Inverter and its energy-saving control system

Abstract

The present invention discloses an inverter and an energy-saving control system thereof, the energy-saving control system comprising: an intelligent management unit, a control unit and a recovery unit; the intelligent management unit is used to obtain load data and send the load data to the control unit, the control unit is used to control the working process of the inverter unit according to the load data, and the recovery unit is used to recover the energy generated by the switch tube in the inverter unit during the working process and the temperature change process. The coordinated work of the intelligent management unit and the control unit of the technical solution of the present application can dynamically adjust the working state of the inverter unit, ensure the stable operation of the system under various load conditions, and improve the reliability of the system; the recovery unit recovers the energy generated by the switch tube during the working process and the temperature change process, reduces energy loss, and improves the overall energy utilization efficiency.

Description

Technical Field

[0001] The present application belongs to the field of power electronics technology, and in particular relates to an inverter and an energy-saving control system thereof. Background Art

[0002] In the prior art, the inverter is a key component in modern power electronics technology, which is mainly used to convert direct current (DC) into alternating current (AC) to meet the needs of various electrical equipment. Inverters are widely used in solar power generation systems, electric vehicles, uninterruptible power supplies (UPS), industrial motor drives and other fields. However, the current inverter generates a lot of losses during operation, especially in the energy conversion process, because the switching devices generate a lot of losses during the switching process, wasting precious energy. Therefore, the market is in urgent need of a high-efficiency inverter to solve the above problems. Summary of the invention

[0003] The embodiment of the present invention provides an inverter and an energy-saving control system thereof to solve the above technical problems.

[0004] A first aspect of an embodiment of the present invention provides an energy-saving control system for an inverter, wherein the inverter includes an inverter unit, and the energy-saving control system includes: an intelligent management unit, a control unit, and a recovery unit;

[0005] The inverter unit is respectively connected to the intelligent management unit, the control unit and the recovery unit, the intelligent management unit is also connected to the control unit and the recovery unit, and the recovery unit is also in contact with the switch tube of the inverter unit;

[0006] The intelligent management unit is used to obtain load data and send the load data to the control unit. The control unit is used to control the working process of the inverter unit according to the load data. The recovery unit is used to obtain the energy generated by the switch tube in the inverter unit during the working process.

[0007] Optionally, the intelligent management unit includes an adaptive temperature control module, a monitoring module and a communication module, and the adaptive temperature control module is connected to the monitoring module and the communication module respectively;

[0008] The monitoring module is used to obtain the temperature distribution information inside the inverter and send the temperature distribution information to the adaptive temperature control module;

[0009] The adaptive temperature control module is used to obtain load data, and send the load data and the temperature distribution information to the control unit through the communication module.

[0010] Optionally, the monitoring module includes a monitoring chip and at least one current sensor, and the monitoring chip is connected to the adaptive temperature control module and the current sensor respectively;

[0011] The monitoring module obtains a detection current through the current sensor, and obtains temperature distribution information inside the inverter according to the detection current.

[0012] Optionally, when the monitoring chip detects that the detection voltage exceeds a preset value based on the detection current, the monitoring chip outputs an abnormal signal.

[0013] Optionally, the energy-saving control system includes a temperature reduction module, and the control unit is respectively connected to the temperature reduction module and the adaptive temperature control module;

[0014] The control unit controls the cooling module to adjust the temperature inside the inverter according to the load data and the temperature distribution information.

[0015] Optionally, the cooling module includes an air cooling component and a liquid cooling component;

[0016] The control unit adjusts the wind speed of the air cooling component or the liquid flow rate of the liquid cooling component according to the load data and the temperature distribution information to adjust the temperature inside the inverter.

[0017] Optionally, when the control unit detects that the temperature of the switch tube in the inverter unit exceeds a preset temperature value, the control unit controls the cooling module to cool the switch tube;

[0018] The recovery unit includes a temperature difference power generation module and a recovery control module, wherein the temperature difference power generation module is arranged adjacent to the switch tube, the temperature difference power generation module is connected to the recovery control module, and the recovery control module is connected to the energy storage module;

[0019] The temperature difference power generation module is used to output a recovery current to the recovery control module when the switch tube generates a temperature difference, and the recovery control module charges the energy storage module after processing the recovery current.

[0020] Optionally, the recycling control module includes a first recycling control module, the first recycling control module includes a first recycling control chip, a recycling switch module, a first voltage reduction module and a first feedback module, one end of the recycling switch module is connected to the temperature difference power generation module, the other end of the recycling switch module is connected to one end of the first voltage reduction module, the other end of the first voltage reduction module is respectively connected to one end of the first feedback module and one end of the energy storage module, and the first recycling control chip is respectively connected to the control end of the recycling switch module and the other end of the first feedback module;

[0021] When the first recovery control chip detects the recovery current, it controls the recovery switch module to be turned on, and supplies power to the energy storage module after voltage reduction through the first voltage reduction module. The first recovery control chip also controls the on and off of the switch module according to the feedback signal of the first feedback module.

[0022] Optionally, the recovery control module further includes a second recovery control module, the second recovery control module includes a second recovery control chip, a second buck module and a second feedback module, one end of the second recovery control chip is connected to one end of the switch tube in the inverter, the other end of the second recovery control chip is connected to one end of the second buck module, the other end of the second buck module is respectively connected to one end of the second feedback module and one end of the energy storage module, and the second recovery control chip is respectively connected to the other end of the second feedback module;

[0023] When the second recovery control chip receives the current output by the switch tube, it outputs it to the second step-down module, and powers the energy storage module after the voltage is stepped down by the second step-down module. The second recovery control chip also adjusts the output current according to the feedback signal of the second feedback module.

