ACDC power supply control circuit

Abstract

The utility model discloses an ACDC power supply control circuit, which relates to the technical field of ACDC power supply control and comprises an ACDC power supply module used for converting alternating current into direct current; the number of the independent control units is multiple, and each independent control unit is connected with one power supply module and used for independently controlling starting and stopping of the power supply module; and the state feedback circuit is used for monitoring and feeding back the working state of the power supply module. According to the utility model, the traditional hardware circuit design is abandoned, full-digital and modularized control is adopted, each power supply module is independently controlled, and the system reliability is improved. And a domestic DG32 series microcontroller is used, so that the power consumption and the design complexity are reduced, peripheral devices are simplified, and the cost is reduced. A temperature measurement circuit is reserved, a power calculation control strategy is added, and the heat dissipation requirement is judged through a temperature-power curve. And independent control buttons and module protection signals are arranged, and network control is combined, so that comprehensive control is realized, and the flexibility and operation convenience of the system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ACDC power control, and particularly relates to an ACDC power control circuit. Background Art

[0002] A switching power supply consists of a power stage and a control circuit. The function of the control circuit is to adjust the conduction time of the switching device in the power stage when the input voltage internal parameters and the external load change, so that the output voltage or current of the switching power supply remains constant. Therefore, in the design of a switching power supply, the selection and design of the control method are very important for the performance of the switching power supply. Different detection signals and different control circuits will have different control effects.

[0003] Switching power supplies can be classified into single-loop control and double-loop control according to different detection signals. The single-loop control of a constant voltage source is mainly voltage-type control; the double-loop control has control methods such as current-type control. With the development of control theory, some modern control methods, such as non-linear control methods like fuzzy control and sliding mode variable structure control, have also been tried to be applied to the control circuit of switching power supplies, but these control methods have not been widely applied so far.

[0004] The existing ACDC power control systems have the following several main technical problems. First, the traditional control circuit is easily affected by external interference. Especially in a complex electromagnetic environment, the stability and anti-interference ability of the single-chip microcomputer controller are poor, resulting in a serious impact on the reliability of the power supply system. Second, the existing temperature monitoring circuit can only judge the heat dissipation measures based on a single temperature signal, and cannot achieve the comprehensive control of multiple power modules, making it difficult to meet the requirements of modern power management for precise heat dissipation control. In addition, the traditional power control system usually lacks an independent start-stop function, which lacks flexibility and convenience for a multi-output power supply. Finally, the accuracy and stability of the voltage and current sampling circuits are not high, affecting the current sharing control effect between power modules and resulting in poor overall system performance. Therefore, there is an urgent need for a new type of ACDC power control circuit to solve the above problems, improve the reliability, anti-interference ability and control accuracy of the power supply system, and achieve modular and digital comprehensive control.

[0005] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present disclosure, and therefore it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide an ACDC power control circuit, which abandons the traditional hardware circuit design, adopts all-digital and modular control, and each power module is independently controlled to improve the system reliability. The domestic DG32 series microcontrollers are used to reduce power consumption and design complexity, simplify peripheral devices, and reduce costs. The temperature measurement circuit is retained, and a power calculation control strategy is added to judge the heat dissipation requirement through the temperature-power curve. An independent control button and module protection signal are equipped, and combined with network control, comprehensive control is realized to improve the flexibility and operation convenience of the system, so as to solve the problems in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the present utility model provides the following technical solutions: an ACDC power control circuit, comprising:

[0008] An ACDC power module, used for converting alternating current into direct current;

[0009] Multiple independent control units are provided, and each independent control unit is connected to a power module, and is used for independently controlling the start and stop of the power module;

[0010] A status feedback circuit, used for monitoring and feedback the working status of the power module;

[0011] A current sampling circuit and a voltage sampling circuit, respectively used for collecting the output current and output voltage signals of the power module;

[0012] An isolation amplifier circuit, used for isolating and amplifying the collected current and voltage signals;

[0013] A voltage compensation circuit, used for adjusting the output voltage of the power module to achieve current sharing control;

[0014] A microcontroller, used for receiving and processing the signals of the sampling circuit, and realizing the comprehensive control of the power module through an RS flip-flop.

