A rectifier multifunctional step-up / down control circuit

Abstract

This invention discloses a multi-functional buck-boost control circuit for a rectifier, relating to the field of rectifier control technology. It includes a microcontroller module that controls the rectifier processing module for rectification. The microcontroller performs high-frequency regulation by controlling a switching transistor and controls the upper and lower half-capacitors to perform alternating dual-path energy storage and series power supply. It can also achieve boost and buck power supply to the first interface module by changing the transmission path of the first interface module. When buck powering the first interface module, the energy storage module can be controlled to store the energy released by the lower half-capacitor, or the second interface module can be controlled to receive the energy released by the lower half-capacitor. When further boost power supply is needed, the energy storage module and the rectifier processing module can be controlled to perform series boost power supply when the energy storage module is fully charged. This multi-functional buck-boost control circuit for rectifiers can achieve voltage balance control, avoid voltage jumps, improve energy utilization, and provide multi-path power supply, increasing the output voltage range.

Description

Technical Field

[0001] This invention relates to the field of rectification control technology, specifically a multi-functional buck-boost control circuit for a rectifier. Background Technology

[0002] Currently, rectifiers are widely used in chargers, charging piles, DC power transmission systems, etc. To improve the flexibility and control accuracy of rectifiers, thyristor rectifiers composed of switching devices are used for power regulation and rectification. In order to boost or buck the rectified power, Bus or Boost circuits are used. However, the Bus or Boost circuit has high losses and low power supply continuity. When a fault occurs, it cannot continue to maintain the power supply state, so it needs to be improved. Summary of the Invention

[0003] This invention provides a multi-functional buck-boost control circuit for a rectifier to solve the problems mentioned in the background art.

[0004] According to an embodiment of the present invention, a multi-functional buck-boost control circuit for a rectifier is provided, comprising:

[0005] The rectifier module, connected to the energy storage module, is used to rectify the incoming AC power. It controls the switching transistor to perform high-frequency regulation and controls the upper and lower half capacitors to perform alternating dual-path energy storage processing on the rectified power, providing the second and third power respectively. It discharges or transmits the rectified power stored in the upper and lower half capacitors in series and outputs the first power. When it is necessary to increase the output power voltage, it switches the power transmission path and connects the first power with the fourth power output from the energy storage module in series to boost the voltage.

[0006] The first interface module is connected to the rectifier processing module and is used to switch the power transmission path and transmit the first power or the second power to the connected electrical equipment.

[0007] The energy storage module is used to store the third electrical energy. When the stored energy is greater than the set full charge threshold, it outputs a full charge signal, releases the stored electrical energy and outputs the fourth electrical energy. When the switching transistor of the rectifier module fails, the fourth electrical energy is transferred to the lower half capacitor of the rectifier module.

[0008] The second interface module is connected to the rectifier module and is used to transmit the third electrical energy to the connected electrical equipment.

[0009] The microcontroller module, connected to the first interface module, the second interface module, the rectifier module, and the energy storage module, is used to control the switching transistor of the rectifier module for high-frequency adjustment, control the upper and lower half capacitors for alternating dual-path energy storage, control the first interface module to receive the first electrical energy during boost rectification, control the rectifier module to switch the power transmission path when a full-charge signal is received and further boost rectification is needed, control the rectifier module to receive the second electrical energy during buck rectification, control the first interface module to receive the second electrical energy and control the energy storage module to receive the third electrical energy, control the energy storage module to stop receiving the third electrical energy when the second interface module needs to receive the third electrical energy, and control the energy storage module to transfer the fourth electrical energy to the lower half capacitor of the rectifier module when the switching transistor of the rectifier module fails.

