Rectifier multifunctional buck-boost control circuit

Abstract

The invention discloses a multifunctional buck-boost control circuit of a rectifier, which relates to the technical field of rectification control, and comprises a micro-control module for controlling a rectification processing module to carry out rectification processing, carrying out high-frequency adjustment by controlling a switch tube and controlling an upper half capacitor and a lower half capacitor to carry out alternate double-path energy storage and series power supply, in addition, boost power supply and buck power supply for the first interface module can be realized by changing a transmission path of the first interface module, and during buck power supply for the first interface module, the energy storage module can be controlled to store the electric energy released by the lower half capacitor or the second interface module can be controlled to receive the electric energy released by the lower half capacitor. When further boost power supply is needed, the energy storage module and the rectification processing module can be controlled to carry out series boost power supply processing when the energy storage module is fully charged. The multifunctional buck-boost control circuit of the rectifier can realize voltage balance control, avoids voltage jump, improves the utilization rate of electric energy, can perform multi-path power supply, and increases the width of output voltage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rectification control, and particularly relates to a multifunctional step-up and step-down control circuit of a rectifier. BACKGROUND

[0002] At present, rectifiers are widely used in chargers, charging piles, direct current power transmission systems and the like. In order to improve the flexibility and control accuracy of the rectifier, a silicon controlled rectifier composed of switching devices is used for power regulation and rectification processing. In order to perform step-up or step-down processing on the rectified power, a Bust or Boost circuit is used for implementation. However, the structure of the Bust or Boost circuit has high loss and low power supply continuity. When a fault occurs, the power supply state cannot be continuously maintained, and thus needs to be improved. SUMMARY

[0003] The present application provides a multifunctional step-up and step-down control circuit of a rectifier to solve the problems in the background art.

[0004] According to the present application, a multifunctional step-up and step-down control circuit of a rectifier is provided, which comprises: a rectification processing module connected with an energy storage module, configured to rectify the input alternating current power, perform high-frequency regulation by controlling a switching tube, and control the upper half capacitor and the lower half capacitor to alternately store the rectified power in two paths, respectively provide second power and third power, discharge the power stored in the upper half capacitor and the lower half capacitor in series, or transmit the rectified power and output first power, and when it is necessary to increase the voltage of the output power, switch the power transmission path and perform series step-up of the first power and fourth power output by the energy storage module; a first interface module connected with the rectification processing module, configured to switch the power transmission path and transmit the first power or the second power to a connected power consumption device; the energy storage module, configured to store the third power, output a full power signal when the stored energy is greater than a set full power threshold, release the stored power and output fourth power, and transmit the fourth power to the lower half capacitor of the rectification processing module when a fault occurs in the switching tube of the rectification processing module; a second interface module connected with the rectification processing module, configured to transmit the third power to a connected power consumption device; The micro-control module is connected with the first interface module, the second interface module, the rectification processing module and the energy storage module, and is used for controlling the switching tube of the rectification processing module to perform high-frequency regulation, controlling the upper half capacitor and the lower half capacitor to perform alternating dual-path energy storage, controlling the first interface module to receive the first electric energy when performing boost rectification, controlling the rectification processing module to switch the electric energy transmission path when receiving the full power signal and further boost rectification is needed, controlling the first interface module to receive the second electric energy and controlling the energy storage module to receive the third electric energy when performing buck rectification, controlling the energy storage module to stop receiving the third electric energy when the second interface module needs to receive the third electric energy, and controlling the energy storage module to transmit the fourth electric energy to the lower half capacitor of the rectification processing module when the switching tube of the rectification processing module fails.

[0005] As a further scheme of the present application: the rectification processing module comprises 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 tube, a third thyristor, a first inverter and a second thyristor; the micro-control module comprises a first controller; Preferably, the first end of the power port is connected with 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 with the cathode of the third diode and the anode of the eighth diode, the cathode of the eighth diode is connected with the first end of the first capacitor and one end of the first resistor, the second end of the first capacitor is connected with the first end of the second capacitor, the second end of the second capacitor is connected with one end of the Disney thyristor, the other end of the third thyristor is connected with the anode of the second thyristor, the emitter of the first switching tube and the ground end, the cathode of the second thyristor is connected with the anode of the fourth diode and the anode of the second diode, the cathode of the fourth diode is connected with the anode of the third diode and the second end of the power port, the control end of the third thyristor is connected with the collector of the first switching tube and the other end of the first resistor, the control end of the second thyristor is connected with the output end of the first inverter, and the input end of the first inverter is connected with the base of the first switching tube and the IO3 end of the first controller.