[0015] Preferably, the microcontroller is a domestic DG32 series microcontroller, and its internal adopts a modular design.

[0016] Preferably, the status feedback circuit includes an RS flip-flop and a Darlington transistor, the Q pin of the RS flip-flop is connected to the Darlington transistor, and the start and stop of the power module are realized by controlling the output of the Darlington transistor.

[0017] Preferably, the current sampling circuit includes multiple resistors and operational amplifiers, which are used for processing and amplifying the collected current signals, and the voltage sampling circuit includes multiple resistors and operational amplifiers, which are used for processing and amplifying the collected voltage signals.

[0018] Preferably, the isolation and amplification circuit includes an isolation amplifier for isolating and amplifying current and voltage signals to ensure the accuracy and stability of signal transmission.

[0019] Preferably, the voltage compensation circuit includes a resistor and a voltage regulation module, which changes the output voltage by adjusting the resistance value of the resistor to achieve current sharing control of the power supply module.

[0020] Preferably, the microcontroller further includes a power calculation control strategy, which comprehensively determines whether to take heat dissipation measures by combining the temperature-power curve.

[0021] Preferably, the circuit further includes a plurality of independent control buttons and module protection signals. Combining with the network control signal, the comprehensive control of the power supply module is realized through the trigger processing circuit.

[0022] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0023] The present utility model abandons the traditional hardware circuit design scheme, and adopts a fully digital and modular control method. Each power supply module is independently controlled, avoiding the situation of the whole machine shutting down due to control failures, and improving the reliability of the power supply.

[0024] The present utility model uses a domestic DG32 series microcontroller as the main control unit of the ACDC power supply. Because of its modular design inside, the controller itself has low power consumption, relatively simple interfaces, fast working speed, and few peripheral devices required in the peripheral design, which can greatly reduce the complexity of the design scheme and effectively reduce the design cost.

[0025] The present utility model retains the temperature measurement circuit, and at the same time adds a power calculation control strategy. By calculating the actual output power and combining the "temperature-power" curve in the technical manual, a control instruction on whether to take heat dissipation is given after comprehensive judgment.

[0026] The present utility model is externally connected with independent control buttons and module protection signals, and realizes comprehensive control through the trigger processing circuit in combination with the network control signal. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is the control logic flow chart of the present utility model.

[0029] Figure 2 This is the block diagram of the ACDC power supply - control unit of the present utility model.

[0030] Figure 3 This is the state feedback circuit diagram of the present utility model.

[0031] Figure 4 This is the enable part circuit diagram of the present utility model.

[0032] Figure 5 This is the current sampling circuit diagram of the present utility model.

[0033] Figure 6 and Figure 7 Both are the current sharing circuits of the present utility model. Specific embodiments

[0034] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these exemplary embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0035] The present utility model provides an ACDC power control circuit as shown in Figures 1 to 6 and includes:

[0036] An ACDC power supply module for converting alternating current into direct current;

[0037] A plurality of independent control units, each independent control unit is connected to a power supply module and is used to independently control the start and stop of the power supply module;

[0038] A state feedback circuit for monitoring and feedbacking the working state of the power supply module;

[0039] A current sampling circuit and a voltage sampling circuit for respectively collecting the output current and output voltage signals of the power supply module;

[0040] An isolation amplifier circuit for isolating and amplifying the collected current and voltage signals;

[0041] A voltage compensation circuit for adjusting the output voltage of the power supply module to achieve current sharing control;

[0042] A microcontroller for receiving and processing the signals of the sampling circuit and realizing the comprehensive control of the power supply module through an RS flip - flop.

