Driving control method and device, driving circuit, household appliance and storage medium

Abstract

The invention relates to a drive control method and device, a drive circuit, a household appliance and a storage medium. The method comprises the following steps: acquiring a bus voltage output by a power factor correction circuit in the driving circuit; when the bus voltage output by the power factor correction circuit is larger than a first preset voltage, a voltage stabilizing circuit connected with the output end of the power factor correction circuit in the driving circuit is controlled to operate according to a first energy storage mode, the voltage stabilizing circuit works in the first energy storage mode, and the voltage stabilizing circuit works in the second energy storage mode; and the storage circuit is used for storing redundant electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit and the first preset voltage into a thin-film capacitor in the voltage stabilizing circuit. The electrolytic capacitor is replaced by the thin-film capacitor in the stabilizing circuit, so that the problems of relatively high failure rate and relatively short service life caused by the electrolytic capacitor in the driving circuit of the household appliance are solved.

Description

Technical Field

[0001] The present application relates to the field of drive control, and in particular to a drive control method, device, drive circuit, household appliance and storage medium. Background Art

[0002] For home appliances with high mainboard power, at least two 1000UF electrolytic capacitors are usually connected in parallel at the output bus terminal of the PFC (Power Factor Correction) circuit in the drive circuit. The electrolytic capacitor contains electrolyte, which will change over time and even leak on the circuit board after a long time. Therefore, the electrolyte makes the electrolytic capacitor prone to failure and has a short service life. Electrolytic capacitors have become the weakest link in the power electronics system, with the highest failure rate and a failure rate of 60%, thereby reducing the service life of the PFC circuit, and further affecting the service life and operating stability of home appliances. Summary of the invention

[0003] The present application provides a drive control method, device, drive circuit, household appliance and storage medium to solve the problems of high failure rate and low service life caused by electrolytic capacitors in the drive circuit of the household appliance.

[0004] In a first aspect, the present application provides a drive control method, the method comprising:

[0005] Obtaining the bus voltage output by the power factor correction circuit in the drive circuit;

[0006] When the bus voltage output by the power factor correction circuit is greater than a first preset voltage, the voltage stabilizing circuit connected to the output end of the power factor correction circuit in the driving circuit is controlled to operate in a first energy storage mode, wherein the voltage stabilizing circuit operates in the first energy storage mode and is used to store excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit and the first preset voltage in a thin film capacitor in the voltage stabilizing circuit.

[0007] Optionally, when the bus voltage output by the power factor correction circuit is greater than a first preset voltage, after controlling a voltage stabilizing circuit connected to the output end of the power factor correction circuit in the drive circuit to operate in a first energy storage mode, the method further includes:

[0008] When the operation time of the voltage stabilizing circuit in the first energy storage mode reaches a first specified time, controlling the voltage stabilizing circuit to operate in the energy release mode, wherein the voltage stabilizing circuit operates in the energy release mode to release the electric energy stored in the film capacitor to supplement the bus voltage output by the power factor correction circuit;

[0009] When the operating time of the voltage stabilizing circuit in the energy release mode reaches a second specified time, the voltage stabilizing circuit is controlled to operate in the first energy storage mode.

[0010] Optionally, when the bus voltage output by the power factor correction circuit is greater than a first preset voltage, the method further includes:

[0011] A load circuit in the drive circuit connected to the output end of the power factor correction circuit is started.

[0012] Optionally, when the bus voltage output by the power factor correction circuit is greater than a first preset voltage, after controlling a voltage stabilizing circuit connected to the output end of the power factor correction circuit in the drive circuit to operate in a first energy storage mode, the method further includes:

[0013] When a shutdown instruction corresponding to the driving circuit is received, the absorption resistor in the voltage stabilizing circuit is controlled to consume the electric energy released by the film capacitor.

[0014] Optionally, after obtaining the bus voltage output by the power factor correction circuit in the drive circuit, the method further includes:

[0015] When the bus voltage output by the power factor correction circuit is greater than a second preset voltage, the voltage stabilizing circuit is controlled to operate in a second energy storage mode, wherein the second preset voltage is greater than the first preset voltage, and the energy storage intensity of the second energy storage mode is greater than the energy storage intensity of the first energy storage mode.

