Uninterruptible power supply circuit

Abstract

The uninterrupted power supply circuit provided by the embodiment of the present application comprises: a power module, which is powered by an external alternating power supply and outputs a power DC voltage; a capacitor, which is electrically connected with the power module and stores electric energy when the external alternating power supply normally supplies power; a plurality of voltage conversion modules, input ends of the plurality of voltage conversion modules are electrically connected with the power module and the capacitor, output ends of the plurality of voltage conversion modules are connected with a load device, and the plurality of voltage conversion modules are used for converting the power DC voltage into at least one output current voltage for powering the load device; a control module, a first input end of the control module is connected with the output ends of the plurality of voltage conversion modules, and an output end of the control module is connected with the load device; and an external power supply detection unit, which is connected with a second input end of the control module and is used for detecting a power supply state of the external alternating power supply, thereby improving the safety and reliability of the entire uninterrupted power supply circuit.

Description

Technical Field

[0001] This application relates to the field of circuit technology, and more particularly to uninterruptible power supply circuits. Background Technology

[0002] In fields such as industrial automation and data processing, where strict power continuity is required, uninterruptible power supplies (UPS) are typically used to ensure the stable operation of critical load devices such as controllers. The basic working principle of existing UPS circuits is to supply power to the load devices and charge internal energy storage components (such as capacitors or batteries) when the external AC power supply is normal. When the external AC power supply is unexpectedly interrupted, the energy storage components seamlessly switch over, continuously providing power to the load devices to achieve power outage buffering and prevent abnormal shutdown due to momentary power failure. However, existing UPS circuits only passively maintain power supply. This means that although the load devices continue to operate after an external power outage, they cannot sense the actual external power status and therefore cannot trigger preset safety shutdown procedures such as data saving and device reset. This significantly reduces the value of power outage buffering and may lead to data loss or equipment malfunction, resulting in a relatively low level of security for existing UPS circuits. Utility Model Content

[0003] This utility model provides an uninterruptible power supply circuit that can improve the safety of the uninterruptible power supply circuit.

[0004] To achieve the above objectives, a first aspect of this application provides an uninterruptible power supply circuit, comprising: The power module is powered by an external AC power source and outputs a DC voltage. A capacitor is electrically connected to the power module, and the capacitor stores electrical energy when the external AC power supply is working normally. A multi-channel voltage conversion module, wherein the input terminals of the multi-channel voltage conversion module are all electrically connected to the power supply module and the capacitor, and the output terminal of the multi-channel voltage conversion module is connected to the load device. The multi-channel voltage conversion module is used to convert the DC voltage of the power supply into at least one output current voltage to power the load device. The control module has a first input terminal connected to the output terminal of the multi-channel voltage conversion module, and the output terminal of the control module is connected to the load device. An external power supply detection unit is connected to the second input terminal of the control module, and the external power supply detection unit is used to detect the power supply status of the external AC power supply. When the power supply status indicates that the external AC power supply is disconnected, the capacitor output capacitor power supply voltage continues to supply power to the load device through the multiplex voltage conversion module, and the output terminal of the control module outputs an alarm signal to the load device.

[0005] In some embodiments, the multiplex voltage conversion module includes at least two voltage conversion branches; The input terminal of each voltage conversion branch is electrically connected to the power supply module and the capacitor, and the output terminal of at least one voltage conversion branch is connected to the load device.

[0006] In some embodiments, the voltage transformation branch includes a first voltage transformation branch and a second voltage transformation branch; The first voltage conversion branch includes a boost circuit connected in series and a first output port, wherein the boost circuit is electrically connected to the power module and the capacitor; The second voltage conversion branch includes a series-connected step-down circuit and a second output port, both of which are electrically connected to the power module and the capacitor; The first output port and / or the second output port are connected to the load device.

[0007] In some embodiments, the uninterruptible power supply circuit further includes a level selection unit connected in series between the output terminals of all the voltage conversion branches and the first input terminal of the control module.

[0008] In some embodiments, the level selection mechanism is one of a DIP switch, a jumper cap, or a push-button switch.

