Digital intelligent power supply device based on PFGA

Abstract

The invention discloses a digital intelligent power supply device based on a PFGA. The digital intelligent power supply device comprises human-computer interaction equipment, an FPGA digital control chip, an A / D converter, a D / A converter, a storage module, a compensation circuit, a monitoring module and a controller, the input end of the man-machine interaction equipment is connected with the FPGA digital control chip; the output end of the FPGA digital control chip is connected with the D / A converter, the output end of the D / A converter is connected with the compensation circuit, the output end of the compensation circuit is connected with the controller, the output end of the controller is connected with the monitoring module, the output end of the monitoring module is connected with the FPGA digital control chip, the A / D converter and the storage module, and the output end of the A / D converter is connected with the FPGA digital control chip. Aiming at the application of a digital power supply and an analog power supply at the present stage, accurate monitoring of an intelligent power supply and excellent characteristics of the digital power supply are exerted, each module of the system is monitored in real time and fed back to a user side, a user can adjust power supply parameters at will to meet a complex system, and the working state of the system is diagnosed through a monitoring function.

Description

Technical Field

[0001] The present invention relates to the technical field of digital power supply, and in particular to a digital intelligent power supply device based on FPGA. Background Art

[0002] In the fields of national defense, medical equipment and aerospace, the rapid development of high-precision technology has created higher requirements for the reliability and accuracy of power supply systems. Due to the complex use environment and high maintenance costs after failures, the power supply system of system-level equipment needs to take into account both high performance and high reliability, and have a certain degree of flexibility and adaptability. Each module using the power supply system can be monitored and the power supply parameters can be flexibly adjusted.

[0003] The current application of traditional power supplies has problems such as low switching frequency, large frequency fluctuations, large electromagnetic interference, and inability to implement parameter adjustment, which makes it difficult to meet the requirements of future equipment for power reliability and accuracy. In addition, with the increase in the complexity of system design, the number of components used in the use of a single analog power supply also increases, and the problem of poor output consistency becomes more and more obvious. In the debugging process that requires power supply coordination, the flexibility of existing power supply technology is poor, and it is impossible to monitor and remotely control the power supply output parameters in real time. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a digital intelligent power supply device based on FPGA.

[0005] The objective of the present invention is achieved through the following technical solutions: The present invention provides a digital intelligent power supply device based on FPGA, including: a human-computer interaction device, an FPGA digital control chip, an A / D converter, a D / A converter, a storage module, a compensation circuit, a monitoring module and a controller; The input end of the human-computer interaction device is connected to the FPGA digital control chip, and the human-computer interaction device is used for the user to input instructions and transmit them to the FPGA digital control chip; The output end of the FPGA digital control chip is connected to a D / A converter, the output end of the D / A converter is connected to a compensation circuit, the output end of the compensation circuit is connected to a controller, the output end of the controller is connected to a monitoring module, the output end of the monitoring module is respectively connected to the FPGA digital control chip, the A / D converter and the storage module, and the output end of the A / D converter is connected to the FPGA digital control chip; the D / A converter controls the controller based on the user instruction; The A / D converter and D / A converter are used for sampling. The FPGA digital control chip determines and controls the state of the internal power tube through the sampling of the A / D converter and improves the performance through soft switching.

[0006] Furthermore, the FPGA digital control chip is provided with a control interface, the input end of the human-computer interaction device is connected to the control interface, and the data interface is used to transmit parameters of instructions input by the user.

[0007] Preferably, the human-computer interaction device comprises a control device and a display device, and the control device and the display device are respectively connected to the FPGA digital control chip through the control interface.

[0008] Furthermore, the FPGA digital control chip writes the user instructions into the FPGA memory to issue instructions; reads out the internal data of the corresponding FPGA memory for real-time monitoring of system parameters; compares with pre-written parameters to observe the working status of each functional module of the system; and controls the power supply of different functional modules independently and performs switch control.

[0009] Furthermore, the FPGA digital control chip adopts weight control to accurately distribute the power supply of different modules. The weight control generates a variable weight coefficient Q(x) by functionally weighting the coefficients of the collected data function I(x). The entire digital power supply is regarded as a macro system, and each power supply function module is regarded as a subsystem. The corresponding monitoring algorithm adapted to different systems is generated as follows: .

