A power supply intelligent control circuit of a low voltage electrical apparatus

Abstract

The application discloses a power intelligent control circuit of a low-voltage electric appliance, and relates to the technical field of low-voltage electric appliances, which comprises a micro-control module, provides two groups of drive signals with equal duty cycles and complementary phases, controls a first power module to periodically control a resonance network and a capacitor voltage to be clamped and stacked, adjusts and processes power of direct-current electric energy, and supplies power for connected low-voltage devices; when the first power module periodically works and does not process voltage of the direct-current electric energy, the drive control module controls an energy storage module to perform energy storage work; if multiple power supply is needed, the second power module and the first power module are controlled to alternately receive direct-current electric energy and periodically perform power adjustment work; and when a power module is powered off, the energy storage module can be controlled to perform standby power supply. The power intelligent control circuit of the low-voltage electric appliance can reduce the size of a converter, reduce inductor loss, improve power supply efficiency for low-voltage devices, and realize uninterrupted power supply control.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliance technology, specifically to a power intelligent control circuit for low-voltage electrical appliances. Background Technology

[0002] Currently, to meet the power demands of low-voltage electrical appliances, inductor-based DC-DC converters, such as Buck converters and Boost converters, are generally used to form the power control circuits for these appliances. These circuits primarily use switching transistors to control relatively large inductors to transfer energy, thereby achieving DC-DC regulation. However, this increases the size of the DC-DC converter, and the losses in the inductor's core and coil increase the total converter losses. Furthermore, when supplying power to multiple circuits, this type of DC-DC converter cannot intelligently control its power supply status based on whether it is a single or multiple power supply, leading to reduced power supply efficiency. Therefore, improvements are needed. Summary of the Invention

[0003] This invention provides a power intelligent control circuit for low-voltage electrical appliances to solve the problems mentioned in the background art.

[0004] According to an embodiment of the present invention, a power intelligent control circuit for a low-voltage electrical appliance is provided, comprising: The power module is used to connect to DC power. The first power module, connected to the power supply module, is used to periodically control the resonant network and capacitor voltage to clamp and stack voltage, perform DC-DC regulation on DC power and output the first power to power the connected low-voltage equipment. The microcontroller module, connected to the first power module, the second power module, the drive control module, and the energy storage module, provides two sets of first and second drive signals with equal duty cycles and complementary phases, and controls the first and second power modules to alternately receive DC power and perform periodic power regulation. When the second power module is connected to low-voltage equipment, it outputs a discharge signal and changes the signal transmission path of the drive control module. When the second power module is not connected to low-voltage equipment and it is necessary to expand the voltage range output by the first power module, it outputs a compensation signal and a discharge signal. When the power module is powered off, it outputs a power supply signal and controls the energy storage module to discharge. The drive control module is connected to the energy storage module and the second power module. When no discharge signal and the first drive signal are received, it provides an energy storage signal to the energy storage module. When a discharge signal is received, it transmits the first drive signal and the second drive signal to the second power module. The second power module, connected to the first power module and the power supply module, is used to periodically control the resonant network and capacitor voltage to clamp and stack voltage when receiving the second drive signal and the second drive signal, to perform DC-DC regulation on the DC power and output the second power to power the connected low-voltage equipment. When receiving the compensation signal, the first power and the second power are superimposed and used to power the low-voltage equipment connected to the first power module. The energy storage module, connected to the power supply module, is used to store DC power when receiving an energy storage signal and to provide DC power in place of the power supply module when receiving a power supply signal.

[0005] As a further embodiment of the present invention: the power supply module includes a power port, a first capacitor, a first diode, and a sixth diode; the first power module includes a first power transistor, a second capacitor, a first inductor, a second diode, and a fifth power transistor; the microcontroller module includes a first controller; Preferably, the first end of the power supply port is connected to the anode of the first diode and the anode of the sixth diode, and is connected to the second end of the power supply port, the source of the fifth power transistor, and the ground through the first capacitor. The cathode of the first diode is connected to the drain of the first power transistor, the source of the first power transistor is connected to the positive terminal of the second capacitor, the negative terminal of the second capacitor is connected to the anode of the second diode and the drain of the fifth power transistor through the first inductor, and the gate of the first power transistor and the gate of the fifth power transistor are respectively connected to the IO1 and IO2 terminals of the first controller.