[0024] A second aspect of an embodiment of the present invention provides an inverter, which includes the energy-saving control system and an inverter unit described in the first aspect.

[0025] The technical effects of the embodiments of the present invention are as follows: through real-time monitoring and data analysis by the intelligent management unit, the control unit dynamically adjusts the working state of the inverter unit according to the load data to achieve precise control of the switch tube. The coordinated work of the intelligent management unit and the control unit can dynamically adjust the working state of the inverter unit to ensure the stable operation of the system under various load conditions and improve the system reliability. The recovery unit recovers the energy generated by the switch tube during operation and temperature changes, reduces energy loss, and improves the overall energy utilization efficiency. The recovered energy can be used for internal power supply of the system or fed back to the power supply, thereby reducing the consumption of external energy and achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0027] Figure 1 It is a structural schematic diagram of an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0028] Figure 2 It is a structural schematic diagram of an intelligent management unit in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0029] Figure 3 It is a structural schematic diagram of a monitoring module in an intelligent management unit in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0030] Figure 4 is another structural schematic diagram of an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0031] Figure 5 is another structural schematic diagram of an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0032] Figure 6 It is a structural schematic diagram of a first recovery control module in a recovery unit in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0033] Figure 7 It is a structural schematic diagram of a second recovery control module in a recovery unit in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0034] Figure 8 is a circuit diagram of an adaptive temperature control module in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0035] Fig. 9 This is an interface circuit diagram of an adaptive temperature control module in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0036] Fig.10 is a circuit diagram of a monitoring module in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0037] Fig.11 is a circuit diagram of a control unit in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0038] Fig.12 is a circuit diagram of a recovery unit in an energy-saving control system of an inverter provided in Embodiment 1 of the present invention;

[0039] In the figure: 101, inverter unit; 102, control unit; 103, intelligent management unit; 104, recovery unit; 131, adaptive temperature control module; 132, monitoring module; 133, communication module; 134, monitoring chip; 135, current sensor; 141, temperature difference power generation module; 142, recovery control module; 150, energy storage module; 160, switch tube; 200, first recovery control module; 201, first recovery control chip; 202, recovery switch module; 203, first step-down module; 204, first feedback module; 300, second recovery control module; 301, second recovery control chip; 302, second step-down module; 303, second feedback module. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present invention to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0042] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there may be no intervening elements or layers. It should be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0043] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0044] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0045] In order to fully understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0046] Embodiment 1

[0047] Embodiment 1 of the present invention provides an energy-saving control system for an inverter, which solves the problem in the prior art that a large amount of energy is wasted due to a large amount of loss generated during the operation of the inverter.

[0048] Embodiment 1 of the present invention provides an energy-saving control system for an inverter, such as Figure 1As shown, the inverter includes an inverter unit 101, and the energy-saving control system includes: an intelligent management unit 103, a control unit 102 and a recovery unit 104; the inverter unit 101 is respectively connected to the intelligent management unit 103, the control unit 102 and the recovery unit 104, the intelligent management unit 103 is also connected to the control unit 102 and the recovery unit 104, and the recovery unit 104 is also in contact with the switch tube of the inverter unit 101; the intelligent management unit 103 is used to obtain load data and send the load data to the control unit 102, the control unit 102 is used to control the working process of the inverter unit 101 according to the load data, and the recovery unit 104 is used to obtain the energy generated by the switch tube in the inverter unit 101 during the working process.

[0049] Among them, the intelligent management unit 103 obtains load data. The intelligent management unit 103 monitors and obtains load data in real time. The load data generally includes but is not limited to the following types of data: 1) Input voltage: measure the DC voltage on the input side of the inverter, which is one of the basic indicators to determine whether the inverter is working normally. 2) Output power: measure the AC power on the output side of the inverter to reflect the actual load condition of the inverter. 3) Output current: measure the AC current on the output side of the inverter to calculate the load size and power factor. 4) Output frequency: measure the AC frequency on the output side of the inverter to ensure the quality and stability of the output signal. 5) Output voltage: measure the AC voltage on the output side of the inverter to ensure that the output voltage meets the load requirements. 6) Running time: record the cumulative running time of the inverter to evaluate the life and maintenance cycle of the inverter. 7) Ambient temperature: monitor the temperature of the environment around the inverter, which affects the operating efficiency and stability of the inverter. 8) Other related parameters: such as the internal temperature of the inverter, the coolant temperature, the status of the switching element, etc. The intelligent management unit 103 sends the acquired load data to the control unit 102, and coordinates the work of the control unit 102 and the recovery unit 104 according to the load conditions and the preset energy-saving strategy to optimize energy utilization. The control unit 102 receives the load data from the intelligent management unit 103, and dynamically adjusts the working state of the inverter unit 101 according to the load data, including the switching frequency and duty cycle of the switch tube, to meet the load demand and optimize energy efficiency, so as to realize the efficient operation of the inverter unit 101 and ensure that the best energy conversion efficiency can be maintained under various load conditions.

