Washing machine driving control circuit and control method and device thereof

Abstract

The invention discloses a washing machine drive control circuit and a control method and device thereof. The method comprises the steps that in the rotating process of an inner barrel of the washing machine, the bus voltage and the input voltage of a washing machine driving control circuit are obtained; setting a reference voltage of the washing machine driving control circuit according to the input voltage; and adjusting the bus voltage through a bus voltage stabilization controller in the washing machine driving control circuit so as to enable the voltage difference value between the bus voltage and the reference voltage to be smaller than the voltage difference threshold value. The technical problem that the safety of a driving control circuit device is threatened due to the fact that the bus voltage is too high when the washing machine is braked and stopped in the related technology is solved.

Description

Technical Field

[0001] The present invention relates to the field of electrical engineering technology, and in particular to a washing machine drive control circuit and a control method and device thereof. Background Art

[0002] The washing machine based on variable frequency speed regulation has its AC input converted into DC by a rectifier bridge, and then the capacitor filters out the noise and stabilizes the bus voltage. The inverter inverts the DC into three-phase AC to drive the motor. The motor is connected to the inner drum of the washing machine and drives the inner drum to rotate to complete the washing function. Figure 1 It is a drive control diagram of a variable frequency washing machine according to the prior art, such as Figure 1 As shown in the figure, the washing process of the washing machine is a frequent forward and reverse start and stop state with a cycle of forward start, brake stop, reverse start, and brake stop; and after the dehydration process, the inner drum of the washing machine is braked and stopped at a high speed with load. According to the law of conservation of energy, energy will not disappear out of thin air. In the brake stop state, the kinetic energy of the inner drum of the washing machine drags the motor to rotate. At this time, the motor is equivalent to a generator, and the kinetic energy of the inner drum of the washing machine enters the inverter in the form of electrical energy and flows to the DC side. The electrical energy is continuously accumulated in the capacitor, causing the bus voltage to pump up. Excessive bus voltage will threaten the safety of the drive control circuit components. The electrical energy generated by the brake stop becomes regenerative energy.

[0003] There are three common methods to solve the problem of bus voltage pumping: 1. Storing regenerative energy in batteries or supercapacitors. The frequent start and stop characteristics of washing machines cause the batteries to charge and discharge frequently, which greatly shortens the service life of the batteries; supercapacitors can be charged repeatedly, but the power density is low and the voltage level is low. They need to be used in parallel and are expensive. 2. Feeding regenerative energy back to the grid. The requirements for the electric energy fed back to the grid are relatively stringent. The quality of regenerative energy is generally poor. If the conditions are to be met, a conditioning circuit with a high cost is required, which is not suitable for washing machines. 3. Connecting the brake resistor to the bus to consume regenerative energy is the simplest way, but it will cause the temperature of the control board to rise, which is not conducive to the heat dissipation of the control board, and wastes regenerative energy, which is not conducive to green development. Due to the frequent start and stop characteristics of washing machines, the simple connection and removal of the brake resistor on the bus causes the bus voltage to fluctuate within a certain range, causing the capacitor to charge and discharge frequently, which will cause the capacitor to heat up and affect the service life of the capacitor. The capacitor is generally an electrolytic capacitor, and the aging degree of the electrolytic capacitor will cause the performance of the electrical equipment to degrade.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiment of the present invention provides a washing machine drive control circuit and a control method and device thereof, so as to at least solve the technical problem in the related art that the washing machine brake stop may cause the bus voltage to be too high, thereby threatening the safety of the drive control circuit components.

[0006] According to one aspect of an embodiment of the present invention, a washing machine drive control circuit is provided, comprising: a rectifier module, for converting alternating current input to the washing machine into direct current; a capacitor, connected in parallel with the rectifier module, for filtering the direct current output by the rectifier module to obtain the filtered direct current; an inverter, connected in parallel with the capacitor, for inverting the filtered direct current into adjustable alternating current; a motor, connected to the inverter, for controlling the rotation of the inner drum of the washing machine according to the adjustable alternating current transmitted by the inverter, so as to process the clothes in the inner drum; a bus voltage stabilization controller, connected to the capacitor, for adjusting the bus voltage corresponding to the direct current filtered by the capacitor, so that the voltage difference between the bus voltage and a reference voltage is less than a voltage difference threshold, wherein the reference voltage is a voltage determined according to the input voltage of the washing machine.

[0007] Optionally, the rectifier module includes a plurality of first diodes, and through the on and off states of the plurality of first diodes, the negative half cycle of the alternating current is converted into a positive half cycle, so as to convert the alternating current into the direct current.

[0008] Optionally, the inverter includes a plurality of second diodes, each of which is connected in parallel with a switch tube, wherein the plurality of second diodes connected in parallel with the switch tube are respectively connected to the three-phase voltage of the motor to provide the motor with the adjustable alternating current.

[0009] Optionally, the washing machine drive control circuit further includes: a heating component connected in parallel with the capacitor, for converting the regenerative energy generated by the inner drum in a stop braking state into heat to heat the inner drum.

[0010] Optionally, the washing machine drive control circuit further includes: a discharge circuit switch tube, connected to the heating component and the bus voltage stabilization controller, and used to dynamically adjust the time of connection and disconnection of the discharge circuit so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, wherein the discharge circuit includes the discharge circuit switch tube and the heating component.

[0011] Optionally, the input of the bus voltage stabilization controller is the reference voltage and the bus voltage, and the output of the bus voltage stabilization controller is the duty cycle of the switch tube of the discharge circuit.

[0012] Optionally, the duty cycle is positively correlated with the duration for which the heating component is connected to the bus and the drop speed of the bus voltage.