[0009] In some embodiments, the control module further includes a power input terminal, and when the power supply status indicates that the external AC power supply is normal, the output terminal of the control module outputs a high-level signal to the load device; When the power supply status indicates that the external AC power supply is disconnected, the alarm signal output by the output terminal of the control module is a low-level signal.

[0010] In some embodiments, when the power supply status indicates that the external AC power supply is disconnected, the alarm signal output by the output terminal of the control module is the level signal output by the voltage conversion branch selected by the level selection unit.

[0011] In some embodiments, the uninterruptible power supply return circuit is further provided with a discharge circuit, one end of which is connected to the capacitor and the other end of which is grounded.

[0012] In some embodiments, the discharge circuit includes a discharge resistor and an electronic switch connected in series, the electronic switch being connected to the control unit.

[0013] In some embodiments, the uninterruptible power supply circuit further includes a display unit connected to the control unit, the display unit being used to display at least one of the power supply status, the charging status of the capacitor, and an alarm signal.

[0014] The embodiments of this utility model include at least the following beneficial effects: The uninterruptible power supply (UPS) circuit proposed in this application includes: a power module powered by an external AC power source and outputting a DC voltage; a capacitor electrically connected to the power module, which stores energy when the external AC power source is operating normally; a multi-channel voltage conversion module, whose input terminals are electrically connected to the power module and the capacitor, and whose output terminal is connected to the load device, converting the DC voltage into at least one output current voltage to power the load device; a control module, whose first input terminal is connected to the output terminal of the multi-channel voltage conversion module, and whose output terminal is connected to the load device; and an external power supply detection unit connected to the second input terminal of the control module, used to detect the power supply status of the external AC power source. When the power supply status indicates that the external AC power source is disconnected, the capacitor outputs its power supply voltage to continuously power the load device through the multi-channel voltage conversion module, and the control module outputs an alarm signal to the load device. Based on this, in this application embodiment, by setting an external power supply detection unit and a control module, this UPS circuit achieves intelligent sensing and active communication of the power supply status. When the external AC power supply is interrupted, the external power detection unit can immediately capture this status and notify the control module. The control module then executes two key actions: firstly, it instructs the energy storage capacitor to seamlessly take over the power supply through the multi-channel voltage conversion module, providing the necessary power-down buffer time for the load device; secondly, it outputs a clear alarm signal to the load device. This alarm signal enables the load device to switch from passively receiving power to actively sensing it, thereby immediately initiating a preset safety shutdown procedure, such as saving data and resetting the actuator. This application combines power-down buffering with active status notification, fundamentally solving the problem that traditional uninterruptible power supply circuits cannot effectively link with load devices, greatly improving the safety and reliability of the entire uninterruptible power supply circuit.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the uninterruptible power supply circuit provided in the embodiments of this application.

[0017] Figure 2 This is a circuit diagram of an uninterruptible power supply circuit provided in another embodiment of this application. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0019] It should be understood that in the description of the embodiments of this utility model, "a few" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first," "second," etc., are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0020] In the description of the embodiments of this utility model, unless otherwise explicitly limited, terms such as setting, installation, and electrical connection should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of this utility model in conjunction with the specific content of the technical solution.

[0021] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] In fields such as industrial automation and data processing, where strict power continuity is required, uninterruptible power supplies (UPS) are typically used to ensure the stable operation of critical load devices such as controllers. The basic working principle of existing UPS circuits is to supply power to the load devices and charge internal energy storage components (such as capacitors or batteries) when the external AC power supply is normal. When the external AC power supply is unexpectedly interrupted, the energy storage components seamlessly switch over, continuously providing power to the load devices to achieve power outage buffering and prevent abnormal shutdown due to momentary power failure. However, existing UPS circuits only passively maintain power supply. This means that although the load devices continue to operate after an external power outage, they cannot sense the actual external power status and therefore cannot trigger preset safety shutdown procedures such as data saving and device reset. This significantly reduces the value of power outage buffering and may lead to data loss or equipment malfunction, resulting in a relatively low level of security for existing UPS circuits.