[0050] Among them, the control unit 102 adjusts the control data of the inverter unit 101 according to the load data. The load data generally refers to the power demand required by the equipment or application running in the system, which can be obtained by measuring current, voltage, etc. For example, if a motor is running and its power demand increases, the load data will reflect this change. Based on the acquired load data, the control unit 102 can adjust the operating parameters of the inverter unit 101 in real time to meet the load requirements. For example, when the motor load increases, the control unit 102 may increase the output voltage of the inverter unit 101 to provide greater driving force. The inverter unit 101 data adjusted by the control unit 102 includes but is not limited to: 1. Output voltage amplitude: In order to adapt to the needs under different load conditions, the control unit 102 can dynamically adjust the output voltage of the inverter. 2. Output frequency: For devices such as induction motors, changing the output frequency can affect the speed and torque of the motor. 3. Phase control: By adjusting the phase difference between each phase, the performance and efficiency of the three-phase system can be optimized.

[0051] The inverter unit 101 converts direct current into alternating current for use by the load. The inverter unit 101 adjusts the working state of the switch tube according to the instruction of the control unit 102 to achieve efficient power conversion.

[0052] The recovery unit 104 obtains the energy generated by the switch tube in the inverter unit 101 during the switching process. The recovery unit 104 can recover the energy in the following manner:

[0053] 1. The recovery unit 104 can utilize the temperature difference power generation principle of the switch tube to convert the heat energy generated by the switch tube during operation into electrical energy through thermoelectric materials, and recover energy through the temperature change generated by the switch tube during operation.

[0054] 2. The recovery unit 104 can directly capture and store the electric energy generated by the switch tube during operation through the circuit, and convert the switching loss of the switch tube into reusable electric energy through electromagnetic induction or other direct electric energy recovery technologies.

[0055] 3. The recovery unit 104 uses capacitors to store the energy generated when the switch tube is working, and then releases it when needed. Specifically, a high-capacity capacitor is connected in parallel at both ends of the inverter switch tube. When the switch tube is turned off, the excess energy is stored in the capacitor; when the switch tube is turned on, the energy in the capacitor is released into the circuit to assist in power supply.

[0056] 4. The recovery unit 104 uses an inductor to store the energy generated by the switch tube to reduce energy loss. Specifically, an inductor is connected in series in the circuit of the switch tube. When the switch tube is working, the inductor stores the electromagnetic energy generated; when the switch tube stops working, the inductor releases the stored energy to power other circuit parts.

[0057] 5. The recovery unit 104 feeds back the excess energy generated by the switch tube when it is working to the power supply or other loads. Specifically, the excess energy generated by the switch tube when it is working is returned to the power supply or energy storage system through a DC-DC converter or other feedback circuit, thereby reducing overall energy consumption.

[0058] 6. The recovery unit 104 recovers and utilizes the heat generated when the switch tube is working through a heat exchanger and other equipment. Specifically, a heat exchanger is installed around the switch tube to transfer the generated heat to the cooling system for heating other equipment or converting it into electrical energy for use by the system.

[0059] The technical effect of this embodiment is: through real-time monitoring and data analysis by the intelligent management unit, the control unit dynamically adjusts the working state of the inverter unit according to the load data to achieve precise control of the switch tube. The coordinated work of the intelligent management unit and the control unit can dynamically adjust the working state of the inverter unit to ensure the stable operation of the system under various load conditions and improve the system reliability; the recovery unit recovers the energy generated by the switch tube during operation and temperature changes, reduces energy loss, and improves the overall energy utilization efficiency. The recovered energy can be used for internal power supply of the system or fed back to the power supply, thereby reducing the consumption of external energy and achieving the purpose of energy saving.

[0060] As an implementation method, Figure 2 As shown, the intelligent management unit 103 includes an adaptive temperature control module 131, a monitoring module 132 and a communication module 133. The adaptive temperature control module 131 is connected to the monitoring module 132 and the communication module 133 respectively; the monitoring module 132 is used to obtain the temperature distribution information inside the inverter, and send the temperature distribution information to the adaptive temperature control module 131; the adaptive temperature control module 131 is used to obtain load data, and send the load data and temperature distribution information to the control unit 102 through the communication module 133.

[0061] The monitoring module 132 can arrange a current sensor near the switch tube to monitor the temperature according to the current, or arrange multiple temperature sensors to monitor the heat generated during operation, or arrange temperature sensors on key components such as inductors and capacitors to monitor their temperature status. The monitoring module 132 performs noise filtering on the collected temperature data and then uses I 2The adaptive temperature control module 131 transmits the data to the adaptive temperature control module 131 through the C interface. The adaptive temperature control module 131 can install current sensors and voltage sensors at the input port, output port or load connection of the inverter, which can be Hall effect sensors, shunt resistors, voltage divider circuits, etc. The sensors monitor the load current and voltage in real time and transmit these data to the adaptive temperature control module 131. The adaptive temperature control module 131 converts the load data and temperature distribution information into digital format, and can select serial communication protocols such as UART or SPI, or select communication protocols such as Ethernet, WiFi or CAN bus, and send the formatted data to the control unit 102.

[0062] The technical effect of this implementation is: through real-time temperature monitoring, dynamic adjustment of temperature control strategy and load management, to ensure efficient operation of the inverter, improve system reliability and stability, and prevent overheating and overloading.

[0063] As an implementation method, Figure 3 As shown, the monitoring module 132 includes a monitoring chip 134 and at least one current sensor 135. The monitoring chip 134 is connected to the adaptive temperature control module 131 and the current sensor 135 respectively. The monitoring module 132 obtains the detection current through the current sensor 135, and obtains the temperature distribution information inside the inverter according to the detection current. When the monitoring chip 134 detects that the detection voltage exceeds the preset value according to the detection current, it outputs an abnormal signal.

