the solid-state switch through the solid-state switch driving circuit according to the state signal, wherein the execution signal includes a conduction signal or a shutdown signal; the solid-state switch performs a conduction operation or a shutdown operation according to the execution signal.

[0008] Furthermore, according to the external control signal, controlling the mechanical switch to perform the opening or closing operation includes: when the external control signal is a dry contact input set high, controlling the mechanical switch to perform the closing operation; when the external control signal is a dry contact input set low and the solid-state switch is detected to be in the on state, controlling the mechanical switch to perform the opening operation.

[0009] Furthermore, when it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a status signal to the timing chip, including: when it is detected that the mechanical switch performs a closing operation, the state of the auxiliary contact changes according to the mechanical switch performing the closing operation; the mechanical switch drive circuit transmits a first status signal to the timing chip, and the enable signal of the timing chip is set high, wherein the first status signal is a signal generated corresponding to the state change of the auxiliary contact according to the mechanical switch performing the closing operation.

[0010] Furthermore, when it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a status signal to the timing chip through the mechanical switch drive circuit, including: when it is detected that the mechanical switch performs an opening operation, the state of the auxiliary contact changes according to the opening operation of the mechanical switch; the mechanical switch drive circuit transmits a second status signal to the timing chip, and the enable signal of the timing chip is set low, wherein the second status signal is a signal generated corresponding to the state change of the auxiliary contact according to the opening operation of the mechanical switch.

[0011] Furthermore, after the solid-state switch performs a shutdown operation according to an execution signal, the method includes: the timing chip sets the voltage regulation signal to low; the mechanical switch power supply circuit converts the voltage regulation signal into a power conversion signal; and according to the power conversion signal, the driving voltage of the mechanical switch is restored to a target value.

[0012] Further, after the solid-state switch performs a turn-on operation or a turn-off operation according to the execution signal, the method includes: the timing chip outputs a feedback signal.

[0013] According to another aspect of the present application, a readable storage medium is provided, on which a program or instruction is stored, and when the program or instruction is executed by a processor, a control method for a hybrid solid-state contactor as in any of the above technical solutions is implemented. Therefore, the readable storage medium has all the beneficial effects of the control method for a hybrid solid-state contactor in any of the above technical solutions, which will not be repeated here.

[0014] According to another aspect of the present application, a control device for a hybrid solid-state contactor is provided, comprising a processor and a memory, wherein a program or instruction is stored in the memory, and when the program or instruction is executed by the processor, the steps of the control method for the hybrid solid-state contactor in any of the above technical solutions are implemented. Therefore, the control device for the hybrid solid-state contactor has all the beneficial effects of the control method for the hybrid solid-state contactor in any of the above technical solutions, which will not be repeated here.

[0015] The control method of the hybrid solid-state contactor in the technical solution receives an external control signal through a mechanical switch driving circuit; controls the mechanical switch to perform an opening or closing operation according to the external control signal; when detecting that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a state signal to the timing chip through the mechanical switch driving circuit; the input end of the timing chip receives the state signal fed back by the auxiliary contact; the first output end of the timing chip sends an execution signal to the solid-state switch through the solid-state switch driving circuit according to the state signal, wherein the execution signal includes a conduction signal or a shutdown signal; the solid-state switch performs a conduction operation or a shutdown operation according to the execution signal, thereby solving the problem of complex structure and inconvenient operation of the hybrid solid-state contactor in the related art. In the present application, the hybrid solid-state contactor is controlled to open and close by a timing chip, thereby achieving the technical effect of small size, simple operation and high reliability of the hybrid solid-state contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A circuit diagram of a hybrid solid-state contactor in an embodiment of the present invention is shown; Figure 2 is a flow chart of a control method for a hybrid solid-state contactor provided according to an embodiment of the present application; Figure 3 is a schematic diagram of a closing control method of a hybrid solid-state contactor provided according to an embodiment of the present application; Figure 4 is a schematic diagram of a hybrid solid-state contactor opening control method provided according to an embodiment of the present application; Figure 5 is a structural block diagram of an electronic device according to an embodiment of the present application; Among them, 10 is a hybrid solid-state contactor, 101 is a mechanical switch, 1011 is an auxiliary contact, 102 is a solid-state switch, 103 is a mechanical switch power supply circuit, 104 is a mechanical switch drive circuit, 105 is a solid-state switch drive circuit, and 106 is a timing chip. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0018] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0019] Example 1 According to the embodiment of the present application, Figure 1 As shown, a hybrid solid-state contactor 10 is proposed, comprising: A mechanical switch 101 is provided with an auxiliary contact 1011; Solid state switch 102; Mechanical switch power supply circuit 103; Mechanical switch driving circuit 104; A solid-state switch driving circuit 105, wherein the solid-state switch driving circuit 105 is connected to the solid-state switch 102; The timing chip 106 has an input end connected to the auxiliary contact of the mechanical switch through the mechanical switch driving circuit 103, a first output end of the timing chip is connected to the solid-state switch through the solid-state switch driving circuit 105, and a second output end of the timing chip is connected to the mechanical switch through the mechanical switch power supply circuit 104.

