Harmonic energy recovery device, control method thereof, equipment, storage medium and product

Abstract

The invention discloses a harmonic energy recovery device, a control method thereof, equipment, a storage medium and a product. The device comprises a chopping module, an energy recovery module and a controller. The chopping module is arranged between the first alternating-current bus and the second alternating-current bus, comprises a switching tube and is used for carrying out chopping control on an input power supply based on the on-off state of the switching tube; the energy recovery module is connected with the chopping module and is used for supplying power to a first load of the electronic equipment by utilizing energy generated by chopping control; the controller is used for collecting the current value of the input power supply, generating a higher harmonic current curve of the input power supply and controlling the on-off state of the switching tube based on the higher harmonic current curve. The harmonic energy recovery device collects and analyzes harmonic current of an input power supply to obtain a higher harmonic current curve, and performs chopping control on the input power supply based on the phase and amplitude of the higher harmonic current curve so as to suppress and recover higher harmonics without setting a high-capacity capacitor and a high-inductance inductor.

Description

Technical Field

[0001] The present application relates to harmonic suppression technology, and in particular to a harmonic energy recovery device and a control method, device, storage medium and product thereof. Background Art

[0002] There are harmonic components in the AC power (also known as industrial frequency alternating current). Electronic equipment powered by the AC power needs to suppress the high-order harmonics in the AC power when working, so as to prevent the high-order harmonics from affecting the normal operation and service life of the electronic equipment.

[0003] The harmonic energy recovery device can not only suppress the high-order harmonics in the mains, but also recover the energy of the high-order harmonics. In the related art, the harmonic energy recovery device usually adopts a low-frequency inductor-capacitor (LC) circuit to suppress and recover high-order harmonics, but due to the low power frequency, the capacitance of the capacitor and the inductance of the inductor are required to be high, and large-capacitance capacitors and large-inductance inductors are difficult to be directly applied to electronic devices due to their large size and high cost. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a harmonic energy recovery device and its control method, equipment, storage medium and product, aiming to provide a low-cost, small-volume harmonic energy recovery device that can be applied to electronic devices to recover harmonic energy in the input power supply.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a harmonic energy recovery device, which is applied to an electronic device, wherein the electronic device includes a first AC bus and a second AC bus for receiving an input power supply, and the device includes:

[0007] A chopping module is provided between the first AC bus and the second AC bus, and the chopping module includes a switch tube, and is used to perform chopping control on the input power supply based on the on-off state of the switch tube;

[0008] an energy recovery module, connected to the chopping module, and configured to utilize the energy generated by the chopping control to power a first load of the electronic device;

[0009] The controller is used to collect the current value of the input power supply, and generate a high-order harmonic current curve of the input power supply based on the current value, and control the on-off state of the switch tube based on the high-order harmonic current curve.

[0010] In some embodiments, the energy recovery module comprises:

[0011] A full-wave rectifier circuit, wherein the input end of the full-wave rectifier circuit is connected to the chopper module, and the output end of the full-wave rectifier circuit is connected to the first load.

[0012] In some embodiments, the switch tube includes:

[0013] A first switch tube, wherein the first switch tube is arranged between the first AC bus and a first input end of the full-wave rectifier circuit;

[0014] A second switch tube, wherein the second switch tube is arranged between the second AC bus and the second input end of the full-wave rectifier circuit.

[0015] In some embodiments, the full-wave rectifier circuit includes: a transformer;

[0016] The input end of the full-wave rectifier circuit is connected to the chopper module, including: a first contact of the primary side of the transformer is connected to the first switch tube, and a second contact of the primary side of the transformer is connected to the second switch tube.

[0017] In some embodiments, the chopping module further comprises:

[0018] A first clamping circuit is provided between a first contact point of the primary side of the transformer and the second AC bus;

[0019] A second clamping circuit is provided between a second contact point of the primary side of the transformer and the first AC bus;

[0020] The first clamping circuit and the second clamping circuit are used to absorb the leakage inductance of the transformer.