[0023] In this embodiment, by setting an external power supply detection unit and a control module, the uninterruptible power supply circuit achieves intelligent sensing and active communication of power status. When the external AC power is interrupted, the external power supply detection unit can immediately capture this status and notify the control module. The control module then executes two key actions: firstly, it instructs the energy storage capacitor to seamlessly take over the power supply through a multi-channel voltage conversion module, providing the necessary power-off buffer time for the load device; secondly, it outputs a clear alarm signal to the load device. This alarm signal enables the load device to switch from passively receiving power to actively sensing it, thereby immediately initiating a preset safety shutdown procedure, such as saving data and resetting the actuator. This application combines power-off buffering with active status notification, fundamentally solving the problem that traditional uninterruptible power supply circuits cannot effectively link with load devices, greatly improving the safety and reliability of the entire uninterruptible power supply circuit.

[0024] This application provides an uninterruptible power supply circuit, which is specifically described through the following embodiments.

[0025] To better describe the uninterruptible power supply circuit provided in the embodiments of this application, in this embodiment, reference is made to... Figure 1 The diagram shown is a structural schematic of an uninterruptible power supply circuit provided in an embodiment of this application. Figure 1As shown, the core technical concept of the uninterruptible power supply (UPS) circuit of this application is illustrated. It revolves around a control module that acts as the system's brain. When normally powered by an external power source, the power module's output energy is divided into two paths: one provides a stable operating voltage to the load device through a multi-channel voltage conversion module; the other charges the energy storage capacitor. Additionally, an external power detection unit monitors the external power source in real time. When the external power detection unit detects a power failure, it immediately reports this status information to the control module. The control module then performs two tasks: firstly, it controls the charged capacitor to seamlessly take over, continuously supplying power to the load device through the multi-channel voltage conversion module, achieving uninterrupted power loss buffering; secondly, it proactively sends an alarm signal to the load device through a specific signal path, indicating that the load device is now in capacitor-powered mode. This design, combining "continuous power supply" and "proactive notification," enables the load device to be aware of the power outage status in real time and activate emergency plans, thereby fundamentally improving the system's operational safety. Furthermore, Figure 1 The diagram also shows a discharge circuit that can safely release capacitor energy under the command of the control module, further enhancing the safety of maintenance and operation.

[0026] based on Figure 1 The diagram shows the structure of an uninterruptible power supply circuit. The uninterruptible power supply circuit provided in the embodiments of this application will be further described below. (Refer to...) Figure 2 This is a circuit diagram of the uninterruptible power supply circuit provided in an embodiment of this application. Figure 2 As shown, the uninterruptible power supply circuit includes a power module, capacitors, a multiplex voltage conversion module, a control module, a bleeder circuit, and current detection, as well as components not in... Figure 2 The external power supply detection unit and load device are shown in the figure.

[0027] In some embodiments, the power module in the uninterruptible power supply circuit, such as Figure 2 The AC-DC converter in the diagram is shown. This power module serves as the energy input stage of the circuit, with its input terminals connected to an external AC power source (such as the live wire L, neutral wire N, and ground wire PE of the mains). Its function is to convert the unstable external AC power into a stable DC power supply voltage, which provides the basic operating power for subsequent units within the circuit.

[0028] In addition, a current detection module is installed at the output end of the power module of the uninterruptible power supply circuit to detect the current and voltage values ​​of the DC voltage output by the power module.

[0029] In some embodiments, the capacitor in the uninterruptible power supply circuit is electrically connected to the output terminal of the power module and serves as an energy storage element for uninterrupted power supply. This capacitor is the core of the circuit's energy storage; preferably, it can be used as... Figure 2The supercapacitor bank shown consists of one or more supercapacitors. Compared to traditional batteries, supercapacitors have advantages such as fast charging speed, long cycle life, and high power density. When the external AC power supply is normal, the DC voltage output by the power module charges the capacitor, storing electrical energy in the form of an electric field. When the external AC power supply is disconnected, the capacitor can output the stored energy to maintain the operation of the circuit and provide power to subsequent units, thereby maintaining the normal operation of the circuit.

