Control circuit and switching device for dual-power change-over switch

Abstract

The embodiment of the utility model provides a control circuit for a dual-power change-over switch and a switching device. The control circuit comprises a sampling circuit which comprises an input port and an output port coupled to the dual power supply and is used for outputting an output voltage signal sampled from the dual power supply; the controller is coupled to the output port of the sampling circuit and the load so as to generate a control signal according to the output voltage signal and an identification signal of the load; and the driving circuit comprises a power supply input port coupled to the dual power supply, a signal input port coupled to the controller and a power output port coupled to the load, and is used for adjusting the voltage output to the load from the power output port according to the control signal so as to adapt to the voltage demand change of the load. Therefore, the control device can be uniformly used for the dual-power change-over switch so as to be suitable for loads of different specifications, and meanwhile, the switch device has the advantages of high compatibility, low cost and small size.

Description

Technical Field

[0001] Example embodiments of the present disclosure generally relate to the field of switch devices, and more particularly to a control circuit for a dual power conversion switch and a switch device. Background Art

[0002] Automatic transfer switching equipment (ATSE) is used to automatically switch to the backup power supply when the main power fails or is unstable to ensure the continuity and stability of power supply. ATSE can operate at different rated voltages to achieve flexible power switching, thus adapting to various practical application requirements.

[0003] However, traditional ATSE has great limitations in adaptability and can usually only adapt to one type of load. This single adaptability will result in the need to develop multiple different ATSE devices when facing different voltage levels or load specifications, which not only increases costs but also leads to complexity in inventory management. Utility Model Content

[0004] An object of the present disclosure is to provide a control circuit for a dual power conversion switch and a switch device, so as to at least partially solve the above-mentioned problems and / or other potential problems existing in traditional switch devices.

[0005] In a first aspect of the present disclosure, a control circuit for a dual power conversion switch is provided. The control circuit includes: a sampling circuit, including an input port and an output port coupled to a dual power supply, for outputting an output voltage signal sampled from the dual power supply; a controller, coupled to the output port of the sampling circuit and a load, for generating a control signal according to the output voltage signal and an identification signal of the load; and a driving circuit, including a power input port coupled to the dual power supply, a signal input port coupled to the controller, and a power output port coupled to the load, for adjusting the voltage output from the power output port to the load according to the control signal to adapt to changes in the voltage demand of the load.

[0006] In an embodiment according to the present disclosure, when one or more of the dual power supplies undergo voltage changes, the sampling circuit records these changes and converts them into voltage signals for transmission to the controller. The controller calculates and generates a corresponding control signal based on the sampled voltage signal and the received load identification signal. The control signal is then transmitted to the drive circuit, which adjusts the voltage of its output port according to the control signal to match the load requirements. In this way, the control circuit can adapt to different voltage levels and is no longer restricted to loads of a single specification. This not only improves the flexibility and compatibility of the switching device, but also brings greater convenience and economy to the user, effectively reduces the maintenance and management costs of the switching device, and increases the service life of the switching device. Other benefits will be described below in conjunction with the corresponding embodiments.

[0007] In some embodiments, the driving circuit includes: a signal processing circuit coupled to a controller via a signal input port to generate a gate current according to a control signal; and a power control circuit coupled to the signal processing circuit to adjust the voltage provided by the dual power supply to the load according to the gate current.

[0008] In some embodiments, the signal processing circuit includes: a light emitting diode, an anode of the light emitting diode coupled to a power input port of a dual power supply, and a cathode coupled to a signal input port of a controller; and a photosensitive bidirectional thyristor, a first terminal of the photosensitive bidirectional thyristor coupled to the power input port, and a second terminal coupled to a power control circuit, and the photosensitive bidirectional thyristor is turned on when receiving a light signal generated by the light emitting diode.

[0009] In some embodiments, the power control circuit includes a triac having a third terminal coupled to a first terminal of a phototriac, a fourth terminal coupled to a load, and a gate coupled to a second terminal of the phototriac.

[0010] In some embodiments, the control circuit further includes: a first current limiting resistor arranged between the third terminal of the triac and the first terminal of the photosensitive bidirectional thyristor.