[0020] Optionally, the timing chip 106 is an integrated circuit for controlling and managing the timing of the actions of various components in the circuit. The timing chip ensures that multiple electronic components or modules perform operations in a preset order and time interval through precise time control, thereby realizing complex control logic and functions. In a hybrid solid-state contactor, the role of the timing chip is particularly important. It is responsible for coordinating the opening and closing actions of the mechanical switch and the solid-state switch to ensure the reliability and performance of the system. The input end of the timing chip is connected to the auxiliary contact of the mechanical switch to receive feedback signals of the state change of the mechanical switch, which can indicate the closing or opening state of the mechanical switch. The timing chip can send control signals (such as turn-on signals or turn-off signals) to the solid-state switch through its first output end. These signals ensure that the solid-state switch is turned on or off according to a predetermined timing after the mechanical switch is actuated. The timing chip sends voltage regulation signals to the mechanical switch power supply circuit through its second output end. These signals are used to adjust the driving voltage of the mechanical switch coil, such as reducing the holding voltage after closing to reduce power consumption, or restoring the rated voltage when opening for fast closing.

[0021] Optionally, the hybrid solid-state contactor 10 may further include an interlocking circuit. The timing chip is connected to the interlocking circuit via an interlocking signal output terminal, which can ensure the coordinated operation of the mechanical switch and the solid-state switch. The interlocking function can prevent false operation and ensure the reliability and safety of the system.

[0022] Optionally, the hybrid solid-state contactor 10 may also include a surge absorption circuit, which is used to suppress and absorb transient voltages (surges) generated in the circuit due to switching actions, load mutations or other reasons. The surge absorption circuit may be composed of the following components: Varistor: a nonlinear resistance element whose resistance changes with voltage. When the voltage exceeds a certain threshold, the resistance of the varistor drops sharply, discharging the excess energy to the ground. RC absorption circuit (resistor + capacitor): The RC absorption circuit absorbs transient energy through a combination of resistors and capacitors. The resistor limits the current and the capacitor stores energy, thereby smoothing the transient voltage. Diode clamping circuit: The diode clamping circuit uses the unidirectional conductivity of the diode to clamp the transient voltage within a safe range. Filter inductors and capacitors: Filter inductors and capacitors can smooth current and voltage fluctuations and reduce the impact of transient voltages. The main function of the surge absorption circuit is to protect sensitive electronic components (such as semiconductor devices, mechanical switch contacts, etc.) from damage by transient high voltages, thereby improving the reliability and life of the system.

[0023] In summary, the above timing chip can accurately control the action timing of each component in the hybrid solid-state contactor, and realize timing control through hardware circuit, avoiding the use of complex microcontroller (MCU) and software programming, simplifying the design and production process. It also reduces the possibility of software errors and hardware failures, and improves the overall reliability of the system.

[0024] In an optional embodiment, the solid-state switch 102 includes at least a pair of semiconductor devices connected in reverse series.

[0025] Optionally, a pair of reverse-series semiconductor devices can be a pair of reverse-series transistors, such as two NPN or PNP bipolar junction transistors (BJTs) or MOSFET transistors, which achieve bidirectional current control by reverse-series connection. It can also be a pair of reverse-series thyristors, such as two ordinary thyristors or bidirectional thyristors (TRIACs), which achieve controllable unidirectional or bidirectional current control by reverse-series connection. Or other suitable semiconductor devices, such as reverse-series IGBTs (insulated gate bipolar transistors) or other similar power electronic devices. By adopting a reverse-series structure, the solid-state switch 102 can adapt to the needs of bidirectional current flow, and quickly cut off the current when opening the gate, effectively protecting the contacts of the mechanical switch and extending its service life.