[0043] System initialization:

[0044] When the power is turned on, the entire system starts to initialize. The microcontroller (MCU) first performs self-check and basic configuration, including configuring input / output ports, initializing control components such as RS flip-flops and Darlington transistors. The AC-DC power module starts to work, converting the input alternating current into direct current to provide basic power for the entire system.

[0045] The domestic DG32 series of the microcontroller has a modular design. It initializes internal modules, loads necessary parameters such as power calculation control strategies and temperature-power curves. It configures communication channels with each independent control unit to ensure that each power module can be independently controlled and monitored.

[0046] The status feedback circuit works:

[0047] The status feedback circuit includes an RS flip-flop and a Darlington transistor, which monitors the working status of each power module. The RS flip-flop transfers the output status of the Q pin to the Darlington transistor according to the status change of the power module, controlling the working status of the Darlington transistor.

[0048] Working status monitoring:

[0049] When the Q pin of the RS flip-flop outputs a low level, the Darlington transistor outputs a high level, the relay coil is not attracted, and the power module is in the off state. When the Q pin of the RS flip-flop outputs a high level, the Darlington transistor outputs a low level, the relay coil is attracted, and the power module starts to work. The status feedback circuit feeds back the real-time status information of the power module to the microcontroller, and the microcontroller makes corresponding control and adjustments according to these feedback information.

[0050] Current and voltage sampling:

[0051] Current sampling circuit: The current sampling circuit consists of multiple resistors and operational amplifiers, and is used to collect the output current signals of each power module. The current signal is processed by resistors R2, R3, R6, R8 and operational amplifier U1A, and is further amplified or reduced by the isolation and amplification circuit composed of U1B, U3, and U4A to ensure the accuracy and stability of the signal.

[0052] Voltage sampling circuit: The voltage sampling circuit also consists of multiple resistors and operational amplifiers, and is used to collect the output voltage signals of each power module. The collected voltage signal is processed and then transmitted to the isolation and amplification circuit for processing to ensure the accuracy and stability of the signal.

[0053] Isolation and amplification processing:

[0054] The isolation amplifier circuit includes an isolation amplifier, which is used to isolate and amplify current and voltage signals to ensure that the signals are not interfered by external factors during transmission. The processed signals are transmitted to the microcontroller, providing basic data for subsequent current sharing control and heat dissipation management.

[0055] Current Sharing Control and Voltage Compensation:

[0056] Current Sharing Control: The microcontroller calculates the output current and voltage of each power module based on the collected current and voltage signals. To ensure consistent current distribution among power modules, the microcontroller adjusts the output voltage of each module through a voltage compensation circuit. The voltage compensation circuit includes resistors and a voltage regulation module. By adjusting the resistance value, the output voltage is changed to achieve current sharing control.

[0057] Voltage Regulation:

[0058] By adjusting the resistance value of the R27 resistor in the voltage compensation circuit, the value of the VADJO-1 signal is changed to ensure the stability of the VADJd-1 voltage signal value. The adjusted signal is transmitted back to the voltage conversion module inside through the voltage compensation circuit to further optimize the output voltage of each power module, achieving precise current sharing control.

[0059] Heat Dissipation Management:

[0060] Power Calculation Control Strategy: The microcontroller loads the power calculation control strategy. By calculating the actual output power and combining it with the temperature-power curve, it comprehensively determines whether heat dissipation measures need to be taken. The system collects real-time temperature data through a temperature sensor and conducts comprehensive analysis with the power data.

[0061] Fan Control: When it is detected that the temperature of the power module is too high or the output power is too large, the microcontroller issues an instruction to start the fan for heat dissipation. The speed of the fan is adjusted according to the temperature and power conditions to ensure that the system operates in the best state. Through this dynamic adjustment method of heat dissipation management, unnecessary energy consumption is avoided, and damage to the system caused by overheating is prevented.