[0011] In some embodiments, the power control circuit further includes: a resistor-capacitor circuit coupled between the third terminal and the fourth terminal of the triac and including a filter resistor and a capacitor connected in series.

[0012] In some embodiments, the power control circuit further includes: a varistor arranged in parallel with the resistor-capacitor circuit.

[0013] In some embodiments, the control circuit further includes: a control transistor, wherein the base of the control transistor is coupled to the controller, the collector is coupled to the signal input port of the driving circuit, and the emitter is grounded.

[0014] In some embodiments, the control circuit further includes: a second current limiting resistor coupled between the dual power supply and the anode of the light emitting diode.

[0015] In a second aspect of the present disclosure, a switch device is provided, comprising: a control circuit according to the first aspect; and a load coupled to the control circuit.

[0016] It should be understood that the contents described in this content section are not intended to limit the key features or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0018] Figure 1 A schematic diagram showing a control circuit of a switch device according to some embodiments of the present disclosure is shown;

[0019] Figure 2 A schematic diagram showing a driving circuit according to some embodiments of the present disclosure; and

[0020] Figure 3 A simulation diagram of a control circuit according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0021] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0022] In the description of the embodiments of the present disclosure, the term "including" and similar terms should be understood as open inclusion, that is, "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions may be included below. The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may be included below.

[0023] As briefly mentioned above, conventional automatic transfer switching equipment (ATSE) can usually only adapt to a load with a fixed voltage specification. The conventional solution is to generate a control signal through a microcontroller chip to switch the contacts of the relay, thereby connecting a power resistor in series to the circuit to achieve voltage limitation. For example, when used under rated 380V / 415V and other voltage conditions, the control of the microcontroller chip ensures that the relay can switch at the appropriate time, thereby connecting a power resistor in series to the circuit to achieve voltage limitation. However, this conventional solution has the following defects.

[0024] First, the cost is high. Different specifications of power resistors need to be configured under different voltage requirements, which further increases the equipment cost.

[0025] Secondly, the adaptability is single. Although a certain degree of voltage regulation can be achieved through the combination of control chips and relays, this method relies on a fixed resistance value. For a wider voltage range or complex load types, its adaptability is limited and it cannot flexibly respond to diverse voltage demand scenarios.

[0026] Finally, it takes up a lot of space. In order to achieve voltage limiting, the ATSE needs to accommodate multiple relays and high-power resistors, which makes the entire ATSE physically large. For space-constrained application scenarios (such as portable devices or compact control cabinets), traditional ATSE is not suitable.

[0027] In order to solve or at least partially solve the above-mentioned problems or other potential problems of the switch device of the traditional solution, an embodiment of the present disclosure provides a control circuit and a switch device solution for a dual power conversion switch. In the control circuit, the sampling circuit includes an input port and an output port. The input port is coupled to the dual power supply. The sampling circuit is used to output the output voltage signal obtained by sampling the dual power supply. The controller is coupled to the output port of the sampling circuit and the load to generate a corresponding control signal according to the sampled output voltage signal and the identification signal of the load. The drive circuit includes a power input port coupled to the dual power supply, a signal input port coupled to the controller, and a power output port coupled to the load. The drive circuit adjusts the output voltage of its power output port according to the control signal received from the controller, so as to adapt to the change of the load voltage demand. In this way, the control circuit can accurately adjust the voltage output to the load to ensure that the load can operate normally and safely under different power supply conditions.

[0028] The following will be combined Figures 1 to 3 The switch device 100 is described as an example structure. The switch device 100 according to an embodiment of the present disclosure may include a load 140 such as a coil and an actuator, and a control circuit. The load 140 is coupled to the control circuit.

[0029] Specifically, the coil of the load 140 is coupled to the control circuit as a part of power conversion. The actuator is coupled between the coil and the control circuit to perform a switching action.

[0030] Furthermore, the coil may include an electromagnetic coil or an induction coil. The coil may convert an electrical signal into mechanical motion through magnetic induction or inductance effect, thereby generating corresponding actions to realize the opening and closing of the circuit. Therefore, the coil is mainly used to provide a driving force so that the conversion switch can switch smoothly between different power input ports 1011.