[0064] Among them, the current sensor 135 is installed in the inverter circuit, directly monitors the load current, collects current data in real time and transmits it to the monitoring chip 134. The monitoring chip 134 is connected to the adaptive temperature control module 131 and the current sensor 135, responsible for data transmission and processing, monitoring the current data collected by the current sensor 135, and calculating the temperature distribution information inside the inverter based on these data. The monitoring chip 134 monitors the voltage. Once it detects that the voltage exceeds the preset value, it will generate an abnormal signal, which can be sent to the adaptive temperature control module 131 or other system components through the communication interface for further processing or response.

[0065] The technical effect of this implementation is that the monitoring chip can monitor current and voltage data in real time, provide real-time temperature distribution information and abnormality detection functions, and ensure instant feedback on the system operating status; by detecting voltage anomalies, it can promptly discover potential circuit failures or overload conditions, thereby improving the safety and stability of the inverter system.

[0066] As an implementation method, Figure 4As shown, the energy-saving control system includes a cooling module 105, and the control unit 102 is respectively connected to the cooling module 105 and the adaptive temperature control module 131; the control unit 102 controls the cooling module 105 to adjust the temperature inside the inverter according to the load data and the temperature distribution information.

[0067] The control unit 102 decides when to adjust the operating state of the cooling component according to the load data and temperature distribution information sent by the adaptive temperature control module 131. The control unit 102 generates corresponding instructions based on these data and sends them to the cooling component to make it operate according to a predetermined strategy, such as increasing the air volume or flow rate when the load is large, and reducing the air volume or flow rate when the load is small.

[0068] The cooling module 105 includes an air cooling component and a liquid cooling component; the control unit 102 adjusts the wind speed of the air cooling component or the liquid flow rate of the liquid cooling component according to the load data and the temperature distribution information to adjust the temperature inside the inverter.

[0069] The control unit 102 can be specifically adjusted to operate as follows:

[0070] The control unit 102 changes the speed of the cooling fan according to the load data and temperature distribution information to adjust the air flow rate to achieve better heat dissipation effect, and controls the operation of the coolant circulation pump to make the coolant flow inside the inverter to take away excess heat. The control unit 102 uses an electronic expansion valve or a proportional integral differential (PID) controller to accurately control the flow and pressure of the coolant to adapt to different load conditions. The control unit 102 uses electronic switching elements such as solid-state relays or thyristors to control the opening and closing of the heating or cooling device to keep the inverter within the ideal operating temperature range.

[0071] The technical effect of this embodiment is that the control unit implements an intelligent temperature control strategy based on the load data and temperature distribution information sent by the adaptive temperature control module, and dynamically adjusts the wind speed of the air-cooled component or the liquid flow rate of the liquid-cooled component according to the real-time load conditions and the temperature distribution inside the inverter to keep the inverter within a safe operating temperature range. The control unit optimizes energy efficiency, reduces energy consumption costs, and improves the overall performance and operating efficiency of the inverter system by adjusting the operating status of the air-cooled component and the liquid-cooled component.

[0072] As an implementation method, Figure 5As shown, when the control unit 102 detects that the temperature of the switch tube in the inverter unit 101 exceeds the preset temperature value, the cooling module 105 is controlled to cool the switch tube; the recovery unit 104 includes a temperature difference power generation module 141 and a recovery control module 142, the temperature difference power generation module 141 is arranged adjacent to the switch tube, the temperature difference power generation module 141 is connected to the recovery control module 142, and the recovery control module 142 is connected to the energy storage module 150; the temperature difference power generation module 141 is used to output a recovery current to the recovery control module 142 when a temperature difference is generated in the switch tube, and the recovery control module 142 charges the energy storage module 150 after processing the recovery current.

[0073] Among them, the thermoelectric power generation module 141 uses the thermoelectric effect of the material to convert thermal energy into electrical energy. The thermoelectric material module is the core component of the thermoelectric power generation module 141, which contains thermoelectric materials. When the contact point of two different materials forms a temperature difference, a voltage difference will be generated in the material, and this voltage difference increases with the increase of the temperature difference. The free electrons and electron holes in the thermoelectric material will form a current under the action of the temperature difference, thereby converting thermal energy into electrical energy. The recovery control module 142 will process and adjust the current recovered from the thermoelectric power generation module 141 to ensure that the output current meets the charging requirements and environmental conditions of the energy storage module. The processing process of the recovery control module 142 includes: step-down operation: reduce the high voltage current generated from the thermoelectric power generation module 141 to a voltage level suitable for charging the energy storage module, and use a step-down circuit or transformer to convert the high voltage current into a stable lower voltage output through appropriate electronic components such as inductors, capacitors or semiconductor devices. Voltage stabilization operation: ensure the stability and reliability of the output current when the current fluctuates greatly or the load changes frequently. Use voltage stabilizing devices, such as voltage stabilizing circuits, voltage stabilizing diodes or voltage stabilizing ICs, to control the stability of the output current and ensure that the energy storage module can receive stable current charging. The recycling control module 142 also needs to manage the current charging process and ensure that it operates within a safe range to avoid damage to the energy storage module or safety issues caused by excessive current or voltage fluctuations.

[0074] The technical effect of this implementation is: utilizing the thermoelectric effect of the thermoelectric material module to effectively convert the temperature difference into electrical energy, thereby improving the energy utilization efficiency of the system; the recovery control module accurately processes the current recovered from the temperature difference power generation module, and converts it into electrical energy that meets the charging requirements of the energy storage module through processing operations such as voltage reduction and voltage stabilization, which not only reduces the system's dependence on external energy, but also improves the overall energy efficiency of the system; the recovery control module effectively manages the charging process to ensure stable current output and operation within a safe range, thereby avoiding overcharging, over-discharging and other safety problems, and extending the service life of the energy storage module.