[0026] In one embodiment according to the present application, Figure 2 As shown, a control method for a hybrid solid-state contactor is proposed, comprising: Step S201, receiving an external control signal through a mechanical switch driving circuit.

[0027] Optionally, the external control signal is the initial instruction to trigger the hybrid solid-state contactor to operate, and may come from an external controller (such as a PLC, a single-chip microcomputer or other automation equipment). The external control signal may be a simple level signal (high level or low level) to instruct the hybrid solid-state contactor to perform a closing or opening operation.

[0028] For example, there is a button. When the button is pressed, the button closes and outputs a high-level signal (for example, 5V) as an external control signal, indicating that the hybrid solid-state contactor is required to perform a closing operation; when the button is released, the button is disconnected and outputs a low-level signal (for example, 0V), indicating that the hybrid solid-state contactor is required to perform an opening operation.

[0029] Step S202, controlling the mechanical switch to perform an opening or closing operation according to an external control signal.

[0030] Optionally, the mechanical switch is one of the core components of the hybrid solid-state contactor, responsible for the on-off of the main circuit. According to the state of the external control signal (high level or low level), the mechanical switch performs the corresponding closing or opening operation.

[0031] For example, when the external control signal is at a high level, the electromagnetic coil of the mechanical switch is energized, generating electromagnetic force, causing the main contacts to close and completing the closing operation. When the external control signal is at a low level, the electromagnetic coil of the mechanical switch loses power, the electromagnetic force disappears, and the main contacts are disconnected under the action of the spring, completing the opening operation.

[0032] Step S203, when it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a state signal to the timing chip through the mechanical switch driving circuit.

[0033] Optionally, the auxiliary contact is part of the mechanical switch and is used to feedback the current state of the mechanical switch (closed or open). When the mechanical switch performs an open or close operation, the state of the auxiliary contact changes, and this state change is transmitted to the timing chip through the mechanical switch drive circuit as a feedback signal.

[0034] For example, when closing the circuit: the main contacts of the mechanical switch are energized, the auxiliary contacts are closed, and a high-level signal (such as 5V) is output, which is fed back to the timing chip through the mechanical switch drive circuit. When opening the circuit: the main contacts of the mechanical switch are disconnected, the auxiliary contacts are disconnected, and a low-level signal (such as 0V) is output, which is fed back to the timing chip through the mechanical switch drive circuit.

[0035] Step S204: the input end of the timing chip receives the status signal fed back by the auxiliary contact.

[0036] Optionally, the input end of the timing chip receives a feedback signal from an auxiliary contact, and can start the internal timing control logic according to the state signal fed back by the auxiliary contact.

[0037] Step S205: the first output terminal of the timing chip sends an execution signal to the solid-state switch through the solid-state switch driving circuit according to the state signal, wherein the execution signal includes an on signal or an off signal.

[0038] Optionally, the timing chip sends an execution signal to the solid-state switch through the solid-state switch driving circuit at its first output terminal according to the state signal fed back by the auxiliary contact. The execution signal can be an on signal (to turn on the solid-state switch) or an off signal (to turn off the solid-state switch).

[0039] For example, when closing the switch: after the timing chip detects the high-level signal of the auxiliary contact, after a preset delay (e.g., 10ms), the solid-state switch drive circuit sends a high-level signal to the solid-state switch to turn on the solid-state switch. When opening the switch: after the timing chip detects the low-level signal of the auxiliary contact, after a preset delay (e.g., 20ms), the solid-state switch drive circuit sends a low-level signal to the solid-state switch to turn off the solid-state switch.

[0040] Step S206: the solid-state switch performs an on operation or an off operation according to the execution signal.

[0041] For example, the on operation: after the solid-state switch receives a high-level signal, the internal semiconductor device (such as a transistor or thyristor) is turned on, and the current flows to the load through the solid-state switch. The off operation: after the solid-state switch receives a low-level signal, the internal semiconductor device is turned off and the current is cut off.