[0030] In some embodiments, the input terminal of the multi-channel voltage conversion module in the uninterruptible power supply circuit is uniformly connected to the power bus composed of the power module and capacitor, while its output terminal is connected to the external load device.

[0031] This multi-channel voltage conversion module may include at least two voltage conversion branches in its specific structure. Here, a voltage conversion branch can be understood as an independent circuit path used to achieve a specific voltage conversion function. For example... Figure 2 As shown, the boost circuit and the buck circuit constitute two parallel voltage conversion branches. According to this structure, the input terminal of each voltage conversion branch is electrically connected to the internal power bus formed by the power module and capacitors to ensure they receive the same input voltage source. Simultaneously, the output terminal of at least one voltage conversion branch is connected to an external load device, thereby stably providing the converted voltage to the load device.

[0032] In some embodiments, to achieve flexible voltage output capability, the voltage conversion branch may specifically include a first voltage conversion branch and a second voltage conversion branch. The first voltage conversion branch internally includes a boost circuit connected in series and a first output port, i.e., as shown below. Figure 2 The boost circuit and the first output port (OUT1) are shown in the diagram. The boost circuit is a DC-DC converter that increases its input voltage before outputting it. Its input is electrically connected to the power module and capacitors, converting the mains DC voltage into a higher voltage value for output from the first output port. Correspondingly, the second voltage conversion branch includes a series-connected buck circuit and a second output port, i.e. Figure 2 The circuit includes a buck converter and a second output port (OUT2). The buck converter is a DC-DC converter that reduces its input voltage before outputting a lower voltage. Its input is also electrically connected to the power module and capacitors, converting the mains DC voltage into a lower value that is output from the second output port. This structure allows the first and / or second output ports to be connected according to the specific voltage requirements of the load device.

[0033] It is understood that the two voltage conversion branches provided in this application are only examples. In practice, more voltage conversion branches can be set up according to the requirements (such as the multiple voltage requirements of the load devices to be connected, or multiple load devices with different voltage requirements), and each voltage conversion branch outputs a different voltage value after voltage conversion.

[0034] By designing the multi-channel voltage conversion module to include at least two parallel voltage conversion branches, specifically implemented as first and second voltage conversion branches containing boost and buck circuits, this uninterruptible power supply (UPS) circuit achieves significant output flexibility and versatility. This allows a single device to provide at least two different DC output voltage specifications, thus adapting to a wider range of load devices without requiring separate UPS configurations for controllers or peripherals with different voltage requirements. This not only greatly enhances the product's applicability but also reduces procurement costs for users, simplifies inventory management, and improves system deployment flexibility.

[0035] In some embodiments, the control module in the uninterruptible power supply circuit has its first input terminal selectively connected to the output terminal (e.g., OUT1 or OUT2) of a multiplexer module via a switch, and its output terminal (AC_State_IO) is connected to the load device. For example... Figure 2 As shown, the function of this control module can be realized by an optocoupler (or simply optocoupler) and its peripheral circuitry. An optocoupler is a device that transmits electrical signals using light as a medium. It can achieve electrical isolation between the input and output, thereby effectively preventing interference from the load device from affecting the stable operation of this circuit.

[0036] To further improve the adaptability of the circuit, the uninterruptible power supply circuit is also equipped with a level selection unit. For example... Figure 2 As shown, the level selection unit is located in series between the output terminals of all voltage conversion branches and the first input terminal of the control module (i.e., as shown in the diagram). Figure 2 (The "switch" shown in the diagram). Specifically, the level selection unit functions as a human-machine interface. Its multiple inputs are connected to the output ports of different voltage conversion branches (e.g., OUT1 and OUT2), while its single output is connected to the input pin of the first input terminal of the control module. The core function of this unit is to connect the output voltage of a specific voltage conversion branch to the control module based on the user's selection, thereby providing the control module with a variable reference operating voltage and ultimately determining the amplitude of the final output alarm signal.