[0010] Furthermore, the data of the compensation circuit and the monitoring circuit are converted and input into the FPGA digital control chip.

[0011] Furthermore, it also includes two electrical loads, the input ends of the two electrical loads are connected to the controller, and the output ends of the two electrical loads are connected to the monitoring module.

[0012] The beneficial effects of the present invention are: 1) The present invention uses FPGA as the system control core, and its parallel processing has fast transmission speed, improves real-time performance, has strong multi-task processing capabilities, and can cope with the power supply and monitoring of multiple modules.

[0013] 2) The present invention improves the problems of low switching frequency, large frequency fluctuation, large electromagnetic interference, and inability to adjust in real time in traditional power supply designs.

[0014] 3) The power supply parameters of the present invention can be adjusted to adapt to the parameters of devices in different projects and perform multi-channel synchronous output.

[0015] 4) The present invention can realize monitoring function and power management function, monitor and control the status of electrical equipment, and implement maintenance and warning schemes according to different status. Power management can effectively allocate resources to different electrical equipment, improve power supply efficiency and reduce losses.

[0016] 5) Compared with the traditional power supply circuit, the digital power supply hardware circuit and software design of the present invention are simpler. The circuit inside the traditional power supply cannot be adjusted in real time after the hardware is solidified, and it is difficult to adapt to different debugging scenarios. The digital power supply has programming characteristics and can change the required parameters of itself through instructions to participate in debugging scenarios such as troubleshooting.

[0017] 6) The high accuracy and excellent scalability of the present invention can be redesigned to monitor temperature and humidity, etc., to meet the power supply needs of high-demand devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the system structure of a digital intelligent power supply device based on FPGA according to an embodiment of the present invention; Figure 2 A schematic diagram of the working process of a digital intelligent power supply device based on FPGA according to an embodiment of the present invention; Figure 3 The present invention is a schematic diagram of a connection between an FPGA-based digital intelligent power supply device and external equipment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] For example, the present invention provides a digital intelligent power supply device based on FPGA. Aiming at the current application of digital power supply and analog power supply, the present invention gives full play to the precise monitoring function of intelligent power supply and the excellent characteristics of digital power supply, monitors each module of the system in real time and feeds back to the user end. The user can adjust the power supply parameters at will to meet the needs of complex systems, and diagnoses the working status of the system through the monitoring function. The structural diagram is shown in FIG. Figure 1 As shown, it includes: human-computer interaction equipment, FPGA digital control chip, A / D converter, D / A converter, storage module, compensation circuit, monitoring module and controller; The input end of the human-computer interaction device is connected to the FPGA digital control chip. The human-computer interaction device is used for user input instructions and transmits them to the FPGA digital control chip. The FPGA digital control chip contains expandable logic algorithms and software algorithms, which can be adapted according to different monitoring ports at the system level.

[0021] The output end of the FPGA digital control chip is connected to a D / A converter, the output end of the D / A converter is connected to a compensation circuit, the output end of the compensation circuit is connected to a controller, the output end of the controller is connected to a monitoring module, the output end of the monitoring module is respectively connected to the FPGA digital control chip, the A / D converter and the storage module, and the output end of the A / D converter is connected to the FPGA digital control chip; the D / A converter controls the controller based on the user instruction; Specifically, the A / D converter and D / A converter are used for sampling. Since the traditional analog switch has disadvantages in volume, reliability and control accuracy, the power supply using digital technology is more integrated, which greatly reduces the number of components and improves the accuracy and volume of the power supply. The FPGA digital control chip judges and controls the state of the internal power tube through the sampling of the A / D converter, and improves the performance through soft switching. The soft switching technology can realize zero voltage switching of the device through a resonant circuit, and improve problems such as large input current ripple and severe output voltage waveform distortion.

[0022] Specifically, a control interface is provided on the FPGA digital control chip, the input end of the human-computer interaction device is connected to the FPGA digital control chip through the control interface, and the parameters of the instructions input by the user of the human-computer interaction device are transmitted to the FPGA digital control chip through the data interface.

