Controller of three-in-one single-phase voltage regulator

Abstract

The invention discloses a controller of a three-in-one single-phase voltage regulator, and the controller comprises a power module which is used for providing a stable working power supply for the whole controller; the voltage sampling module is used for collecting a voltage signal output by the single-phase voltage regulator in real time and converting the voltage signal into an electric signal suitable for being processed by the main control module; the current sampling module is used for collecting a current signal of the single-phase voltage regulator in real time and converting the current signal into an electric signal suitable for being processed by the main control module; the gear control module comprises a plurality of gear control circuits and is used for controlling gear switching of the single-phase voltage regulator so as to realize different voltage regulation ranges; and the main control module is respectively connected with the power supply module, the voltage sampling module, the current sampling module and the gear control module and is used for receiving signals of the voltage sampling module and the current sampling module. According to the invention, the voltage sampling module adopts a voltage transformer and a signal conditioning circuit, so that errors in the signal acquisition process are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of single-phase voltage regulator control, and in particular to a controller of a three-in-one single-phase voltage regulator. Background Art

[0002] In the operation of power systems and many electrical equipment, voltage stability and precise regulation are crucial. As a device that can adjust single-phase voltage, single-phase voltage regulators are widely used in industrial production, laboratory testing, household appliances and other fields. However, existing single-phase voltage regulator controllers have some shortcomings, such as low control accuracy, unable to quickly and accurately adjust the voltage to the target value; relatively single control function, unable to meet diverse voltage regulation needs; reliability needs to be improved, prone to failures under complex working conditions and other problems. Therefore, a new type of single-phase voltage regulator controller is needed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a controller for a three-in-one single-phase voltage regulator to achieve accurate, reliable and multifunctional control of the single-phase voltage regulator.

[0004] To achieve the above object, the present invention provides the following technical solutions: A controller for a three-in-one single-phase voltage regulator, characterized by comprising: Power module, used to provide stable working power for the entire controller; The voltage sampling module is used to collect the voltage signal output by the single-phase voltage regulator in real time and convert it into an electrical signal suitable for processing by the main control module; The current sampling module is used to collect the current signal of the single-phase voltage regulator in real time and convert it into an electrical signal suitable for processing by the main control module; A gear control module, including a plurality of gear control circuits, for controlling the gear switching of the single-phase voltage regulator to achieve different voltage regulation ranges; The main control module is connected to the power supply module, voltage sampling module, current sampling module and gear control module respectively, and is used to receive signals from the voltage sampling module and the current sampling module, and control the gear control module according to a preset control strategy to achieve precise regulation of the output voltage of the single-phase voltage regulator.

[0005] The present invention is further arranged that the voltage sampling module includes a voltage transformer and a signal conditioning circuit, the voltage transformer is used to convert the high voltage output by the single-phase voltage regulator into a low voltage, and the signal conditioning circuit is used to amplify, filter and other processes the converted low voltage signal to output an electrical signal suitable for processing by the main control module.

[0006] The present invention is further arranged that the current sampling module includes a current transformer and a signal conditioning circuit, wherein the current transformer is used to convert the large current of the single-phase voltage regulator into a small current, and the signal conditioning circuit is used to amplify, filter, and perform other processing on the converted small current signal to output an electrical signal suitable for processing by the main control module.

[0007] The present invention further provides that each gear control circuit of the gear control module includes a relay and a control switch, the relay is used to realize the switching of the gear of the single-phase voltage regulator, and the control switch is used to control the on and off of the relay.

[0008] The present invention is further arranged that the main control module is a microprocessor, and the microprocessor has a built-in control algorithm. The control algorithm calculates the current voltage and current values ​​based on the signals collected by the voltage sampling module and the current sampling module, and compares them with the preset target voltage values, and controls the gear control module to switch gears according to the comparison results.

[0009] The present invention is further configured that the control algorithm also includes overvoltage protection and overcurrent protection functions. When the collected voltage value exceeds a preset overvoltage threshold or the current value exceeds a preset overcurrent threshold, the main control module controls the gear control module to switch to a safe gear or cut off the power supply.

[0010] The present invention is further configured to include a communication module, which is connected to the main control module and is used to realize data communication between the controller and external devices, and the external devices include a host computer, a mobile phone, etc.