[0006] As a further embodiment of the present invention: the first power module further includes a second power transistor, a third capacitor, a sixth power transistor, and a third diode; Preferably, the drain of the second power transistor is connected to the source of the first power transistor, the source of the second power transistor is connected to the positive terminal of the third capacitor, the negative terminal of the third capacitor is connected to the anode of the third diode and the drain of the sixth power transistor, the source of the sixth power transistor is connected to the second terminal of the power supply port, and the gates of the second power transistor and the sixth power transistor are respectively connected to the IO2 and IO1 terminals of the first controller.

[0007] As a further embodiment of the present invention: the first power module includes a third power transistor, a fourth capacitor, a seventh power transistor, a fourth diode, a fifth diode, a fifth capacitor, an eighth diode, and a first device interface; Preferably, the drain of the third power transistor is connected to the source of the second power transistor, the source of the third power transistor is connected to the drain of the fourth power transistor and the positive terminal of the fourth capacitor, the negative terminal of the fourth capacitor is connected to the drain of the seventh power transistor and the anode of the fourth diode through the second inductor, the cathode of the fourth diode is connected to the cathode of the third diode, the cathode of the second diode and the anode of the fifth diode, the source of the fourth power transistor is connected to the cathode of the fifth diode and the anode of the eighth diode and is connected to the source of the seventh power transistor, the second terminal of the first device interface and the second terminal of the power supply port through the fifth capacitor, the cathode of the eighth diode is connected to the first terminal of the first device interface, the gate of the third power transistor is connected to the IO1 terminal of the first controller, and the gates of the seventh power transistor and the fourth power transistor are both connected to the IO2 terminal of the first controller.

[0008] As a further embodiment of the present invention: the energy storage module includes an eighth power transistor, a ninth power transistor, and an energy storage device; Preferably, the drain of the eighth power transistor is connected to the first terminal of the power supply port, the source of the eighth power transistor is connected to the source of the ninth power transistor, the drain of the ninth power transistor is connected to the first terminal of the energy storage device, the second terminal of the energy storage device is grounded, the gate of the ninth power transistor is connected to the IO3 terminal of the first controller, and the gate of the eighth power transistor is connected to the drive control module.

[0009] As a further embodiment of the present invention: the drive control module further includes a first inverter, a second inverter, and a first analog switch; Preferably, the input terminal of the first inverter is connected to the eighth terminal of the first analog switch and the IO1 terminal of the first controller; the output terminal of the first inverter is connected to the third terminal of the first analog switch; the fourth terminal of the first analog switch is connected to the gate of the eighth power transistor; the first terminal of the first analog switch is connected to the IO2 terminal of the first controller; the sixth and thirteenth terminals of the first analog switch are connected to the input terminal of the second inverter and the IO5 terminal of the first controller; the output terminal of the second inverter is connected to the fifth terminal of the first analog switch; and the ninth and second terminals of the first analog switch are connected to the second power module.