[0023] Specifically, the human-computer interaction device includes a control device and a display device, and the control device and the display device are connected to the FPGA digital control chip through the control interface respectively. The human-computer interaction device can connect the control interface with the control device and the display device, such as using a keyboard to input instructions and displaying it to view real-time monitoring data. Users can input instructions through an external control device and transmit parameters through a data interface, such as I2C, PMBUS and other interfaces.

[0024] For example, the two logic algorithms and software algorithm programs are solidified in the FPGA chip. The software algorithm is mainly responsible for the control interface, the issuance of human-computer interaction instructions, data reading and analysis, etc. The logic algorithm is mainly responsible for the hardware circuit control, sampling data preprocessing, system monitoring algorithm and other functions.

[0025] Specifically, the control interface displays the power on / off control switch, monitoring data of each power supply module of the system, command control options, etc. The FPGA digital control chip writes the user instructions into the FPGA memory to issue instructions; reads out the internal data of the corresponding FPGA memory for real-time monitoring of system parameters; compares with pre-written parameters to observe the working status of each functional module of the system; and controls the power supply of different functional modules independently and performs switch control through subsystem power supply control.

[0026] Specifically, the logic algorithm realizes the parameter acquisition of the hardware circuit and generates data records for uploading. The FPGA digital control chip adopts weight control to accurately distribute the power supply of different modules. The weight control generates a variable weight coefficient Q(x) by functionally weighting the coefficients of the acquisition data function I(x). The entire digital power supply is regarded as a macro system, and each power supply function module is regarded as a subsystem. The corresponding monitoring algorithm adapted to different systems is generated as follows: .

[0027] Specifically, the data of the compensation circuit and the monitoring circuit are converted and input into the FPGA digital control chip, and the user's instructions will control the controller through the D / A converter, such as PWM, to complete its functional instruction items. There are multiple channels, timers, interrupt controls, external IO interfaces and communication ports in the chip. During the debugging process, the power electronic equipment can be digitally tested through the chip, and the memory data can be read through the port to diagnose the status function of the system, simplifying the design cost of the system.

[0028] Exemplarily, two power loads are also included, the input ends of the two power loads are connected to the controller, and the output ends of the two power loads are connected to the monitoring module. In the future, the device can be applied to topological circuits such as hard-switched full-bridge and half-bridge. Compared with DSP, FPGA has faster computing speed and richer logic resources, and can be programmed using control algorithms to enable the power supply to have faster transient response. In addition, the device is highly portable and has a wide range of usage scenarios, such as ZYNQ chips.

[0029] Specifically, the intelligent digital power supply realizes the combination of digital technology and analog technology. The digital power supply is easy to use in parallel under synchronous signals, making full use of scalability and repeatability, realizing load current sharing, and simplifying the design of filter circuits. Compared with traditional analog circuits, digital power supplies can also perform online programming, efficiency optimization, control algorithms, precise operation and system management, and compared with analog power supplies, digital power supplies have further improved and enhanced their errors, error effects, aging drift and compensation. The reliability is better, and stable and consistent control parameters can be obtained without tuning. From an economic point of view, digital intelligent power supplies can also be reused on hardware platforms, adapting different firmware according to the unique requirements of different systems, broadening the model restrictions of products, improving the utilization rate of components, and reducing development costs and risks.

[0030] Specifically, analog power supplies are currently widely used in the market. With the change of technology, the market will mainly lean towards digital power supplies, which are controlled by digital devices. The power supply parameters can be adjusted in real time, and the FPGA technology with parallel processing characteristics can be used to accelerate the processing and system response speed. Digital power supplies also have the advantage of remote control, which can realize remote control of power supply equipment and bring great convenience and advantages to the detection and operation of system-level equipment.

[0031] Exemplarily, the workflow diagram of the present invention is as follows Figure 2 As shown. When the system is powered on, the digital intelligent power supply is connected to the power consumption system and starts to monitor the power supply and control of each module. If necessary, power management can be performed on different modules according to the user's parameter settings to improve the overall power distribution efficiency of the system. While detecting the user module, it waits to receive the user's instructions. If the instructions are generated, the parameters are transmitted to the control chip and the controller to adjust the parameters of the power consumption equipment. If no instructions are generated, the monitoring state is maintained. If the power consumption equipment has abnormal power consumption, such as abnormal temperature and current, the fault is transmitted back to the chip in real time, and the display device sends a warning message and records it in the monitoring log. According to the needs of different projects, functions such as temperature and pressure measurement can be deleted or added, and the flexibility and safety are greatly improved. The transmission speed of the FPGA chip is faster, and the abnormal conditions detected can be diagnosed and warned in time.