[0010] As a further embodiment of the present invention: the rectifier module includes a power port, a first inductor, a first diode, a second diode, a third diode, a fourth diode, an eighth diode, a first capacitor, a second capacitor, a first resistor, a first switching transistor, a third thyristor, a first inverter, and a second thyristor; the microcontroller module includes a first controller;

[0011] Preferably, the first end of the power supply port is connected to the anode of the first diode and the cathode of the second diode through a first inductor. The cathode of the first diode is connected to the cathode of the third diode and the anode of the eighth diode. The cathode of the eighth diode is connected to the first end of the first capacitor and one end of the first resistor. The second end of the first capacitor is connected to the first end of the second capacitor. The second end of the second capacitor is connected to one end of the DISNA thyristor. The other end of the third thyristor is connected to the anode of the second thyristor, the emitter of the first switching transistor, and ground. The cathode of the second thyristor is connected to the anode of the fourth diode and the anode of the second diode. The cathode of the fourth diode is connected to the anode of the third diode and the second end of the power supply port. The control end of the third thyristor is connected to the collector of the first switching transistor and the other end of the first resistor. The control end of the second thyristor is connected to the output end of the first inverter. The input end of the first inverter is connected to the base of the first switching transistor and the IO3 terminal of the first controller.

[0012] As a further embodiment of the present invention: the rectifier processing module further includes a first power transistor, a second power transistor, a third power transistor, a fifth diode, a sixth diode, a seventh diode, a ninth diode, a tenth diode, and a first thyristor;

[0013] Preferably, the drain of the first power transistor is connected to the cathode of the third diode, the source of the first power transistor is connected to the cathode of the ninth diode and the drain of the second power transistor, the source of the second power transistor is connected to the anode of the tenth diode and the drain of the third power transistor, the source of the third power transistor is connected to the cathode of the first thyristor and the anode of the fourth diode, the gate of the first power transistor is connected to the anode of the fifth diode and the IO1 terminal of the first controller, the cathode of the fifth diode is connected to the anode of the sixth diode and the cathode of the seventh diode, the cathode of the sixth diode is connected to the gate of the second power transistor, the anode of the seventh diode is connected to the gate of the third power transistor and the IO2 terminal of the first controller, the anode of the ninth diode is connected to the second terminal of the first capacitor and the cathode of the tenth diode, the anode of the first thyristor is connected to the second terminal of the second capacitor, and the control terminal of the first thyristor is connected to the IO3 terminal of the first controller.

[0014] As a further embodiment of the present invention: the first interface module includes a first interface, an eighth power transistor, and a ninth power transistor;

[0015] Preferably, the first end of the first interface is connected to the first end of the first capacitor, the second end of the first interface is connected to the drain of the eighth power transistor and the drain of the ninth power transistor, the source of the eighth power transistor is connected to the second end of the first capacitor, the source of the ninth power transistor is connected to the anode of the second thyristor, and the gate of the eighth power transistor and the gate of the ninth power transistor are respectively connected to the IO5 and IO6 terminals of the first controller.

[0016] As a further embodiment of the present invention: the rectifier module further includes a seventh power transistor; the energy storage module includes an eleventh diode, a fourth power transistor, a fifth power transistor, and an energy storage device;

[0017] Preferably, the cathode of the eleventh diode is connected to the second terminal of the second capacitor, the source of the fourth power transistor is connected to the anode of the eleventh diode, the drain of the fourth power transistor is connected to the anode of the eleventh diode, the drain of the fourth power transistor is connected to the first terminal of the energy storage device and the source of the fifth power transistor, the second terminal of the energy storage device is connected to the anode of the second thyristor, the drain of the fifth power transistor is connected to the drain of the seventh power transistor, the source of the seventh power transistor is connected to the second terminal of the first capacitor, and the gates of the fourth power transistor, the fifth power transistor, and the seventh power transistor are respectively connected to the IO3, IO7, and IO4 terminals of the first controller.

[0018] As a further embodiment of the present invention: the second interface module includes a sixth power transistor and a second interface;

[0019] Preferably, the drain of the sixth power transistor is connected to the drain of the seventh power transistor, the source of the sixth power transistor is connected to the first end of the second interface, and the second end of the second interface is connected to the anode of the second thyristor.