[0021] In some embodiments, the first clamping circuit includes: a first diode, a first capacitor and a first resistor, wherein the anode of the first diode is connected to the first contact of the primary side of the transformer, the two ends of the first capacitor are respectively connected to the cathode of the first diode and the second AC bus, and the two ends of the first resistor are respectively connected to the cathode of the first diode and the second AC bus;

[0022] The second clamping circuit includes: a second diode, a second capacitor and a second resistor, the anode of the second diode is connected to the second contact of the primary side of the transformer, the two ends of the second capacitor are respectively connected to the cathode of the second diode and the first AC bus, and the two ends of the second resistor are respectively connected to the cathode of the second diode and the first AC bus.

[0023] In a second aspect, an embodiment of the present application provides a control method for the harmonic energy recovery device as described in the first aspect, the method comprising:

[0024] Collecting the current value of the input power supply and generating a high-order harmonic current curve of the input power supply;

[0025] Based on the phase and amplitude of the high-order harmonic current curve, the on-off state of the switch tube is controlled.

[0026] In some embodiments, the switch tube includes a first switch tube and a second switch tube, and controlling the on-off state of the switch tube based on the phase and amplitude of the high-order harmonic current curve includes:

[0027] If it is determined that the first AC bus is a positive voltage, the second switch tube is controlled to be in an on state, and the on-off state of the first switch tube is controlled based on the phase and amplitude of the high-order harmonic current curve;

[0028] If it is determined that the second AC bus is a positive voltage, the first switch tube is controlled to be in an on state, and the on-off state of the second switch tube is controlled based on the phase and amplitude of the high-order harmonic current curve;

[0029] Among them, the energy recovery module includes a full-wave rectifier circuit, the first switch tube is arranged between the first AC bus and the first input end of the full-wave rectifier circuit, and the second switch tube is arranged between the second AC bus and the second input end of the full-wave rectifier circuit.

[0030] In some embodiments, controlling the on / off state of the switch tube based on the phase and amplitude of the high-order harmonic current curve includes:

[0031] Based on the phase and amplitude of the high-order harmonic current curve, a pulse width modulation (PWM) waveform of the switch tube is generated.

[0032] In a third aspect, an embodiment of the present application provides a harmonic energy recovery device as described in the first aspect, wherein the controller is configured to execute the steps of the method as described in the second aspect.

[0033] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising a first AC bus and a second AC bus for receiving input power, and the electronic device also comprises a harmonic energy recovery device as described in the first aspect.

[0034] In some embodiments, the electronic device is an air conditioner.

[0035] In a fifth aspect, an embodiment of the present application provides a storage medium having a computer program stored thereon. When the computer program is executed by a controller, the steps of the method described in the second aspect are implemented.

[0036] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a controller, implements the steps of the method described in the second aspect.

[0037] The harmonic energy recovery device provided in the embodiment of the present application is applied to an electronic device, and the electronic device includes a first AC bus and a second AC bus for receiving an input power supply. The device includes: a chopping module, an energy recovery module and a controller. The chopping module is arranged between the first AC bus and the second AC bus, and includes a switch tube, which is used to perform chopping control on the input power supply based on the on-off state of the switch tube; the energy recovery module is connected to the chopping module, and is used to use the energy generated by the chopping control to power the first load of the electronic device; the controller is used to collect the current value of the input power supply, and based on the current value, generate a high-order harmonic current curve of the input power supply, and based on the high-order harmonic current curve, control the on-off state of the switch tube. In this way, the harmonic energy recovery device of the embodiment of the present application collects and analyzes the harmonic current of the input power supply, obtains the coupling curve of the high-order harmonic current, and based on the phase and amplitude of the high-order harmonic current curve, performs chopping control on the input power supply to suppress and recover high-order harmonics, without the need to set large-capacity capacitors and large-inductance inductors. The harmonic energy recovery device is small in size and low in cost, and can be applied to electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the structure of a harmonic energy recovery device according to an embodiment of the present application;

[0039] Figure 2 A schematic diagram of waveforms of input voltage and input current of an electronic device in an application example of the present application;

[0040] Figure 3 This is a schematic structural diagram of a harmonic energy recovery device according to another embodiment of the present application;

[0041] Figure 4 A schematic flow chart of a control method of a harmonic energy recovery device according to an embodiment of the present application;

[0042] Figure 5 This is a waveform diagram of input voltage and input current of an electronic device in another application example of the present application.