[0011] The present invention further provides that the communication module is a wireless communication module or a wired communication module, the wireless communication module includes a Bluetooth module, a Wi-Fi module, etc., and the wired communication module includes an RS-485 interface, an Ethernet interface, etc.

[0012] The present invention is further configured to include a display module, which is connected to the main control module and is used to display information such as the output voltage, current, gear position, etc. of the single-phase voltage regulator in real time.

[0013] The present invention further provides that the display module is a liquid crystal display screen or a digital tube display screen.

[0014] Beneficial effects of the present invention: High-precision voltage sampling and processing: The voltage sampling module uses a voltage transformer and a signal conditioning circuit, which can accurately convert the high voltage output by the single-phase voltage regulator into an electrical signal suitable for processing by the main control module, effectively reducing errors in the signal acquisition process. At the same time, the current sampling module accurately collects and processes the current signal through a current transformer and a signal conditioning circuit. Based on high-precision voltage and current signals and using advanced control algorithms, the main control module can accurately calculate the deviation between the current voltage and the target voltage, and implement a fine gear adjustment strategy based on the size of the deviation, thereby achieving high-precision regulation of the output voltage of the single-phase voltage regulator, meeting various application scenarios with extremely high requirements for voltage stability, such as precision electronic equipment testing, high-precision laboratory measurements, etc.

[0015] Intelligent gear adjustment: Each gear control circuit of the gear control module is composed of relays and control switches. With the intelligent control algorithm of the main control module, the gear of the single-phase voltage regulator can be switched flexibly and accurately according to the actual voltage deviation. Not only can multiple gears be quickly adjusted to quickly approach the target voltage when the voltage deviation is large, but also fine-tuning can be performed when the voltage is close to the target value to avoid voltage fluctuations caused by over-adjustment. Compared with traditional voltage regulator controllers, the accuracy and stability of voltage regulation are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 Schematic diagram of an electrical circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] like Figure 1 As shown, the present invention provides a controller for a three-in-one single-phase voltage regulator, comprising: Power module, used to provide stable working power for the entire controller; The voltage sampling module is used to collect the voltage signal output by the single-phase voltage regulator in real time and convert it into an electrical signal suitable for processing by the main control module; The current sampling module is used to collect the current signal of the single-phase voltage regulator in real time and convert it into an electrical signal suitable for processing by the main control module; A gear control module, including a plurality of gear control circuits, for controlling the gear switching of the single-phase voltage regulator to achieve different voltage regulation ranges; The main control module is connected to the power supply module, voltage sampling module, current sampling module and gear control module respectively, and is used to receive signals from the voltage sampling module and the current sampling module, and control the gear control module according to a preset control strategy to achieve precise regulation of the output voltage of the single-phase voltage regulator.

[0019] Among them, the voltage sampling module includes a voltage transformer and a signal conditioning circuit. The voltage transformer is used to convert the high voltage output by the single-phase voltage regulator into a low voltage, and the signal conditioning circuit is used to amplify, filter and other processes the converted low voltage signal to output an electrical signal suitable for processing by the main control module.

[0020] Among them, the current sampling module includes a current transformer and a signal conditioning circuit. The current transformer is used to convert the large current of the single-phase voltage regulator into a small current. The signal conditioning circuit is used to amplify, filter and other processes the converted small current signal to output an electrical signal suitable for processing by the main control module.

[0021] Wherein, each gear control circuit of the gear control module includes a relay and a control switch, the relay is used to realize the switching of the gear of the single-phase voltage regulator, and the control switch is used to control the on and off of the relay.

[0022] Among them, the main control module is a microprocessor, and the microprocessor has a built-in control algorithm. The control algorithm calculates the current voltage and current values ​​according to the signals collected by the voltage sampling module and the current sampling module, and compares them with the preset target voltage values, and controls the gear control module to switch gears according to the comparison results.

[0023] Among them, the control algorithm also includes overvoltage protection and overcurrent protection functions. When the collected voltage value exceeds the preset overvoltage threshold or the current value exceeds the preset overcurrent threshold, the main control module controls the gear control module to switch to a safe gear or cut off the power supply.

[0024] The present invention also includes a communication module, which is connected to the main control module and is used to realize data communication between the controller and external devices, and the external devices include a host computer, a mobile phone, etc.

[0025] The communication module in the present invention is a wireless communication module or a wired communication module. The wireless communication module includes a Bluetooth module, a Wi-Fi module, etc., and the wired communication module includes an RS-485 interface, an Ethernet interface, etc.

