An intelligent control system for intelligent electrical appliances

Abstract

The present invention relates to the field of intelligent electric control technology, and provides an intelligent control system for intelligent electrical appliances, comprising: an MCU control circuit, a power management circuit, and a communication circuit, wherein the MCU control circuit comprises an MCU control chip and a peripheral circuit of the MCU control chip; the power management circuit comprises a power management chip and a power management peripheral circuit, and the power management peripheral circuit comprises a voltage stabilizing circuit, a current detection circuit, a rectifier drive circuit, and an electric energy metering circuit; the communication circuit is connected to the MCU control chip and is used for data interaction between the MCU control circuit and peripheral electronic devices; the present invention can monitor and manage electrical components, and optimize the operating performance of three-phase electricity through the MCU control chip.

Description

Technical Field

[0001] The present invention relates to the field of intelligent electric control technology, and in particular to an intelligent control system for intelligent electrical appliances. Background Art

[0002] At present, power control technology has been rapidly developed and has been widely used in the industrial field. Most power control devices are connected to power supply equipment through rectifiers. Three-phase current-type PWM rectifiers have the characteristics of adjustable input power factor, current detection, voltage monitoring, buck-boost, etc., which makes them widely used in superconducting magnetic energy storage, battery pack charging, new UPS and other occasions. However, in these occasions, three-phase current-type PWM rectifiers are usually operated at high load for a long time. This long-term high-load operation condition will continuously apply electrical stress to the grid-connected filter inductor and capacitor, which will cause the aging of the inductor and capacitor over time. The aging of the inductor and capacitor will cause parameter drift to a certain extent and even cause failures, which will not only seriously affect the operating reliability and stability of the PWM rectifier, but also affect the control robustness and operating performance of the device. Therefore, there is an urgent need for an intelligent control system for intelligent electrical appliances that can monitor the status of inductor and capacitor components in real time and optimize the real-time operating performance. Summary of the invention

[0003] The problem solved by the present invention is to provide an intelligent control system for intelligent electrical appliances which can monitor the status of inductor and capacitor components in real time and optimize the real-time operating performance.

[0004] To solve the above problems, the present invention provides an intelligent control system for intelligent electrical appliances, comprising: an MCU control circuit, a power management circuit, and a communication circuit. The MCU control circuit comprises an MCU control chip and an MCU control peripheral circuit. The power management circuit comprises a power management chip and a power management peripheral circuit. The power management peripheral circuit comprises a voltage stabilizing circuit, a current detection circuit, a rectifier drive circuit, and an electric energy metering circuit. The input end of the power management chip is connected to the MCU control chip for receiving a power management instruction issued by the MCU control chip. The output end of the power management chip is connected to the voltage stabilizing circuit, and then the MCU control chip and the entire intelligent control system of the intelligent electrical appliances are powered by the voltage stabilizing circuit. The management end of the power management chip is respectively connected to the current detection circuit, the rectifier drive circuit, and the electric energy metering circuit; the communication circuit is connected to the MCU control circuit for data interaction between the MCU control circuit and peripheral electronic devices.

[0005] Furthermore, the MCU controls the peripheral circuit including a limit switch circuit, a filter capacitor circuit, and a first crystal oscillator circuit. The input end of the MCU control chip is connected to the power supply via a pull-up resistor, the first output end is grounded via a resistor, and the second output end is grounded via a capacitor. The first control end of the MCU control chip is connected to the power supply via a pull-up resistor, and the second control end is grounded via a capacitor. The limit switch circuit is arranged between the power supply and the ground, the protection end of the MCU control chip is connected to the filter capacitor circuit, and the signal end is connected to the first crystal oscillator circuit.

[0006] Furthermore, the power management circuit serves as a medium for power management, the input end of the power management circuit is connected to the voltage stabilizing circuit, the first detection end is connected to the current detection circuit, the second detection end is connected to the rectifier drive circuit, the output end of the current detection circuit is connected to the electric energy metering circuit, the output end of the rectifier drive circuit is connected to the electric energy metering circuit, the control end of the electric energy metering circuit is connected to the MCU control circuit, and the signal end is connected to the communication circuit.

[0007] Furthermore, the voltage stabilizing circuit includes a first voltage stabilizing circuit, a second voltage stabilizing circuit, and a third voltage stabilizing circuit. The input end of the first voltage stabilizing circuit is connected to a DC power supply, and the output end is connected to the input end of the second voltage stabilizing circuit. The output end of the second voltage stabilizing circuit is connected to the input end of the third voltage stabilizing circuit, and the output end of the third voltage stabilizing circuit is connected to a power supply.