[0043] Description of reference numerals:

[0044] 1. Chopper module; 11. First clamping circuit; 12. Second clamping circuit; 2. Energy recovery module;

[0045] 21. Full-wave rectifier circuit; 3. Controller; 4. First load; 5. First AC bus;

[0046] 6. Second AC bus; 7. Second load; 8. Rectifier module; 9. First drive module;

[0047] 10. The second driving module. DETAILED DESCRIPTION

[0048] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0050] The present application embodiment provides a harmonic energy recovery device applied to electronic equipment, such as Figure 1 As shown, the electronic device includes a first AC bus 5 and a second AC bus 6 for receiving input power, and the input power supplies power to a second load 7 of the electronic device via the first AC bus 5 and the second AC bus 6 .

[0051] Here, the input power source is an AC power source. In one embodiment, the input power source is a mains power source.

[0052] Here, the electronic device sets a power conversion module at the power supply end of the second load 7 based on the power supply demand of the second load 7. For example, if the second load 7 is a DC load, a rectifier module is set at the power supply end of the second load 7.

[0053] Exemplarily, the device includes: a chopping module 1, an energy recovery module 2 and a controller 3. The chopping module 1 is arranged between the first AC bus 5 and the second AC bus 6, and the chopping module 1 includes a switch tube for performing chopping control on the input power supply based on the on-off state of the switch tube. The energy recovery module 2 is connected to the chopping module 1, and is used to power the first load 4 of the electronic device using the energy generated by the chopping control. The controller 3 is used to collect the current value of the input power supply, and based on the current value, generate a high-order harmonic current curve of the input power supply, and based on the high-order harmonic current curve, control the on-off state of the switch tube.

[0054] It should be noted that since the magnetic field generated by the power generation equipment is not a perfect sine wave and the AC power supply may be connected to a nonlinear load, harmonics usually exist in the AC power supply. Figure 2This is a waveform diagram of the input voltage and input current of an electronic device in an example. Obviously, there are multiple harmonics in the AC power supply, which cause the waveforms of the voltage and current of the AC power supply to be distorted. When the AC power supply is supplied to electronic devices, the harmonics in the AC power supply may cause overheating failures of the electronic devices, aggravate insulation aging, and shorten the service life of the electronic devices. Therefore, it is necessary to suppress the high-order harmonics in the AC power supply.

[0055] It should be noted that the higher harmonics in the AC power supply can be suppressed by compensating the harmonics. In the related art, since the LC circuit has a simple structure and can compensate for both harmonics and reactive power, a harmonic compensation device including an LC circuit is usually used to suppress the higher harmonics.

[0056] It should be noted that while suppressing the high-order harmonics of the AC power supply, the energy of the high-order harmonics can also be recovered and reused. As a nonlinear load, the LC circuit has the function of energy storage and can be used in a harmonic energy recovery device; however, the frequency of a common AC power supply is usually low, so the capacitance of the capacitor and the inductance of the inductor used in the harmonic energy recovery device are required to be high. For example, when the harmonic energy recovery device configured with an LC circuit is applied to an air conditioner, the required capacitance of the capacitor is 22μF and the required inductance of the inductor is 50mH. Obviously, since large-capacity capacitors and large-inductance inductors are large in size and high in cost, they are difficult to be directly applied to electronic devices. The harmonic energy recovery device configured with an LC circuit needs to be set outside the electronic device.