[0075] As an implementation method, Figure 6As shown, the recovery control module 142 includes a first recovery control module 200, which includes a first recovery control chip 201, a recovery switch module 202, a first voltage reduction module 203 and a first feedback module 204. One end of the recovery switch module 202 is connected to the temperature difference power generation module 141, and the other end of the recovery switch module 202 is connected to one end of the first voltage reduction module 203. The other end of the first voltage reduction module 203 is respectively connected to one end of the first feedback module 204 and one end of the energy storage module 150. The first recovery control chip 201 is respectively connected to the control end of the recovery switch module 202 and the other end of the first feedback module 204. When the first recovery control chip 201 detects the recovery current, it controls the recovery switch module 202 to be turned on, and supplies power to the energy storage module 150 after voltage reduction through the first voltage reduction module 203. The first recovery control chip 201 also controls the on and off of the recovery switch module 202 according to the feedback signal of the first feedback module 204.

[0076] The recovery switch module 202 is connected to the thermoelectric power generation module 141 and the first voltage reduction module 203, and is used to control the conduction and disconnection of the current. The recovery switch module 202 is turned off or on according to the signal of the first recovery control chip 201, so as to send the current generated by the thermoelectric power generation module 141 to the first voltage reduction module 203. The first voltage reduction module 203 reduces the high voltage current generated by the thermoelectric power generation module 141 to a voltage level suitable for charging the energy storage module 150, and converts the high voltage into a stable low voltage output through a buck converter or transformer. The first feedback module 204 monitors and feeds back the voltage and current status output by the first buck module 203. The first feedback module 204 detects the changes in voltage and current in real time, and provides a feedback signal to the first recovery control chip 201. The first recovery control chip 201 controls the on and off of the recovery switch module 202, manages the flow of recovery current, and monitors the feedback signal of the first feedback module 204, controls the switch status of the recovery switch module 202, regulates the current flow direction and voltage output, and adjusts the frequency and duty cycle of the recovery switch module 202 according to the feedback signal, so as to maintain a stable output voltage.

[0077] The technical effect of this embodiment is that the first recovery control chip controls the conduction and disconnection of the recovery switch module, effectively sending the current generated by the temperature difference power generation module to the first step-down module; the first step-down module converts the high voltage current into a stable low voltage output through a step-down converter or transformer, which is suitable for charging the energy storage module, and the first recovery control chip adjusts the operating state of the recovery switch module by monitoring the real-time voltage and current information of the first feedback module to ensure stable current flow and voltage output.

[0078] As an implementation method, Figure 7As shown, the recovery control module 142 also includes a second recovery control module 300, which includes a second recovery control chip 301, a second step-down module 302 and a second feedback module 303. One end of the second recovery control chip 301 is connected to one end of the switch tube in the inverter, and the other end of the second recovery control chip 301 is connected to one end of the second step-down module 302. The other end of the second step-down module 302 is respectively connected to one end of the second feedback module 303 and one end of the energy storage module 150, and the second recovery control chip 301 is respectively connected to the other end of the second feedback module 303; when the second recovery control chip 301 receives the current output by the switch tube 160, it outputs it to the second step-down module 302, and powers the energy storage module 150 after the voltage is stepped down by the second step-down module 302. The second recovery control chip 301 also adjusts the output current according to the feedback signal of the second feedback module 303.

[0079] Among them, the second recovery control chip 301 receives the current output by the switch tube 160 by connecting to the inverter, and guides the current to the second buck module 302 according to the received current information, and ensures that the current remains stable when it is transferred to the second buck module 302 by adjusting its control logic. The second buck module 302 is connected to one end of the second recovery control chip 301, receives the current transmitted from the switch tube 160 in the inverter, and bucks the high voltage current to a voltage level suitable for receiving and storing by the energy storage module 150. The second feedback module 303 continuously monitors the current and voltage output by the second buck module 302, and transmits the monitored data to the second recovery control chip 301. The feedback signal includes the change of current and voltage, which is used for the second recovery control chip 301 to adjust the current output. The second recovery control chip 301 adjusts the current by adjusting the frequency and duty cycle of the internal switch to achieve stable current output.

[0080] The technical effect of this embodiment is that the second recovery control chip controls the flow and transfer of current by receiving the current output of the switch tube in the inverter, effectively steps down the high voltage current to a voltage suitable for receiving and storing by the energy storage module through the second step-down module, continuously monitors the current and voltage state of the second step-down module output through the second feedback module, and ensures that the current maintains a stable outflow when transmitted to the second step-down module by adjusting the frequency and duty cycle of the internal switch tube, thereby optimizing the energy transfer process.

[0081] As an implementation mode, based on the above-mentioned first recovery control module 200 and second recovery control module 300, the control unit 102 is connected to the first recovery control module 200 and the second recovery control module 300 respectively. When the control unit 102 detects that the temperature of the switch tube exceeds the preset temperature value, it controls the cooling module to adjust the temperature inside the inverter, and controls the first recovery control module 200 to start working to recover the energy converted from the temperature difference generated when the temperature of the switch tube changes from high to low; when the control unit 102 detects that the switch tube is turned off, it controls the second recovery control module 300 to start working to recover the current output by the residual energy stored when the switch tube is turned off.