[0013] Optionally, the washing machine drive control circuit further includes: a temperature sensor, arranged in the inner drum, for obtaining the temperature of the inner drum, wherein the temperature is used to adjust the reference voltage so that when the temperature is higher than a first temperature threshold, the time for which the heating component is connected to the bus is shortened to slow down the temperature rise rate of the inner drum; when the temperature is lower than a second temperature threshold, the time for which the heating component is connected to the bus is extended to accelerate the temperature rise rate of the inner drum.

[0014] According to another aspect of an embodiment of the present invention, a control method for a washing machine drive control circuit is provided, which is applied to any one of the washing machine drive control circuits described above, and comprises: obtaining a bus voltage and an input voltage of the washing machine drive control circuit during rotation of the inner drum of the washing machine; setting a reference voltage of the washing machine drive control circuit according to the input voltage; and adjusting the bus voltage by a bus voltage stabilization controller in the washing machine drive control circuit so that a voltage difference between the bus voltage and the reference voltage is less than a voltage difference threshold.

[0015] Optionally, the control method of the washing machine drive control circuit also includes: acquiring the current temperature of the inner drum; determining the duty cycle of the discharge circuit switch tube in the washing machine drive control circuit according to the temperature difference between the current temperature and the temperature threshold; and determining the duration of the connection of the heating component in the washing machine drive control circuit to the bus according to the duty cycle, so as to maintain the temperature of the inner drum at a predetermined temperature.

[0016] According to another aspect of an embodiment of the present invention, a control device for a washing machine drive control circuit is provided, which is applied to any of the washing machine drive control circuits described above, and includes: a first acquisition module, used to acquire the bus voltage and input voltage of the washing machine drive control circuit during the rotation of the inner drum of the washing machine; a setting module, used to set the reference voltage of the washing machine drive control circuit according to the input voltage; and an adjustment module, used to adjust the bus voltage through a bus voltage stabilization controller in the washing machine drive control circuit so that the voltage difference between the bus voltage and the reference voltage is less than a voltage difference threshold.

[0017] Optionally, the control device of the washing machine drive control circuit also includes: a second acquisition module, used to acquire the current temperature of the inner drum; a first determination module, used to determine the duty cycle of the discharge circuit switch tube in the washing machine drive control circuit according to the temperature difference between the current temperature and the temperature threshold; a second determination module, used to determine the duration of the heating component in the washing machine drive control circuit being connected to the bus according to the duty cycle, so as to maintain the temperature of the inner drum at a predetermined temperature.

[0018] According to another aspect of the embodiments of the present invention, a washing machine is provided. The washing machine uses any one of the above-mentioned control methods for a washing machine driving control circuit.

[0019] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned control methods for a washing machine drive control circuit.

[0020] According to another aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is used to run a program, wherein when the program is run, any one of the above-mentioned control methods for a washing machine drive control circuit is executed.

[0021] According to another aspect of an embodiment of the present invention, a computer program product is provided, comprising computer instructions, wherein the computer instructions are executed by a processor to implement any one of the above-mentioned control methods for a washing machine drive control circuit.

[0022] In an embodiment of the present invention, during the rotation of the inner drum of the washing machine, the bus voltage and input voltage of the washing machine drive control circuit are obtained; the reference voltage of the washing machine drive control circuit is set according to the input voltage; the bus voltage is adjusted by the bus voltage stabilization controller in the washing machine drive control circuit so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold. Through the technical solution provided by the present invention, the bus voltage is stabilized by setting a stable bus voltage controller to maintain the dynamic balance between the bus voltage and the discharge circuit, and the bus voltage pumping and bus voltage stability of the washing machine during the deceleration braking process are avoided, thereby achieving the technical effect of dynamic balance and energy regeneration, improving the energy-saving performance and safety of the washing machine, and thus solving the technical problem in the related art that the bus voltage is too high when the washing machine is braked and stopped, thereby threatening the safety of the drive control circuit components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a drive control diagram of a variable frequency washing machine according to the prior art;

[0025] Figure 2 is a schematic diagram of a washing machine driving control circuit according to an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of drive control of a variable frequency washing machine with parallel heating tubes according to an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a bus voltage stabilization control circuit according to an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of a bus voltage stabilization controller based on a PI controller according to an embodiment of the present invention;

[0029] Figure 6 It is a hardware structure block diagram of a mobile terminal of a control method for a washing machine drive control circuit according to an embodiment of the present invention;

[0030] Figure 7 is a flow chart of a control method of a washing machine driving control circuit according to an embodiment of the present invention;

[0031] Figure 8 is a flow chart of a control method of an optional washing machine driving control circuit according to an embodiment of the present invention;

[0032] Fig. 9 2 is a schematic diagram of a control device of a washing machine driving control circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] As introduced in the background technology, the related art has the defect that the brake stop of the washing machine will cause the bus voltage to be too high, thereby threatening the safety of the drive control circuit components. In an embodiment of the present invention, a washing machine drive control circuit and a control method and device thereof, a washing machine, a computer readable storage medium, a processor and a computer program product are provided.

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] According to one aspect of an embodiment of the present invention, a washing machine driving control circuit is provided. Figure 2 is a schematic diagram of a washing machine driving control circuit according to an embodiment of the present invention. Figure 2 As shown, the washing machine driving control circuit may include: a rectifier module 201, a capacitor 203, a frequency converter 205, a motor 207 and a bus voltage stabilization controller 209. The washing machine driving control circuit is described in detail below.

[0038] The rectifier module 201 is used to convert the alternating current input to the washing machine into direct current.

[0039] It should be noted that the above-mentioned rectifier module, namely the rectifier bridge, is an electronic component used to convert AC power into DC power. It can convert AC input mains power into DC power. It is usually used in power supplies, motor controllers and other circuits that need to convert AC power into DC power. It has the advantages of simple structure, low cost and high efficiency, and is suitable for applications of various power and voltage.