[0026] The present invention also includes a display module, which is connected to the main control module and is used to display the output voltage, current, gear position and other information of the single-phase voltage regulator in real time. The display module is a liquid crystal display or a digital tube display.

[0027] The present invention uses high-precision voltage sampling and processing: the voltage sampling module uses a voltage transformer and a signal conditioning circuit, which can accurately convert the high voltage output by the single-phase voltage regulator into an electrical signal suitable for processing by the main control module, effectively reducing the error in the signal acquisition process. At the same time, the current sampling module accurately collects and processes the current signal through a current transformer and a signal conditioning circuit. Based on high-precision voltage and current signals and using advanced control algorithms, the main control module can accurately calculate the deviation between the current voltage and the target voltage, and implement a fine gear adjustment strategy based on the size of the deviation, thereby achieving high-precision adjustment of the output voltage of the single-phase voltage regulator, meeting various application scenarios with extremely high requirements for voltage stability, such as precision electronic equipment testing, high-precision laboratory measurements, etc.

[0028] Intelligent gear adjustment: Each gear control circuit of the gear control module is composed of relays and control switches. With the intelligent control algorithm of the main control module, the gear of the single-phase voltage regulator can be switched flexibly and accurately according to the actual voltage deviation. Not only can multiple gears be quickly adjusted to quickly approach the target voltage when the voltage deviation is large, but also fine-tuning can be performed when the voltage is close to the target value to avoid voltage fluctuations caused by over-adjustment. Compared with traditional voltage regulator controllers, the accuracy and stability of voltage regulation are greatly improved.

[0029] The intelligent control algorithm is as follows: Data acquisition and preliminary processing: The intelligent control algorithm first obtains real-time data through the voltage sampling module and the current sampling module. The voltage transformer in the voltage sampling module converts the high voltage output by the single-phase voltage regulator into a low voltage, and then amplifies and filters it through the signal conditioning circuit to obtain a voltage signal suitable for processing by the main control module; the current sampling module is similar, the current transformer converts the large current into a small current, and outputs the current signal after signal conditioning. These signals are transmitted to the main control module as the basic data for the subsequent operation of the algorithm.

[0030] Core part of PID control algorithm: In the main control module, the classic PID (proportional-integral-differential) control algorithm is used. It calculates the deviation between the current voltage and the preset target voltage value based on the collected voltage and current values. The proportional link (P) outputs a control quantity proportional to the deviation according to the deviation size, which is used to quickly respond to the voltage deviation. The larger the deviation, the stronger the regulation effect; the integral link (I) integrates the deviation, which is mainly used to eliminate steady-state errors and ensure that the final output voltage can be stabilized at the target value; the differential link (D) adjusts the control quantity according to the rate of change of the deviation, predicts the voltage change trend in advance, prevents overshoot during the voltage regulation process, and makes the regulation process smoother. For example, when the actual voltage is lower than the target voltage, the proportional link will increase the regulation force, prompting the gear control module to increase the output voltage; the integral link continuously accumulates the deviation and continuously adjusts the output; the differential link optimizes the regulation process according to the speed of change of the voltage deviation to avoid over-regulation.

[0031] Intelligent gear switching strategy: According to the control quantity calculated by the PID algorithm and the actual voltage deviation, the algorithm controls the gear control module to switch gears. When the voltage deviation is large, the algorithm will control the relay to quickly switch multiple gears so that the output voltage quickly approaches the target value; when the voltage is close to the target value, the algorithm controls fine-tuning, switching only one gear at a time or making small voltage adjustments to avoid voltage fluctuations caused by excessive adjustments. For example, in the startup phase or when the voltage fluctuates greatly, multiple gears are quickly switched; and in the stable phase close to the target voltage, fine-tuning of the gears is performed.

[0032] Overvoltage and overcurrent protection algorithm: This algorithm has overvoltage protection and overcurrent protection functions. When the collected voltage value exceeds the preset overvoltage threshold, or the current value exceeds the preset overcurrent threshold, the algorithm responds immediately. The main control module will control the gear control module to switch to a safe gear, such as reducing the output voltage gear, to avoid excessive voltage or current from damaging the equipment; if the situation is serious, the algorithm will control the power supply to ensure the safety of the entire system. For example, when it is detected that the voltage exceeds the safety threshold by 10%, it will immediately switch to a lower voltage gear; if the current exceeds the threshold by 50%, the power supply will be directly cut off.