[0042] In summary, the control method of the hybrid solid-state contactor provided in the embodiment of the present application receives an external control signal through a mechanical switch driving circuit; controls the mechanical switch to perform an opening or closing operation according to the external control signal; when detecting that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a state signal to the timing chip through the mechanical switch driving circuit; the input end of the timing chip receives the state signal fed back by the auxiliary contact; the first output end of the timing chip sends an execution signal to the solid-state switch through the solid-state switch driving circuit according to the state signal, wherein the execution signal includes a conduction signal or a shutdown signal; the solid-state switch performs a conduction operation or a shutdown operation according to the execution signal, thereby solving the problem of complex structure and inconvenient operation of the hybrid solid-state contactor in the related art. In the present application, the hybrid solid-state contactor is controlled to open and close by the timing chip, thereby achieving the technical effect of small size, simple operation and high reliability of the hybrid solid-state contactor.

[0043] In an optional embodiment, according to the external control signal, controlling the mechanical switch to perform the opening or closing operation includes: when the external control signal is a dry contact input set high, controlling the mechanical switch to perform the closing operation; when the external control signal is a dry contact input set low and the solid-state switch is detected to be in the on state, controlling the mechanical switch to perform the opening operation.

[0044] Optionally, the external control signal can be a dry contact input set high or a dry contact input set low. A dry contact input is a passive electrical interface consisting of a switch or relay contact. It does not directly provide power, but detects its state through an external power supply. The state change of the dry contact input (closed or open) is used to transmit the control signal.

[0045] For example, when the operator presses the start button, the button closes, the dry contact input goes high, and the closing is triggered. When the operator releases the button, the button opens, the dry contact input goes low, and the opening is triggered.

[0046] In summary, dry contact input is a simple, reliable and easy-to-implement external control signal form, especially suitable for hybrid solid-state contactor control in industrial automation and power systems. By setting the dry contact input high or low, the closing or opening operation of the mechanical switch can be easily triggered, ensuring the fast response and high reliability of the system.

[0047] In an optional embodiment, when it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a status signal to the timing chip, including: In the first step, when it is detected that the mechanical switch performs a closing operation, the state of the auxiliary contact changes according to the closing operation of the mechanical switch.

[0048] Optionally, when the mechanical switch performs a closing operation, the electromagnetic coil inside it is energized, the main contacts are closed, and the closing action is completed. Auxiliary contacts are provided on the mechanical switch, and these auxiliary contacts are mechanically linked with the main contacts. When the main contacts are closed, the state of the auxiliary contacts will also change. The state change of the auxiliary contacts is used to feedback the current action state of the mechanical switch.

[0049] For example, if the auxiliary contact is a normally open contact, the auxiliary contact is closed when the circuit breaker is closed, and a high-level signal is output. If the auxiliary contact is a normally closed contact, the auxiliary contact is disconnected when the circuit breaker is closed, and a low-level signal is output.

[0050] In the second step, the mechanical switch driving circuit transmits the first state signal to the timing chip, and the enable signal of the timing chip is set high, wherein the first state signal is a signal generated corresponding to the state change of the auxiliary contact according to the closing of the mechanical switch.

[0051] Optionally, the state change of the auxiliary contact can be captured by the detection mechanical switch drive circuit, and converted into a corresponding level signal (high level or low level), and then transmitted to the timing chip. After the timing chip receives the first state signal fed back by the auxiliary contact, it activates its internal logic function according to the state of the signal (high level or low level). Specifically, the enable signal of the timing chip is set high, indicating that the timing chip starts working.

[0052] For example, the mechanical switch drive circuit converts the closed or open state of the auxiliary contact into a high or low level signal, which is transmitted to the input of the timing chip. When the auxiliary contact is closed and a high level signal is output, the input of the timing chip detects a high level signal, and the timing chip enable signal is set high. After the timing chip enable signal is set high, the timing chip starts to execute subsequent control logic, such as controlling the on or off of the solid-state switch.

[0053] In summary, the state change of the auxiliary contact can provide real-time feedback on the closing state of the mechanical switch, ensuring that the timing chip can accurately start the subsequent control logic.

[0054] In an optional embodiment, when it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a status signal to the timing chip, including: In the first step, when it is detected that the mechanical switch performs an opening operation, the state of the auxiliary contact changes according to the opening of the mechanical switch.