[0057] It can be understood that the embodiment of the present application provides a low-cost, small-volume harmonic energy recovery device that can be set inside an electronic device. The chopper module 1 includes a switching tube, which suppresses high-order harmonics in the input power supply and recovers energy through high-frequency chopping.

[0058] Specifically, the controller 3 collects the current of the first AC bus 5 and / or the second AC bus 6 through the current sensor set on the AC bus to obtain the current value of the input power supply. The current of the input power supply includes a fundamental component and a harmonic component. The current value of the input power supply i in (t) Specifically:

[0059]

[0060] Here, I rms is the effective value of the current of the input power supply, f1 is the fundamental frequency of the current, is the fundamental phase, is the nth harmonic current phase, α n is the ratio of the nth harmonic current amplitude to the fundamental current amplitude. n≥0, the harmonic current and fundamental current have the same direction; when α n When ≤0, the harmonic current and fundamental current are in opposite directions.

[0061] Here, the controller 3 calculates and analyzes the current value of the input power supply obtained, and extracts the current value of the third and higher harmonics from the current value of the input power supply obtained. c (t) include:

[0062]

[0063] Here, the controller 3 generates a higher harmonic current curve based on the current values ​​of the third-order and higher-order current harmonics, and the higher harmonic current curve is a coupling curve of the third-order and higher-order harmonic currents.

[0064] It can be understood that the controller 3 generates a corresponding PWM waveform based on the phase and amplitude of the high-order harmonic current curve, and performs chopping control on the input power supply by controlling the on-off state of the switch tube. Since the PWM waveform of the switch tube corresponds to the high-order harmonic current curve, the harmonic energy recovery device can compensate for the high-order harmonics in the input power supply; the chopping module 1 is connected to the energy recovery module 2, and the energy of the high-order harmonics in the input power supply can power the first load 4 of the electronic device through the energy recovery module 2. The harmonic energy recovery device can recover and reuse the energy of the high-order harmonics while compensating for the high-order harmonics in the input power supply.

[0065] It can be understood that the harmonic energy recovery device of the embodiment of the present application collects and analyzes the harmonic current of the input power supply to obtain a coupling curve of the high-order harmonic current, and based on the phase and amplitude of the high-order harmonic current curve, performs chopping control on the input power supply to suppress and recover high-order harmonics. There is no need to set large-capacity capacitors and large-inductance inductors. The harmonic energy recovery device is small in size and low in cost and can be used in electronic equipment.

[0066] For example, Figure 3 As shown, the electronic device includes a harmonic energy recovery device, and a first film capacitor CX1, a second film capacitor CX2 and a common mode inductor L1 are arranged on the first AC bus 5 and the second AC bus 6 of the electronic device to filter the input power supply. The first AC bus 5 and the second AC bus 6 supply power to the second load 7 of the electronic device through the rectifier module 8 and the second polarity capacitor E2.

[0067] Exemplarily, the energy recovery module 2 includes a full-wave rectifier circuit 21 . An input end of the full-wave rectifier circuit 21 is connected to the chopper module 1 , and an output end of the full-wave rectifier circuit 21 is connected to the first load 4 .

[0068] Here, the full-wave rectifier circuit 21 includes a transformer T1, a third diode D3, a fourth diode D4 and a first polarity capacitor E1. The input end of the full-wave rectifier circuit 21 is the primary side of the transformer T1, which is used to connect the chopping module 1, the third diode D3 and the fourth diode D4 are output rectifier diodes, the first polarity capacitor E1 is an output filter capacitor, the two ends of the secondary side of the transformer T1 are connected to the positive electrode of the first polarity capacitor E1 through the third diode D3 or the fourth diode D4, and the middle junction of the secondary side of the transformer T1 is connected to the negative electrode of the first polarity capacitor E1. When the chopping module 1 performs chopping control on the input power supply, the energy of the primary side of the transformer T1 is coupled to the secondary side, which is used to power the first load 4, wherein the energy of the primary side of the transformer T1 is the energy of the higher harmonics of the input power supply, and the first load 4 is a DC load.