[0008] Furthermore, the current detection circuit includes a current detection chip, a current voltage regulator chip and a current operational amplifier chip, the input end of the current voltage regulator chip is connected to a power supply, the output end is connected to the input end of the current detection chip, the control end of the current detection chip is connected to the MCU control chip, the input end of the current operational amplifier chip is connected to a power supply, and the output end is connected to the MCU control chip.

[0009] Furthermore, the rectifier drive circuit includes a PWM DC drive circuit, a rectifier drive isolation circuit, and a rectifier output voltage detection circuit. The PWM DC drive circuit includes a current sensor chip, an inductor circuit, a MOS tube circuit, and a relay circuit. The input end of the current sensor chip is connected to the second voltage stabilizing circuit via an inductor, the protection end is grounded via a capacitor, the detection end is connected to the current detection circuit, the output end is connected to the input end of the inductor circuit, and the output end of the inductor circuit is connected to the MOS tube circuit. The MOS tube circuit includes a first MOS tube and a second MOS tube. The source of the first MOS tube is connected to the drain of the second MOS tube, the gate of the first MOS tube is connected to the MCU control chip, the gate of the second MOS tube is connected to the MCU control chip, and the source is connected to the power supply. The input end of the relay circuit is connected to the power supply, and the output end is connected to the collector of the first transistor. The emitter of the first transistor is grounded, and the base is connected to the MCU control chip.

[0010] Furthermore, the rectifier drive isolation circuit includes an isolation drive chip and a drive voltage stabilizing circuit, the input end of the drive voltage stabilizing circuit is connected to the first voltage stabilizing circuit, the output end is connected to the input end of the drive isolation chip, the output end of the drive isolation chip is connected to the PWM DC drive circuit via a voltage stabilizing tube, and the control end is connected to the MCU control chip.

[0011] Furthermore, the rectifier output voltage detection circuit includes an operational amplifier chip, a rectifier op amp chip, and a rectifier voltage stabilizing circuit. The input end of the operational amplifier chip is connected to the power supply via a capacitor and an inductor, respectively, and the protection end is grounded via a filter capacitor. The input end of the rectifier op amp chip is connected to the rectifier voltage stabilizing circuit, the output end is grounded via a resistor, and the control end is connected to the MCU control chip.

[0012] Furthermore, the electric energy metering circuit includes a current sensor chip, an electric energy metering chip, and a second crystal oscillator circuit. The input end of the current sensor chip is connected to a power supply, the protection end is grounded, and the output end is connected to the electric energy metering chip via a capacitor and a resistor respectively; the input end of the electric energy metering chip is connected to a power supply, the signal end is connected to the second crystal oscillator circuit, the output end is grounded via a capacitor, and the control end is connected to the MCU control chip.

[0013] Furthermore, the communication circuit includes a USB to TTL circuit and a WIFI circuit. The USB to TTL circuit includes a USB interface and a USB communication chip. The input end of the USB communication chip is connected to a power supply, the output end is connected to the USB interface, the control end is connected to the base of the second transistor, the collector of the second transistor is connected to the power supply via a resistor, and the emitter is connected to the MCU control chip. The WIFI circuit includes a WIFI chip, a crystal oscillator circuit, and a storage chip. The input end of the WIFI chip is connected to a power supply, the adjustment end is connected to the crystal oscillator circuit, the output end is connected to the storage chip, the signal end is connected to the antenna interface, and the control end is connected to the MCU control chip.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the system adopts the MCU control circuit as the central processor of the entire intelligent control system of the intelligent electrical appliance, and realizes the regulation of the intelligent control system of the three-phase electricity by connecting the power management circuit. The power management circuit is connected to the voltage stabilizing circuit, and after multi-stage voltage stabilization, the MCU control chip and various circuits of the intelligent control system of the intelligent electrical appliance are powered. The power management circuit can also detect the current and rectify and drive the current, and connect the electric energy metering circuit at the rear stage of the current detection circuit and the rectification drive circuit to complete the metering of the electric energy through the electric energy metering chip, and transmit the metering information to the MCU control chip for data processing. The data can also be transmitted through the communication circuit and in an appropriate communication method according to the local environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the transmission principle structure of the circuit unit of Example 1 of the present invention;