[0037] In some embodiments, to achieve convenient and reliable manual configuration, the level selection unit can be physically implemented as a DIP switch, jumper cap, or push-button switch. These are all mature and reliable hardware selection switches used in industrial applications, allowing users to intuitively and conveniently set the input / output (I / O) signal levels once and for all, according to the specific requirements of the connected load device during equipment installation or commissioning. For example, the alarm signal level can be configured by toggling different positions of the switch or changing the connection position of the jumper cap, without requiring complex software settings.

[0038] By adding a user-configurable level selection unit, the high-level voltage value of the alarm signal can be precisely matched according to the I / O interface standard of the downstream load device. For example, when the load device is a PLC requiring a 24V I / O signal, the user can switch the level selection unit to the output side of the corresponding boost circuit; while when the load device requires a 12V signal, it can be switched to the output side of the buck circuit. This design greatly enhances the product's electrical compatibility and field application flexibility, enabling a single model to seamlessly connect to a wider variety of control systems, effectively avoiding communication failures caused by signal level mismatch or the hassle of needing to add additional level conversion circuits.

[0039] In some embodiments, the uninterruptible power supply circuit further includes an external power supply detection unit to sense the on / off state of the external AC power supply. The output of this external power supply detection unit (i.e., Figure 2 The AC_State signal is connected to the second input terminal of the control module. Furthermore, the external power detection unit continuously monitors the input status of the power module receiving external AC power. When the external AC power is normal, it outputs a "normal" level signal; when the external AC power is disconnected, it outputs a "disconnected" level signal.

[0040] To effectively communicate the status of the external power supply, the control module also includes a power input terminal (such as...). Figure 2 The VCC terminal shown in the diagram is used to receive its own operating voltage. Based on this, the control module executes explicit logical outputs according to the power supply status: when the power supply status indicates that the external AC power supply is normal, the control module outputs a high-level signal to the load device. This high-level signal serves as a "normal" or "safe" indicator, informing the load device that the external power supply is stable. Conversely, when the power supply status indicates that the external AC power supply is disconnected, the control module outputs a low-level signal. This low-level signal constitutes an alarm signal; its high-to-low level transition can be quickly and reliably identified by the load device as a power failure event.

[0041] Furthermore, to ensure that the signals output by the control module can be correctly received by load devices with different electrical standards, the uninterruptible power supply circuit provided in this application has also undergone refined design of the electrical characteristics of the signals. Specifically, when the power supply status indicates that the external AC power supply is disconnected, the voltage amplitude of the alarm signal output by the control module is determined by the level signal output by the voltage conversion branch selected by the level selection unit. In other words, the user selects a voltage conversion branch (e.g., the first voltage conversion branch outputting 24V) by operating the level selection unit, then when the external AC power supply is normal, the voltage value of the high-level signal output by the control module is 24V, thus matching the load devices that require 24V I / O signals.

[0042] By combining explicit logic level conversion with configurable voltage amplitude, on the one hand, the switching of high and low levels is used to characterize the on / off state of the external power supply, providing the load device with a logically clear and interference-resistant trigger signal, ensuring that power failure events can be accurately captured; on the other hand, the high-level voltage value of the signal can be switched between multiple voltage levels according to actual needs through the level selection unit, solving the electrical compatibility problem between traditional fixed-level signals and different load devices, thus eliminating the need to add level conversion circuits, making the uninterruptible power supply circuit have extremely high versatility and system integration convenience.

[0043] In some embodiments, the operating logic of this uninterruptible power supply circuit is as follows: When the power supply status indicates that the external AC power supply is disconnected, the AC_State signal output by the external power supply detection unit changes. At the same time, the pre-charged capacitor (supercapacitor bank) begins to discharge, and its stored energy serves as a temporary capacitor power supply voltage. After being converted by the multiplex voltage conversion module, it continuously supplies power to the load device, ensuring that the operation of the load device is not interrupted. At the same time, after receiving the changed AC_State signal, the control module flips the state of its internal optocoupler, causing its output terminal to output an alarm signal with a level opposite to that during normal power supply to the load device, clearly informing the load device that the external power supply has been disconnected, so that the load device can take relevant safety measures (such as triggering data saving, device return, etc.).