[0010] As a further embodiment of the present invention: the second power module includes a power adjustment device, a sixth capacitor, a second device interface, a tenth power transistor, a seventh capacitor, and a seventh diode; Preferably, the input terminal of the power adjustment device is connected to the cathode of the sixth diode, the first driving terminal and the second driving terminal of the power adjustment device are respectively connected to the ninth terminal and the second terminal of the first analog switch, the output terminal of the power adjustment device is connected to the drain of the tenth power transistor and the first terminal of the second device interface, and is connected to the second terminal of the second device interface, the ground terminal and the ground terminal of the power adjustment module through the sixth capacitor, the source of the tenth power transistor is connected to the anode of the seventh diode and the positive terminal of the seventh capacitor, the negative terminal of the seventh capacitor is connected to the anode of the eighth diode, the cathode of the seventh diode is connected to the first terminal of the first device interface, and the gate of the tenth power transistor is connected to the IO4 terminal of the first controller.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The intelligent power control circuit of the low-voltage electrical appliance of the present invention can be provided by a micro-control module with two sets of drive signals with equal duty cycles and complementary phases, and control the first power module to periodically control the resonant network and capacitor voltage to clamp and stack voltage, perform DC-DC regulation processing on DC power and supply power to the connected low-voltage equipment, reduce the size of the converter and reduce inductor losses. At the same time, when the first power module is working periodically and not performing voltage processing on DC power, the drive control module controls the energy storage module to perform energy storage. If multiple power supplies are required, the second power module and the first power module will be controlled to alternately receive DC power and perform periodic power regulation, thereby improving the power supply efficiency to low-voltage equipment. When the power module is powered off, the energy storage module can be controlled to provide backup power, thereby achieving uninterrupted power supply control. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic block diagram of the power intelligent control circuit for a low-voltage electrical appliance provided in an embodiment of the present invention.

[0014] Figure 2 This is a circuit diagram of a power intelligent control circuit for a low-voltage electrical appliance, provided as an embodiment of the present invention.

[0015] Figure 3 The circuit diagram of the drive control module provided in the embodiment of the present invention.

[0016] Figure 4 The circuit diagram of the second power module provided in the embodiment of the present invention. Detailed Implementation

[0017] 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.

[0018] In one embodiment, see Figure 1 A power supply intelligent control circuit for low-voltage electrical appliances, comprising: Power module 1 is used to connect to DC power. The first power module 2 is connected to the power supply module 1 and is used to periodically control the resonant network and capacitor voltage to clamp and stack voltage, perform DC-DC regulation on DC power and output the first power to power the connected low-voltage equipment. The microcontroller module 3 is connected to the first power module 2, the second power module 5, the drive control module 4, and the energy storage module 6. It is used to provide two sets of first drive signals and second drive signals with equal duty cycles and complementary phases, and to control the first power module 2 and the second power module 5 to alternately receive DC power and perform periodic power regulation. When the second power module 5 is connected to low-voltage equipment, it outputs a discharge signal and changes the signal transmission path of the drive control module 4. When the second power module 5 is not connected to low-voltage equipment and it is necessary to expand the voltage range output by the first power module 2, it outputs a compensation signal and a discharge signal. When the power supply module 1 is powered off, it outputs a power supply signal and controls the energy storage module 6 to discharge. The drive control module 4 is connected to the energy storage module 6 and the second power module 5. When no discharge signal and the first drive signal are received, it provides an energy storage signal to the energy storage module 6. When a discharge signal is received, it transmits the first drive signal and the second drive signal to the second power module 5. The second power module 5 is connected to the first power module 2 and the power supply module 1. When receiving the second drive signal and the second drive signal, it periodically controls the resonant network and the capacitor voltage to clamp and stack the voltage, performs DC-DC regulation on the DC power and outputs the second power to supply power to the connected low-voltage equipment. When receiving the compensation signal, it superimposes the first power and the second power and supplies power to the low-voltage equipment connected to the first power module 2. The energy storage module 6 is connected to the power supply module 1 and is used to store DC power when receiving an energy storage signal and to provide DC power in place of the power supply module 1 when receiving a power supply signal.