[0020] As a further embodiment of the present invention: the energy storage module further includes a second resistor, a third resistor, a first comparator, and a first reference power supply;

[0021] Preferably, one end of the second resistor is connected to the first end of the energy storage device, the other end of the second resistor is connected to the non-inverting input of the first comparator and connected to the second end of the energy storage device through the third resistor, the inverting input of the first comparator is connected to the first reference power supply, and the output of the first comparator is connected to the IO9 terminal of the first controller.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The multi-functional buck-boost control circuit of the rectifier of the present invention can be controlled by the microcontroller module to perform rectification processing by the rectification processing module. By controlling the switching transistor for high-frequency adjustment and controlling the upper half capacitor and the lower half capacitor to perform alternating dual-path energy storage and series power supply, voltage balance control is achieved to avoid voltage jumps. Furthermore, by changing the transmission path of the first interface module, boost power supply and buck power supply to the first interface module can be achieved. When buck power supply to the first interface module, the energy storage module can be controlled to store the electrical energy released by the lower half capacitor or the second interface module can be controlled to receive the electrical energy released by the lower half capacitor, thereby improving the energy utilization rate and enabling multi-path power supply. When further boost power supply is required, the energy storage module and the rectification processing module can be controlled to perform series boost power supply processing when the energy storage module is fully charged, thereby increasing the output voltage width. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic block diagram of a multi-functional buck-boost control circuit for a rectifier, provided as an embodiment of the present invention.

[0025] Figure 2 A circuit diagram of a multi-functional buck-boost control circuit for a rectifier provided in an embodiment of the present invention.

[0026] Figure 3 A circuit diagram of an energy storage module provided in an embodiment of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In one embodiment, see Figure 1 A multi-functional buck-boost control circuit for a rectifier, comprising:

[0029] The rectifier module 1, connected to the energy storage module 3, is used to rectify the incoming AC power. It controls the switching transistor to perform high-frequency regulation and controls the upper and lower half capacitors to perform alternating dual-path energy storage processing on the rectified power, providing the second and third power respectively. It discharges or transmits the rectified power stored in the upper and lower half capacitors in series and outputs the first power. When it is necessary to increase the output power voltage, it switches the power transmission path and connects the first power with the fourth power output from the energy storage module 3 in series to boost the voltage.

[0030] The first interface module 2 is connected to the rectifier processing module 1 and is used to switch the power transmission path and transmit the first power or the second power to the connected electrical equipment.

[0031] Energy storage module 3 is used to store third electrical energy. When the stored energy is greater than the set full charge threshold, it outputs a full charge signal, releases the stored electrical energy and outputs fourth electrical energy. When the switching transistor of rectifier processing module 1 fails, it transmits the fourth electrical energy to the lower half capacitor of rectifier processing module 1.

[0032] The second interface module 4 is connected to the rectifier processing module 1 and is used to transmit the third electrical energy to the connected electrical equipment.

[0033] The microcontroller module 5 is connected to the first interface module 2, the second interface module 4, the rectifier module 1, and the energy storage module 3. It is used to control the switching transistor of the rectifier module 1 to perform high-frequency adjustment, control the upper half capacitor and the lower half capacitor to perform alternating dual-path energy storage, control the first interface module 2 to receive the first electrical energy during boost rectification, control the rectifier module 1 to switch the power transmission path when a full-charge signal is received and further boost rectification is required, control the rectifier module 1 to switch the power transmission path, control the first interface module 2 to receive the second electrical energy and control the energy storage module 3 to receive the third electrical energy when the second interface module 4 needs to receive the third electrical energy, control the energy storage module 3 to stop receiving the third electrical energy, and control the energy storage module 3 to transfer the fourth electrical energy to the lower half capacitor of the rectifier module 1 when the switching transistor of the rectifier module 1 fails.