[0032] For example, the connection diagram of the present invention with external devices is as follows: Figure 3 As shown, it includes: external devices, FPGA-based digital intelligent power supply, index parameters and various power loads. In practical applications, the external devices can be the display and keyboard of the computer. The chip used by the FPGA-based digital intelligent power supply is an FPGA chip or ZYNQ chip that meets the functional resource application. The index parameters and various power loads can be any device. By adjusting the digital power supply parameters, it can adapt to the application environment of different devices. With the increase in the complexity of modern systems, miniaturization and integration have become certain index requirements. The integration of each module of the digital power supply is high, and the sensitivity to the complexity of different systems is low. The number of components is reduced during the production process, and it can be used by simply connecting to the system. The parallel multi-port transmission and processing characteristics can also collect and process data in multiple channels, optimizing the errors, aging, temperature effects, drift and compensation problems in traditional power supplies. During use, components such as filters can be flexibly replaced to improve the accuracy of digital power supplies. Updating different topologies and control algorithms can adapt to a variety of power devices.

[0033] The above is only a preferred embodiment of the present invention. 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 concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A digital intelligent power supply device based on PFGA, characterized in that: include: Human-computer interaction equipment, FPGA digital control chip, A / D converter, D / A converter, storage module, compensation circuit, monitoring module and controller; The input end of the human-computer interaction device is connected to the FPGA digital control chip, and the human-computer interaction device is used for the user to input instructions and transmit them to the FPGA digital control chip; The output end of the FPGA digital control chip is connected to a D / A converter, the output end of the D / A converter is connected to a compensation circuit, the output end of the compensation circuit is connected to a controller, the output end of the controller is connected to a monitoring module, the output end of the monitoring module is respectively connected to the FPGA digital control chip, the A / D converter and the storage module, and the output end of the A / D converter is connected to the FPGA digital control chip; the D / A converter controls the controller based on the user instruction; The A / D converter and D / A converter are used for sampling. The FPGA digital control chip determines and controls the state of the internal power tube through the sampling of the A / D converter and improves the performance through soft switching.

2. The digital intelligent power supply device based on PFGA according to claim 1, characterized in that: The FPGA digital control chip is provided with a control interface, the input end of the human-computer interaction device is connected to the control interface, and the data interface is used to transmit the parameters of the instruction input by the user.

3. The digital intelligent power supply device based on PFGA according to claim 2, characterized in that: The human-computer interaction device comprises a control device and a display device, and the control device and the display device are respectively connected to the FPGA digital control chip through the control interface.

4. The digital intelligent power supply device based on PFGA according to claim 1, characterized in that: The FPGA digital control chip writes the user instructions into the FPGA memory to issue instructions; reads out the internal data of the corresponding FPGA memory for real-time monitoring of system parameters; compares with pre-written parameters to observe the working status of each functional module of the system; and controls the power supply of different functional modules independently and performs switch control through subsystem power supply control.

5. The digital intelligent power supply device based on PFGA according to claim 1, characterized in that: The FPGA digital control chip adopts weight control to accurately distribute the power supply of different modules. The weight control generates a variable weight coefficient Q(x) by functionally weighting the coefficients of the collected data function I(x). The entire digital power supply is regarded as a macro system, and each power supply function module is regarded as a subsystem. The corresponding monitoring algorithm adapted to different systems is generated as follows: .

6. The digital intelligent power supply device based on PFGA according to claim 1, characterized in that: The data of the compensation circuit and the monitoring circuit are converted and input into the FPGA digital control chip.

7. The digital intelligent power supply device based on PFGA according to claim 1, characterized in that: It also includes two electrical loads, the input ends of the two electrical loads are connected to the controller, and the output ends of the two electrical loads are connected to the monitoring module.

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