[0019] In a specific embodiment, the power module 1 can be a power circuit composed of a power port, capacitor, diode, etc., and can be connected to DC power; the first power module 2 can be a first power circuit composed of a field-effect transistor, diode, capacitor, inductor, etc., which can periodically receive DC power and periodically control the resonant network and capacitor voltage to clamp and stack voltage, thereby performing DC-DC regulation on the DC power; the microcontroller module 3 can be a microcontroller circuit composed of a single-chip microcomputer, integrating many components such as an arithmetic unit, controller, memory, and input / output devices, to realize functions such as signal processing, data storage, module control, and timing control; the drive control module 4 can be... The drive control circuit composed of an inverter and an analog switch can be controlled by the microcontroller module 3 according to the working state of the first power module 2 and the connection state of the second power module 5 with the low-voltage equipment. The second power module 5 can be a second power circuit composed of a power adjustment device, a device interface, and a field-effect transistor. It can alternately receive DC power with the first power module 2 and periodically control the resonant network and capacitor voltage to clamp and stack the voltage, thereby performing DC-DC regulation on the DC power and superimposing the power supply with the first power module 2. The energy storage module 6 can be an energy storage circuit composed of an energy storage device and a field-effect transistor, which can store and discharge energy.

[0020] In this embodiment, please refer to Figure 2 , Figure 3 and Figure 4 The power module 1 includes a power port, a first capacitor C1, a first diode D1, and a sixth diode D6; the first power module 2 includes a first power transistor Q1, a second capacitor C2, a first inductor L1, a second diode D2, and a fifth power transistor Q5; the microcontroller module 3 includes a first controller U1. Specifically, the first end of the power supply port is connected to the anode of the first diode D1 and the anode of the sixth diode D6, and is connected to the second end of the power supply port, the source of the fifth power transistor Q5, and the ground through the first capacitor C1. The cathode of the first diode D1 is connected to the drain of the first power transistor Q1. The source of the first power transistor Q1 is connected to the positive terminal of the second capacitor C2. The negative terminal of the second capacitor C2 is connected to the anode of the second diode D2 and the drain of the fifth power transistor Q5 through the first inductor L1. The gate of the first power transistor Q1 and the gate of the fifth power transistor Q5 are respectively connected to the IO1 and IO2 terminals of the first controller U1.

[0021] In a specific embodiment, both the first power transistor Q1 and the fifth power transistor Q5 can be N-channel MOSFETs; the first inductor L1 and the second capacitor C2 form a resonant network; and the first controller U1 can be an STM32 microcontroller.

[0022] Furthermore, the first power module 2 also includes a second power transistor Q2, a third capacitor C3, a sixth power transistor Q6, and a third diode D3; Specifically, the drain of the second power transistor Q2 is connected to the source of the first power transistor Q1, the source of the second power transistor Q2 is connected to the positive terminal of the third capacitor C3, the negative terminal of the third capacitor C3 is connected to the anode of the third diode D3 and the drain of the sixth power transistor Q6, the source of the sixth power transistor Q6 is connected to the second terminal of the power supply port, and the gates of the second power transistor Q2 and the sixth power transistor Q6 are respectively connected to the IO2 and IO1 terminals of the first controller U1.

[0023] In a specific embodiment, the capacitance of the third capacitor C3 is greater than the capacitance of the second capacitor C2; both the second power transistor Q2 and the sixth power transistor Q6 can be N-channel field-effect transistors.

[0024] Furthermore, the first power module 2 includes a third power transistor Q3, a fourth capacitor C4, a seventh power transistor Q7, a fourth diode D4, a fifth diode D5, a fifth capacitor C5, an eighth diode D8, and a first device interface; Specifically, the drain of the third power transistor Q3 is connected to the source of the second power transistor Q2. The source of the third power transistor Q3 is connected to the drain of the fourth power transistor and the positive terminal of the fourth capacitor C4. The negative terminal of the fourth capacitor C4 is connected to the drain of the seventh power transistor Q7 and the anode of the fourth diode D4 through the second inductor. The cathode of the fourth diode D4 is connected to the cathode of the third diode D3, the cathode of the second diode D2, and the anode of the fifth diode D5. The source of the fourth power transistor is connected to the cathode of the fifth diode D5 and the anode of the eighth diode D8, and is connected to the source of the seventh power transistor Q7, the second terminal of the first device interface, and the second terminal of the power supply port through the fifth capacitor C5. The cathode of the eighth diode D8 is connected to the first terminal of the first device interface. The gate of the third power transistor Q3 is connected to the IO1 terminal of the first controller U1. The gates of the seventh power transistor Q7 and the fourth power transistor are both connected to the IO2 terminal of the first controller U1.