[0034] In a specific embodiment, the aforementioned rectification module 1 can employ a rectification circuit composed of inductors, diodes, field-effect transistors, and capacitors to rectify the incoming AC power. It controls the switching transistor for high-frequency regulation and alternating energy storage between the upper and lower half-capacitors. The upper and lower half-capacitors can respectively provide a second and a third electrical energy, with the second energy equal to the third energy. The upper and lower half-capacitors then discharge in series to output the first electrical energy, which can also be obtained after rectification. Furthermore, by switching the power transmission path, it can achieve series control with the energy storage module 3. The aforementioned first interface module 2 can employ a first interface circuit composed of a field-effect transistor and a load interface, which can connect to the power supply... The device connects to and changes the connection path with the rectifier processing module 1 to achieve boost or buck power supply; the energy storage module 3 can be an energy storage circuit composed of field-effect transistors, energy storage devices, comparators, resistors, etc., which can store and discharge energy, supply power in series with the rectifier processing module 1, and detect the full charge of the energy storage device through a set full charge threshold; the second interface module 4 can be a second interface circuit composed of a second interface and field-effect transistors, which can supply power to the connected electrical equipment; the microcontroller module 5 can be a microcontroller circuit composed of a single-chip microcomputer, which integrates many components such as an arithmetic unit, a controller, a memory, and input / output devices, and realizes functions such as signal processing, data storage, module control, and timing control.

[0035] In this embodiment, please refer to Figure 2 and Figure 3 The rectifier module 1 includes a power port, a first inductor L1, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, an eighth diode D8, a first capacitor C1, a second capacitor C2, a first resistor R1, a first switching transistor V1, a third thyristor S3, a first inverter INV1, and a second thyristor S2; the microcontroller module 5 includes a first controller U1;

[0036] Specifically, the first end of the power supply port is connected to the anode of the first diode D1 and the cathode of the second diode D2 through the first inductor L1. The cathode of the first diode D1 is connected to the cathode of the third diode D3 and the anode of the eighth diode D8. The cathode of the eighth diode D8 is connected to the first end of the first capacitor C1 and one end of the first resistor R1. The second end of the first capacitor C1 is connected to the first end of the second capacitor C2. The second end of the second capacitor C2 is connected to one end of the DISNA thyristor. The other end of the third thyristor S3 is connected to the anode of the second thyristor S2, the emitter of the first switching transistor V1, and ground. The cathode of the second thyristor S2 is connected to the anode of the fourth diode D4 and the anode of the second diode D2. The cathode of the fourth diode D4 is connected to the anode of the third diode D3 and the second end of the power supply port. The control end of the third thyristor S3 is connected to the collector of the first switching transistor V1 and the other end of the first resistor R1. The control end of the second thyristor S2 is connected to the output end of the first inverter INV1. The input end of the first inverter INV1 is connected to the base of the first switching transistor V1 and the IO3 terminal of the first controller U1.

[0037] In a specific embodiment, the first capacitor C1 and the second capacitor C2 are respectively used as the upper half capacitor and the lower half capacitor; the third thyristor S3 can be a bidirectional thyristor; the first switching transistor V1 can be an NPN transistor; the second thyristor S2 can be a unidirectional thyristor; the first inverter INV1 can be a NOT gate, and when the input of the first inverter INV1 is low, it triggers the second thyristor S2 to conduct, thereby controlling the first capacitor C1 and the second capacitor C2 to perform series energy storage and filtering; the first controller U1 can be an STM32 microcontroller.