[0040] The capacitor 203 is connected in parallel with the rectifier module and is used to filter the direct current output by the rectifier module to obtain filtered direct current.

[0041] It should be noted that the above-mentioned filtering process is a signal processing technology used to remove noise or unnecessary frequency components in the signal, thereby extracting the required signal information.

[0042] Figure 3 Schematic diagram of the drive control of the inverter washing machine with parallel heating tubes according to an embodiment of the present invention. Figure 3 As shown, the above capacitor is a supporting capacitor. The DC power output by the AC input through the rectifier bridge is a pulsating DC power. The pulsating voltage contains a certain ripple. The supporting capacitor can filter out the ripple voltage and output a stable DC voltage.

[0043] The frequency converter 205 is connected in parallel with the capacitor and is used to invert the filtered DC power into adjustable AC power.

[0044] It should be noted that the frequency converter is an electronic device used to control the motor speed and current. It is used to control the motor speed and torque. It converts direct current into alternating current with adjustable frequency and voltage through an inverter circuit to supply the motor, thereby achieving precise control of the motor.

[0045] It should be noted that capacitors connected in parallel with the inverter can play a filtering role, help reduce harmonics and interference in the output waveform, and improve the waveform quality of the output voltage. At the same time, capacitors can also help improve the power factor of the system and reduce the impact of harmonics on the system.

[0046] The motor 207 is connected to the frequency converter and is used to control the rotation of the inner drum of the washing machine according to the adjustable alternating current transmitted by the frequency converter, so as to process the clothes in the inner drum.

[0047] like Figure 3 As shown, the motor is connected to the inverter and the inner drum of the washing machine. The washing machine motor is one of the core components of the washing machine and is responsible for driving the inner drum of the washing machine to rotate and complete operations such as washing and dehydration.

[0048] The bus voltage stabilization controller 209 is connected to the capacitor and is used to adjust the bus voltage corresponding to the DC power after capacitor filtering so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, wherein the reference voltage is a voltage determined according to the input voltage of the washing machine.

[0049] It should be noted that the bus voltage stabilization controller adjusts the bus voltage based on the reference voltage and the DC voltage after capacitor filtering to keep the bus voltage stable within a preset range, which can ensure that the washing machine obtains a stable voltage supply during operation, thereby improving the stability and performance of the equipment.

[0050] Specifically, the controller continuously detects the difference between the bus voltage and the reference voltage. When the difference is greater than the set voltage difference threshold, the controller will adopt a corresponding control strategy, such as adjusting the voltage output of the capacitor to bring the bus voltage back to the set range. This can effectively avoid excessive bus voltage fluctuations that affect the normal operation of the equipment.

[0051] As can be seen from the above, in the embodiment of the present invention, a rectifier module can be provided in the driving control circuit of the washing machine, for converting the alternating current input to the washing machine into direct current; and a capacitor can be provided in the driving control circuit of the washing machine, connected in parallel with the rectifier module, for filtering the direct current output by the rectifier module to obtain the filtered direct current; a frequency converter can be provided, connected in parallel with the capacitor, for inverting the filtered direct current into adjustable alternating current; and a motor can be provided, connected to the frequency converter, for controlling the rotation of the inner drum of the washing machine according to the adjustable alternating current transmitted by the frequency converter, so as to process the clothes in the inner drum; A bus voltage stabilization controller is provided and connected to the capacitor, and is used to adjust the bus voltage corresponding to the direct current after capacitor filtering so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, wherein the reference voltage is a voltage determined according to the input voltage of the washing machine. The purpose of maintaining the dynamic balance between the bus voltage and the discharge circuit by setting a stable bus voltage controller, avoiding the bus voltage pumping up and maintaining the bus voltage stable during the speed reduction braking process of the washing machine is achieved, thereby achieving the technical effects of dynamic balance and energy regeneration and improving the energy saving performance and safety of the washing machine.

[0052] The technical solution provided by the embodiment of the present invention solves the technical problem in the related art that the washing machine braking stop may cause the bus voltage to be too high, thereby threatening the safety of the driving control circuit components.

[0053] According to the above embodiment of the present invention, the rectifier module includes a plurality of first diodes, and the negative half cycle of the alternating current is converted into a positive half cycle through the on and off states of the plurality of first diodes, so as to convert the alternating current into direct current.

[0054] In this embodiment, the rectifier module can convert AC power into DC power for driving the motor or other electronic components. Through the conduction and cutoff states of multiple first diodes, the negative half-cycle of AC power can be converted into the positive half-cycle, thereby achieving current control and stabilization, ensuring that the motor or other components of the washing machine can obtain a stable DC power supply, thereby achieving normal operation.

[0055] It should be noted that a rectifier bridge is usually composed of four diodes (i.e., the first diode), which are arranged in a bridge structure to achieve full-wave rectification of AC signals. The diodes will be turned on in turn according to the direction of the input signal, so that the waveform of the output signal is unidirectional, that is, a DC signal, which is widely used in various electronic devices, such as power adapters, transformers, DC power supplies, etc.

[0056] like Figure 3 As shown, in the rectifier bridge, four diodes are connected into a bridge structure, two of which are connected to the current path of the positive half cycle, and the other two are connected to the current path of the negative half cycle. When AC power is input into the rectifier bridge, it will cause the diodes therein to conduct alternately, so that the output current direction is always forward, thereby realizing the function of converting AC power into DC power.

[0057] According to the above embodiment of the present invention, the inverter includes multiple second diodes, each of which is connected in parallel with a switching tube, wherein the multiple second diodes connected in parallel with the switching tube are respectively connected to the three-phase voltage of the motor to provide adjustable alternating current for the motor.

[0058] In this embodiment, the inverter can control the speed of the motor by adjusting the frequency and voltage of the alternating current to change the speed of the motor to meet different washing requirements of the washing machine. When the washing machine is working, by controlling the switching tube and the second diode in the inverter, the motor can be started, accelerated, decelerated and stopped, thereby achieving normal operation and efficient washing of the washing machine.