[0044] In addition, to enhance the safety of equipment during maintenance or long-term downtime, the uninterruptible power supply (UPS) circuit is equipped with a discharge circuit. This discharge circuit is an active safety protection measure that safely releases the charge stored in the capacitor when needed. Depending on its connection, one end of the discharge circuit is electrically connected to the positive or negative terminal of the capacitor, while the other end is grounded, thus forming a complete discharge loop. This design effectively prevents electric shock injuries to operators caused by residual high-voltage charge in the capacitor during maintenance or transportation.

[0045] In some embodiments, to achieve precise control of the discharge process, such as Figure 2 As shown, the discharge circuit specifically includes a discharge resistor R1 connected in series and an electronic switch. The discharge resistor is a power resistor used to limit the current during discharge, preventing instantaneous large currents from impacting or damaging circuit components. The electronic switch, such as a metal-oxide-semiconductor field-effect transistor (MOSFET), acts as the on / off controller for this discharge circuit. Since the electronic switch is connected to the control unit, the control unit can actively turn on the electronic switch according to preset conditions (such as receiving an external maintenance command or the equipment being in a powered-off state for an extended period), thereby initiating a controlled and safe discharge process. The control module controls the electronic switch of this discharge circuit via the IO_1 signal.

[0046] In some embodiments, to provide users with intuitive device status feedback, the uninterruptible power supply circuit also includes a display unit. This display unit is electrically connected to the control unit and is driven by the control unit to display its content. The display unit may be a plurality of light-emitting diode (LED) indicator lights of different colors. Depending on its function, the display unit is used to display at least one or more of the following: power supply status (e.g., indicated by the on / off state of an "AC input" light), capacitor charging status (e.g., indicated by the flashing or constant light of a "charging" light), and fault or alarm status represented by an alarm signal (e.g., indicated by the flashing of an "ERR" light). The display unit may also be a liquid crystal display screen, directly displaying the relevant status information on the screen.

[0047] By integrating the aforementioned discharge circuit and display unit, the overall performance of the uninterruptible power supply circuit provided in this application has been further improved. The introduction of the discharge circuit greatly enhances the product's safety and maintainability, ensuring that potential electric shock risks can be actively eliminated in specific scenarios, reflecting a high level of concern for operator safety. The display unit provides users with a convenient and intuitive human-machine interface, making the device's operating status readily apparent. This not only simplifies daily operation monitoring but also provides crucial information for quickly locating and diagnosing potential problems. Thus, the entire uninterruptible power supply circuit, while retaining its core functions, becomes safer, more reliable, and easier to use.

[0048] When an uninterruptible power supply (UPS) circuit is applied in the field of magnetic drive control, the output terminal of the multiplexer module in the UPS circuit (e.g., Figure 2 OUT1 or OUT2 shown is connected to a magnetic drive controller (such as a DC / AC magnetic drive controller, pulse width modulation controller, servo controller, position controller, speed controller, force / torque controller, etc.).

[0049] When the uninterruptible power supply (UPS) circuit provided in this application is applied to the field of magnetic drive control, it solves the most critical problem of magnetic drive controllers when encountering sudden power failure. Specifically, by providing a clear warning signal at the moment of power failure, the circuit provided in this application can trigger the magnetic drive controller to immediately execute a preset emergency stop procedure. This allows the magnetic drive controller valuable buffer time to safely brake all high-speed moving parts and save their precise position coordinates and other critical state data to non-volatile memory, effectively avoiding hardware damage and time-consuming system re-initialization processes caused by uncontrolled collisions. Secondly, the UPS circuit's multi-voltage output and selectable signal level functions greatly enhance its versatility and adaptability to different types of magnetic drive controllers and their associated I / O modules, enabling a single power supply solution to meet diverse system integration needs, significantly reducing system design complexity and hardware costs. Therefore, the UPS circuit provided in this application greatly improves the operational reliability, safety, and production efficiency of magnetic drive conveyor systems by ensuring data integrity and system controllability.