[0025] In a specific embodiment, the third power transistor Q3, the fourth power transistor, and the seventh power transistor Q7 can all be N-channel field-effect transistors; the fourth capacitor C4 and the second inductor form a resonant network, wherein the capacitance of the fourth capacitor C4 is equal to the capacitance of the second capacitor C2.

[0026] Furthermore, the energy storage module 6 includes an eighth power transistor Q8, a ninth power transistor Q9, and an energy storage device; Specifically, the drain of the eighth power transistor Q8 is connected to the first terminal of the power supply port, the source of the eighth power transistor Q8 is connected to the source of the ninth power transistor Q9, the drain of the ninth power transistor Q9 is connected to the first terminal of the energy storage device, the second terminal of the energy storage device is grounded, the gate of the ninth power transistor Q9 is connected to the IO3 terminal of the first controller U1, and the gate of the eighth power transistor Q8 is connected to the drive control module 4.

[0027] In a specific embodiment, the energy storage device can be a lithium battery; the eighth power transistor Q8 and the ninth power transistor Q9 can both be N-channel field-effect transistors.

[0028] Furthermore, the drive control module 4 also includes a first inverter INV1, a second inverter INV2, and a first analog switch U2; Specifically, the input terminal of the first inverter INV1 is connected to the eighth terminal of the first analog switch U2 and the IO1 terminal of the first controller U1; the output terminal of the first inverter INV1 is connected to the third terminal of the first analog switch U2; the fourth terminal of the first analog switch U2 is connected to the gate of the eighth power transistor Q8; the first terminal of the first analog switch U2 is connected to the IO2 terminal of the first controller U1; the sixth and thirteenth terminals of the first analog switch U2 are connected to the input terminal of the second inverter INV2 and the IO5 terminal of the first controller U1; the output terminal of the second inverter INV2 is connected to the fifth terminal of the first analog switch U2; and the ninth and second terminals of the first analog switch U2 are connected to the second power module 5.

[0029] In a specific embodiment, both the first inverter INV1 and the second inverter INV2 can be NOT gates; the first analog switch U2 can be a CD4066 chip.

[0030] Furthermore, the second power module 5 includes a power regulation device, a sixth capacitor C6, a second device interface, a tenth power transistor Q10, a seventh capacitor C7, and a seventh diode D7; Specifically, the input terminal of the power regulation device is connected to the cathode of the sixth diode D6. The first and second driving terminals of the power regulation device are respectively connected to the ninth and second terminals of the first analog switch U2. The output terminal of the power regulation device is connected to the drain of the tenth power transistor Q10 and the first terminal of the second device interface, and is connected to the second terminal of the second device interface, the ground terminal and the ground terminal of the power regulation module through the sixth capacitor C6. The source of the tenth power transistor Q10 is connected to the anode of the seventh diode D7 and the positive terminal of the seventh capacitor C7. The negative terminal of the seventh capacitor C7 is connected to the anode of the eighth diode D8. The cathode of the seventh diode D7 is connected to the first terminal of the first device interface. The gate of the tenth power transistor Q10 is connected to the IO4 terminal of the first controller U1.

[0031] In a specific embodiment, the circuit structure of the power adjustment device is the same as that of the first power transistor Q1, the second capacitor C2, the first inductor L1, the second diode D2, the fifth power transistor Q5, the second power transistor Q2, the third capacitor C3, the sixth power transistor Q6, the third diode D3, the third power transistor Q3, the fourth capacitor C4, the second inductor, the seventh power transistor Q7, the fourth diode D4, the fifth diode D5, and the fourth power transistor. When the first power module 2 receives the first drive signal, the power adjustment device receives the second drive signal; when the first power module 2 receives the second drive signal, the power adjustment device receives the first drive signal. This allows the device to alternately receive DC power and perform periodic power adjustment. The tenth power transistor Q10 can be an N-channel MOSFET. The seventh capacitor C7 can be voltage-superimposed with the fifth capacitor C5.