[0059] like Figure 3 As shown, the frequency converter uses a switch tube to control the conduction and cutoff of multiple diodes (i.e., the second diode) to adjust the output voltage and frequency of the motor. Each diode is connected in parallel with a switch tube, and the conduction state of the second diode is controlled by controlling the conduction state of the switch tube, thereby controlling the output voltage and frequency of the motor.

[0060] According to the above embodiment of the present invention, the washing machine drive control circuit further includes: a heating component connected in parallel with the capacitor, which is used to convert the regenerative energy generated by the inner drum in the stop braking state into heat to heat the inner drum.

[0061] In this embodiment, the heating component is connected in parallel with the capacitor and can convert the regenerative energy generated by the inner drum in the stop braking state into heat to heat the inner drum. This can help the washing machine maintain the temperature of the inner drum in the stop state and prevent the clothes from getting cold during the stop period. It can also save energy and improve the efficiency of the washing machine.

[0062] It should be noted that experiments have shown that hot water can increase the activity of detergents, making oil stains on clothes easier to peel and remove, and can also make clothes fluffier and softer, so the washing effect of the washing machine drum is better when it is heated.

[0063] According to the above embodiment of the present invention, the washing machine drive control circuit further includes: a discharge circuit switch tube, connected to the heating component and the bus voltage stabilization controller, and used to dynamically adjust the time of connection and disconnection of the discharge circuit so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, wherein the discharge circuit includes the discharge circuit switch tube and the heating component.

[0064] It should be noted that the above-mentioned discharge circuit switch tube is also called a drain switch tube, which is an electronic device used to control the switching operation in the circuit. It is usually composed of a switch tube and a control circuit to control the flow and blocking of current. It can be used in various electronic devices to control the flow of current in the circuit by controlling the conduction and cutoff of the tube. When the tube is in the on state, the current can flow through the tube; when the tube is in the off state, the current cannot flow through the tube. The conduction and cutoff of the control tube are usually controlled by external signals or voltages to realize the switching operation of the circuit.

[0065] In this embodiment, the discharge circuit switch tube can dynamically adjust the connection and disconnection time of the discharge circuit to ensure that the bus voltage is stable near the reference voltage. By controlling the working state of the discharge circuit, the load of the circuit can be effectively adjusted, so that the washing machine can operate stably during operation and improve its performance and efficiency. In addition, the heating power of the heating component can also be adjusted through the control circuit to meet different washing needs.

[0066] like Figure 3 As shown, the discharge circuit switch tube is connected to the heating component and the bus voltage stabilization controller. The discharge circuit can apply the regenerative energy generated by the braking shutdown to the heating tube to heat the washing water to prevent the bus voltage from rising too high. At the same time, hot water can increase the activity of the detergent, making it easier to peel and remove oil stains on clothes, and making the clothes fluffy and soft.

[0067] According to the above embodiment of the present invention, the input of the bus voltage stabilization controller is the reference voltage and the bus voltage, and the output of the bus voltage stabilization controller is the duty cycle of the switch tube of the discharge circuit.

[0068] In this embodiment, the bus voltage stabilization controller can ensure that the washing machine motor can work normally under a stable voltage to avoid unstable operation or damage of the motor due to voltage fluctuations. By monitoring the bus voltage and adjusting the duty cycle of the discharge circuit switch tube according to the reference voltage, the current and speed of the motor are controlled to ensure the normal operation of the washing machine, thereby improving the performance and stability of the washing machine and extending the service life of the washing machine.

[0069] Figure 4 is a schematic diagram of a stable bus voltage control circuit according to an embodiment of the present invention, such as Figure 4 As shown, the bus voltage stabilization control circuit has two inputs (reference voltage and bus voltage) and one output (discharge circuit switch duty cycle). The bus voltage stabilization controller dynamically adjusts the connection and disconnection time of the discharge circuit by outputting the discharge circuit switch duty cycle to keep the bus voltage stable at the reference voltage.

[0070] It should be noted that the above-mentioned bus voltage stabilization controller dynamically adjusts the connection and disconnection time of the discharge circuit by outputting the duty cycle of the discharge circuit switch tube, maintains the dynamic balance between the bus voltage and the discharge circuit, and thus keeps the bus voltage stable at the reference voltage.

[0071] According to the above embodiment of the present invention, the duty cycle is positively correlated with the duration of the heating component being connected to the bus and the drop speed of the bus voltage.

[0072] In this embodiment, the positive correlation between the duty cycle, the length of time the heating component is connected to the bus, and the drop rate of the bus voltage can be used to control the heating function of the washing machine. By adjusting the duty cycle and the length of time the heating component is connected to the bus, the working time and power of the heating component can be controlled, thereby achieving precise control of the heating function of the washing machine. At the same time, monitoring the drop rate of the bus voltage can be used to determine the power consumption of the heating component to ensure the normal operation of the washing machine and avoid overload, thereby improving the heating efficiency and safety of the washing machine.

[0073] Figure 5 is a schematic diagram of a bus voltage stabilization controller based on a PI controller according to an embodiment of the present invention, such as Figure 5 As shown, the bus voltage stabilization controller can be a PI controller (Proportional-Integral Controller), which makes a difference between the two input signals of the reference voltage Uref and the bus voltage Udc to obtain the error voltage Uerror. If the error voltage Uerror is positive, it means that the bus voltage is too small. The duty cycle D of the switch tube can be appropriately reduced, and the time when the heating tube is connected to the bus can be reduced to allow the bus voltage Udc to rise back to the reference voltage Uref; if the error voltage Uerror is negative, it means that the bus voltage is too large. The duty cycle D of the switch tube can be appropriately increased, and the time when the heating tube is connected to the bus can be extended to allow the bus voltage Udc to fall back to the reference voltage Uref. The PI controller dynamically adjusts the time when the discharge circuit is connected and removed by outputting the duty cycle of the discharge circuit switch tube to keep the bus voltage stable at the reference voltage. Its parameters Kp and Ki can be debugged to more appropriate values ​​in the experiment.