[0016] Figure 2 This is a schematic diagram of the principle structure of the MCU control circuit of Example 2 of the present invention;

[0017] Figure 3 Schematic diagram of the principle structure of the voltage stabilizing circuit of Embodiment 4 of the present invention;

[0018] Figure 4 Schematic diagram of the principle structure of the current detection circuit of Example 5 of the present invention;

[0019] Figure 5 Schematic diagram of the principle structure of a PWM DC drive circuit according to Embodiment 6 of the present invention;

[0020] Figure 6 Schematic diagram of the principle structure of the rectifier drive isolation circuit of embodiment 7 of the present invention;

[0021] Figure 7 Schematic diagram of the principle structure of a rectifier output voltage detection circuit according to Embodiment 8 of the present invention;

[0022] Figure 8 This is a schematic diagram of the principle structure of the electric energy metering circuit according to Embodiment 9 of the present invention;

[0023] Fig. 9 This is a schematic diagram of the principle structure of the communication circuit of embodiment 10 of the present invention.

[0024] Description of reference numerals:

[0025] 1-MCU control circuit; 2-power management circuit; 3-communication circuit; 4-voltage stabilization circuit

[0026] 5-current detection circuit; 6-rectifier drive circuit; 7-electric energy metering circuit. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0030] like Figure 1 As shown, the present invention provides an intelligent control system for intelligent electrical appliances, comprising: an MCU control circuit 1, a power management circuit 2, and a communication circuit 3. The MCU control circuit 1 comprises an MCU control chip and an MCU control peripheral circuit, the power management circuit 2 comprises a power management chip and a power management peripheral circuit, the power management peripheral circuit comprises a voltage stabilizing circuit, a current detection circuit, a rectifier drive circuit, and an electric energy metering circuit, the input end of the power management chip is connected to the MCU control chip for receiving a power management instruction issued by the MCU control chip, the output end of the power management chip is connected to the voltage stabilizing circuit, and then the MCU control chip and the entire intelligent control system of the intelligent electrical appliances are powered by the voltage stabilizing circuit, the management end of the power management chip is respectively connected to the current detection circuit, the rectifier drive circuit and the electric energy metering circuit; the communication circuit 3 is connected to the MCU control circuit 1 for data interaction between the MCU control circuit 1 and peripheral electronic devices.

[0031] It should be noted that, in the present embodiment, the intelligent control system for intelligent electrical appliances adopts the MCU control circuit 1 as the central processor of the entire intelligent control system for intelligent electrical appliances, and connects the power management circuit 2 through the MCU control chip and its peripheral circuits to realize intelligent regulation of three-phase electricity. The power management circuit 2 is connected to the voltage stabilizing circuit, and after multi-stage voltage stabilization, it supplies power to the MCU control chip and various circuits of the intelligent control system for intelligent electrical appliances (current detection circuit, rectification drive circuit, electric energy metering circuit, communication circuit 3). The power management circuit 2 can also detect the current and drive it through rectification, so that it is connected to the electric energy metering circuit at the rear stage of the current detection circuit and the rectification drive circuit, and completes the measurement of electric energy through the electric energy metering chip. The electric energy metering information can be transmitted to the MCU control chip for data processing, or it can be transmitted through the communication circuit 3 according to the local environment, and adopt an appropriate communication method to transmit data.

[0032] like Figure 2As shown, in one embodiment of the present invention, the MCU controls the peripheral circuit including a limit switch circuit, a filter capacitor circuit, and a first crystal oscillator circuit. The input end of the MCU control chip is connected to the power supply via a pull-up resistor, the first output end is grounded via a resistor, and the second output end is grounded via a capacitor. The first control end of the MCU control chip is connected to the power supply via a pull-up resistor, and the second control end is grounded via a capacitor. The limit switch circuit is arranged between the power supply and the ground, the protection end of the MCU control chip is connected to the filter capacitor circuit, and the signal end is connected to the first crystal oscillator circuit.

[0033] It should be noted that, in this embodiment, the MCU control chip is powered by dual voltages, and the single-chip microcomputer part is powered by 1.9V and 3.3V voltages, wherein pins 159, 90, and 91 of the MCU control chip are respectively connected to the 3.3V power supply via pull-up resistors, pins 76 and 77 are respectively grounded via capacitors, the first crystal oscillator circuit is arranged between pins 76 and 77 of the MCU control chip, the input end of pin 160 is connected to the 3.3V power supply via a pull-up resistor, the output end is grounded, and the limit switch RST is arranged between the power supply and the ground.