[0031] The actuator can include mechanical devices that convert the mechanical movement generated by the coil into the actual switch action. Specifically, the actuator includes electromechanical components, such as levers, springs, and mechanical connectors, which work together to ensure that the switch can switch quickly and accurately when it receives a signal.

[0032] The following will be combined Figure 1 and Figure 2 To describe the control circuit. Figure 1 As shown, the control circuit for a dual power source 101 conversion switch such as a main power source 102 and a backup power source 103 according to an embodiment of the present disclosure generally includes a sampling circuit 110 , a controller 120 and a driving circuit 130 .

[0033] Specifically, the input port of the sampling circuit 110 is coupled to the dual power supply 101, and the output port of the sampling circuit 110 is coupled to the controller 120. The sampling circuit 110 is used to collect the output voltage signal of the power supply in real time. Therefore, the sampling circuit 110 can be used to ensure that the controller 120 can obtain accurate information about the current power supply state, thereby providing data support for subsequent processing of the control circuit.

[0034] Further, the controller 120 is connected to the output port of the sampling circuit 110 and the load 140. The controller 120 can generate a control signal according to the power supply output voltage signal provided by the sampling circuit 110 and the identification signal 141 of the load 140. In other words, the control signal can be adjusted according to the real-time state of the power supply and the specific needs of the load 140, so as to achieve control of the power supply. For example, the identification signal 141 of the load 140 may include an identification signal of the coil and an identification signal of the actuator. The identification signal 141 may include a rated voltage signal of the coil and a rated voltage signal of the actuator.

[0035] Furthermore, the drive circuit 130 includes a power input port 1011, a signal input port, and a power output port. Specifically, the power input port 1011 is coupled to the dual power supply 101. The signal input port is coupled to the controller 120. The power output port is coupled to the load 140. According to the control signal from the controller 120, the drive circuit 130 adjusts the output voltage of the power output port to ensure that the power received by the load 140 can meet its changing voltage requirements. Therefore, the entire control circuit can meet the requirements of the load 140 and ensure the stability and adaptability of the power supply.

[0036] The following will be combined Figure 2 To describe the specific circuit structure of the control circuit. Figure 2As shown, the driving circuit 130 is used to accurately adjust the voltage provided by the dual power supply 101 to the load 140 according to the control signal to meet the actual needs of the load 140. It can be understood that the main power supply 102 and the backup power supply 103 of the dual power supply 101 can have the same specifications or different specifications. In some embodiments, the driving circuit 130 includes a signal processing circuit 131 and a power control circuit 132.

[0037] Specifically, the signal input port of the signal processing circuit 131 is coupled to the controller 120. The signal processing circuit 131 receives the control signal sent by the controller 120 and generates a corresponding gate current based on the control signal. In this process, the signal processing circuit 131 plays a role in signal conversion, converting the control signal into a specific current signal, providing a basis for further operation of the power control circuit 132.

[0038] Furthermore, the power control circuit 132 is coupled to the signal processing circuit 131. By receiving the gate current from the signal processing circuit 131, the power control circuit 132 performs adjustment on the output voltage of the dual power supply 101. Specifically, the power control circuit 132 controls the voltage supply of the dual power supply 101 to the load 140 according to the magnitude of the gate current to ensure that the output voltage accurately meets the changes required by the load 140. Therefore, when the power supply or the load 140 changes, the control circuit can respond quickly and ensure the continuity and stability of the power supply.

[0039] In some embodiments, the signal processing circuit (also called a thyristor driver) 131 includes a light emitting diode 1311 and a photosensitive bidirectional thyristor 1312, which is used to realize the conversion of electrical signals to optical signals and then to electrical signals, ensuring the accuracy of signal control and the stability of the device.

[0040] Furthermore, the anode of the LED 1311 is coupled to the power input port 1011 of the dual power supply 101, and the cathode is connected to the signal input port of the controller 120. When the controller 120 sends a control signal, the control signal is converted into an optical signal through the LED 1311.