[0074] It should be noted that the above-mentioned reference voltage Uref can be set slightly higher than the input voltage Uin*1.414, reserving appropriate pump-up voltage space within the safe voltage range when the washing machine decelerates and brakes. For example, the reference voltage Uref is the input voltage Uin*1.414*1.2; the above-mentioned bus voltage Udc is the real-time bus voltage value obtained by sampling on the bus.

[0075] It should be noted that the duty cycle D of the above-mentioned discharge circuit switch tube is the duty cycle input to the discharge circuit switch tube. If the duty cycle is relatively large, the heating tube is connected to the bus for a longer time and the bus voltage drops faster; if the duty cycle is relatively small, the heating tube is connected to the bus for a shorter time and the bus voltage drops slower. Therefore, the duty cycle D can be controlled to dynamically adjust the time for connecting and disconnecting the heating tube to keep the bus voltage stable.

[0076] In addition, it should be noted that the above-mentioned PI controller is a commonly used controller type, which is used to control the process in the system, and includes two parts: a proportional controller (P controller) and an integral controller (I controller). Among them, the P controller adjusts the output of the controller according to the deviation between the system output and the set value, and controls the size of the output signal through the proportional coefficient. The P controller can respond quickly to changes in the system, but may cause overshoot and oscillation of the system; the I controller adjusts the output of the controller according to the cumulative error between the system output and the set value, and controls the size of the output signal through the integral coefficient. The I controller can eliminate the static error of the system and improve the stability of the system, but may cause the response speed of the system to slow down.

[0077] According to the above embodiment of the present invention, the washing machine drive control circuit further includes: a temperature sensor, which is arranged in the inner drum and is used to obtain the temperature of the inner drum, wherein the temperature is used to adjust the reference voltage so that when the temperature is higher than the first temperature threshold, the time for which the heating component is connected to the bus is shortened to slow down the temperature rise rate of the inner drum; when the temperature is lower than the second temperature threshold, the time for which the heating component is connected to the bus is extended to accelerate the temperature rise rate of the inner drum.

[0078] It should be noted that the above-mentioned temperature sensor is usually installed at the bottom or side of the inner drum of the washing machine, close to the heating pipe, which can ensure that the sensor can accurately detect the temperature of the washing water.

[0079] In this embodiment, the temperature sensor can monitor the temperature of the inner drum. Through real-time monitoring of the temperature of the inner drum, the time for which the heating component is connected to the busbar can be adjusted according to the set first and second temperature thresholds, thereby controlling the temperature rise rate of the inner drum. When the temperature of the inner drum is higher than the first temperature threshold, the time for which the heating component is connected to the busbar is shortened, the temperature rise rate of the inner drum is slowed down, and the inner drum is protected from overheating; when the temperature of the inner drum is lower than the second temperature threshold, the time for which the heating component is connected to the busbar is extended, the temperature rise rate of the inner drum is accelerated, the working efficiency of the washing machine is improved, and the inner drum can be protected and the temperature adjusted.

[0080] From the above, it can be seen that in an embodiment of the present invention, a stable bus voltage controller is provided to maintain a dynamic balance between the bus voltage and the discharge circuit, thereby avoiding the bus voltage pumping up and maintaining the bus voltage stable during the speed reduction braking process of the washing machine. At the same time, a heating tube is connected in parallel to the bus support capacitor, and the regenerative energy generated by the braking shutdown is converted into heat in the inner drum through the heating tube, thereby improving the washing effect. The entire control process can keep the bus voltage within a safe range, thereby avoiding the bus voltage being too high during the braking shutdown and thus endangering the safety of the device. At the same time, the bus voltage is maintained at a reference voltage value, suppressing repeated fluctuations in the bus voltage and frequent charging and discharging of the support capacitor, suppressing the heating of the support capacitor, and extending the service life of the support capacitor. On the other hand, the regenerated energy is recycled and utilized, which plays a role in green environmental protection and can also improve the washing effect of the washing machine.

[0081] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 6 FIG. 1 is a hardware structure block diagram of a mobile terminal of a method for controlling a washing machine drive control circuit according to an embodiment of the present invention. Figure 6 As shown, the mobile terminal may include one or more ( Figure 6 Only one is shown in the figure) a processor 602 (the processor 602 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 604 for storing data, wherein the mobile terminal may also include a transmission device 606 and an input / output device 608 for communication functions. It can be understood by those skilled in the art that Figure 6 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 6 More or fewer components as shown, or with Figure 6 Different configurations are shown.

[0082] The memory 604 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the control method of the washing machine drive control circuit in the embodiment of the present invention. The processor 602 executes various functional applications and data processing by running the computer program stored in the memory 604, that is, the above method is implemented. The memory 604 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 604 may further include a memory remotely arranged relative to the processor 602, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 606 is used to receive or send data via a network. The above-mentioned specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 606 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 606 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0083] According to an embodiment of the present invention, a method embodiment of a control method for a washing machine drive control circuit is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0084] Figure 7 FIG. 1 is a flow chart of a control method of a washing machine driving control circuit according to an embodiment of the present invention. Figure 7 As shown, the method comprises the following steps:

[0085] Step S702, while the inner drum of the washing machine is rotating, obtaining the bus voltage and input voltage of the driving control circuit of the washing machine.