[0069] It can be understood that, based on the full-wave rectifier circuit 21 of the energy recovery module 2, the harmonic energy recovery device of the embodiment of the present application realizes the recovery and reuse of the energy of the higher harmonics of the input power supply.

[0070] Exemplarily, the switch tubes of the chopper module 1 include: a first switch tube Q1 and a second switch tube Q2. The first switch tube Q1 is arranged between the first AC bus 5 and the first input end of the full-wave rectifier circuit 21; the second switch tube Q2 is arranged between the second AC bus 6 and the second input end of the full-wave rectifier circuit 21.

[0071] Here, the first input end of the full-wave rectifier circuit 21 is the first contact of the primary side of the transformer T1, the second input end of the full-wave rectifier circuit 21 is the second contact of the primary side of the transformer T1, and the input end of the full-wave rectifier circuit 21 is connected to the chopper module 1, including: the first contact of the primary side of the transformer T1 is connected to the first switch tube Q1, and the second contact of the primary side of the transformer T1 is connected to the second switch tube Q2.

[0072] It should be noted that the controller 3 is also used to collect the voltage value of the input power supply to determine the voltage phase of the input power supply; the first switch tube Q1 and the second switch tube Q2 of the chopping module 1 are respectively used to perform chopping control on the input power supply in the positive half cycle and the negative half cycle of the input power supply. Among them, in the positive half cycle of the input power supply, the voltage of the first AC bus 5 is a positive voltage, and the first switch tube Q1 is used as a chopper switch tube to perform chopping control on the input power supply. When the first switch tube Q1 is turned on, the primary side of the transformer T1 stores energy. When the first switch tube Q1 is turned off, the transformer T1 supplies power to the first load 4 via the third diode D3. The second switch tube Q2 is used as a freewheeling switch tube to make the chopped input power flow to the second AC bus 6; in the negative half cycle of the input power supply, the voltage of the second AC bus 6 is a positive voltage, and the second switch tube Q2 is used as a chopper switch tube to perform chopping control on the input power supply. When the second switch tube Q2 is turned on, the primary side of the transformer T1 stores energy. When the second switch tube Q2 is turned off, the transformer T1 supplies power to the first load 4 via the fourth diode D4. The first switch tube Q1 is used as a freewheeling switch tube to make the chopped input power flow to the first AC bus 5.

[0073] Here, the controller 3 can control the on-off state of the first switch tube Q1 through the first driving module 9 ; the controller 3 can control the on-off state of the second switch tube Q2 through the second driving module 10 .

[0074] It can be understood that the harmonic energy recovery device of the embodiment of the present application performs chopping control on the input power supply based on controlling the on-off state of the first switch tube Q1 or the second switch tube Q2, thereby compensating for the higher harmonics in the input power supply.

[0075] In one embodiment, the first switch tube Q1 and the second switch tube Q2 may be MOS tubes.

[0076] Exemplarily, the chopper module 1 further includes: a first clamping circuit 11 and a second clamping circuit 12. The first clamping circuit 11 is arranged between the first contact of the primary side of the transformer T1 and the second AC bus 6; the second clamping circuit 12 is arranged between the second contact of the primary side of the transformer T1 and the first AC bus 5. The first clamping circuit 11 and the second clamping circuit 12 are used to absorb the leakage inductance of the transformer T1.

[0077] Exemplarily, the first clamping circuit 11 includes: a first diode D1, a first capacitor C1 and a first resistor R1. The anode of the first diode D1 is connected to the first contact of the primary side of the transformer T1, the two ends of the first capacitor C1 are respectively connected to the cathode of the first diode D1 and the second AC bus 6, and the two ends of the first resistor R1 are respectively connected to the cathode of the first diode D1 and the second AC bus 6.