[0034] In one embodiment of the present invention, the power management circuit 2 serves as a medium for power management, the input end of the power management circuit 2 is connected to the voltage stabilizing circuit, the first detection end is connected to the current detection circuit, the second detection end is connected to the rectifier drive circuit, the output end of the current detection circuit is connected to the electric energy metering circuit, the output end of the rectifier drive circuit is connected to the electric energy metering circuit, the control end of the electric energy metering circuit is connected to the MCU control circuit 1, and the signal end is connected to the communication circuit 3.

[0035] It should be noted that, in the present embodiment, the power management circuit 2 serves as the medium of power management, i.e., the power management center, and divides the power management part into three parts, wherein the voltage stabilizing circuit (the first part) is used by the system to step down and stabilize the DC power supply, and to supply power to the entire three-phase power intelligent management system; the current detection circuit (the second part) detects the power flowing into the front and rear stages of the current detection chip; the rectifier drive circuit (the third part) PWM rectifier DC drive circuit includes two functions. The first function is a current sensing sensor, which is used to detect the current information of each phase of the three-phase power supply, and through the output port of the current sensor, the detected current information is given to the operation of the front-stage current part for signal processing, and then transmitted to the MCU control chip. The second function is that the right rectifier bridge and the MOS tube form a PWM three-phase full-wave rectifier, through which the three-phase AC power is rectified into a DC power supply for DC output.

[0036] like Figure 3As shown, in one embodiment of the present invention, the voltage stabilizing circuit includes a first voltage stabilizing circuit, a second voltage stabilizing circuit, and a third voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is connected to a DC power supply, and the output end is connected to the input end of the second voltage stabilizing circuit, the output end of the second voltage stabilizing circuit is connected to the input end of the third voltage stabilizing circuit, and the output end of the third voltage stabilizing circuit is connected to a power supply.

[0037] It should be noted that, in the present embodiment, pin 2 of the first voltage stabilizing circuit is connected to a 12V DC power supply, pin 7 is connected to a 12V DC power supply via a resistor, pin 3 is connected to a 5V power supply via an inductor, the chip model of the first voltage stabilizing circuit is EUP3476, pins 1, 2, and 5 of the second voltage stabilizing circuit are connected to a 5V power supply, pin 4 is connected to a 3.3V power supply via an inductor, pin 3 is grounded, a filter capacitor is arranged between the power supply and the ground, the model of the second voltage stabilizing chip is TPS75733, pins 2, 3, and 4 of the third voltage stabilizing circuit are connected to a 3.3V power supply, pin 8 is connected to a 1.9V power supply via an inductor, pin 1 is grounded, a filter capacitor is arranged between the power supply and the ground, and the model of the third voltage stabilizing chip is TPS76801Q.

[0038] like Figure 4 As shown, in one embodiment of the present invention, the current detection circuit includes a current detection chip, a current voltage stabilizing chip and a current operational amplifier chip, the input end of the current voltage stabilizing chip is connected to a power supply, the output end is connected to the input end of the current detection chip, the control end of the current detection chip is connected to the MCU control chip, the input end of the current operational amplifier chip is connected to a power supply, and the output end is connected to the MCU control chip.

[0039] It should be noted that, in this embodiment, the power supply of the current detection chip is a 5V regulated power supply, pins 2, 3, and 11 of the current detection chip are connected to the corresponding pins of the MCU control chip, and pin 14 is connected to the power supply via an inductor. The current detection chip transmits the detected current signal to the MCU control chip, and the MCU control chip issues a current amplifier instruction. At this time, the detected current information is output to the current amplifier chip through the MCU control chip. After the current amplifier chip completes the amplification of the current information, the data is transmitted to the MCU control chip. The entire current detection circuit completes the current detection and data transmission through the control and regulation of the MCU.