[0055] Optionally, when the mechanical switch performs the opening operation, the electromagnetic coil inside it loses power, and the main contact is disconnected under the action of the spring, so that the opening action can be completed. Auxiliary contacts are provided on the mechanical switch, and these auxiliary contacts are mechanically linked with the main contacts. When the main contact is disconnected, the state of the auxiliary contact will also change accordingly. The state change of the auxiliary contact is used to feedback the current action state of the mechanical switch.

[0056] In the second step, the mechanical switch driving circuit transmits the second state signal to the timing chip, and the enable signal of the timing chip is set low, wherein the second state signal is a signal generated corresponding to the state change of the auxiliary contact according to the opening of the mechanical switch.

[0057] Optionally, the state change of the auxiliary contact is captured by the detection circuit and converted into a corresponding level signal (high level or low level), which is then transmitted to the timing chip. After the timing chip receives the second state signal fed back by the auxiliary contact, it activates its internal logic function according to the state of the signal (high level or low level). Specifically, the enable signal of the timing chip is set low, indicating that the timing chip starts working.

[0058] For example, when the operator releases the button, the dry contact input is set low, and the electromagnetic coil that triggers the mechanical switch loses power. The main contacts of the mechanical switch are disconnected under the action of the spring, completing the opening operation. The auxiliary contacts of the mechanical switch (assuming they are normally open contacts) are also disconnected when the main contacts are disconnected. After the auxiliary contacts are disconnected, a low-level signal (for example, 0V) is output. The detection circuit captures the low-level signal of the auxiliary contact and passes it to the input of the timing chip. After the timing chip receives the low-level signal, the enable signal is set low, indicating that the timing chip starts working. According to the preset logic, the timing chip sends a shutdown signal to the solid-state switch after a fixed delay (for example, 20ms), causing the solid-state switch to turn off.

[0059] In summary, the state change of the auxiliary contact can provide real-time feedback on the opening state of the mechanical switch, ensuring that the timing chip can accurately start the subsequent control logic. This improves the reliability and stability of the system and ensures the coordinated operation of the mechanical switch and the solid-state switch.

[0060] In an optional embodiment, after the solid-state switch performs a shut-off operation according to the execution signal, the method includes: In the first step, the timing chip sets the voltage regulation signal low.

[0061] Optionally, after the solid-state switch completes the shutdown operation according to the execution signal, the timing chip can set the voltage regulation signal low through its output terminal. The voltage regulation signal is a control signal used to instruct the mechanical switch power supply circuit to change the driving voltage of the mechanical switch coil.

[0062] For example, the output end of the timing chip is connected to the mechanical switch through the mechanical switch power supply circuit. After the timing chip determines through internal logic that the solid-state switch has completed the shutdown operation, it switches the voltage regulation signal from a high level to a low level.

[0063] In the second step, the mechanical switch power supply circuit converts the voltage regulation signal into a power conversion signal.

[0064] Optionally, the voltage regulation signal is a logic signal output by the timing chip, usually a simple high-low level signal. This signal itself does not have the ability to directly adjust the power supply, but serves as a control instruction to trigger the action of the power switching circuit.

[0065] The third step is to restore the driving voltage of the mechanical switch to the target value according to the power conversion signal.

[0066] Optionally, the mechanical switch power supply circuit can restore the drive voltage of the mechanical switch to a target value according to the specific content of the power conversion signal (such as voltage level or some coded information). For example, the drive voltage of the mechanical switch coil is switched from a holding voltage (such as 12V) to a rated voltage (such as 24V).

[0067] In an optional embodiment, after the solid-state switch performs a turn-on operation or a turn-off operation according to the execution signal, the method includes: the timing chip outputs a feedback signal.

[0068] Optionally, the feedback signal is used to report the current state (on or off) of the solid-state switch to an external system for further monitoring or control. The timing chip can send a feedback signal through its output after the solid-state switch completes the on or off operation. The feedback signal can be a high level or low level signal, or a pulse signal, depending on the system design.

[0069] In summary, the feedback signal output by the timing chip can report the status of the solid-state switch in real time, ensuring that the external system can accurately monitor the switch operation. This improves the reliability and transparency of the system and facilitates fault detection and maintenance.