[0016] In a second aspect, the present application provides a drive control device, the drive control device comprising:

[0017] An acquisition module, used for acquiring the bus voltage output by the power factor correction circuit in the drive circuit;

[0018] A control module, used for controlling the voltage stabilizing circuit connected to the output end of the power factor correction circuit in the driving circuit to operate in a first energy storage mode when the bus voltage output by the power factor correction circuit is greater than a first preset voltage, wherein the voltage stabilizing circuit operates in the first energy storage mode and is used for storing excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit and the first preset voltage in a thin film capacitor in the voltage stabilizing circuit.

[0019] In a third aspect, the present application provides a driving circuit, which includes a power factor correction circuit, a voltage stabilizing circuit and a load circuit, wherein the input end of the power factor correction circuit is used to receive a grid voltage, and the output end of the power factor correction circuit is respectively connected to the voltage stabilizing circuit and the load circuit, and the voltage stabilizing circuit includes a thin film capacitor for storing excess electric energy corresponding to a difference voltage between a bus voltage and a first preset voltage when a bus voltage output by the power factor correction circuit is greater than a first preset voltage.

[0020] Optionally, the power factor correction circuit includes a rectifier bridge, a first inductor, a first diode, and a first switching tube. The first end of the rectifier bridge is used to receive the grid voltage, the second end of the rectifier bridge is connected to the first end of the first inductor, the second end of the first inductor is respectively connected to the positive electrode of the first diode and the first end of the first switching tube, the negative electrode of the first diode serves as the first output end of the power factor correction circuit, and is respectively connected to the voltage stabilizing circuit and the load circuit; the second end of the first switching tube serves as the second output end of the power factor correction circuit, and is respectively connected to the third end of the rectifier bridge, the voltage stabilizing circuit, and the load circuit.

[0021] Optionally, the voltage stabilizing circuit includes a second switch tube, a second diode, a second inductor, a third switch tube, a first resistor, a second resistor, the thin film capacitor, a third inductor, a fourth switch tube and a third diode. The first end of the second switch tube is respectively connected to the first output end of the power factor correction circuit and the load circuit, the second end of the second switch tube is respectively connected to the first end of the second inductor and the cathode of the second diode, the second end of the second inductor is respectively connected to the first end of the third switch, the first end of the second resistor and the first end of the third inductor, the second end of the third switch tube is connected to the first end of the first resistor, the second end of the second resistor is connected to the first end of the thin film capacitor, the second end of the third inductor is respectively connected to the first end of the fourth switch tube and the anode of the third diode, the anode of the second diode, the second end of the first resistor, the second end of the thin film capacitor and the second end of the fourth switch tube are commonly connected to the second output end of the power factor correction circuit, and the cathode of the third diode is connected to the first output end of the power factor correction circuit.

[0022] Optionally, the load circuit includes a first load, a first switching circuit for controlling the first load, a second load, and a second switching circuit for controlling the second load, the first switching circuit is connected between the first load and the output end of the power factor correction circuit, and the second switching circuit is connected between the second load and the output end of the power factor correction circuit.

[0023] In a fourth aspect, the present application provides a household appliance, the household appliance comprising the drive control device as described above and the drive circuit as described above, the drive control device being used to control the working mode of the drive circuit.

[0024] In a fifth aspect, the present application also provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the above-mentioned drive control method.

[0025] The above-mentioned technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the method provided by the embodiment of the present application obtains the bus voltage output by the power factor correction circuit in the driving circuit; when the bus voltage output by the power factor correction circuit is greater than the first preset voltage, the voltage stabilizing circuit connected to the output end of the power factor correction circuit in the driving circuit is controlled to operate according to the first energy storage mode, wherein the voltage stabilizing circuit operates in the first energy storage mode, and is used to store excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit and the first preset voltage in the thin film capacitor in the voltage stabilizing circuit.