[0086] In this embodiment, by acquiring the bus voltage and input voltage of the washing machine drive control circuit, the working state and stability of the circuit can be monitored, and the obtained data can be used to adjust the working parameters of the circuit to ensure that the rotation speed and direction of the inner drum of the washing machine meet the preset requirements. By adjusting the circuit through the control method, the working efficiency and performance of the washing machine can be improved, while ensuring the safety and stability of the washing machine.

[0087] Step S704: setting a reference voltage of the washing machine driving control circuit according to the input voltage.

[0088] In this embodiment, setting the reference voltage of the washing machine drive control circuit according to the input voltage can ensure that the circuit can work normally under different voltages, ensure that the washing machine can operate stably under different voltages, and avoid damage to the circuit or affecting the normal operation of the washing machine due to voltage fluctuations. Setting the reference voltage can help the circuit accurately control the various functions of the washing machine. By setting the reference voltage according to the input voltage, it can ensure that the washing machine can operate according to the set program under different working environments, thereby improving the performance and stability of the washing machine.

[0089] Step S706: The bus voltage is adjusted by a bus voltage stabilization controller in the washing machine drive control circuit so that the voltage difference between the bus voltage and the reference voltage is less than a voltage difference threshold.

[0090] In this embodiment, by adjusting the bus voltage, the washing machine can be prevented from being damaged or malfunctioning due to voltage fluctuations. At the same time, by adjusting the bus voltage through the controller, the efficiency and performance of the washing machine can be improved, its service life can be extended, and the bus voltage can be kept stable within a suitable range to ensure the normal operation of the washing machine.

[0091] Figure 8 is a flow chart of a control method of an optional washing machine drive control circuit according to an embodiment of the present invention, such as Figure 8 As shown, after the washing machine starts to rotate the inner drum, the bus voltage Udc and the input voltage Uin are detected, the reference voltage is set according to the input voltage, the bus voltage is adjusted by the bus voltage stabilization controller, and the connection and disconnection time of the discharge circuit is dynamically adjusted by the duty cycle of the output discharge circuit switch tube to keep the bus voltage stable at the reference voltage.

[0092] As can be seen from the above, in the embodiment of the present invention, during the rotation of the inner drum of the washing machine, the bus voltage and the input voltage of the washing machine drive control circuit are obtained; the reference voltage of the washing machine drive control circuit is set according to the input voltage; the bus voltage is adjusted by the bus voltage stabilization controller in the washing machine drive control circuit so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, thereby achieving the goal of maintaining a dynamic balance between the bus voltage and the discharge circuit by setting a stable bus voltage controller, avoiding the bus voltage pumping up and maintaining the bus voltage stability during the speed reduction braking process of the washing machine, and at the same time, connecting a heating tube in parallel to the bus support capacitor to convert the regenerative energy generated by the braking shutdown into heat in the inner drum through the heating tube, thereby achieving the technical effect of dynamic balance and energy regeneration, and improving the energy saving performance and safety of the washing machine.

[0093] The technical solution provided by the embodiment of the present invention solves the technical problem in the related art that the washing machine braking stop may cause the bus voltage to be too high, thereby threatening the safety of the driving control circuit components.

[0094] According to the above embodiment of the present invention, the control method of the washing machine drive control circuit also includes: obtaining the current temperature of the inner drum; determining the duty cycle of the discharge circuit switch tube in the washing machine drive control circuit according to the temperature difference between the current temperature and the temperature threshold; determining the duration of the connection of the heating component in the washing machine drive control circuit to the bus according to the duty cycle, so as to maintain the temperature of the inner drum at a predetermined temperature.

[0095] like Figure 8 As shown, after the washing machine starts to rotate the inner drum, the inner drum temperature T (ie, the current temperature) is also detected, and the duty cycle of the discharge circuit switch tube is determined according to the temperature difference between the current temperature and the temperature threshold, thereby setting the reference voltage.

[0096] In this embodiment, the working time of the heating component can be automatically adjusted according to the current temperature of the inner drum to keep the temperature of the inner drum within the set predetermined temperature range. By monitoring the temperature of the inner drum in real time and adjusting the duty cycle of the discharge circuit switch tube according to the temperature difference, the working time of the heating component can be effectively controlled, thereby realizing the temperature control of the inner drum of the washing machine and improving the washing effect and energy-saving performance of the washing machine.

[0097] It should be noted that if the washing temperature is too high, it may damage the clothes. For example, wool-viscose fabrics will have poor color fastness when the temperature is too high.

[0098] Specifically, in order to make the temperature of the inner drum within a suitable temperature range, a temperature sensor is arranged in the inner drum. If the temperature of the inner drum is high, the reference voltage Uref can be appropriately increased within the safe voltage range, for example, the input voltage Uin*1.414*1.3, which can reduce the duty cycle D of the discharge circuit switch tube, reduce the time for the heating tube to be connected to the bus, and delay the heating of the inner drum; if the temperature of the inner drum is low, the reference voltage Uref can be appropriately reduced, for example, the input voltage Uin*1.414*1.1, which can increase the duty cycle D of the discharge circuit switch tube, extend the time for the heating tube to be connected to the bus, and accelerate the heating of the inner drum. The reference voltage Uref is adaptively adjusted according to the inner drum temperature T, which can avoid the inner drum temperature being too high to damage the clothes, and keep the clothes within the appropriate temperature range to maintain a good washing effect.

[0099] It should be noted that the above-mentioned suitable temperature range can be set according to the material of the clothes to be washed. For example, the temperature range for cotton and linen washing is 60℃-90℃, the temperature range for mixed washing is 40℃-60℃, and the temperature range for wool washing is 30℃-40℃.

[0100] Among them, the above-mentioned higher inner drum temperature can be set according to the upper limit value of the washing program temperature range multiplied by 0.9. For example, if mixed washing is selected, the appropriate temperature range is 40℃-60℃, and the higher one can be 60*0.9=54. The temperature greater than 54 degrees is considered higher.