[0070] For example, Figure 3 This is a schematic diagram of the closing control process. Closing can be completed through the following steps: Dry contact input set high: external control signal (such as button pressing) closes the dry contact input and outputs a high level signal (such as 5V); Mechanical switch closing: After the timing chip detects that the dry contact input is set high, the electromagnetic coil of the mechanical switch is energized, the main contact is attracted, and the closing operation is completed; The auxiliary contact is disconnected and the timing chip enable is set high: When the mechanical switch is closed, the auxiliary contact (assuming it is a normally closed contact) is disconnected and a low-level signal is output. After the timing chip detects the change in the auxiliary contact state, the enable signal is set high to activate the internal logic; After a fixed delay, the voltage is adjusted high and the holding voltage is reduced to reduce loss: After the enable signal is set high, the timing chip sets the voltage regulation signal high after a preset fixed delay (e.g., 10ms). The mechanical switch power supply circuit reduces the holding voltage of the mechanical switch coil from the rated voltage (e.g., 24V) to the holding voltage (e.g., 12V) according to the change of the voltage regulation signal; Mechanical switch holding voltage reduction: After the mechanical switch power supply circuit completes voltage switching, the holding voltage of the mechanical switch coil is reduced to a preset value (e.g. 12V); After a fixed delay, the thyristor conduction signal is set high: after the holding voltage is reduced, the timing chip again sets the thyristor conduction signal high after a preset fixed delay (e.g., 20ms); Thyristor conduction: After the thyristor receives the conduction signal, the internal semiconductor device is turned on, and the current flows to the load through the thyristor; Dry contact output signal output, feedback of product status: After the thyristor is turned on, the timing chip feeds back the current status through the dry contact output signal (such as a high level signal); Closing is complete.

[0071] For example, Figure 4 This is a schematic diagram of the opening control process. The opening can be completed through the following steps: Dry contact input set low: external control signal (such as button release) disconnects the dry contact input and outputs a low level signal (such as 0V); Detect whether the thyristor is turned on: The timing chip or detection circuit detects whether the thyristor is in the on state through a current sensor or other means; When the thyristor is turned on, the mechanical switch opens: after the timing chip detects that the thyristor is turned on, the electromagnetic coil that triggers the mechanical switch loses power, and the main contact is disconnected under the action of the spring, completing the opening operation; The auxiliary contact is turned on and the delay chip enable is set to low: when the mechanical switch is opened, the auxiliary contact (assuming it is a normally closed contact) is closed and a high-level signal is output. After the timing chip detects the change in the state of the auxiliary contact, the enable signal is set to low; After a fixed delay, the thyristor conduction signal is set low: After the enable signal is set low, the timing chip sets the thyristor conduction signal low after a preset fixed delay (for example, 20ms); Thyristor turn-off: After the thyristor receives the turn-off signal, the internal semiconductor device is turned off and the current is cut off; After a fixed delay, the voltage regulation signal is set low, and the mechanical switch driving voltage is restored: after the thyristor is turned off, the timing chip sets the voltage regulation signal low after a preset fixed delay (e.g. 10ms), and the mechanical switch power supply circuit restores the driving voltage of the mechanical switch coil from the holding voltage (e.g. 12V) to the rated voltage (e.g. 24V) according to the change of the voltage regulation signal; Dry contact output signal output, feedback product status: After the thyristor is turned off, the timing chip feeds back the current status through the dry contact output signal (such as a low-level signal); Opening is completed.

[0072] In summary, by adding a timing chip to the hybrid solid-state contactor to work together, fast closing and opening operations can be achieved. The timing chip can accurately control the on and off of the thyristor, protect the mechanical switch contacts, and extend their service life. And by reducing the holding voltage of the mechanical switch, the coil heating can be reduced and the system efficiency can be improved. Finally, the dry contact output signal reports the current status to the external system for easy monitoring and further control.

[0073] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0074] In one embodiment according to the present application, Figure 5 As shown, a control device 500 for a hybrid solid-state contactor is proposed, and the control device 500 for the hybrid solid-state contactor includes a processor and a memory 504, wherein the memory 504 stores a program or instruction, and when the program or instruction is executed by the processor 502, the steps of the control method for the hybrid solid-state contactor in any of the above technical solutions are implemented. Therefore, the control device 500 for the hybrid solid-state contactor has all the beneficial effects of the control method for the hybrid solid-state contactor in any of the above technical solutions, which will not be repeated here.