[0038] Furthermore, the rectifier processing module 1 also includes a first power transistor Q1, a second power transistor Q2, a third power transistor Q3, a fifth diode D5, a sixth diode D6, a seventh diode D7, a ninth diode D9, a tenth diode D10, and a first thyristor S1;

[0039] Specifically, the drain of the first power transistor Q1 is connected to the cathode of the third diode D3, the source of the first power transistor Q1 is connected to the cathode of the ninth diode D9 and the drain of the second power transistor Q2, the source of the second power transistor Q2 is connected to the anode of the tenth diode D10 and the drain of the third power transistor Q3, the source of the third power transistor Q3 is connected to the cathode of the first thyristor S1 and the anode of the fourth diode D4, the gate of the first power transistor Q1 is connected to the anode of the fifth diode D5 and the IO1 terminal of the first controller U1, the cathode of the fifth diode D5 is connected to the anode of the sixth diode D6 and the cathode of the seventh diode D7, the cathode of the sixth diode D6 is connected to the gate of the second power transistor Q2, the anode of the seventh diode D7 is connected to the gate of the third power transistor Q3 and the IO2 terminal of the first controller U1, the anode of the ninth diode D9 is connected to the second terminal of the first capacitor C1 and the cathode of the tenth diode D10, the anode of the first thyristor S1 is connected to the second terminal of the second capacitor C2, and the control terminal of the first thyristor S1 is connected to the IO3 terminal of the first controller U1.

[0040] In a specific embodiment, the first power transistor Q1, the second power transistor Q2, and the third power transistor Q3 can all be N-channel field-effect transistors. When the first power transistor Q1 and the second power transistor Q2 are turned on, the second capacitor C2 is controlled to store energy. When the second power transistor Q2 and the third power transistor Q3 are turned on, the first capacitor C1 is controlled to store energy. The first thyristor S1 can be a unidirectional thyristor, which works with the second thyristor S2 to switch the power transmission path.

[0041] Furthermore, the first interface module 2 includes a first interface, an eighth power transistor Q8, and a ninth power transistor Q9;

[0042] Specifically, the first end of the first interface is connected to the first end of the first capacitor C1, the second end of the first interface is connected to the drain of the eighth power transistor Q8 and the drain of the ninth power transistor Q9, the source of the eighth power transistor Q8 is connected to the second end of the first capacitor C1, the source of the ninth power transistor Q9 is connected to the anode of the second thyristor S2, and the gate of the eighth power transistor Q8 and the gate of the ninth power transistor Q9 are respectively connected to the IO5 and IO6 terminals of the first controller U1.

[0043] In a specific embodiment, both the eighth power transistor Q8 and the ninth power transistor Q9 can be N-channel field-effect transistors. The eighth power transistor Q8 can control the first interface to form a circuit with the first capacitor C1, and the ninth power transistor Q9 can control the first interface to form a circuit with the first capacitor C1 and the second capacitor C2 in series.

[0044] Furthermore, the rectifier module 1 also includes a seventh power transistor Q7; the energy storage module 3 includes an eleventh diode D11, a fourth power transistor Q4, a fifth power transistor Q5, and an energy storage device;

[0045] Specifically, the cathode of the eleventh diode D11 is connected to the second terminal of the second capacitor C2, the source of the fourth power transistor Q4 is connected to the anode of the eleventh diode D11, the drain of the fourth power transistor Q4 is connected to the anode of the eleventh diode D11, the drain of the fourth power transistor Q4 is connected to the first terminal of the energy storage device and the source of the fifth power transistor Q5, the second terminal of the energy storage device is connected to the anode of the second thyristor S2, the drain of the fifth power transistor Q5 is connected to the drain of the seventh power transistor Q7, the source of the seventh power transistor Q7 is connected to the second terminal of the first capacitor C1, and the gates of the fourth power transistor Q4, the fifth power transistor Q5, and the seventh power transistor Q7 are respectively connected to the IO3, IO7, and IO4 terminals of the first controller U1.

[0046] In a specific embodiment, the seventh power transistor Q7, the fourth power transistor Q4, and the fifth power transistor Q5 can all be N-channel MOSFETs; the energy storage device can be a lithium battery.