[0082] Among them, the control unit 102 regularly monitors the temperature of the switch tube in the inverter. When it is detected that the temperature of the switch tube exceeds the preset safety temperature value, the control unit 102 sends a signal to the cooling module through the intelligent management unit 103 to adjust the temperature inside the inverter. When the control unit 102 detects that the temperature of the switch tube is high, the first recovery control module 200 is started. The first recovery control module 200 converts the temperature difference generated when the temperature of the switch tube changes from high to low into electrical energy by using the thermoelectric effect through the temperature difference power generation module 141 connected to the switch tube in the inverter. The recovered electrical energy is stepped down by the first step-down module 203 and then supplied to the energy storage module 150 to achieve effective energy recovery and storage. When the control unit 102 detects that the switch tube has been turned off, the second recovery control module 300 is started, and the second recovery control module 300 is responsible for processing and recovering the residual energy stored when the switch tube is turned off. The second recovery control chip 301 is connected to one end of the switch tube in the inverter, receives the current output when the switch tube is turned off, and after being stepped down by the second step-down module 302, converts the remaining energy into current output to supply power to the energy storage module 150 or directly re-inject it into the input end of the inverter for auxiliary power supply.

[0083] The technical effect of this embodiment is that: through the first recovery control module and the second recovery control module, the heat energy generated by the switch tube when it is working and shutting down is effectively captured and utilized, and it is converted into electrical energy and stored or reused, thereby reducing energy waste and improving the overall energy efficiency of the system; the control unit monitors the working status of the switch tube, intelligently adjusts the working timing and current output of the first recovery control module and the second recovery control module, and realizes precise management and control of the energy recovery process.

[0084] The embodiment of the present invention is described in detail below through a specific circuit structure:

[0085] The energy-saving control system includes: an intelligent management unit 103 , a control unit 102 and a recovery unit 104 . The intelligent management unit 103 includes an adaptive temperature control module 131 , a monitoring module 132 and a communication module 133 .

[0086] like Figures 8 to 9 As shown, the adaptive temperature control module 131 includes a chip U5A, a PB0 port of the chip U5A is electrically connected to one end of a resistor R27, the other end of the resistor R27 is electrically connected to the cathode of the light-emitting diode D7, a VCAP-1 port of the chip U5A is electrically connected to one end of a capacitor C22, and the other end of the capacitor C22 is grounded. A PH0 OSC_IN port of the chip U5A is electrically connected to one end of a capacitor C23 and a port 1 of the chip Y1, a port 2 of the chip Y1 is electrically connected to the other end of the capacitor C23, a port 3 of the chip Y1 is electrically connected to one end of a capacitor C26 and a PH1 OSC_OUT port of the chip U5A, the other end of the capacitor C26 is electrically connected to a port 4 of the chip Y1, and the other end of the capacitor C23 and the other end of the capacitor C26 are both grounded. Specifically, the chip U5A is provided with a plurality of pins, which can be connected with different external devices. Further, the PA0 port and the PA1 port are used to read analog signals, the PA2 port and the PA3 port are used for serial communication, the PB0 port to the PB7 port are used to control external I2C devices, the PC0 port to the PC3 port are used to control the working state of external devices, the PC4 port to the PC9 port are used to control the LoRa module and the external memory, the PD2 port to the PD7 port are used to control external devices and receive LoRa signals, and the PE0 port to the PE1 port and the PF0 port to the PF1 port can be used to control the LoRa module and receive LoRa signals. At the same time, the capacitor C23 and the capacitor C26 are set at both ends of the chip Y1, which can play the role of filtering and stabilizing oscillation. The chip Y1 is a high-frequency oscillator, which is usually used to generate a stable high-frequency signal. This type of oscillator is used in many electronic devices and systems, such as communication equipment, computers and other digital systems. Its main function is to generate an accurate and stable high-frequency clock signal, which can be used to drive other components or as a reference source to synchronize the operation of the entire system. Specifically, it provides an accurate time reference to ensure that all parts in the system can run at the same speed; supports high-speed data transmission because fast switching states are required to process large amounts of data; and enables low-power design because it can provide higher frequency outputs in a smaller space.

[0087] like Fig.10As shown, the monitoring module 132 includes a chip U15, the IN2 port of the chip U15 is electrically connected to the PC8 port of the chip U5A through a resistor R66, the IN1 port of the chip U15 is electrically connected to the PC13 port of the chip U5A through a resistor R67, and the VM port of the chip U15 is electrically connected to one end of the capacitor C50, the OUT1 port of the chip U15 is electrically connected to the 2 port of the chip J14, the 1 port of the chip J14 is electrically connected to the OUT2 port of the chip U15, the ISEN port of the chip U15 is electrically connected to one end of the resistor R65, and the GND port, the PAD port, the other end of the capacitor C50 and the other end of the resistor R65 of the chip U15 are all grounded. Specifically, the chip U15 has four independent high-performance operational amplifiers, and the resistors R66 and R67 can jointly form a voltage divider network for setting the threshold voltage of the comparator, and they are electrically connected to the IN1 port and the IN2 port of the chip U15, so that they can correspond to two input channels respectively. Furthermore, the chip U15 monitors the corresponding temperature changes in the circuit by monitoring the current and other changes in the circuit. Specifically, the two input terminals of the chip U15, namely the IN1 port and the IN2 port, are connected to the current sensor CT0 and the current sensor CT1 through the resistor R66 and the resistor R67. When the voltage on the current sensor CT0 or the current sensor CT1 exceeds the corresponding comparator threshold, the corresponding OUT1 port or OUT2 port will change state. J14 is a switch element, specifically: when the voltage on the current sensor CT0 or CT1 exceeds the corresponding comparator threshold, the corresponding OUT1 port or OUT2 port will change state, which means that the output signal changes from a high level to a low level, or vice versa. This change can trigger the action of the external circuit, such as starting a certain protection mechanism or issuing a warning signal.