[0026] Based on the above method, the electrolytic capacitor is replaced by the thin film capacitor in the stabilizing circuit, so as to achieve the elimination of the electrolytic capacitor in the driving circuit, thereby solving the problem of high failure rate and low service life caused by the electrolytic capacitor in the driving circuit of the home appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0029] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0030] Figure 1 A schematic diagram of a driving circuit provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of a driving circuit provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of a flow chart of a drive control method provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of a flow chart of a drive control method provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the bus voltage control effect provided in an embodiment of the present application;

[0035] Figure 6 A schematic diagram of a flow chart of a drive control method provided in an embodiment of the present application;

[0036] Figure 7 A structural block diagram of a drive control device provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of the internal structure of a household appliance provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0039] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0040] The drive control method is applied to household appliances, and the household appliances can be devices with large mainboard power such as air conditioner outdoor units and refrigerators. In this embodiment, the household appliance is an air conditioner outdoor unit. The household appliance specifically includes a drive circuit and a drive control device, and the drive control device is used to control the working mode of the drive circuit.

[0041] In one embodiment, the driving circuit includes a power factor correction circuit 110, a voltage stabilizing circuit 120 and a load circuit 130, wherein the input end of the power factor correction circuit 110 is used to receive a grid voltage, and the output end of the power factor correction circuit 110 is respectively connected to the voltage stabilizing circuit 120 and the load circuit 130, and the voltage stabilizing circuit 120 includes a thin film capacitor for storing excess electric energy corresponding to a difference voltage between the bus voltage and a first preset voltage when a bus voltage output by the power factor correction circuit 110 is greater than a first preset voltage.

[0042] Specifically, Figure 1 As shown, the power factor correction circuit 110 is a PFC circuit, which is used to receive the grid voltage and convert the grid voltage into a bus voltage and output it to the voltage stabilizing circuit 120 and the load circuit 130, wherein the load circuit 130 may include at least one load, and the load may specifically be a compressor, a fan, a motor and other equipment. The voltage stabilizing circuit 120 is used to detect the fluctuation of the bus voltage. Under normal circumstances, the bus voltage is less than or equal to the first preset voltage, that is, close to the first preset voltage and will not exceed the first preset voltage. If the bus voltage is greater than the first preset voltage, it means that the drive circuit may have surges, abnormal voltage, etc., and the voltage stabilizing circuit 120 is needed to absorb the excess power of the bus voltage exceeding the first preset voltage, so as to stabilize the bus voltage below the first preset voltage. The voltage stabilizing circuit 120 uses a film capacitor to store the excess power, and uses a film capacitor to replace at least two parallel electrolytic capacitors, so as to achieve the removal of electrolytic capacitors in the drive circuit, thereby solving the problem of high failure rate and low service life due to electrolytic capacitors in the drive circuit of household appliances.

[0043] In one embodiment, the power factor correction circuit 110 includes a rectifier bridge, a first inductor, a first diode, and a first switch tube. The first end of the rectifier bridge is used to receive the grid voltage, the second end of the rectifier bridge is connected to the first end of the first inductor, the second end of the first inductor is respectively connected to the positive electrode of the first diode and the first end of the first switch tube, the cathode of the first diode serves as the first output end of the power factor correction circuit 110, and is respectively connected to the voltage stabilizing circuit 120 and the load circuit 130; the second end of the first switch tube serves as the second output end of the power factor correction circuit 110, and is respectively connected to the third end of the rectifier bridge, the voltage stabilizing circuit 120, and the load circuit 130.

[0044] Specifically, Figure 2As shown, the rectifier bridge, the first inductor, the first diode and the first switch tube form a Boost type PFC converter, that is, the power factor correction circuit 110 participates in the operation as a PFC converter. The rectifier bridge is composed of four diodes, L1 indicates the first inductor, D1 indicates the first diode, and Z1 indicates the first switch tube. The input end of the power factor correction circuit 110 is the AC side. The input voltage of the AC side is a sine wave, and the current is also a sine wave. The input voltage and current values ​​are consistent in phase and are respectively:

[0045] Ui(t)=1.414*Uisin(ωt)

[0046] I i(t)=1.414*Iisin(ωt)

[0047] The AC power measurement of the converter (bus power) can be obtained as follows:

[0048] P i(t)=Ui(t)*I i(t)=Ui*I i(1-cos(2ωt))

[0049] The voltage and current on the output side of the Boost PFC converter are both constant values, so the output power should be equal to the average value of the input AC power measurement:

[0050] Po=Pi

[0051] Pi(t)=PoPo*cos(2ωt)

[0052] The reason for the output voltage fluctuation is the power imbalance of the circuit system. The input side power is more than the output side reactive power Po*cos(2ωt), the frequency is twice the input frequency, and the amplitude is equal to the DC power. The traditional method is to use several electrolytic capacitors in parallel to absorb the reactive power Po*cos(2ωt). In this embodiment, the film capacitor in the voltage stabilizing circuit 120 absorbs the reactive power while absorbing the excess electric energy, without affecting the current loop setting, so that the load output current is stable, and the power factor correction capability of the PFC converter is improved.

[0053] In one embodiment, the voltage stabilizing circuit 120 includes a second switch tube, a second diode, a second inductor, a third switch tube, a first resistor, a second resistor, the thin film capacitor, a third inductor, a fourth switch tube and a third diode. The first end of the second switch tube is respectively connected to the first output end of the power factor correction circuit 110 and the load circuit 130, the second end of the second switch tube is respectively connected to the first end of the second inductor and the cathode of the second diode, the second end of the second inductor is respectively connected to the first end of the third switch, the first end of the second resistor and the first end of the third inductor, the second end of the third switch tube is connected to the first end of the first resistor, the second end of the second resistor is connected to the first end of the thin film capacitor, the second end of the third inductor is respectively connected to the first end of the fourth switch tube and the anode of the third diode, the anode of the second diode, the second end of the first resistor, the second end of the thin film capacitor and the second end of the fourth switch tube are commonly connected to the second output end of the power factor correction circuit 110, and the cathode of the third diode is connected to the first output end of the power factor correction circuit 110.

[0054] Specifically, Figure 2 As shown, Z2 indicates the second switch tube, L2 indicates the second inductor, D2 indicates the second diode, Z3 indicates the third switch tube, R1 indicates the first resistor, R2 indicates the second resistor, C1 indicates the film capacitor, L3 indicates the third inductor, Z4 indicates the fourth switch tube, and D3 indicates the third diode. The second switch tube, the second inductor and the second diode in the voltage stabilizing circuit 120 form a first control branch, and the fourth switch tube, the third inductor and the third diode form a second control branch. By switching the working states of the first control branch and the second control branch, the working mode of the voltage stabilizing circuit 120 is switched, that is, when only the first control branch is working, the second switch tube is closed, and the output electric energy of the power factor correction circuit 110 is transferred to the absorption circuit through the second inductor. The absorption circuit is composed of a second resistor and a film capacitor. At this time, the absorption circuit is used to realize the step-down function. Since the film capacitor in the absorption circuit absorbs part of the electric energy of the bus voltage, the bus voltage output by the power factor correction circuit 110 is stepped down.

[0055] The third switch tube and the first resistor form a consumption circuit, which is used to consume the electric energy in the film capacitor when the third switch tube is closed.

[0056] Only when the second control branch is working, the fourth switch tube is closed, and the electric energy stored in the film capacitor is released to the output end of the power factor correction circuit 110 through the third inductor, which is used to supplement the bus voltage output by the power factor correction circuit 110, that is, the voltage stabilizing circuit 120 is used to boost the bus voltage at this time.

[0057] If the first control branch and the second control branch work simultaneously, that is, the second switch tube and the fourth switch tube are closed simultaneously, the second inductor and the third inductor can be used to absorb the voltage spike of the driving circuit simultaneously.

[0058] In one embodiment, the load circuit 130 includes a first load, a first switching circuit for controlling the first load, a second load, and a second switching circuit for controlling the second load, the first switching circuit is connected between the first load and the output end of the power factor correction circuit 110, and the second switching circuit is connected between the second load and the output end of the power factor correction circuit 110.

[0059] Specifically, Figure 2 As shown, the load circuit 130 includes multiple loads and a switch circuit for controlling each load. The switch circuits of each load are connected in parallel, and the output end of each switch circuit is connected to the corresponding load to control the start and stop of the corresponding load. In this embodiment, the load circuit 130 includes two loads, namely a compressor and a fan, and the compressor and the fan each correspond to a control circuit, as shown in FIG. Figure 2 As shown, each control circuit is composed of six switch tubes. The six switch tubes corresponding to the compressor are Z5-Z10, and the six switch tubes corresponding to the fan are Z11-Z16, so as to realize the start and stop control of the compressor or the fan.