[0006] As a further scheme of the present application: the rectification processing module further comprises a first power tube, a second power tube, a third power tube, a fifth diode, a sixth diode, a seventh diode, a ninth diode, a twelfth diode and a first thyristor; Preferably, the drain of the first power tube is connected to the cathode of the third diode, the source of the first power tube is connected to the cathode of the ninth diode and the drain of the second power tube, the source of the second power tube is connected to the anode of the twelfth diode and the drain of the third power tube, the source of the third power tube is connected to the cathode of the first thyristor and the anode of the fourth diode, the gate of the first power tube 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 tube, the anode of the seventh diode is connected to the gate of the third power tube 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 twelfth 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. As a further scheme of the present application, the first interface module comprises a first interface, an eighth power tube and a ninth power tube. Preferably, the first terminal of the first interface is connected to the first terminal of the first capacitor, the second terminal of the first interface is connected to the drain of the eighth power tube and the drain of the ninth power tube, the source of the eighth power tube is connected to the second terminal of the first capacitor, the source of the ninth power tube is connected to the anode of the second thyristor, and the gate of the eighth power tube and the gate of the ninth power tube are respectively connected to the IO5 terminal and the IO6 terminal of the first controller.

[0007] As a further scheme of the present application, the rectification processing module further comprises a seventh power tube, and the energy storage module comprises an eleventh diode, a fourth power tube, a fifth power tube and an energy storage device. Preferably, the cathode of the eleventh diode is connected to the second terminal of the second capacitor, the source of the fourth power tube is connected to the anode of the eleventh diode, the drain of the fourth power tube is connected to the anode of the eleventh diode, the drain of the fourth power tube is connected to the first terminal of the energy storage device and the source of the fifth power tube, the second terminal of the energy storage device is connected to the anode of the second thyristor, the drain of the fifth power tube is connected to the drain of the seventh power tube, the source of the seventh power tube is connected to the second terminal of the first capacitor, and the gate of the fourth power tube, the gate of the fifth power tube and the gate of the seventh power tube are respectively connected to the IO3 terminal, the IO7 terminal and the IO4 terminal of the first controller.

[0008] As a further scheme of the present application, the second interface module comprises a sixth power tube and a second interface. Preferably, the drain of the sixth power tube is connected to the drain of the seventh power tube, the source of the sixth power tube is connected to the first terminal of the second interface, and the second terminal of the second interface is connected to the anode of the second thyristor.

[0009] As a further scheme of the present application, the energy storage module further comprises a second resistor, a third resistor, a first comparator and a first reference power supply. 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 terminal of the first comparator and connected to the second end of the energy storage device through the third resistor, the inverting terminal of the first comparator is connected to the first reference power supply, and the output terminal of the first comparator is connected to the IO9 terminal of the first controller.

[0010] Compared with the prior art, the rectifier multifunctional step-up and step-down control circuit has the advantages that the rectifier multifunctional step-up and step-down control circuit can control the rectification processing module to perform rectification processing by the micro control module, control the switching tube to perform high-frequency regulation, and control the upper half capacitor and the lower half capacitor to perform alternating dual-path energy storage and series power supply, so that voltage equalization control is realized, voltage jump is avoided, the first interface module can be supplied with power in a step-up mode or a step-down mode by changing the transmission path of the first interface module, the energy storage module can be controlled to store the electric energy released by the lower half capacitor or the second interface module can be controlled to receive the electric energy released by the lower half capacitor when the first interface module is supplied with power in a step-down mode, the energy utilization rate is improved, multi-path power supply can be performed, and the output voltage width is increased when further step-up power supply is required. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 A principle block diagram of a rectifier multifunctional step-up and step-down control circuit is provided for the embodiments of the present application.

[0013] Figure 2 A circuit diagram of a rectifier multifunctional step-up and step-down control circuit is provided for the embodiments of the present application.