[0088] like Fig.11 As shown, the control unit 102 includes a chip M1, a VDD_EXT port of the chip M1 is grounded through a capacitor C33, a USB_DP interface of the chip M1 is electrically connected to port 3 of the chip J7, a USB_DM port of the chip M1 is electrically connected to port 2 of the chip J7, a USB_VBUS port of the chip M1 is electrically connected to port 1 of the chip J7, a port 4 of the chip J7 is grounded, an ANT_MAIN port of the chip M1 is electrically connected to port 1 of the chip J6, ports 2 and 3 of the chip J6 are both grounded, and a VBAT_BB port and a VBAT_RF port of the chip M1 are both grounded through a capacitor C35. The received signal is processed by the operating program carried by the chip M1 itself, and an operating instruction is sent to the outside according to the processing result.

[0089] like Fig.12As shown, the recovery unit 104 includes a chip U1 and a chip U11, and the chip U1 and the chip U11 are electrically connected through a battery pack B1B2B3, one end of the battery pack B1B2B3 is electrically connected to the chip U1, and the other end of the battery pack B1B2B3 is electrically connected to one end of a resistor R10, and the other end of the resistor R10 is electrically connected to the chip J3, one end of the resistor R13 and one end of the resistor R15, and the other end of the resistor R15 is electrically connected to one end of the inductor L4, one end of the resistor R59, one end of the capacitor C49, one end of the capacitor C5 and one end of the capacitor C45.

[0090] The IN port of chip U11 is electrically connected to one end of resistor R61, one end of capacitor C48 and one end of resistor R64. The other end of resistor R64 is connected to the recovery current. The EN port of chip U11 is connected to the other end of resistor R61 and one end of resistor R62. The BS port of chip U11 is electrically connected to the other end of inductor L4, the cathode of diode D10 and the SW port of chip U11 through capacitor C47. The FB port of chip U11 is connected to the other end of resistor R59, one end of resistor R60 and the other end of capacitor C49. At the same time, the other end of capacitor C5, the other end of capacitor C45, the other end of resistor R60, the other end of resistor R62, the anode of diode D10 and the GND port of chip U11 are all grounded.

[0091] Specifically, the VG port of chip U1 is electrically connected to one end of capacitor C3, the other end of capacitor C3 is electrically connected to the source of transistor Q1, the VCC port of chip U1 is connected to one end of resistor R63, one end of resistor R6 and one end of resistor R7, the other end of resistor R6 is electrically connected to the CHARG port of chip U1 through light-emitting diode D4, and the other end of resistor R7 is electrically connected to one end of resistor R11 and the MPPT port of chip U1. The drain of transistor Q1 is electrically connected to the anode of diode D2, the gate of transistor Q1 is electrically connected to one end of resistor R3 and one end of resistor R4, the other end of resistor R3 is electrically connected to the DRV port of chip U1, the cathode of diode D2 is electrically connected to the cathode of diode D3 and one end of inductor L1, the other end of inductor L1 is electrically connected to the CSP port of chip U1 and one end of resistor R1, the other end of resistor R1 is electrically connected to the BAT port of chip U1, one end of resistor R2, one end of capacitor C2 and the positive electrode of battery pack B1B2B3, the other end of resistor R2 is electrically connected to one end of resistor R5 and the FB port of chip U1, the COM port of chip U1 is electrically connected to one end of resistor R9, and the other end of resistor R9 is electrically connected to one end of capacitor C4. The other end of capacitor C4, the other end of resistor R11, the anode of diode D3, the other end of resistor R4, the other end of resistor R5 and the GND port of chip U1 are all grounded.

[0092] Specifically, resistors R5 and R9 are used to set charging current and voltage limits, capacitors C4 and C47 are used to stabilize the circuit and filter, inductor L1 is used to filter ripple current, and diodes D2, D3, D4 and D10 are used to prevent reverse current flow.

[0093] The source of transistor Q1 is connected to the temperature difference power generation module 141, and is connected to the first recovery current. The IN end of chip U11 is connected to the switch tube, and is connected to the second recovery current. When the control unit 102 detects that the temperature of the switch tube is too high and starts to cool the switch tube, the control chip U1 starts to work, and chip U1 controls transistor Q1 to turn on. The source of transistor Q1 of the recovery unit inputs the first recovery current, and the current passes through switch Q1, diode D2, inductor L1, and resistor R1 to charge battery B1B2B3. Pin 1 of chip U1 is the output of the internal voltage modulator, which provides power for the internal drive circuit. A 100nF capacitor needs to be connected between the VG pin and the VCC pin. The voltage regulator U1 converts the input voltage into the required output voltage, and uses the feedback pin FB to adjust the output voltage to keep it constant. The output voltage is connected to the feedback pin FB after being divided by resistors R2 and R5, forming a closed-loop control loop, which enables chip U1 to adjust its switching frequency and duty cycle according to load requirements, thereby maintaining a stable output voltage. Transistor Q1, inductor L1 and diode D3 form a BUCK step-down circuit. Diode D1 is used to prevent the battery current from flowing back. The LED indicator is lit through resistor R7, indicating that the circuit is operating normally. Keyboard button J3 is used to manually control the operation or setting of the circuit. Other components such as capacitors C2, C3, etc. provide additional filtering and stability functions.