[0060] In one embodiment, Figure 3 is a flow chart of a driving control method in an embodiment, referring to Figure 3 , a drive control method is provided. This embodiment mainly applies the method to a drive control device in a household appliance, and the drive control method specifically includes the following steps:

[0061] Step S210, obtaining the bus voltage output by the power factor correction circuit 110 in the drive circuit.

[0062] Specifically, the power factor correction circuit 110 outputs a bus voltage according to the received grid voltage, and the bus voltage output by the power factor correction circuit 110 is provided to the voltage stabilizing circuit 120 and the load circuit 130 respectively. The bus voltage is denoted as U.

[0063] Step S220, when the bus voltage output by the power factor correction circuit 110 is greater than the first preset voltage, the voltage stabilizing circuit 120 in the driving circuit connected to the output end of the power factor correction circuit 110 is controlled to operate in a first energy storage mode, wherein the voltage stabilizing circuit 120 operates in the first energy storage mode, and is used to store excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit 110 and the first preset voltage in a thin film capacitor in the voltage stabilizing circuit 120.

[0064] Specifically, the bus voltage is compared with the first preset voltage to determine whether the bus voltage fluctuation is abnormal. If the bus voltage is greater than the first preset voltage, it means that the drive circuit has encountered a surge or abnormal voltage. At this time, the bus voltage exceeds the normal voltage threshold, and the bus voltage needs to be reduced. Therefore, the thin film capacitor in the voltage stabilization circuit 120 is controlled to absorb and store the excess electrical energy of the bus voltage exceeding the first preset voltage. That is, in the first energy storage mode, only the second switch tube is controlled to be closed, and the bus voltage is transmitted to the absorption circuit through the second inductor. The electrical energy is partially consumed by the first resistor and the second resistor in the absorption circuit, and part of the electrical energy is stored by the thin film capacitor, thereby realizing the function of reducing the bus voltage.

[0065] Based on the above method, the electrolytic capacitor is replaced by the thin film capacitor in the stabilizing circuit, so as to achieve the elimination of the electrolytic capacitor in the driving circuit, thereby solving the problem of high failure rate and low service life caused by the electrolytic capacitor in the driving circuit of the home appliance.

[0066] In one embodiment, Figure 4 As shown, when the bus voltage output by the power factor correction circuit 110 is greater than the first preset voltage, after controlling the voltage stabilizing circuit 120 connected to the output end of the power factor correction circuit 110 in the driving circuit to operate in the first energy storage mode, the method further includes:

[0067] Step S230, when the operating time of the voltage stabilizing circuit 120 in the first energy storage mode reaches a first specified time, controlling the voltage stabilizing circuit 120 to operate in the energy release mode, wherein the voltage stabilizing circuit 120 operates in the energy release mode to release the electric energy stored in the film capacitor to supplement the bus voltage output by the power factor correction circuit 110;

[0068] Step S240, when the operating time of the voltage stabilizing circuit 120 operating in the energy release mode reaches a second specified time, control the voltage stabilizing circuit 120 to operate in the first energy storage mode.

[0069] Specifically, refer to Figure 5After the voltage stabilizing circuit 120 operates in the first energy storage mode for a first specified period of time, it switches to the energy release mode to operate, so as to avoid continuously reducing the bus voltage and causing the bus voltage to be too low. In the energy release mode, only the fourth switch tube is controlled to be closed. At this time, the electric energy released by the film capacitor is fed back to the output end of the power factor correction circuit 110 through the third inductor and the third diode to supplement the bus voltage. That is, the voltage stabilizing circuit 120 works in the energy release mode to achieve the boost of the bus voltage.