[0101] Similarly, the above-mentioned lower inner drum temperature can be set according to the lower limit of the washing program temperature range multiplied by 1.1. For example, if mixed washing is selected, the appropriate temperature range is 40℃-60℃, and the lower one can be 40*1.1=44. The temperature less than degrees is considered low.

[0102] The specific methods of increasing the reference voltage and reducing the duty cycle of the discharge circuit switch tube are as follows: Under normal circumstances, the reference voltage Uref is set to Uin*1.414*1.2; when the temperature of the inner tube is higher, the reference voltage Uref is set to Uin*1.414*1.3; when the temperature of the inner tube is lower, the reference voltage Uref is set to Uin*1.414*1.1; the larger the duty cycle D of the discharge circuit switch tube, the longer the heating tube is powered on, and the faster the inner tube heats up.

[0103] The reasons for adjusting in the above manner are as follows: when the temperature of the inner cylinder is high, the set reference voltage Uref is also high, and a relatively large part of the regenerative energy generated by the brake shutdown can flow to the bus voltage, and the part flowing to the heating tube is correspondingly reduced, thereby suppressing the inner cylinder from overheating; when the temperature of the inner cylinder is low, the set reference voltage Uref is also low, and a relatively small part of the regenerative energy generated by the brake shutdown flows to the bus voltage, and the part flowing to the heating tube is correspondingly increased, thereby enabling the inner cylinder to heat up faster.

[0104] In addition, it should be noted that in order to ensure the safety of the supporting capacitor and the inverter switching tube, the bus voltage must be kept within the safe voltage range. The safe voltage usage range is marked in the device specification.

[0105] The technical solution provided by the above embodiment of the present invention solves the problem of excessive bus voltage caused by the brake shutdown of the washing machine, maintains the bus voltage stable, and inhibits the aging of the supporting capacitor. On the other hand, it recycles and utilizes the regenerated energy, plays a role of green environmental protection, and can also improve the washing effect of the washing machine. At the same time, it has the following beneficial effects: the entire control process can keep the bus voltage within a safe range, avoids the excessive bus voltage during the brake shutdown and thus endangers the safety of the device, and recycles and utilizes the regenerated energy, plays a role of green environmental protection, and can also improve the washing effect of the washing machine.

[0106] That is, the technical solution provided by the embodiment of the present invention comprehensively considers various factors, and controls the relationship between the bus voltage and the discharge circuit by setting a stable bus voltage controller, thereby avoiding the bus voltage pumping up and maintaining the bus voltage stability during the speed reduction process of the washing machine, and inhibiting the aging of the supporting capacitor. On the other hand, a heating tube is connected in parallel to the bus supporting capacitor to convert the regenerative energy generated by the braking shutdown into heat in the inner drum through the heating tube, thereby improving the cleaning effect.

[0107] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0109] According to an embodiment of the present invention, a control device for a washing machine drive control circuit for implementing the control method of the washing machine drive control circuit is also provided. Fig. 9 is a schematic diagram of a control device of a washing machine driving control circuit according to an embodiment of the present invention. Fig. 9 As shown, the device includes: a first acquisition module 901, a setting module 903 and an adjustment module 905. The control of the washing machine drive control circuit is described below.

[0110] The first acquisition module 901 is used to acquire the bus voltage and input voltage of the driving control circuit of the washing machine during the rotation of the inner drum of the washing machine.

[0111] The setting module 903 is used to set the reference voltage of the washing machine driving control circuit according to the input voltage.

[0112] The regulating module 905 is used to regulate the bus voltage through the bus voltage stabilization controller in the washing machine drive control circuit so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold.

[0113] It should be noted here that the above-mentioned first acquisition module 901, setting module 903 and adjustment module 905 correspond to steps S702 to S706 in the above-mentioned embodiment, and the three modules and the corresponding steps implement the same instances and application scenarios, but are not limited to the contents disclosed in the above-mentioned embodiment.

[0114] As can be seen from the above, in the scheme recorded in the above-mentioned embodiment of the present invention, first, the first acquisition module can be used to obtain the bus voltage and input voltage of the washing machine drive control circuit during the rotation of the inner drum of the washing machine; then the setting module can be used to set the reference voltage of the washing machine drive control circuit according to the input voltage; finally, the adjustment module can be used to adjust the bus voltage through the bus voltage stabilization controller in the washing machine drive control circuit, so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, thereby achieving the goal of maintaining the dynamic balance between the bus voltage and the discharge circuit by setting a stable bus voltage controller, avoiding the bus voltage pumping up and maintaining the bus voltage stability during the speed reduction braking process of the washing machine, and at the same time, connecting a heating tube in parallel to the bus support capacitor to convert the regenerative energy generated by the braking shutdown into heat in the inner drum through the heating tube, thereby achieving the technical effect of dynamic balance and energy regeneration, and improving the energy saving performance and safety of the washing machine.

[0115] The technical solution provided by the embodiment of the present invention solves the technical problem in the related art that the washing machine braking stop may cause the bus voltage to be too high, thereby threatening the safety of the driving control circuit components.

[0116] In an optional embodiment, the control device of the washing machine drive control circuit also includes: a second acquisition module, used to obtain the current temperature of the inner drum; a first determination module, used to determine the duty cycle of the discharge circuit switch tube in the washing machine drive control circuit according to the temperature difference between the current temperature and the temperature threshold; a second determination module, used to determine the duration of the heating component in the washing machine drive control circuit connected to the bus according to the duty cycle, so as to maintain the temperature of the inner drum at a predetermined temperature.

[0117] According to another aspect of the embodiments of the present invention, a washing machine is provided. The washing machine uses any one of the above control methods for the washing machine driving control circuit.

[0118] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned control methods for a washing machine drive control circuit is executed.