[0050] In summary, this uninterruptible power supply (UPS) circuit combines a power module, a capacitor as an energy storage element, and a multi-channel voltage conversion module to ensure that the load device still receives a continuous and stable power supply when the external AC power supply is interrupted. More importantly, by setting up a linkage between the external power detection unit and the control module, a clear alarm signal can be output to the load device at the moment of power failure, enabling the load device to promptly obtain the true status of the external power supply and execute preset emergency procedures. This design not only solves the problem of traditional UPS systems failing to provide power failure status feedback, but also greatly improves the versatility for different load devices and the overall reliability of the system through multiple voltage outputs and adaptable signal levels.

[0051] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0052] It should also be understood that the various implementation methods provided in this utility model embodiment can be combined arbitrarily to achieve different technical effects.

[0053] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present utility model.

Claims

1. An uninterruptible power supply circuit, characterized in that, include: The power module is powered by an external AC power source and outputs a DC voltage. A capacitor is electrically connected to the power module, and the capacitor stores electrical energy when the external AC power supply is working normally. A multi-channel voltage conversion module, wherein the input terminals of the multi-channel voltage conversion module are all electrically connected to the power supply module and the capacitor, and the output terminal of the multi-channel voltage conversion module is connected to the load device. The multi-channel voltage conversion module is used to convert the DC voltage of the power supply into at least one output current voltage to power the load device. The control module has a first input terminal connected to the output terminal of the multiplex voltage conversion module, and the output terminal of the control module is connected to the load device. An external power supply detection unit is connected to the second input terminal of the control module, and the external power supply detection unit is used to detect the power supply status of the external AC power supply. When the power supply status indicates that the external AC power supply is disconnected, the capacitor output capacitor power supply voltage continues to supply power to the load device through the multiplex voltage conversion module, and the output terminal of the control module outputs an alarm signal to the load device.

2. The uninterruptible power supply circuit according to claim 1, characterized in that, The multi-channel voltage conversion module includes at least two voltage conversion branches; The input terminal of each voltage conversion branch is electrically connected to the power supply module and the capacitor, and the output terminal of at least one voltage conversion branch is connected to the load device.

3. The uninterruptible power supply circuit according to claim 2, characterized in that, The voltage conversion branch includes a first voltage conversion branch and a second voltage conversion branch; The first voltage conversion branch includes a boost circuit connected in series and a first output port, wherein the boost circuit is electrically connected to the power module and the capacitor; The second voltage conversion branch includes a series-connected step-down circuit and a second output port, both of which are electrically connected to the power module and the capacitor; The first output port and / or the second output port are connected to the load device.

4. The uninterruptible power supply circuit according to claim 2, characterized in that, The uninterruptible power supply circuit also includes a level selection unit, which is connected in series between the output terminals of all the voltage conversion branches and the first input terminal of the control module.

5. The uninterruptible power supply circuit according to claim 4, characterized in that, The level selection mechanism is one of a DIP switch, a jumper cap, or a push-button switch.

6. The uninterruptible power supply circuit according to claim 1, characterized in that, The control module also includes a power input terminal. When the power supply status indicates that the external AC power supply is normal, the output terminal of the control module outputs a high-level signal to the load device. When the power supply status indicates that the external AC power supply is disconnected, the alarm signal output by the output terminal of the control module is a low-level signal.

7. The uninterruptible power supply circuit according to claim 4, characterized in that, When the power supply status indicates that the external AC power supply is disconnected, the alarm signal output by the output terminal of the control module is the level signal output by the voltage conversion branch selected by the level selection unit.

8. The uninterruptible power supply circuit according to claim 1, characterized in that, The uninterruptible power supply return circuit is also provided with a discharge circuit, one end of which is connected to the capacitor and the other end of which is grounded.

9. The uninterruptible power supply circuit according to claim 8, characterized in that, The discharge circuit includes a discharge resistor and an electronic switch connected in series, and the electronic switch is connected to the control module.

10. The uninterruptible power supply circuit according to claim 1, characterized in that, The uninterruptible power supply circuit further includes a display unit connected to the control module. The display unit is used to display at least one of the power supply status, the charging status of the capacitor, and an alarm signal.

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