[0033] Communication and data interaction algorithm: For controllers equipped with communication modules, the intelligent control algorithm also includes the part of data communication with external devices. It can package the collected real-time data such as voltage, current, gear position, etc., and send it to the host computer, mobile phone and other external devices through wireless or wired communication modules according to the communication protocol (such as Bluetooth SDP protocol, Wi-Fi TCP / IP protocol, RS-485 MODBUS protocol, etc.). At the same time, the algorithm can also receive control instructions sent by external devices, such as modifying the target voltage value, querying the device status, etc., and adjust the working status of the voltage regulator according to the instructions.

[0034] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0035] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0036] The above description shows and describes several preferred embodiments of the present invention, but as before, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept of this article through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A controller for a three-in-one single-phase voltage regulator, characterized in that: include: Power module, used to provide stable working power for the entire controller; The voltage sampling module is used to collect the voltage signal output by the single-phase voltage regulator in real time and convert it into an electrical signal suitable for processing by the main control module; The current sampling module is used to collect the current signal of the single-phase voltage regulator in real time and convert it into an electrical signal suitable for processing by the main control module; A gear control module, including a plurality of gear control circuits, for controlling the gear switching of the single-phase voltage regulator to achieve different voltage regulation ranges; The main control module is connected to the power supply module, voltage sampling module, current sampling module and gear control module respectively, and is used to receive signals from the voltage sampling module and the current sampling module, and control the gear control module according to a preset control strategy to achieve precise regulation of the output voltage of the single-phase voltage regulator.

2. The controller of the three-in-one single-phase voltage regulator according to claim 1, characterized in that: The voltage sampling module includes a voltage transformer and a signal conditioning circuit. The voltage transformer is used to convert the high voltage output by the single-phase voltage regulator into a low voltage. The signal conditioning circuit is used to amplify, filter, and perform other processing on the converted low voltage signal to output an electrical signal suitable for processing by the main control module.

3. The controller of the three-in-one single-phase voltage regulator according to claim 1, characterized in that: The current sampling module includes a current transformer and a signal conditioning circuit. The current transformer is used to convert the large current of the single-phase voltage regulator into a small current. The signal conditioning circuit is used to amplify, filter, and perform other processing on the converted small current signal to output an electrical signal suitable for processing by the main control module.

4. The controller of the three-in-one single-phase voltage regulator according to claim 1, characterized in that: Each gear control circuit of the gear control module includes a relay and a control switch. The relay is used to realize the switching of the gear of the single-phase voltage regulator, and the control switch is used to control the on and off of the relay.

5. The controller of the three-in-one single-phase voltage regulator according to claim 1, characterized in that: The main control module is a microprocessor, which has a built-in control algorithm. The control algorithm calculates the current voltage and current values ​​based on the signals collected by the voltage sampling module and the current sampling module, and compares them with the preset target voltage values. The gear control module is controlled to switch gears based on the comparison results.

6. The controller of the three-in-one single-phase voltage regulator according to claim 5, characterized in that: The control algorithm also includes overvoltage protection and overcurrent protection functions. When the collected voltage value exceeds a preset overvoltage threshold or the current value exceeds a preset overcurrent threshold, the main control module controls the gear control module to switch to a safe gear or cut off the power supply.

7. The controller of the three-in-one single-phase voltage regulator according to claim 1, characterized in that: It also includes a communication module, which is connected to the main control module and is used to realize data communication between the controller and external devices, including a host computer, a mobile phone, etc.

8. The controller of the three-in-one single-phase voltage regulator according to claim 7, characterized in that: The communication module is a wireless communication module or a wired communication module. The wireless communication module includes a Bluetooth module, a Wi-Fi module, etc., and the wired communication module includes an RS-485 interface, an Ethernet interface, etc.

9. The controller of the three-in-one single-phase voltage regulator according to claim 1, characterized in that: It also includes a display module, which is connected to the main control module and is used to display the output voltage, current, gear position and other information of the single-phase voltage regulator in real time.

10. The controller of the three-in-one single-phase voltage regulator according to claim 9, characterized in that: The display module is a liquid crystal display screen or a digital tube display screen.

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