[0047] Furthermore, the second interface module 4 includes a sixth power transistor Q6 and a second interface;

[0048] Specifically, the drain of the sixth power transistor Q6 is connected to the drain of the seventh power transistor Q7, the source of the sixth power transistor Q6 is connected to the first end of the second interface, and the second end of the second interface is connected to the anode of the second thyristor S2.

[0049] In a specific embodiment, the sixth power transistor Q6 can be an N-channel MOSFET.

[0050] Furthermore, the energy storage module 3 also includes a second resistor R2, a third resistor R3, a first comparator A1, and a first reference power supply VF1;

[0051] Specifically, one end of the second resistor R2 is connected to the first end of the energy storage device, the other end of the second resistor R2 is connected to the non-inverting input of the first comparator A1 and connected to the second end of the energy storage device through the third resistor R3, the inverting input of the first comparator A1 is connected to the first reference power supply VF1, and the output of the first comparator A1 is connected to the IO9 input of the first controller U1.

[0052] In a specific embodiment, the first comparator A1 can be an LM358 comparator; the first reference power supply VF1 can provide a full-charge threshold.

[0053] The working principle of a multi-functional step-up / step-down control circuit for a rectifier according to the present invention is as follows: AC power is connected to the power port. During normal step-up power supply, the IO6 terminal of the first controller U1 controls the ninth power transistor Q9 to conduct. In the first stage, the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 rectify the AC power. The first capacitor C1 and the second capacitor C2 store energy and filter it, providing the first power to the electrical equipment connected to the first interface. In the second stage, the IO1 and IO2 terminals of the first controller U1 control the first power transistor Q1, the second power transistor Q2, and the third power transistor Q3 to conduct. During the positive cycle, the power port, the first inductor L1, the first diode D1, and the fourth diode D4 cooperate with the first power... A circuit is formed by power transistors Q1, Q2, and Q3. During the negative cycle, the power supply port, first inductor L1, third diode D3, and second diode D2 work together with power transistors Q1, Q2, and Q3 to form a circuit. First inductor L1 stores AC energy and connects it in series with the incoming AC energy for boosting. In the third stage, the IO1 terminal of the first controller U1 controls the first power transistors Q1 and Q2 to conduct, thereby controlling the circuit formed by power transistors Q1, Q2, tenth diode D10, second capacitor C2, and third thyristor S3. This circuit provides power to the second capacitor C2 independently, allowing it to store and boost energy. Similarly, in the fourth stage, the IO2 terminal of the first controller U1 controls the second power transistor Q2 and the third power transistor Q3 to conduct, controlling the first capacitor C1 to store energy and provide the second power, thereby maintaining the voltage balance between the first capacitor C1 and the second capacitor C2, avoiding voltage jumps, reducing switching losses, and providing regulated power supply. Simultaneously, by alternately controlling the balanced energy storage of the first capacitor C1 and the second capacitor C2, power factor correction is performed. When further boosting of power supply is required and the energy storage device is fully charged, specifically, the second resistor R2 and the third resistor R3 sample the energy level of the energy storage device. When the sampled signal is greater than the full-charge threshold provided by the first reference power supply VF1, the output of the first comparator A1 is the first controller U1's... The IO9 pin provides a full-charge signal, and this full-charge threshold can be set according to the required discharge demand. The IO3 pin of the first controller U1 outputs a high level, controlling the first thyristor S1, the first switching transistor V1, and the fourth power transistor Q4 to conduct, while the second thyristor S2 and the third thyristor S3 are turned off. This allows the energy storage device to be connected in series with the second capacitor C2 and the first capacitor C1 through the fourth power transistor Q4 and the eleventh diode D11. At the same time, the first capacitor C1 and the second capacitor C2 still perform energy storage control by controlling the conduction state of the first power transistor Q1, the second power transistor Q2, and the third power transistor Q3. Consequently, the fourth electrical energy released by the energy storage device is superimposed with the electrical energy released in series by the first capacitor C1 and the second capacitor C2 to power the first interface. When a step-down power supply is required...The IO5 terminal of the first controller U1 can control the eighth power transistor Q8 to conduct, allowing the first interface to receive the second electrical energy released by the first capacitor C1. Simultaneously, the IO7 terminal of the first controller U1 controls the fifth power transistor Q5 to conduct, and the energy storage device stores the third electrical energy released by the second capacitor C2, transmitted by the seventh power transistor Q7. If multiple outputs are required, the IO8 