[0078] Exemplarily, the second clamping circuit 12 includes: a second diode D2, a second capacitor C2, and a second resistor R2. The anode of the second diode D2 is connected to the second contact of the primary side of the transformer T1, the two ends of the second capacitor C2 are respectively connected to the cathode of the second diode D2 and the first AC bus 5, and the two ends of the second resistor R2 are respectively connected to the cathode of the second diode D2 and the first AC bus 5.

[0079] It should be noted that, since the energy of the primary side of the transformer T1 cannot be fully coupled to the secondary side, there is leakage inductance on the primary side of the transformer T1, and the leakage inductance will charge the parasitic capacitance of the switch tube, causing a spike voltage to appear at both ends of the switch tube. In the embodiment of the present application, an RCD clamping circuit is provided to absorb the leakage inductance of the transformer T1. Specifically, the first clamping circuit 11 is used to absorb the leakage inductance superimposed on the first switch tube Q1, and the second clamping circuit 12 is used to absorb the leakage inductance superimposed on the second switch tube Q2.

[0080] It can be understood that, in the positive half cycle of the input power supply, the first switch tube Q1 acts as a chopper switch tube. When the first switch tube Q1 is turned off, since the capacitance of the first capacitor C1 is much larger than the capacitance of the parasitic capacitance of the first switch tube Q1, the leakage inductance of the transformer T1 will not charge the parasitic capacitance of the first switch tube Q1, but will charge the first capacitor C1 through the first diode D1. In the negative half cycle of the input power supply, the first diode D1 is reversely turned off, and the first capacitor C1 releases the absorbed leakage inductance through the first resistor R1.

[0081] It can be understood that, in the negative half cycle of the input power supply, the second switch tube Q2 acts as a chopper switch tube. When the second switch tube Q2 is turned off, since the capacitance of the second capacitor C2 is much larger than the capacitance of the parasitic capacitance of the second switch tube Q2, the leakage inductance of the transformer T1 will not charge the parasitic capacitance of the second switch tube Q2, but will charge the second capacitor C2 through the second diode D2. In the positive half cycle of the input power supply, the second diode D2 is reversely turned off, and the second capacitor C2 releases the absorbed leakage inductance through the second resistor R2.

[0082] In an application example of the present application, the first resistor R1 and the second resistor R2 are replaced by bidirectional diodes for clamping voltage, which can also realize the functions of the first clamping circuit 11 and the second clamping circuit 12 of the embodiment of the present application.

[0083] Based on the aforementioned leakage inductance energy recovery device, the embodiment of the present application also provides a control method for the harmonic energy recovery device, such as Figure 4 As shown, the method includes:

[0084] Step 401 : collecting the current value of the input power supply and generating a high-order harmonic current curve of the input power supply.

[0085] Here, the higher harmonics of the input power supply include the third and higher harmonics in the input power supply. The controller 3 calculates and analyzes the collected current values, extracts the third and higher harmonic currents of the input power supply, and generates a higher harmonic current curve of the input power supply.

[0086] Step 402, controlling the on / off state of the switch tube based on the phase and amplitude of the high-order harmonic current curve.

[0087] Exemplarily, controlling the on / off state of a switch tube based on the phase and amplitude of a high-order harmonic current curve includes: generating a PWM waveform of the switch tube based on the phase and amplitude of the high-order harmonic current curve.

[0088] It can be understood that, based on the phase and amplitude of the high-order harmonic current curve, a corresponding PWM waveform is generated, and when the controller controls the switch tube based on the generated PWM waveform, the high-order harmonics in the input power supply can be compensated. Among them, the larger the amplitude of the high-order harmonic current curve, the larger the PWM duty cycle of the switch tube.

[0089] Exemplarily, the switch tube includes a first switch tube Q1 and a second switch tube Q2. Based on the phase and amplitude of the high-order harmonic current curve, controlling the on-off state of the switch tube includes: if it is determined that the first AC bus is a positive voltage, the second switch tube is controlled to be in the on state, and based on the phase and amplitude of the high-order harmonic current curve, the on-off state of the first switch tube is controlled; if it is determined that the second AC bus is a positive voltage, the first switch tube is controlled to be in the on state, and based on the phase and amplitude of the high-order harmonic current curve, the on-off state of the second switch tube is controlled.