[0014] Figure 3 A circuit diagram of an energy storage module is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0015] The technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0016] In one embodiment, please refer to Figure 1The utility model relates to a rectifier multifunctional step-up and step-down control circuit, comprising: The rectification processing module 1 is connected with the energy storage module 3, is used for carrying out rectification to the alternating current energy of access, carries out high frequency regulation through the control switch tube and controls the upper half capacitor and the lower half capacitor to carry out the alternate double -way energy storage processing to the energy after rectification, provides the second electric energy and the third electric energy respectively, carries out series discharge to the electric energy of the upper half capacitor and the lower half capacitor or transmission rectification after energy and exports the first electric energy, when needing to improve the voltage of the electric energy output, switch the electric energy transmission path and carry out series step-up to the first electric energy and the fourth electric energy of the energy storage module 3 output, The first interface module 2 is connected with the rectification processing module 1, is used for switching the electric energy transmission path and transmitting the first electric energy or the second electric energy to the connected electric equipment; The energy storage module 3 is used for storing the third electric energy, when the energy storage of storage is greater than the full electric threshold value set, exports the full electric signal, releases the electric energy of storage and exports the fourth electric energy, when the switch tube of rectification processing module 1 fails, the fourth electric energy is transmitted to the lower half capacitor of rectification processing module 1; The second interface module 4 is connected with the rectification processing module 1, is used for transmitting the third electric energy to the connected electric equipment; The micro control module 5 is connected with the first interface module 2, the second interface module 4, the rectification processing module 1 and the energy storage module 3, is used for controlling the switch tube of rectification processing module 1 to carry out high frequency regulation, controls the upper half capacitor and the lower half capacitor to carry out the alternate double -way energy storage, when carrying out step-up rectification, control the first interface module 2 receives the first electric energy, when receiving the full electric signal and needing to further carry out step-up rectification, control rectification processing module 1 switches the electric energy transmission path, when carrying out step-down rectification, control the first interface module 2 receives the second electric energy and control energy storage module 3 receives the third electric energy, need control the second interface module 4 receives the third electric energy, control energy storage module 3 stops receiving the third electric energy, when the switch tube of rectification processing module 1 fails, control energy storage module 3 to transmit the fourth electric energy to the lower half capacitor of rectification processing module 1.

[0017] In specific embodiments, the rectification processing module 1 described above can adopt a rectification processing circuit composed of inductors, diodes, field effect tubes, capacitors, etc. It can rectify the alternating current energy accessed, adjust the frequency through the control of the switch tube, and control the upper half capacitor and the lower half capacitor to alternately store energy. The upper half capacitor and the lower half capacitor can provide the second electric energy and the third electric energy respectively. The second electric energy is equal to the third electric energy. The first electric energy can be outputted by the series connection of the upper half capacitor and the lower half capacitor. The first electric energy can also be obtained after the rectification processing. The transmission path of the electric energy can be switched to complete the series connection control with the energy storage module 3. The first interface module 2 described above can adopt a first interface circuit composed of field effect tubes and load interfaces. It can be connected with the electric equipment and realize the step-up power supply or step-down power supply by changing the connection path with the rectification processing module 1. The energy storage module 3 described above can adopt an energy storage circuit composed of field effect tubes, energy storage devices, comparators, resistors, etc. It can store energy and discharge, and supply power in series with the rectification processing module 1. The full charge threshold value is set to detect the full charge of the energy storage device. The second interface module 4 described above can adopt a second interface circuit composed of the second interface and the field effect tube. It can supply power for the connected electric equipment. The micro control module 5 described above can adopt a micro control circuit composed of a single-chip microcomputer. It integrates many components such as the arithmetic unit, the controller, the memory, and the input and output unit, and realizes the functions of signal processing, data storage, module control, timing control, etc.

[0018] In the embodiment, please refer to Figure 2 and Figure 3 The rectification processing module 1 includes the power port, the first inductor L1, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the eighth diode D8, the first capacitor C1, the second capacitor C2, the first resistor R1, the first switch tube V1, the third silicon controlled rectifier S3, the first inverter INV1, and the second silicon controlled rectifier S2. The micro control module 5 includes the first controller U1. Specifically, the first end of the power port is connected with 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 with the cathode of the third diode D3 and the anode of the eighth diode D8, the cathode of the eighth diode D8 is connected with 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 with the first end of the second capacitor C2, the second end of the second capacitor C2 is connected with one end of the thyristor, the other end of the third thyristor S3 is connected with the anode of the second thyristor S2, the emitter of the first switch tube V1 and the ground, the cathode of the second thyristor S2 is connected with the anode of the fourth diode D4 and the anode of the second diode D2, the cathode of the fourth diode D4 is connected with the anode of the third diode D3 and the second end of the power port, the control end of the third thyristor S3 is connected with the collector of the first switch tube V1 and the other end of the first resistor R1, the control end of the second thyristor S2 is connected with the output end of the first inverter INV1, the input end of the first inverter INV1 is connected with the base of the first switch tube V1 and the IO3 end of the first controller U1.