[0040] like Figure 5As shown, in one embodiment of the present invention, the rectifier drive circuit includes a PWM DC drive circuit, a rectifier drive isolation circuit, and a rectifier output voltage detection circuit. The PWM DC drive circuit includes a current sensor chip, an inductor circuit, a MOS tube circuit, and a relay circuit. The input end of the current sensor chip is connected to the second voltage stabilizing circuit via an inductor, the protection end is grounded via a capacitor, the detection end is connected to the current detection circuit, the output end is connected to the input end of the inductor circuit, and the output end of the inductor circuit is connected to the MOS tube circuit. The MOS tube circuit includes a first MOS tube and a second MOS tube. The source of the first MOS tube is connected to the drain of the second MOS tube, the gate of the first MOS tube is connected to the MCU control chip, the gate of the second MOS tube is connected to the MCU control chip, and the source is connected to the power supply. The input end of the relay circuit is connected to the power supply, and the output end is connected to the collector of the first triode. The emitter of the first triode is grounded, and the base is connected to the MCU control chip.

[0041] It should be noted that, in the present embodiment, the PWM DC drive circuit is connected to the second voltage stabilizing circuit through the input end of the pin 7 of the current sensor chip via the inductor, the output end of the pin 7 of the current sensor chip is grounded via the filter capacitor, the pin 8 is connected to the current detection circuit, the pin 4 is connected to the input end of the inductor circuit via the inductor, the output end of the inductor circuit is connected to the MOS tube circuit, the source of the first MOS tube of the MOS tube circuit is connected to the drain of the second MOS tube, the gate of the first MOS tube is connected to the MCU control chip, the gate of the second MOS tube is connected to the MCU control chip, the source is connected to the power supply, the input end of the relay circuit is connected to the power supply, the protection end is provided with a voltage stabilizing tube, and the output end is connected to the first triode The collector of the tube, the emitter of the first transistor is grounded, and the base is connected to the MCU control chip. The first transistor serves as a driving switch of the relay circuit. At the same time, multiple groups of voltage regulator tubes are arranged at the input and output ends of the relay to ensure the smooth and safe rectification drive. The PWM rectification DC drive circuit includes two functions. The LTSR6-NP on the left is a current sensor chip, which is mainly used to detect the current information of each phase of the three-phase power supply. Through the output port of the current sensor, the detected current information is given to the operation of the previous current part for signal processing, and then transmitted to the MCU control chip. The rectifier bridge and MOS tube on the right constitute a PWM three-phase full-wave rectifier, through which the three-phase AC power is rectified into a DC power supply.

[0042] like Figure 6 As shown, in one embodiment of the present invention, the rectifier drive isolation circuit includes an isolation drive chip and a drive voltage stabilizing circuit, the input end of the drive voltage stabilizing circuit is connected to the first voltage stabilizing circuit, the output end is connected to the input end of the drive isolation chip, the output end of the drive isolation chip is connected to the PWM DC drive circuit via a voltage stabilizing tube, and the control end is connected to the MCU control chip.

[0043] It should be noted that, in this embodiment, the drive isolation chip adopts a driving voltage stabilizing circuit for separate power supply, and completes the isolation drive of the three-phase electricity through the isolation drive chip, isolates the high and low voltage of the distribution system and the control system transmitted by the circuit, and improves the driving ability of the distribution system. Through this chip, the weak drive signal emitted by the MCU control chip can be converted into a synchronous strong drive level signal, and the power supply can be modulated through the voltage stabilizing tube load connected to the isolation drive chip to avoid the impact current on the line when the large load equipment is started and stopped, causing damage to the equipment system and the control system.

[0044] like Figure 7 As shown, in one embodiment of the present invention, the rectifier output voltage detection circuit includes an operational amplifier chip, a rectifier operational amplifier chip, and a rectifier voltage stabilization circuit. The input end of the operational amplifier chip is connected to the power supply via a capacitor and an inductor, respectively, and the protection end is grounded via a filter capacitor. The input end of the rectifier operational amplifier chip is connected to the rectifier voltage stabilization circuit, the output end is grounded via a resistor, and the control end is connected to the MCU control chip.

[0045] It should be noted that, in this embodiment, pin 1 of the operational amplifier chip is connected to the AC power supply via a capacitor, pins 2, 3, and 4 are respectively connected to the AC power supply via resistors, the input end of pin 8 is connected to a 3.3V power supply, the output end is grounded, the filter capacitor is arranged between the power supply and the ground, pins 6 and 7 are respectively connected to pins 4 and 3 of the rectifier operational amplifier chip via resistors, pin 5 of the rectifier operational amplifier chip is connected to the power supply, the filter capacitor is arranged between the power supply and the ground, and pin 1 of the rectifier operational amplifier chip is connected to the MCU control chip, which is used to rectify and amplify the collected AC power information and transmit it to the MCU control chip, and then read the voltage signal.