[0090] Among them, the energy recovery module 2 includes a full-wave rectifier circuit 21, the first switch tube Q1 is arranged between the first AC bus 5 and the first input end of the full-wave rectifier circuit 21, and the second switch tube Q2 is arranged between the second AC bus 6 and the second input end of the full-wave rectifier circuit 21.

[0091] It can be understood that in the positive half cycle of the input power supply, the first AC bus 5 is a positive voltage, and the second switch tube Q2 acts as a freewheeling diode and is in the on state; the first switch tube Q1 acts as a chopper switch tube, and the controller 3 controls the on and off state of the first switch tube Q1 based on the phase and amplitude of the high-order harmonic current curve to perform chopping control on the input power supply.

[0092] It can be understood that in the negative half cycle of the input power supply, the second AC bus 6 is a positive voltage, and the first switch tube Q1 acts as a freewheeling diode and is in the on state; the second switch tube Q2 acts as a chopper switch tube, and the controller 3 controls the on and off state of the second switch tube Q2 based on the phase and amplitude of the high-order harmonic current curve to perform chopping control on the input power supply.

[0093] In an application example of the present application, a waveform diagram of input voltage and input current of an electronic device using a harmonic energy recovery device according to an embodiment of the present application is provided, such as Figure 5 As shown, it is obvious that the waveforms of the input voltage and input current of the electronic device are close to sine waves. The harmonic energy recovery device of the embodiment of the present application can suppress high-order harmonics in the input power supply, and recover and reuse the energy generated by the high-order harmonics.

[0094] It can be understood that when the harmonic energy recovery device of the embodiment of the present application is controlled based on the aforementioned control method, the higher harmonics in the input power supply of the electronic device can be effectively compensated, and the energy of the higher harmonics can be recovered and reused.

[0095] It can be understood that any step of the control method of the harmonic energy recovery device in the above-mentioned embodiment of the present application can be implemented by configuring the controller 3 of the harmonic energy recovery device.

[0096] The embodiment of the present application also provides an electronic device, which includes a first AC bus 5 and a second AC bus 6 for receiving an input power supply, and the electronic device also includes a harmonic energy recovery device of the embodiment of the present application. In this way, the electronic device compensates for the high-order harmonics in the input power supply based on the harmonic energy recovery device, and uses the energy generated by the high-order harmonics to power the first load 4 of the electronic device.

[0097] Exemplarily, the electronic device is an air conditioner.

[0098] It is understandable that when the electronic device is an air conditioner, the input power is the mains, the first AC bus 5 is the live wire, the second AC bus 6 is the neutral wire, and the energy recovery module 2 can power the control system of the air conditioner.

[0099] In an exemplary embodiment, the embodiment of the present application further provides a storage medium, namely a computer storage medium, which can be a computer-readable storage medium, for example, a memory including a computer program, and the aforementioned computer program can be executed by the controller 3 of the harmonic energy recovery device to complete the steps described in the method of the embodiment of the present application. The computer-readable storage medium can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory.

[0100] In an exemplary embodiment, the embodiment of the present application further provides a computer program product, including a computer program, and the computer program can be executed by the controller 3 to complete the steps described in the method of the embodiment of the present application.

[0101] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0102] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0103] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A harmonic energy recovery device, characterized in that: Applied to electronic equipment, the electronic equipment includes a first AC bus and a second AC bus for receiving input power, and the device includes: A chopping module is provided between the first AC bus and the second AC bus, and the chopping module includes a switch tube, and is used to perform chopping control on the input power supply based on the on-off state of the switch tube; an energy recovery module, connected to the chopping module, and configured to utilize the energy generated by the chopping control to power a first load of the electronic device; The controller is used to collect the current value of the input power supply, and generate a high-order harmonic current curve of the input power supply based on the current value, and control the on-off state of the switch tube based on the high-order harmonic current curve.