[0019] In specific embodiments, the first capacitor C1 and the second capacitor C2 are respectively used as upper and lower half capacitors, the third thyristor S3 can be a bidirectional thyristor, the first switch tube V1 can be an NPN triode, the second thyristor S2 can be a unidirectional thyristor, the first inverter INV1 can be a non-inverter, when the input end of the first inverter INV1 is at a low level, the second thyristor S2 is triggered to be turned on, and then the first capacitor C1 and the second capacitor C2 are controlled to be in series for energy storage and filtering, and the first controller U1 can be an STM32 single-chip microcomputer.

[0020] Further, the rectification processing module 1 further comprises a first power tube Q1, a second power tube Q2, a third power tube Q3, a fifth diode D5, a sixth diode D6, a seventh diode D7, a ninth diode D9, a twelfth diode D10 and a first thyristor S1. Specifically, the drain of the first power tube Q1 is connected to the cathode of the third diode D3, the source of the first power tube Q1 is connected to the cathode of the ninth diode D9 and the drain of the second power tube Q2, the source of the second power tube Q2 is connected to the anode of the twelfth diode D10 and the drain of the third power tube Q3, the source of the third power tube 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 tube 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 tube Q2, the anode of the seventh diode D7 is connected to the gate of the third power tube 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 twelfth 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.

[0021] In specific embodiments, the first power tube Q1, the second power tube Q2 and the third power tube Q3 can all be N-channel field effect tubes, wherein the first power tube Q1 and the second power tube Q2 are turned on to control the energy storage of the second capacitor C2, and the second power tube Q2 and the third power tube Q3 are turned on to control the energy storage of the first capacitor C1; the first thyristor S1 can be a unidirectional thyristor, which cooperates with the second thyristor S2 to switch the power transmission path.

[0022] Further, the first interface module 2 comprises a first interface, an eighth power tube Q8 and a ninth power tube Q9. Specifically, the first terminal of the first interface is connected to the first terminal of the first capacitor C1, the second terminal of the first interface is connected to the drain of the eighth power tube Q8 and the drain of the ninth power tube Q9, the source of the eighth power tube Q8 is connected to the second terminal of the first capacitor C1, the source of the ninth power tube Q9 is connected to the anode of the second thyristor S2, and the gate of the eighth power tube Q8 and the gate of the ninth power tube Q9 are respectively connected to the IO5 terminal and the IO6 terminal of the first controller U1.

[0023] In specific embodiments, the eighth power tube Q8 and the ninth power tube Q9 can all be N-channel field effect tubes, the eighth power tube Q8 can control the first interface and the first capacitor C1 to form a loop, and the ninth power tube Q9 can control the first interface and the first capacitor C1 and the second capacitor C2 in series to form a loop.

[0024] Further, the rectification processing module 1 further comprises a seventh power tube Q7, and the energy storage module 3 comprises an eleventh diode D11, a fourth power tube Q4, a fifth power tube Q5 and an energy storage device. Specifically, the cathode of the eleventh diode D11 is connected to the second end of the second capacitor C2, the anode of the eleventh diode D11 is connected to the source of the fourth power tube Q4, the drain of the fourth power tube Q4 is connected to the anode of the eleventh diode D11, the drain of the fourth power tube Q4 is connected to the first end of the energy storage device and the source of the fifth power tube Q5, the second end of the energy storage device is connected to the anode of the second thyristor S2, the drain of the fifth power tube Q5 is connected to the drain of the seventh power tube Q7, the source of the seventh power tube Q7 is connected to the second end of the first capacitor C1, and the gate of the fourth power tube Q4, the gate of the fifth power tube Q5 and the gate of the seventh power tube Q7 are respectively connected to the IO3 terminal, the IO7 terminal and the IO4 terminal of the first controller U1.

[0025] In specific embodiments, the seventh power tube Q7, the fourth power tube Q4 and the fifth power tube Q5 can be N-channel field effect tubes.

[0026] Further, the second interface module 4 comprises a sixth power tube Q6 and a second interface; Specifically, the drain of the sixth power tube Q6 is connected to the drain of the seventh power tube Q7, the source of the sixth power tube 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.

[0027] In specific embodiments, the sixth power tube Q6 can be an N-channel field effect tube.

[0028] Further, the energy storage module 3 further comprises a second resistor R2, a third resistor R3, a first comparator A1 and a first reference power supply VF1. 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 terminal of the first comparator A1 and connected to the second end of the energy storage device through the third resistor R3, the inverting terminal of the first comparator A1 is connected to the first reference power supply VF1, and the output terminal of the first comparator A1 is connected to the IO9 terminal of the first controller U1.

[0029] In specific embodiments, the first comparator A1 can be an LM358 comparator, and the first reference power supply VF1 can provide a full power threshold.