[0046] like Figure 8 As shown, in one embodiment of the present invention, the electric energy metering circuit includes a current sensor chip, an electric energy metering chip, and a second crystal oscillator circuit. The input end of the current sensor chip is connected to a power supply, the protection end is grounded, and the output end is connected to the electric energy metering chip via a capacitor and a resistor respectively; the input end of the electric energy metering chip is connected to a power supply, the signal end is connected to the second crystal oscillator circuit, the output end is grounded via a capacitor, and the control end is connected to the MCU control chip.

[0047] It should be noted that, in this embodiment, the electric energy metering circuit is used to detect and measure the electric energy output. By collecting the voltage and current information of the output part, the electric energy and power information can be calculated. At the same time, the anti-leakage technology is adopted, not only the data information of the load front end is collected, but also the current information of the load circuit is collected through the current sensor. The error of the collected current information can be reduced by summing the current information before and after. At the same time, the comparison of the data before and after the current collection can also be used as the data parameter of the leakage self-protection in the circuit. The measured current information can also be transmitted to the communication circuit 3 for data interaction.

[0048] like Fig. 9 As shown, in one embodiment of the present invention, the communication circuit 3 includes a USB to TTL circuit and a WIFI circuit. The USB to TTL circuit includes a USB interface and a USB communication chip. The input end of the USB communication chip is connected to a power supply, the output end is connected to the USB interface, the control end is connected to the base of the second transistor, the collector of the second transistor is connected to the power supply via a resistor, and the emitter is connected to the MCU control chip. The WIFI circuit includes a WIFI chip, a crystal oscillator circuit, and a storage chip. The input end of the WIFI chip is connected to a power supply, the adjustment end is connected to the crystal oscillator circuit, the output end is connected to the storage chip, the signal end is connected to the antenna interface, and the control end is connected to the MCU control chip.

[0049] It should be noted that, in this embodiment, the communication circuit 3 adopts a USB interface and a WIFI circuit for communication, and can adopt an appropriate data method for communication according to the different environments in which the distribution box is located. When the distribution box is in a good wireless network environment, data interaction can be directly carried out through the WIFI circuit. When the network environment is poor, interface data communication can be carried out by connecting the USB interface.

[0050] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An intelligent control system for intelligent electrical appliances, characterized in that: include: An MCU control circuit (1), a power management circuit (2), and a communication circuit (3), wherein the MCU control circuit (1) comprises an MCU control chip and an MCU control peripheral circuit, the power management circuit (2) comprises a power management chip and a power management peripheral circuit, the power management peripheral circuit comprises a voltage stabilizing circuit, a current detection circuit, a rectifier drive circuit, and an electric energy metering circuit, the input end of the power management chip is connected to the MCU control chip for receiving a power management instruction issued by the MCU control chip, the output end of the power management chip is connected to the voltage stabilizing circuit, and the MCU control chip and the entire intelligent control system of an intelligent electrical appliance are powered by the voltage stabilizing circuit, and the management end of the power management chip is respectively connected to the current detection circuit, the rectifier drive circuit, and the electric energy metering circuit; the communication circuit (3) is connected to the MCU control circuit (1) for data exchange between the MCU control circuit (1) and peripheral electronic devices; The voltage stabilizing circuit comprises a first voltage stabilizing circuit, a second voltage stabilizing circuit, and a third voltage stabilizing circuit. The input end of the first voltage stabilizing circuit is connected to a DC power supply, and the output end is connected to the input end of the second voltage stabilizing circuit. The output end of the second voltage stabilizing circuit is connected to the input end of the third voltage stabilizing circuit, and the output end of the third voltage stabilizing circuit is connected to a power supply. The rectifier drive circuit comprises a PWM DC drive circuit, a rectifier drive isolation circuit, and a rectifier output voltage detection circuit. The PWM DC drive circuit comprises a first current sensor chip, an inductor circuit, a MOS tube circuit, and a relay circuit. The input end of the first current sensor chip is connected to the second voltage stabilizing circuit via a first inductor. The protection end is grounded via a third capacitor, the detection end is connected to the current detection circuit, the output end is connected to the input end of the inductor circuit, the output end of the inductor circuit is connected to the MOS tube circuit, the MOS tube circuit comprises a first MOS tube and a second MOS tube, the source of the first MOS tube is connected to the drain of the second MOS tube, the gate of the first MOS tube is connected to the MCU control chip, the gate of the second MOS tube is connected to the MCU control chip, the source is connected to the power supply, the input end of the relay circuit is connected to the power supply, the output end is connected to the collector of the first triode, the emitter of the first triode is grounded, and the base is connected to the MCU control chip.