[0070] After the voltage stabilizing circuit 120 operates in the energy release mode for the second specified time, it switches back to the first energy storage mode. The first specified time and the second specified time may be the same or different time. In this embodiment, the first specified time is equal to the second specified time, and the first specified time is the inverse of the power frequency cycle of the power grid. The power frequency of the power grid is 50HZ, and the inverse is 0.02 seconds. Therefore, the first specified time and the second specified time are both 0.02 seconds, that is, the first energy storage mode and the energy release mode operate alternately, and the operation cycle of each mode is 0.02 seconds. Figure 5 , thereby dynamically controlling the bus voltage to maintain it at a constant value, preventing the bus voltage from being too high or too low, thereby achieving the effect of stabilizing the bus voltage.

[0071] In one embodiment, Figure 6 As shown, when the bus voltage output by the power factor correction circuit 110 is greater than the first preset voltage, the method further includes:

[0072] Step S250, starting the load circuit 130 in the driving circuit connected to the output end of the power factor correction circuit 110.

[0073] Specifically, when the stable voltage is controlled to perform voltage reduction operation according to the first energy storage mode, the load circuit 130 is also started, that is, the compressor and the fan in the load circuit 130 are controlled to start working, thereby consuming the bus voltage, thereby stabilizing the bus voltage and preventing the bus voltage from being too high to damage the power devices.

[0074] In one embodiment, when the bus voltage output by the power factor correction circuit 110 is greater than the first preset voltage, after controlling the voltage stabilizing circuit 120 connected to the output end of the power factor correction circuit 110 in the driving circuit to operate in the first energy storage mode, the method further includes:

[0075] When a shutdown instruction corresponding to the driving circuit is received, the absorption resistor in the voltage stabilizing circuit 120 is controlled to consume the electric energy released by the film capacitor.

[0076] Specifically, the shutdown command is used to control the drive circuit to stop working. When the drive circuit stops working, the third switch in the voltage stabilizing circuit 120 is controlled to close, so that the voltage released by the film capacitor is consumed by the first resistor and the second resistor, that is, the absorption resistor includes the first resistor and the second resistor. This prevents the power released by the film capacitor from causing the bus voltage to be too high when the drive circuit is started next time, causing a startup surge, thereby damaging the power device.

[0077] In one embodiment, after obtaining the bus voltage output by the power factor correction circuit 110 in the drive circuit, the method further includes:

[0078] When the bus voltage output by the power factor correction circuit 110 is greater than the second preset voltage, the voltage stabilizing circuit 120 is controlled to operate in a second energy storage mode, wherein the second preset voltage is greater than the first preset voltage, and the energy storage intensity of the second energy storage mode is greater than the energy storage intensity of the first energy storage mode.

[0079] Specifically, if the bus voltage output by the power factor correction circuit 110 is greater than the second preset voltage, and the second preset voltage is greater than the first preset voltage, it means that a voltage spike has occurred in the drive circuit. The second switch tube and the fourth switch tube are closed at the same time, and the second inductor and the third inductor are used to absorb the voltage spike of the drive circuit to prevent the voltage spike from damaging the power device.

[0080] Figure 3 , 4 6 is a flow chart of a driving control method in an embodiment. It should be understood that although Figure 3 , 4 The steps in the flowchart of 6 are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 3 , 4 At least part of the steps in 6 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0081] In one embodiment, Figure 7 As shown, a drive control device is provided, comprising:

[0082] An acquisition module 310 is used to acquire the bus voltage output by the power factor correction circuit 110 in the drive circuit;

[0083] The control module 320 is used to control the voltage stabilizing circuit 120 connected to the output end of the power factor correction circuit 110 in the driving circuit to operate in a first energy storage mode when the bus voltage output by the power factor correction circuit 110 is greater than a first preset voltage, wherein the voltage stabilizing circuit 120 operates in the first energy storage mode and is used to store excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit 110 and the first preset voltage in a thin film capacitor within the voltage stabilizing circuit 120.

[0084] In one embodiment, the control module 320 is further configured to:

[0085] When the operation time of the voltage stabilizing circuit 120 in the first energy storage mode reaches a first specified time, the voltage stabilizing circuit 120 is controlled to operate in the energy release mode, wherein the voltage stabilizing circuit 120 operates in the energy release mode to release the electric energy stored in the film capacitor to supplement the bus voltage output by the power factor correction circuit 110;

[0086] When the operation time of the voltage stabilizing circuit 120 in the energy release mode reaches a second specified time, the voltage stabilizing circuit 120 is controlled to operate in the first energy storage mode.