[0062] Independent Start / Stop Control:

[0063] Control Button and Module Protection Signal: Each power module is equipped with an independent control button and a module protection signal. Users can start and stop the power module independently through the control button. The module protection signal communicates with the microcontroller through a trigger processing circuit to achieve comprehensive control of the power module.

[0064] Network Control Signal: The system supports network control signals. Through the network signal, the start and stop of the power module can be remotely controlled. After receiving the network control signal, the microcontroller performs corresponding control operations, further improving the flexibility and operational convenience of the system.

[0065] Fault Detection and Protection:

[0066] Fault Detection: The system has a fault detection function and monitors the working status of the power supply module in real time through the current and voltage sampling circuits. When abnormal current or voltage signals are detected, the microcontroller immediately issues an alarm and records the fault information.

[0067] Protection Measures: The system automatically shuts down the faulty power supply module to prevent the fault from expanding. The fault information is displayed and transmitted through the display screen and network interface, facilitating timely handling by maintenance personnel.

[0068] Integrated Control and Display:

[0069] Integrated Control: The microcontroller, as the core control unit of the system, comprehensively processes various sampling signals, status feedback signals, and control signals for overall coordination. According to different working modes and environmental conditions, the microcontroller dynamically adjusts the working status and output parameters of each power supply module to ensure that the system operates in the best state.

[0070] Display and Communication:

[0071] The system is equipped with a display screen and a network interface to display in real time the working status, output current and voltage, temperature, fault information, etc. of each power supply module. Through the network interface, the system can communicate with the host computer or other devices to achieve remote monitoring and management.

[0072] Only some exemplary embodiments of the present utility model have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. An ACDC power supply control circuit, characterized in that: include: ACDC power module, used to convert AC power into DC power; An independent control unit is provided in plurality, each of which is connected to a power module and is used to independently control the start and stop of the power module; A state feedback circuit is used to monitor and feedback the working state of the power module; The current sampling circuit and the voltage sampling circuit are used to collect the output current and output voltage signals of the power module respectively; An isolation amplifier circuit is used to isolate and amplify the collected current and voltage signals; A voltage compensation circuit is used to adjust the output voltage of the power module to achieve current sharing control; The microcontroller is used to receive and process the signal of the sampling circuit and realize the comprehensive control of the power module through the RS trigger.

2. The ACDC power supply control circuit according to claim 1, characterized in that: The microcontroller is a domestically produced DG32 series microcontroller, which adopts a modular design internally.

3. The ACDC power supply control circuit according to claim 1, characterized in that: The state feedback circuit comprises an RS trigger and a Darlington transistor, the Q pin of the RS trigger is connected to the Darlington transistor, and the start and stop of the power module are achieved by controlling the output of the Darlington transistor.

4. The ACDC power supply control circuit according to claim 1, characterized in that: The current sampling circuit includes a plurality of resistors and an operational amplifier for processing and amplifying the collected current signal, and the voltage sampling circuit includes a plurality of resistors and an operational amplifier for processing and amplifying the collected voltage signal.

5. The ACDC power supply control circuit according to claim 1, characterized in that: The isolation amplifier circuit includes an isolation amplifier, which is used to isolate and amplify the current and voltage signals to ensure the accuracy and stability of signal transmission.

6. The ACDC power supply control circuit according to claim 1, characterized in that: The voltage compensation circuit includes a resistor and a voltage regulating module, and the output voltage is changed by adjusting the resistance value of the resistor to achieve current sharing control of the power supply module.

7. The ACDC power supply control circuit according to claim 1, characterized in that: The microcontroller also includes a power calculation control strategy, which combines the temperature-power curve to comprehensively determine whether to take heat dissipation measures.

8. The ACDC power supply control circuit according to claim 1, characterized in that: The circuit also includes a plurality of independent control buttons and module protection signals, which are combined with network control signals to realize comprehensive control of the power module through a trigger processing circuit.

Images