[0032] The working principle of the intelligent power control circuit for a low-voltage electrical appliance of the present invention is as follows: DC power is connected through the power interface. The IO1 and IO2 terminals of the first controller U1 provide two sets of first and second drive signals with equal duty cycles and complementary phases. When the first drive signal is output, the IO1 terminal of the first controller U1 controls the first power transistor Q1, the third power transistor Q3, and the sixth power transistor Q6 to conduct. At this time, the first power transistor Q1, the second capacitor C2, the first inductor L1, the second diode D2, the fifth diode D5, the eighth diode D8, and the first device interface form a circuit. The DC power charges the second capacitor C2 and the first inductor L1 and stores the energy. The energy is transmitted through the second diode D2. The transmitted energy voltage is the DC power voltage minus the voltage of the second capacitor C2. The charging voltage of the second capacitor C2 and the first inductor L1 is reduced to one-quarter of the DC energy. At this point, the charging voltage of the second capacitor C2 and the first inductor L1 is three-quarters of the DC energy voltage. Simultaneously, the third capacitor C3, the third power transistor Q3, the fourth capacitor C4, the second inductor, the fourth diode D4, the fifth diode D5, the eighth diode D8, the first device interface, and the sixth power transistor Q6 form a circuit. The third capacitor C3 discharges and charges the fourth capacitor C4 and the second inductor, storing energy. The charging voltage of the fourth capacitor C4 and the second inductor is one-quarter of the DC energy. This energy is then transferred through the fourth diode D4. The transferred energy voltage is the voltage of the third capacitor C3 minus the charging voltage of the fourth capacitor C4 and the second inductor. The voltage equals the electrical energy transmitted by the second diode D2, thus achieving voltage reduction and providing a high-voltage connection for the low-voltage device connected to the first device interface. When the second drive signal is output, the IO2 terminal of the first controller U1 controls the second power transistor Q2, the fifth power transistor Q5, the seventh power transistor Q7, and the fourth power transistor to conduct. At this time, the first capacitor C1, the first inductor L1, the fifth power transistor Q5, the second power transistor Q2, the third capacitor C3, the third diode D3, the fifth diode D5, the eighth diode D8, and the first device interface form a circuit. The first capacitor C1 and the first inductor L1 discharge and are charged by the third capacitor C3, and then the electrical energy is transmitted through the third diode D3. The transmitted electrical energy is one-quarter of the DC electrical energy. At the same time, the fourth capacitor C4, the second inductor, the fifth inductor Q5, the seventh power transistor Q7, and the fourth power transistor Q8 are connected to the first device interface. The seventh power transistor Q7, the fourth power transistor, the eighth diode D8, and the first device interface form a circuit to discharge and provide electrical energy, thereby powering the low-voltage equipment. If the second device interface is not connected to the low-voltage equipment, the second inverter INV2 will control the third and fourth terminals of the first analog switch U2 to conduct. When the first controller U1's IO1 terminal does not output the first drive signal, the first inverter INV1 will trigger the eighth power transistor Q8 to conduct through the first analog switch U2, allowing the DC power at this moment to be transferred to the energy storage device for charging control. If the power port is de-energized, the first controller U1's IO3 terminal will output a power supply signal and trigger the ninth power transistor Q9 to conduct, replacing the power port and providing DC power.If the second device interface is connected to a low-voltage device, the IO5 terminal of the first controller U1 will output a discharge signal, so that the first drive signal and the second drive signal output by the first controller U1 drive the power regulation device. The working principle of this power regulation device is the same as that of the first power module 2, but the power regulation device and the first power module 2 alternately receive DC power. Specifically, since the first power module 2 is driven by the first drive signal and the second drive signal, it is in two power regulation states. In the first power regulation state, DC power needs to be processed, while in the second power regulation state, it does not. Therefore, the power regulation device can process DC power in the first power regulation state. When module 2 is in the second power regulation state, it receives DC power and performs the first power regulation state to supply power to the low-voltage equipment connected to the second device interface. If it is necessary to extend the output voltage and no low-voltage equipment is connected to the second device interface, the first controller U1 outputs a discharge signal to control the first power module 2 and the second power module 5 to operate. At the same time, the IO4 terminal of the first controller U1 outputs a compensation signal, which in turn controls the tenth power transistor Q10 to conduct. This allows the seventh capacitor C7 to store the power output of the power regulation device, which is then superimposed with the power stored in the fifth capacitor C5 to supply power to the low-voltage equipment connected to the first device interface.