[0087] In one embodiment, the control module 320 is further configured to:

[0088] The load circuit 130 in the driving circuit connected to the output end of the power factor correction circuit 110 is started.

[0089] In one embodiment, the control module 320 is further configured to:

[0090] When a shutdown instruction corresponding to the driving circuit is received, the absorption resistor in the voltage stabilizing circuit 120 is controlled to consume the electric energy released by the film capacitor.

[0091] In one embodiment, the control module 320 is further configured to:

[0092] When the bus voltage output by the power factor correction circuit 110 is greater than the second preset voltage, the voltage stabilizing circuit 120 is controlled to operate in a second energy storage mode, wherein the second preset voltage is greater than the first preset voltage, and the energy storage intensity of the second energy storage mode is greater than the energy storage intensity of the first energy storage mode.

[0093] like Figure 8As shown, the embodiment of the present application provides a household appliance, including a processor 711, a communication interface 712, a memory 713 and a communication bus 714, wherein the processor 711, the communication interface 712, and the memory 713 communicate with each other through the communication bus 714;

[0094] Memory 713, used for storing computer programs;

[0095] The processor 711 is used to implement the driving control method provided by any one of the aforementioned method embodiments when executing the program stored in the memory 713.

[0096] Those skilled in the art will understand that Figure 8 The structure shown in the figure is merely a block diagram of a partial structure related to the present application scheme, and does not constitute a limitation on the household appliance to which the present application scheme is applied. The specific household appliance may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0097] In one embodiment, the drive control device provided by the present application can be implemented in the form of a computer program. The computer program can be Figure 8 The memory of the household appliance can store various program modules constituting the drive control device, for example, Figure 7 The acquisition module 310 and the control module 320 are shown. The computer program composed of various program modules enables the processor to execute the driving control method of each embodiment of the present application described in this specification.

[0098] Figure 8 The household appliances shown can be Figure 7 The acquisition module 310 in the driving control device shown is executed to acquire the bus voltage output by the power factor correction circuit 110 in the driving circuit. The household appliance can execute, through the control module 320, when the bus voltage output by the power factor correction circuit 110 is greater than the first preset voltage, to control the voltage stabilizing circuit 120 in the driving circuit connected to the output end of the power factor correction circuit 110 to operate in the first energy storage mode, wherein the voltage stabilizing circuit 120 operates in the first energy storage mode and is used to store the excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit 110 and the first preset voltage in the film capacitor in the voltage stabilizing circuit 120.

[0099] An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the drive control method provided by any of the aforementioned method embodiments is implemented.

[0100] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0101] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the relevant technology, can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., including a number of instructions for enabling a household appliance (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0102] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative can be used.

[0103] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A drive control method, characterized in that: The method comprises: Obtaining the bus voltage output by the power factor correction circuit in the drive circuit; When the bus voltage output by the power factor correction circuit is greater than a first preset voltage, the voltage stabilizing circuit connected to the output end of the power factor correction circuit in the driving circuit is controlled to operate in a first energy storage mode, wherein the voltage stabilizing circuit operates in the first energy storage mode and is used to store excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit and the first preset voltage in a thin film capacitor in the voltage stabilizing circuit.

2. The method according to claim 1, characterized in that When the bus voltage output by the power factor correction circuit is greater than the first preset voltage, after controlling the voltage stabilizing circuit connected to the output end of the power factor correction circuit in the driving circuit to operate in the first energy storage mode, the method further includes: When the operation time of the voltage stabilizing circuit in the first energy storage mode reaches a first specified time, controlling the voltage stabilizing circuit to operate in the energy release mode, wherein the voltage stabilizing circuit operates in the energy release mode to release the electric energy stored in the film capacitor to supplement the bus voltage output by the power factor correction circuit; When the operating time of the voltage stabilizing circuit in the energy release mode reaches a second specified time, the voltage stabilizing circuit is controlled to operate in the first energy storage mode.

3. The method according to claim 1, characterized in that When the bus voltage output by the power factor correction circuit is greater than a first preset voltage, the method further includes: A load circuit in the drive circuit connected to the output end of the power factor correction circuit is started.