[0075] In one embodiment of the present application, a readable storage medium is provided, on which a program is stored. When the program is executed by a processor, the control method of the hybrid solid-state contactor in any of the above embodiments is implemented, thereby having all the beneficial technical effects of the control method of the hybrid solid-state contactor in any of the above embodiments.

[0076] The readable storage medium includes a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0077] It should be clear that in the claims, specification and drawings of the present invention, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, which is only for the purpose of more conveniently describing the present invention and making the description process more convenient, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limiting the present invention; the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances of the above data.

[0078] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hybrid solid-state contactor, characterized in that: include: A mechanical switch, wherein the mechanical switch is provided with an auxiliary contact; Solid-state switches; Mechanical switch power supply circuit; Mechanical switch drive circuit; Solid-state switch drive circuit; A timing chip, wherein the input end of the timing chip is connected to the auxiliary contact of the mechanical switch through the mechanical switch driving circuit, the first output end of the timing chip is connected to the solid-state switch through the solid-state switch driving circuit, and the second output end of the timing chip is connected to the mechanical switch through the mechanical switch power supply circuit.

2. The hybrid solid-state contactor according to claim 1, characterized in that: The solid-state switch includes at least a pair of semiconductor devices connected in reverse series.

3. A control method for a hybrid solid-state contactor, applied to the hybrid solid-state contactor as claimed in claim 1, characterized in that: The method comprises: receiving an external control signal through the mechanical switch driving circuit; According to the external control signal, controlling the mechanical switch to perform an opening or closing operation; When it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a state signal to the timing chip through the mechanical switch drive circuit; The input end of the timing chip receives the state signal fed back by the auxiliary contact; The first output terminal of the timing chip sends an execution signal to the solid-state switch through the solid-state switch driving circuit according to the state signal, wherein the execution signal includes an on signal or an off signal; The solid-state switch performs an on operation or an off operation according to the execution signal.

4. The control method of the hybrid solid-state contactor according to claim 3, characterized in that: According to the external control signal, controlling the mechanical switch to perform an opening or closing operation includes: When the external control signal is a dry contact input set high, controlling the mechanical switch to perform a closing operation; When the external control signal is a dry contact input low and it is detected that the solid-state switch is in the on state, the mechanical switch is controlled to perform an opening operation.

5. The control method of the hybrid solid-state contactor according to claim 4, characterized in that: When it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a status signal to the timing chip, including: When it is detected that the mechanical switch performs a closing operation, the auxiliary contact state changes according to the closing operation of the mechanical switch; The mechanical switch driving circuit transmits a first state signal to the timing chip, and the enable signal of the timing chip is set high, wherein the first state signal is a signal generated corresponding to the state change of the auxiliary contact according to the closing of the mechanical switch.

6. The control method of the hybrid solid-state contactor according to claim 4, characterized in that: When it is detected that the mechanical switch performs an opening or closing operation, the auxiliary contact feeds back a state signal to the timing chip through the mechanical switch driving circuit, including: When it is detected that the mechanical switch performs an opening operation, the auxiliary contact state changes according to the opening operation performed by the mechanical switch; The mechanical switch driving circuit transmits the second state signal to the timing chip, and the enable signal of the timing chip is set low, wherein the second state signal is a signal generated corresponding to the state change of the auxiliary contact according to the opening of the mechanical switch.

7. The control method of the hybrid solid-state contactor according to claim 6, characterized in that: After the solid-state switch performs a shut-off operation according to the execution signal, the method includes: The timing chip sets the voltage regulation signal to low; The mechanical switch power supply circuit converts the voltage regulation signal into a power conversion signal; The driving voltage of the mechanical switch is restored to a target value according to the power conversion signal.

8. The control method of the hybrid solid-state contactor according to claim 3, characterized in that: After the solid-state switch performs a turn-on operation or a turn-off operation according to the execution signal, the method includes: the timing chip outputting a feedback signal.

9. A control device for a hybrid solid-state contactor, characterized in that: include: processor; A memory, wherein a program or instruction is stored in the memory, and when the processor executes the program or instruction in the memory, the processor implements the steps of the control method of the hybrid solid-state contactor according to any one of claims 3 to 8.

10. A readable storage medium, characterized in that: The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by the processor, the steps of the control method of the hybrid solid-state contactor according to any one of claims 3 to 8 are implemented.

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