2. The intelligent control system for intelligent electrical appliances according to claim 1, characterized in that: The MCU control peripheral circuit includes a limit switch circuit, a first filter capacitor circuit, and a first crystal oscillator circuit. The input end of the MCU control chip is connected to the power supply via a first pull-up resistor, the first output end is grounded via a first resistor, and the second output end is grounded via a first capacitor. The first control end of the MCU control chip is connected to the power supply via a second pull-up resistor, and the second control end is grounded via a second capacitor. The limit switch circuit is arranged between the power supply and the ground, the protection end of the MCU control chip is connected to the first filter capacitor circuit, and the signal end is connected to the first crystal oscillator circuit.

3. The intelligent control system for intelligent electrical appliances according to claim 1, characterized in that: The power management circuit (2) serves as a medium for power management, the input end of the power management circuit (2) is connected to the voltage stabilizing circuit, the first detection end is connected to the current detection circuit, the second detection end is connected to the rectifier drive circuit, the output end of the current detection circuit is connected to the electric energy metering circuit, the output end of the rectifier drive circuit is connected to the electric energy metering circuit, the control end of the electric energy metering circuit is connected to the MCU control circuit (1), and the signal end is connected to the communication circuit (3).

4. The intelligent control system for intelligent electrical appliances according to claim 1, characterized in that: The current detection circuit includes a current detection chip, a current voltage regulator chip and a current operational amplifier chip. The input end of the current voltage regulator chip is connected to a power supply, and the output end is connected to the input end of the current detection chip. The control end of the current detection chip is connected to the MCU control chip. The input end of the current operational amplifier chip is connected to a power supply, and the output end is connected to the MCU control chip.

5. The intelligent control system for intelligent electrical appliances according to claim 4, characterized in that: The rectifier drive isolation circuit includes a drive isolation chip and a drive voltage stabilizing circuit. The input end of the drive voltage stabilizing circuit is connected to the first voltage stabilizing circuit, and the output end is connected to the input end of the drive isolation chip. The output end of the drive isolation chip is connected to the PWM DC drive circuit via a voltage stabilizing tube, and the control end is connected to the MCU control chip.

6. The intelligent control system for intelligent electrical appliances according to claim 5, characterized in that: The rectifier output voltage detection circuit includes an operational amplifier chip, a rectifier operational amplifier chip, and a rectifier voltage stabilization circuit. The input end of the operational amplifier chip is connected to the power supply via the fourth capacitor and the second inductor respectively, and the protection end is grounded via the second filter capacitor. The input end of the rectifier operational amplifier chip is connected to the rectifier voltage stabilization circuit, the output end is grounded via the second resistor, and the control end is connected to the MCU control chip.

7. The intelligent control system for intelligent electrical appliances according to claim 1, characterized in that: The electric energy metering circuit includes a second current sensor chip, an electric energy metering chip, and a second crystal oscillator circuit. The input end of the second current sensor chip is connected to a power supply, the protection end is grounded, and the output end is connected to the electric energy metering chip via a fifth capacitor and a third resistor respectively; the input end of the electric energy metering chip is connected to a power supply, the signal end is connected to the second crystal oscillator circuit, the output end is grounded via a sixth capacitor, and the control end is connected to the MCU control chip.

8. The intelligent control system for intelligent electrical appliances according to claim 1, characterized in that: The communication circuit (3) comprises a USB to TTL circuit and a WIFI circuit. The USB to TTL circuit comprises a USB interface and a USB communication chip. The input end of the USB communication chip is connected to a power supply, the output end is connected to the USB interface, the control end is connected to the base of a second transistor, the collector of the second transistor is connected to the power supply via a fourth resistor, and the emitter is connected to the MCU control chip. The WIFI circuit comprises a WIFI chip, a third crystal oscillator circuit, and a storage chip. The input end of the WIFI chip is connected to a power supply, the adjustment end is connected to the third crystal oscillator circuit, the output end is connected to the storage chip, the signal end is connected to an antenna interface, and the control end is connected to the MCU control chip.

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