2. The device according to claim 1, characterized in that The energy recovery module comprises: A full-wave rectifier circuit, wherein the input end of the full-wave rectifier circuit is connected to the chopper module, and the output end of the full-wave rectifier circuit is connected to the first load.

3. The device according to claim 2, characterized in that The switch tube comprises: A first switch tube, wherein the first switch tube is arranged between the first AC bus and a first input end of the full-wave rectifier circuit; A second switch tube, wherein the second switch tube is arranged between the second AC bus and the second input end of the full-wave rectifier circuit.

4. The device according to claim 3, characterized in that The full-wave rectifier circuit comprises: a transformer; The input end of the full-wave rectifier circuit is connected to the chopper module, including: a first contact of the primary side of the transformer is connected to the first switch tube, and a second contact of the primary side of the transformer is connected to the second switch tube.

5. The device according to claim 4, characterized in that The chopping module also includes: A first clamping circuit is provided between a first contact point of the primary side of the transformer and the second AC bus; A second clamping circuit is provided between a second contact point of the primary side of the transformer and the first AC bus; The first clamping circuit and the second clamping circuit are used to absorb the leakage inductance of the transformer.

6. The device according to claim 5, characterized in that The first clamping circuit includes: a first diode, a first capacitor and a first resistor, wherein the anode of the first diode is connected to the first contact of the primary side of the transformer, the two ends of the first capacitor are respectively connected to the cathode of the first diode and the second AC bus, and the two ends of the first resistor are respectively connected to the cathode of the first diode and the second AC bus; The second clamping circuit includes: a second diode, a second capacitor and a second resistor, the anode of the second diode is connected to the second contact of the primary side of the transformer, the two ends of the second capacitor are respectively connected to the cathode of the second diode and the first AC bus, and the two ends of the second resistor are respectively connected to the cathode of the second diode and the first AC bus.

7. A control method for a harmonic energy recovery device according to any one of claims 1 to 6, characterized in that: The method comprises: Collecting the current value of the input power supply and generating a high-order harmonic current curve of the input power supply; Based on the phase and amplitude of the high-order harmonic current curve, the on-off state of the switch tube is controlled.

8. The method according to claim 7, characterized in that The switch tube includes a first switch tube and a second switch tube, and the controlling the on-off state of the switch tube based on the phase and amplitude of the high-order harmonic current curve includes: If it is determined that the first AC bus is a positive voltage, the second switch tube is controlled to be in an on state, and the on-off state of the first switch tube is controlled based on the phase and amplitude of the high-order harmonic current curve; If it is determined that the second AC bus is a positive voltage, the first switch tube is controlled to be in an on state, and the on-off state of the second switch tube is controlled based on the phase and amplitude of the high-order harmonic current curve; Among them, the energy recovery module includes a full-wave rectifier circuit, the first switch tube is arranged between the first AC bus and the first input end of the full-wave rectifier circuit, and the second switch tube is arranged between the second AC bus and the second input end of the full-wave rectifier circuit.

9. The method according to claim 7, characterized in that: The controlling the on / off state of the switch tube based on the phase and amplitude of the high-order harmonic current curve includes: Based on the phase and amplitude of the high-order harmonic current curve, a pulse width modulation (PWM) waveform of the switch tube is generated.

10. A harmonic energy recovery device according to any one of claims 1 to 6, characterized in that: The controller is configured to perform the steps of the method according to any one of claims 7 to 9.

11. An electronic device, characterized in that: The electronic device comprises a first AC bus and a second AC bus for receiving input power, and the electronic device further comprises the harmonic energy recovery device according to any one of claims 1 to 6.

12. The electronic device according to claim 11, characterized in that: The electronic device is an air conditioner.

13. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a controller, the steps of the method according to any one of claims 7 to 9 are implemented.

14. A computer program product comprising a computer program, characterized in that When the computer program is executed by a controller, the steps of the method according to any one of claims 7 to 9 are implemented.

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