terminal of the first controller U1 can control the sixth power transistor Q6 to conduct, so that the third electrical energy transmitted by the seventh power transistor Q7 can be transmitted to the electrical equipment connected to the second interface, improving energy utilization and enabling multiple power supplies. If the first power transistor Q1 experiences an open circuit fault, in the third stage of operation, the first capacitor C1 and the second capacitor C2 will directly store the rectified electrical energy. If the second power transistor Q2 experiences an open circuit fault, in the fourth stage of operation, the IO4 terminal of the first controller U1 can control the seventh power transistor Q7 to conduct, thereby controlling the energy storage device to provide power to the second capacitor C2, thus maintaining the voltage of the second capacitor C2 and maintaining the rectification operation.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-functional buck-boost control circuit for a rectifier, characterized in that, The circuit includes: The rectifier module, connected to the energy storage module, is used to rectify the incoming AC power. It controls the switching transistor to perform high-frequency regulation and controls the upper and lower half capacitors to perform alternating dual-path energy storage processing on the rectified power, providing the second and third power respectively. It discharges or transmits the rectified power stored in the upper and lower half capacitors in series and outputs the first power. When it is necessary to increase the output power voltage, it switches the power transmission path and connects the first power with the fourth power output from the energy storage module in series to boost the voltage. The first interface module is connected to the rectifier processing module and is used to switch the power transmission path and transmit the first power or the second power to the connected electrical equipment. The energy storage module is used to store the third electrical energy. When the stored electrical energy is greater than the set full charge threshold, it outputs a full charge signal, releases the stored electrical energy and outputs the fourth electrical energy. When the switching transistor of the rectifier module fails, the fourth electrical energy is transferred to the lower half capacitor of the rectifier module. The second interface module is connected to the rectifier module and is used to transmit the third electrical energy to the connected electrical equipment. The microcontroller module, connected to the first interface module, the second interface module, the rectifier module, and the energy storage module, is used to control the switching transistor of the rectifier module to perform high-frequency adjustment, control the upper half capacitor and the lower half capacitor to perform alternating dual-path energy storage, control the first interface module to receive the first electrical energy during boost rectification, control the rectifier module to switch the power transmission path when a full-charge signal is received and further boost rectification is required, control the rectifier module to receive the second electrical energy during buck rectification, control the first interface module to receive the second electrical energy and control the energy storage module to receive the third electrical energy, control the energy storage module to stop receiving the third electrical energy when the second interface module needs to receive the third electrical energy, and control the energy storage module to transfer the fourth electrical energy to the lower half capacitor of the rectifier module when the switching transistor of the rectifier module fails. The rectifier module includes a power port, a first inductor, a first diode, a second diode, a third diode, a fourth diode, an eighth diode, a first capacitor, a second capacitor, a first resistor, a first switching transistor, a third thyristor, a first inverter, and a second thyristor; the microcontroller module includes a first controller; the first capacitor and the second capacitor serve as the upper half capacitor and the lower half capacitor, respectively; The first end of the power port is connected to the anode of the first diode and the cathode of the second diode through the first inductor. The cathode of the first diode is connected to the cathode of the third diode and the anode of the eighth diode. The cathode of the eighth diode is connected to the first end of the first capacitor and one end of the first resistor. The second end of the first capacitor is connected to the first end of the second capacitor. The second end of the second capacitor is connected to one end of the third thyristor. The other end of the third thyristor is connected to the anode of the second thyristor, the emitter of the first switching transistor, and ground. The cathode of the second thyristor is connected to the anode of the fourth diode and the anode of the second diode. The cathode of the fourth diode is connected to the anode of the third diode and the second end of the power port. The control end of the third thyristor is connected to the collector of the first switching transistor and the other end of the first resistor. The control end of the second thyristor is connected to the output end of the first inverter. The input end of the first inverter is connected to the base of the first switching transistor and the IO3 terminal of the first controller.