[0033] 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.

[0034] 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 power supply intelligent control circuit for low-voltage electrical appliances, characterized in that, The circuit includes: The power module is used to connect to DC power. The first power module, connected to the power supply module, is used to periodically control the resonant network and capacitor voltage to clamp and stack voltage, perform DC-DC regulation on DC power and output the first power to power the connected low-voltage equipment. A microcontroller module, connected to a first power module, a second power module, a drive control module, and an energy storage module, provides two sets of first and second drive signals with equal duty cycles and complementary phases. It controls the first and second power modules to alternately receive DC power and perform periodic power regulation. The first power module is driven by the first and second drive signals to operate in two power regulation states: the first state regulates the DC power, while the second state does not. When the first power module is in the second power regulation state, the second power module receives the DC power and operates in the first power regulation state. When the second power module is connected to a low-voltage device, it outputs a discharge signal and changes the signal transmission path of the drive control module. When the second power module is not connected to a low-voltage device and the voltage range of the first power module needs to be extended, it outputs a compensation signal and a discharge signal. When the power module is powered off, it outputs a power supply signal and controls the energy storage module to discharge. The drive control module is connected to the energy storage module and the second power module. When no discharge signal and the first drive signal are received, it provides an energy storage signal to the energy storage module. When a discharge signal is received, it transmits the first drive signal and the second drive signal to the second power module. The second power module, connected to the first power module and the power supply module, is used to periodically control the resonant network and capacitor voltage to clamp and stack voltage when receiving the first drive signal and the second drive signal, to perform DC-DC regulation on the DC power and output the second power to supply power to the connected low-voltage equipment. When receiving the compensation signal, the first power and the second power are superimposed and used to supply power to the low-voltage equipment connected to the first power module. The energy storage module is connected to the power supply module and is used to store DC power when receiving an energy storage signal and to provide DC power in place of the power supply module when receiving a power supply signal. The drive control module further includes a first inverter, a second inverter, and a first analog switch; the microcontroller module includes a first controller; The input terminal of the first inverter is connected to the eighth terminal of the first analog switch and the IO1 terminal of the first controller. The output terminal of the first inverter is connected to the third terminal of the first analog switch. The fourth terminal of the first analog switch is connected to the energy storage module. The first terminal of the first analog switch is connected to the IO2 terminal of the first controller. The sixth and thirteenth terminals of the first analog switch are connected to the input terminal of the second inverter and the IO5 terminal of the first controller. The output terminal of the second inverter is connected to the fifth terminal of the first analog switch. The ninth and second terminals of the first analog switch are connected to the second power module. The IO1 terminal of the first controller outputs the first drive signal, the IO2 terminal outputs the second drive signal, and the IO5 terminal outputs the discharge signal.