4. The method according to claim 1, characterized in that: When the bus voltage output by the power factor correction circuit is greater than the first preset voltage, after controlling the voltage stabilizing circuit connected to the output end of the power factor correction circuit in the driving circuit to operate in the first energy storage mode, the method further includes: When a shutdown instruction corresponding to the driving circuit is received, the absorption resistor in the voltage stabilizing circuit is controlled to consume the electric energy released by the film capacitor.

5. The method according to claim 1, characterized in that After obtaining the bus voltage output by the power factor correction circuit in the drive circuit, the method further includes: When the bus voltage output by the power factor correction circuit is greater than a second preset voltage, the voltage stabilizing circuit is controlled to operate in a second energy storage mode, wherein the second preset voltage is greater than the first preset voltage, and the energy storage intensity of the second energy storage mode is greater than the energy storage intensity of the first energy storage mode.

6. A drive control device, characterized in that: The drive control device comprises: An acquisition module, used for acquiring the bus voltage output by the power factor correction circuit in the drive circuit; A control module, used for controlling the voltage stabilizing circuit connected to the output end of the power factor correction circuit in the driving circuit to operate in a first energy storage mode when the bus voltage output by the power factor correction circuit is greater than a first preset voltage, wherein the voltage stabilizing circuit operates in the first energy storage mode and is used for storing excess electric energy corresponding to the difference voltage between the bus voltage output by the power factor correction circuit and the first preset voltage in a thin film capacitor in the voltage stabilizing circuit.

7. A driving circuit, characterized in that: The driving circuit includes a power factor correction circuit, a voltage stabilizing circuit and a load circuit. The input end of the power factor correction circuit is used to receive the grid voltage. The output end of the power factor correction circuit is connected to the voltage stabilizing circuit and the load circuit respectively. The voltage stabilizing circuit includes a thin film capacitor, which is used to store excess electric energy corresponding to the difference voltage between the bus voltage and the first preset voltage when the bus voltage output by the power factor correction circuit is greater than the first preset voltage.

8. The driving circuit according to claim 7, characterized in that: The power factor correction circuit includes a rectifier bridge, a first inductor, a first diode, and a first switching tube. The first end of the rectifier bridge is used to receive the grid voltage, the second end of the rectifier bridge is connected to the first end of the first inductor, the second end of the first inductor is respectively connected to the positive electrode of the first diode and the first end of the first switching tube, the cathode of the first diode serves as the first output end of the power factor correction circuit, and is respectively connected to the voltage stabilizing circuit and the load circuit; the second end of the first switching tube serves as the second output end of the power factor correction circuit, and is respectively connected to the third end of the rectifier bridge, the voltage stabilizing circuit, and the load circuit.

9. The driving circuit according to claim 7, characterized in that: The voltage stabilizing circuit includes a second switch tube, a second diode, a second inductor, a third switch tube, a first resistor, a second resistor, the thin film capacitor, a third inductor, a fourth switch tube and a third diode. The first end of the second switch tube is respectively connected to the first output end of the power factor correction circuit and the load circuit, the second end of the second switch tube is respectively connected to the first end of the second inductor and the cathode of the second diode, the second end of the second inductor is respectively connected to the first end of the third switch, the first end of the second resistor and the first end of the third inductor, the second end of the third switch tube is connected to the first end of the first resistor, the second end of the second resistor is connected to the first end of the thin film capacitor, the second end of the third inductor is respectively connected to the first end of the fourth switch tube and the anode of the third diode, the anode of the second diode, the second end of the first resistor, the second end of the thin film capacitor and the second end of the fourth switch tube are commonly connected to the second output end of the power factor correction circuit, and the cathode of the third diode is connected to the first output end of the power factor correction circuit.

10. The driving circuit according to claim 7, characterized in that: The load circuit includes a first load, a first switching circuit for controlling the first load, a second load, and a second switching circuit for controlling the second load. The first switching circuit is connected between the first load and the output end of the power factor correction circuit, and the second switching circuit is connected between the second load and the output end of the power factor correction circuit.

11. A household appliance, characterized in that: The household appliance comprises the drive control device according to claim 6 and the drive circuit according to any one of claims 7 to 10, and the drive control device is used to control the working mode of the drive circuit.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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