2. The rectifier multi-functional buck-boost control circuit according to claim 1, characterized in that, The rectifier module further includes a first power transistor, a second power transistor, a third power transistor, a fifth diode, a sixth diode, a seventh diode, a ninth diode, a tenth diode, and a first thyristor; The drain of the first power transistor is connected to the cathode of the third diode, the source of the first power transistor is connected to the cathode of the ninth diode and the drain of the second power transistor, the source of the second power transistor is connected to the anode of the tenth diode and the drain of the third power transistor, the source of the third power transistor is connected to the cathode of the first thyristor and the anode of the fourth diode, the gate of the first power transistor is connected to the anode of the fifth diode and the IO1 terminal of the first controller, the cathode of the fifth diode is connected to the anode of the sixth diode and the cathode of the seventh diode, the cathode of the sixth diode is connected to the gate of the second power transistor, the anode of the seventh diode is connected to the gate of the third power transistor and the IO2 terminal of the first controller, the anode of the ninth diode is connected to the second terminal of the first capacitor and the cathode of the tenth diode, the anode of the first thyristor is connected to the second terminal of the second capacitor, and the control terminal of the first thyristor is connected to the IO3 terminal of the first controller.

3. The rectifier multi-functional buck-boost control circuit according to claim 2, characterized in that, The first interface module includes a first interface, an eighth power transistor, and a ninth power transistor; The first end of the first interface is connected to the first end of the first capacitor, the second end of the first interface is connected to the drain of the eighth power transistor and the drain of the ninth power transistor, the source of the eighth power transistor is connected to the second end of the first capacitor, the source of the ninth power transistor is connected to the anode of the second thyristor, and the gate of the eighth power transistor and the gate of the ninth power transistor are respectively connected to the IO5 and IO6 terminals of the first controller.

4. The rectifier multi-functional buck-boost control circuit according to claim 3, characterized in that, The rectifier module also includes a seventh power transistor; the energy storage module includes an eleventh diode, a fourth power transistor, a fifth power transistor, and an energy storage device. The cathode of the eleventh diode is connected to the second terminal of the second capacitor, the source of the fourth power transistor is connected to the anode of the eleventh diode, the drain of the fourth power transistor is connected to the first terminal of the energy storage device and the source of the fifth power transistor, the second terminal of the energy storage device is connected to the anode of the second thyristor, the drain of the fifth power transistor is connected to the drain of the seventh power transistor, the source of the seventh power transistor is connected to the second terminal of the first capacitor, and the gates of the fourth power transistor, the fifth power transistor, and the seventh power transistor are respectively connected to the IO3, IO7, and IO4 terminals of the first controller.

5. The rectifier multi-functional buck-boost control circuit according to claim 4, characterized in that, The second interface module includes a sixth power transistor and a second interface; The drain of the sixth power transistor is connected to the drain of the seventh power transistor, the source of the sixth power transistor is connected to the first end of the second interface, the second end of the second interface is connected to the anode of the second thyristor, and the gate of the sixth power transistor is connected to the IO8 terminal of the first controller.

6. The rectifier multi-functional buck-boost control circuit according to claim 5, characterized in that, The energy storage module also includes a second resistor, a third resistor, a first comparator, and a first reference power supply; One end of the second resistor is connected to the first end of the energy storage device, and the other end of the second resistor is connected to the non-inverting input of the first comparator and connected to the second end of the energy storage device through the third resistor. The inverting input of the first comparator is connected to the first reference power supply, and the output of the first comparator is connected to the IO9 input of the first controller.

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