[0041] Furthermore, the first terminal of the photosensitive bidirectional thyristor 1312 is connected to the power input port 1011, and the second terminal is coupled to the power control circuit 132. The photosensitive bidirectional thyristor 1312 can sense the optical signal from the light-emitting diode 1311 and turn on when receiving the optical signal. This process realizes the re-conversion of the optical signal emitted by the light-emitting diode 1311 into an electrical signal. In other words, this method of controlling the current by light, that is, controlling the conduction state of the photosensitive bidirectional thyristor 1312 by using the optical signal, can accurately control the power control circuit 132, thereby realizing accurate regulation of the power supply output voltage. The optical coupling effect between the light-emitting diode 1311 and the photosensitive bidirectional thyristor 1312 can electrically isolate the control signal from the main circuit, providing better safety and anti-interference capabilities.

[0042] In some embodiments, the power control circuit (also referred to as a power triac) 132 includes a triac 1321, which is used to achieve precise control of voltage and current, thereby ensuring the reliability and stability of power supply. The triac 1321 of the power control circuit 132 cooperates with the photosensitive bidirectional thyristor 1312 to adjust the voltage provided to the load 140.

[0043] Furthermore, the triac 1321 includes a third terminal, a fourth terminal, and a gate. The third terminal is coupled to the first terminal of the photosensitive bidirectional thyristor 1312, so as to ensure that the triac 1321 can receive the electrical signal from the photosensitive bidirectional thyristor 1312 and realize the timely conduction of the circuit. The fourth terminal is directly connected to the load 140, so as to ensure that the power can be transmitted to the load 140. The gate of the triac 1321 is coupled to the second terminal of the photosensitive bidirectional thyristor 1312, so that the power control circuit 132 can timely adjust the conduction state of the triac 1321 according to the optical signal converted by the photosensitive bidirectional thyristor 1312, so as to accurately control the voltage and current received by the load 140.

[0044] In some embodiments, the power control circuit 132 further includes a resistor-capacitor circuit 1324. The resistor-capacitor circuit 1324 is connected in series with a filter resistor 1322 and a capacitor 1323, and the resistor-capacitor circuit 1324 is coupled between the third terminal and the fourth terminal of the triac 1321 to absorb the transient voltage generated when the power control circuit 132 is turned off, so as to prevent false triggering and circuit damage.

[0045] In some embodiments, the power control circuit 132 further includes a varistor 1325. The varistor 1325 is configured in parallel on the bypass of the resistor-capacitor circuit 1324. By connecting the varistor 1325 in parallel, the power control circuit 132 can enhance the stability against sudden voltage changes, ensuring the long-term reliability and safe operation of the entire circuit. In addition, the varistor 1325 can be used to absorb overvoltage spikes that may occur in the control circuit, thereby protecting other components in the circuit from potential damage by high voltage.

[0046] In some embodiments, the control circuit further includes a first current limiting resistor 133. The first current limiting resistor 133 is arranged between the third terminal of the triac 1321 and the first terminal of the photosensitive bidirectional thyristor 1312 to prevent excessive current from damaging the circuit.

[0047] In some embodiments, the control circuit further includes a control transistor 134. The base of the control transistor 134 is coupled to the controller 120 and receives a control signal from the controller 120. The collector of the control transistor 134 is connected to the signal input port of the drive circuit 130, and the emitter is connected to the ground line, i.e., grounded.

[0048] Furthermore, the control transistor 134 can be used as an electronic switch, and its switch is controlled by the control signal output by the controller 120. When the controller 120 provides an appropriate current to the base of the control transistor 134, the control transistor 134 becomes conductive, allowing current to flow from the collector to the emitter. Therefore, the control transistor 134 can control the activation and deactivation of the drive circuit 130, and further control the load 140 connected to the drive circuit 130.

[0049] In some embodiments, the control circuit further includes a second current limiting resistor 135. The second current limiting resistor 135 is coupled between the dual power supply 101 and the anode of the light emitting diode 1311. The current limiting resistor is used to limit the current flowing to the light emitting diode 1311, protect the light emitting diode 1311 from being damaged by excessive current, and ensure that the light emitting diode 1311 emits light stably with the correct brightness.