[0094] When the control unit 102 detects that the switch tube is turned off, the control chip U11 starts to work. The chip U11 charges the battery B1B2B3 by stepping down the input current of the V2 port. The resistors R61 and R62 divide the current input to the V2 port to form a high level, so that the 4-pin enable pin of U11 is set high to start the circuit. The inductor L4, the diode D10 and the 6-pin built-in switch tube of the chip U11 form a BUCK buck circuit. The output voltage is divided by the resistors R59 and R60 and connected to the feedback pin FB to form a closed-loop control loop. This enables the chip U11 to adjust the frequency and duty cycle of its internal switch according to the load demand, thereby maintaining a stable output voltage.

[0095] Embodiment 2

[0096] The second embodiment provides an inverter, which includes the energy-saving control system and the inverter unit provided in the first embodiment.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. An energy-saving control system for an inverter, the inverter comprising an inverter unit, characterized in that: The energy-saving control system comprises: an intelligent management unit, a control unit and a recovery unit; The inverter unit is respectively connected to the intelligent management unit, the control unit and the recovery unit, the control unit is also connected to the intelligent management unit and the recovery unit, and the recovery unit is also in contact with the switch tube of the inverter unit; The intelligent management unit is used to obtain load data and send the load data to the control unit, the control unit is used to control the working process of the inverter unit according to the load data, and the recovery unit is used to recover the energy generated by the switch tube in the inverter unit during the working process and the temperature change process; The intelligent management unit includes an adaptive temperature control module, a monitoring module and a communication module, and the adaptive temperature control module is connected to the monitoring module and the communication module respectively; The monitoring module is used to obtain the temperature distribution information inside the inverter and send the temperature distribution information to the adaptive temperature control module; The adaptive temperature control module is used to obtain load data, and send the load data and the temperature distribution information to the control unit through the communication module; The energy-saving control system includes a temperature reduction module, and the control unit is respectively connected to the temperature reduction module and the adaptive temperature control module; The control unit controls the cooling module to adjust the temperature inside the inverter according to the load data and the temperature distribution information; When the control unit detects that the temperature of the switch tube in the inverter unit exceeds a preset temperature value, the control unit controls the cooling module to cool the switch tube; The recovery unit includes a temperature difference power generation module and a recovery control module, wherein the temperature difference power generation module is arranged adjacent to the switch tube, the temperature difference power generation module is connected to the recovery control module, and the recovery control module is connected to the energy storage module; The temperature difference power generation module is used to output a recovery current to the recovery control module when the switch tube generates a temperature difference, and the recovery control module charges the energy storage module after processing the recovery current; The recycling control module comprises a first recycling control module, which comprises a first recycling control chip, a recycling switch module, a first voltage reduction module and a first feedback module, one end of the recycling switch module is connected to the temperature difference power generation module, the other end of the recycling switch module is connected to one end of the first voltage reduction module, the other end of the first voltage reduction module is respectively connected to one end of the first feedback module and one end of the energy storage module, and the first recycling control chip is respectively connected to the control end of the recycling switch module and the other end of the first feedback module; When the first recovery control chip detects the recovery current, it controls the recovery switch module to be turned on, and supplies power to the energy storage module after the voltage is reduced by the first step-down module. The first recovery control chip also controls the on and off of the recovery switch module according to the feedback signal of the first feedback module.

2. The energy-saving control system according to claim 1, characterized in that: The monitoring module includes a monitoring chip and at least one current sensor, and the monitoring chip is connected to the adaptive temperature control module and the current sensor respectively; The monitoring module obtains a detection current through the current sensor, and obtains temperature distribution information inside the inverter according to the detection current.

3. The energy-saving control system according to claim 2, characterized in that: When the monitoring chip detects that the detection voltage exceeds a preset value according to the detection current, the monitoring chip outputs an abnormal signal.

4. The energy-saving control system according to claim 1, characterized in that: The cooling module includes an air cooling component and a liquid cooling component; The control unit adjusts the wind speed of the air cooling component or the liquid flow rate of the liquid cooling component according to the load data and the temperature distribution information to adjust the temperature inside the inverter.

5. The energy-saving control system according to claim 4, characterized in that: When the control unit detects that the temperature of the switch tube in the inverter unit exceeds a preset temperature value, the control unit controls the cooling module to cool the switch tube; The recovery unit includes a temperature difference power generation module and a recovery control module, wherein the temperature difference power generation module is arranged adjacent to the switch tube, the temperature difference power generation module is connected to the recovery control module, and the recovery control module is connected to the energy storage module; The temperature difference power generation module is used to output a recovery current to the recovery control module when the switch tube generates a temperature difference, and the recovery control module charges the energy storage module after processing the recovery current.

6. The energy-saving control system according to claim 1, characterized in that: The recovery control module also includes a second recovery control module, which includes a second recovery control chip, a second buck module and a second feedback module, one end of the second recovery control chip is connected to one end of the switch tube in the inverter, the other end of the second recovery control chip is connected to one end of the second buck module, the other end of the second buck module is respectively connected to one end of the second feedback module and one end of the energy storage module, and the second recovery control chip is respectively connected to the other end of the second feedback module; When the second recovery control chip receives the current output by the switch tube, it outputs it to the second step-down module, and powers the energy storage module after the voltage is stepped down by the second step-down module. The second recovery control chip also adjusts the output current according to the feedback signal of the second feedback module.

7. An inverter, characterized in that: The inverter comprises the energy-saving control system and the inverter unit according to any one of claims 1 to 6.

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