[0030] The working principle of the rectifier multifunctional step-up and step-down control circuit is as follows: AC power is connected to the power port, when normal step-up power supply, IO6 end of the first controller U1 controls the ninth power tube Q9 to be turned on, 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 and provide the first power for the power equipment connected to the first interface, in the second stage, IO1 end and IO2 end of the first controller U1 control the first power tube Q1, the second power tube Q2 and the third power tube Q3 to be turned on, in the positive cycle, the power port, the first inductor L1, the first diode D1 and the fourth diode D4 cooperate with the first power tube Q1, the second power tube Q2 and the third power tube Q3 to form a loop, in the negative cycle, the power port, the first inductor L1, the third diode D3 and the second diode D2 cooperate with the first power tube Q1, the second power tube Q2 and the third power tube Q3 to form a loop, the first inductor L1 stores AC power, the first inductor L1 supplies power in series with the stored power and the connected AC power, and then supplies power in step-up, in the third stage, IO1 end of the first controller U1 controls the first power tube Q1 and the second power tube Q2 to be turned on, and then controls the first power tube Q1, the second power tube Q2, the twelfth diode D10, the second capacitor C2, the third thyristor S3 and the like to form a loop, to supply power to the second capacitor C2 alone and store energy and provide the third power for the second capacitor C2, in the same way, in the fourth stage, IO2 end of the first controller U1 controls the second power tube Q2 and the third power tube Q3 to be turned on, controls the first capacitor C1 to store energy and provide the second power, and then maintains the voltage balance of the first capacitor C1 and the second capacitor C2, avoids voltage jump, reduces switching loss, and supplies power in voltage stabilization, at the same time, through the alternate control of the balanced energy storage work of the first capacitor C1 and the second capacitor C2, power factor correction processing is carried out, when further step-up power supply is needed and the energy storage device is full, specifically, the second resistor R2 and the third resistor R3 sample the electric quantity of the energy storage device, when the sampled signal is greater than the full power threshold provided by the first reference power VF1, the output end of the first comparator A1 provides the full power signal to the IO9 end of the first controller U1, the full power threshold can be set according to the required discharge demand, the IO3 end of the first controller U1 outputs high level, controls the first thyristor S1, the first switch tube V1 and the fourth power tube Q4 to be turned on, the second thyristor S2 and the third thyristor S3 are cut off, so that the energy storage device is connected in series with the second capacitor C2 and the first capacitor C1 through the fourth power tube Q4 and the eleventh diode D11, at the same time, the first capacitor C1 and the second capacitor C2 still store energy through the control of the turned-on state of the first power tube Q1, the second power tube Q2 and the third power tube Q3, and then the fourth power released by the energy storage device is superimposed with the power released by the first capacitor C1 and the second capacitor C2 in series and supplies power to the first interface, when step-down power supply is needed,The IO5 end of the first controller U1 can control the eighth power tube Q8 to be turned on, so that the first interface receives the second electric energy released by the first capacitor C1, while the IO7 end of the first controller U1 controls the fifth power tube Q5 to be turned on, and the energy storage device stores the third electric energy released by the second capacitor C2 transmitted by the seventh power tube Q7, if multiple outputs are needed at this time, the IO8 end of the first controller U1 can control the sixth power tube Q6 to be turned on, so as to transmit the third electric energy transmitted by the seventh power tube Q7 to the electric equipment connected to the second interface, improve the utilization rate of electric energy and can carry out multiple power supply, if the first power tube Q1 appears open circuit fault, in the third stage work, the first capacitor C1 and the second capacitor C2 will directly store the rectified electric energy, if the second power tube Q2 appears open circuit fault, in the fourth stage work, the IO4 end of the first controller U1 can control the seventh power tube Q7 to be turned on, and then control the energy storage device to provide electric energy for the second capacitor C2, and then maintain the voltage of the second capacitor C2, maintain the rectification work.

[0031] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to include all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved. In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

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 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 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.

2. The rectifier multi-functional buck-boost control circuit according to claim 1, characterized in that, 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 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 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 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.

3. The rectifier multi-functional buck-boost control circuit according to claim 2, 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.

4. The rectifier multi-functional buck-boost control circuit according to claim 3, 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.

5. The rectifier multi-functional buck-boost control circuit according to claim 4, 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 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. 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.

6. The rectifier multi-functional buck-boost control circuit according to claim 5, 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, and the second end of the second interface is connected to the anode of the second thyristor.

7. A multi-functional buck-boost control circuit for a rectifier 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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