[0050] like Figure 3 As shown, through simulation experiments, it can be concluded that the input voltage curve 150 of the dual power supply 101 is processed by the control signal 170 generated by the controller 120 of the control circuit to obtain the voltage curve 160 of the load 140. It can be concluded that the control circuit in the embodiment of the present application can realize full-wave rectification. In other words, the control circuit can realize control within the entire cycle of the voltage curve 160 through the control signal 170. At the same time, the control circuit can adapt to different voltage levels and is no longer restricted to a single specification of the load 140. This not only improves the flexibility and compatibility of the switching device.

[0051] The above descriptions of various implementations of the present disclosure are exemplary, non-exhaustive, and not limited to the disclosed implementations. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described implementations. The selection of terms used herein is intended to best explain the principles of the implementations, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the various implementations disclosed herein.

Claims

1. A control circuit for a dual power conversion switch, characterized in that: include: A sampling circuit (110), comprising an input port and an output port coupled to the dual power supply, for outputting an output voltage signal sampled from the dual power supply; A controller (120) coupled to the output port of the sampling circuit (110) and a load (140) to generate a control signal according to the output voltage signal and an identification signal (141) of the load (140); as well as The drive circuit (130) comprises a power input port (1011) coupled to the dual power supply, a signal input port coupled to the controller (120), and a power output port coupled to the load (140), so as to adjust the voltage outputted from the power output port to the load (140) according to the control signal to adapt to the change of the voltage demand of the load (140).

2. The control circuit according to claim 1, characterized in that: The driving circuit (130) comprises: A signal processing circuit (131) coupled to the controller (120) via the signal input port to generate a gate current according to the control signal; and A power control circuit (132) is coupled to the signal processing circuit (131) to adjust the voltage provided by the dual power supply to the load (140) according to the gate current.

3. The control circuit according to claim 2, characterized in that: The signal processing circuit (131) comprises: a light emitting diode (1311), wherein an anode of the light emitting diode (1311) is coupled to a power input port (1011) of the dual power supply, and a cathode of the light emitting diode (1311) is coupled to a signal input port of the controller (120); and A photosensitive bidirectional thyristor (1312), wherein a first terminal of the photosensitive bidirectional thyristor (1312) is coupled to a power input port (1011), and a second terminal is coupled to the power control circuit (132), and the photosensitive bidirectional thyristor (1312) is turned on when receiving a light signal generated by the light emitting diode (1311).

4. The control circuit according to claim 3, characterized in that: The power control circuit (132) comprises: A triac (1321), wherein the third terminal of the triac (1321) is coupled to the first terminal of the photosensitive bidirectional thyristor (1312), the fourth terminal is coupled to the load (140), and the gate is coupled to the second terminal of the photosensitive bidirectional thyristor (1312).

5. The control circuit according to claim 4, characterized in that: Also includes: A first current limiting resistor (133) is arranged between the third terminal of the triac (1321) and the first terminal of the photosensitive bidirectional thyristor (1312).

6. The control circuit according to claim 4 or 5, characterized in that: The power control circuit (132) further includes: The resistor-capacitor circuit (1324) is coupled between the third terminal and the fourth terminal of the triac (1321), and includes a filter resistor (1322) and a capacitor (1323) connected in series.

7. The control circuit according to claim 6, characterized in that: The power control circuit (132) further includes: The varistor (1325) is arranged in parallel with the resistor-capacitor circuit (1324).

8. The control circuit according to claim 6, characterized in that: Also includes: A control transistor (134), wherein the base of the control transistor (134) is coupled to the controller (120), the collector is coupled to the signal input port of the drive circuit (130), and the emitter is grounded.

9. The control circuit according to claim 6, characterized in that: Also includes: A second current limiting resistor (135) is coupled between the dual power supply and the anode of the light emitting diode (1311).

10. A switch device, characterized in that: include: A control circuit according to any one of claims 1 to 9; A load (140) is coupled to the control circuit.

Images