2. The intelligent power control circuit for a low-voltage electrical appliance according to claim 1, characterized in that, The power module includes a power port, a first capacitor, a first diode, and a sixth diode; the first power module includes a first power transistor, a second capacitor, a first inductor, a second diode, and a fifth power transistor. The first end of the power port is connected to the anode of the first diode and the anode of the sixth diode, and is connected to the second end of the power port, the source of the fifth power transistor, and the ground through the first capacitor. The cathode of the first diode is connected to the drain of the first power transistor, the source of the first power transistor is connected to the positive terminal of the second capacitor, the negative terminal of the second capacitor is connected to the anode of the second diode and the drain of the fifth power transistor through the first inductor, and the gate of the first power transistor and the gate of the fifth power transistor are respectively connected to the IO1 and IO2 terminals of the first controller.

3. The intelligent power control circuit for a low-voltage electrical appliance according to claim 2, characterized in that, The first power module also includes a second power transistor, a third capacitor, a sixth power transistor, and a third diode; The drain of the second power transistor is connected to the source of the first power transistor. The source of the second power transistor is connected to the positive terminal of the third capacitor. The negative terminal of the third capacitor is connected to the anode of the third diode and the drain of the sixth power transistor. The source of the sixth power transistor is connected to the second terminal of the power supply port. The gates of the second power transistor and the sixth power transistor are respectively connected to the IO2 and IO1 terminals of the first controller.

4. The intelligent power control circuit for a low-voltage electrical appliance according to claim 3, characterized in that, The first power module includes a third power transistor, a fourth capacitor, a seventh power transistor, a fourth diode, a fifth diode, a fifth capacitor, an eighth diode, and a first device interface; The drain of the third power transistor is connected to the source of the second power transistor. The source of the third power transistor is connected to the drain of the fourth power transistor and the positive terminal of the fourth capacitor. The negative terminal of the fourth capacitor is connected to the drain of the seventh power transistor and the anode of the fourth diode through the second inductor. The cathode of the fourth diode is connected to the cathode of the third diode, the cathode of the second diode, and the anode of the fifth diode. The source of the fourth power transistor is connected to the cathode of the fifth diode and the anode of the eighth diode, and is connected to the source of the seventh power transistor, the second terminal of the first device interface, and the second terminal of the power supply port through the fifth capacitor. The cathode of the eighth diode is connected to the first terminal of the first device interface. The gate of the third power transistor is connected to the IO1 terminal of the first controller. The gates of the seventh power transistor and the fourth power transistor are both connected to the IO2 terminal of the first controller.

5. The intelligent power control circuit for a low-voltage electrical appliance according to claim 4, characterized in that, The energy storage module includes an eighth power transistor, a ninth power transistor, and an energy storage device. The drain of the eighth power transistor is connected to the first terminal of the power supply port, the source of the eighth power transistor is connected to the source of the ninth power transistor, the drain of the ninth power transistor is connected to the first terminal of the energy storage device, the second terminal of the energy storage device is grounded, the gate of the ninth power transistor is connected to the IO3 terminal of the first controller, the IO3 terminal outputs a power supply signal, and the gate of the eighth power transistor is connected to the drive control module.

6. The intelligent power control circuit for a low-voltage electrical appliance according to claim 5, characterized in that, The second power module includes a power regulation device, a sixth capacitor, a second device interface, a tenth power transistor, a seventh capacitor, and a seventh diode; The input terminal of the power adjustment device is connected to the cathode of the sixth diode. The first and second driving terminals of the power adjustment device are respectively connected to the ninth and second terminals of the first analog switch. The output terminal of the power adjustment device is connected to the drain of the tenth power transistor and the first terminal of the second device interface, and is connected to the second terminal of the second device interface, the ground terminal and the ground terminal of the power adjustment module through the sixth capacitor. The source of the tenth power transistor is connected to the anode of the seventh diode and the positive terminal of the seventh capacitor. The negative terminal of the seventh capacitor is connected to the anode of the eighth diode. The cathode of the seventh diode is connected to the first terminal of the first device interface. The gate of the tenth power transistor is connected to the IO4 terminal of the first controller. The IO4 terminal outputs a compensation signal.

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