[0119] According to another aspect of an embodiment of the present invention, a computer program product is provided, including computer instructions, where the computer instructions are executed by a processor to implement any one of the above-mentioned control methods for a driving control circuit of a washing machine.

[0120] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium comprising a stored program, wherein the program executes any one of the above control methods for a driving control circuit of a washing machine.

[0121] Optionally, in this embodiment, the computer-readable storage medium may be located in any one of the computer terminals in a computer terminal group in a computer network, or in any one of the communication devices in a communication device group.

[0122] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the bus voltage and input voltage of the washing machine drive control circuit during the rotation of the inner drum of the washing machine; setting the reference voltage of the washing machine drive control circuit according to the input voltage; and adjusting the bus voltage through the bus voltage stabilization controller in the washing machine drive control circuit so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold.

[0123] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the current temperature of the inner drum; determining the duty cycle of the discharge circuit switch tube in the washing machine drive control circuit according to the temperature difference between the current temperature and the temperature threshold; determining the length of time that the heating component in the washing machine drive control circuit is connected to the bus according to the duty cycle, so as to maintain the temperature of the inner drum at a predetermined temperature.

[0124] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0125] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0126] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0127] 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 units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0128] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0129] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0130] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A washing machine drive control circuit, characterized in that: include: A rectifier module, used to convert the AC power input to the washing machine into DC power; A capacitor connected in parallel with the rectifier module and used for filtering the DC power output by the rectifier module to obtain the filtered DC power; A frequency converter, connected in parallel with the capacitor, for converting the filtered DC power into adjustable AC power; a motor connected to the frequency converter, and used to control the rotation of the inner drum of the washing machine according to the adjustable alternating current delivered by the frequency converter, so as to process the clothes in the inner drum; A bus voltage stabilization controller is connected to the capacitor and is used to adjust the bus voltage corresponding to the direct current after filtering by the capacitor so that the voltage difference between the bus voltage and a reference voltage is less than a voltage difference threshold, wherein the reference voltage is a voltage determined according to the input voltage of the washing machine.

2. The washing machine drive control circuit according to claim 1, characterized in that: The rectifier module includes a plurality of first diodes, and the negative half cycle of the alternating current is converted into a positive half cycle through the on and off states of the plurality of first diodes, so as to convert the alternating current into the direct current.

3. The washing machine drive control circuit according to claim 1, characterized in that: The inverter includes a plurality of second diodes, each of which is connected in parallel with a switch tube, wherein the plurality of second diodes connected in parallel with the switch tube are respectively connected to the three-phase voltage of the motor to provide the motor with the adjustable alternating current.

4. The washing machine drive control circuit according to claim 1, characterized in that: Also includes: The heating component is connected in parallel with the capacitor and is used to convert the regenerative energy generated by the inner drum in a stop braking state into heat so as to heat the inner drum.

5. The washing machine drive control circuit according to claim 4, characterized in that: Also includes: A discharge circuit switch tube is connected to the heating component and the bus voltage stabilization controller, and is used to dynamically adjust the time of connection and disconnection of the discharge circuit so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, wherein the discharge circuit includes the discharge circuit switch tube and the heating component.

6. The washing machine driving control circuit according to claim 5, characterized in that: The input of the bus voltage stabilization controller is the reference voltage and the bus voltage, and the output of the bus voltage stabilization controller is the duty cycle of the switch tube of the discharge circuit.

7. The washing machine drive control circuit according to claim 6, characterized in that: The duty cycle is positively correlated with the duration of the heating component being connected to the bus and the drop speed of the bus voltage.

8. The washing machine driving control circuit according to claim 6, characterized in that: Also includes: A temperature sensor is arranged in the inner tube and is used to obtain the temperature of the inner tube, wherein the temperature is used to adjust the reference voltage so that when the temperature is higher than a first temperature threshold, the time for which the heating component is connected to the busbar is shortened to slow down the temperature rise rate of the inner tube; when the temperature is lower than a second temperature threshold, the time for which the heating component is connected to the busbar is extended to accelerate the temperature rise rate of the inner tube.

9. A control method for a washing machine drive control circuit, characterized in that: A washing machine drive control circuit applied to any one of claims 1 to 8, comprising: During the rotation of the inner drum of the washing machine, obtaining a bus voltage and an input voltage of the driving control circuit of the washing machine; Setting a reference voltage of the washing machine drive control circuit according to the input voltage; The bus voltage is adjusted by a bus voltage stabilization controller in the washing machine drive control circuit so that a voltage difference between the bus voltage and the reference voltage is smaller than a voltage difference threshold.

10. The control method of the washing machine driving control circuit according to claim 9, characterized in that: Also includes: Obtaining the current temperature of the inner cylinder; Determining a duty cycle of a discharge circuit switch tube in the washing machine drive control circuit according to a temperature difference between the current temperature and a temperature threshold; The duration of time for which a heating component in the driving control circuit of the washing machine is connected to a bus is determined according to the duty cycle, so that the temperature of the inner drum is maintained at a predetermined temperature.

11. A control device for a washing machine driving control circuit, characterized in that: A washing machine drive control circuit applied to any one of claims 1 to 8, comprising: A first acquisition module, used for acquiring a bus voltage and an input voltage of a driving control circuit of the washing machine during rotation of the inner drum of the washing machine; A setting module, used for setting a reference voltage of the washing machine driving control circuit according to the input voltage; The regulating module is used to regulate the bus voltage through the bus voltage stabilization controller in the washing machine drive control circuit so that the voltage difference between the bus voltage and the reference voltage is less than a voltage difference threshold.

12. A washing machine, characterized in that: The washing machine uses the control method of the washing machine driving control circuit described in claim 9 or 10.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the control method of the washing machine drive control circuit as claimed in claim 9 or 10.

14. A processor, characterized in that: The processor is used to run a program, wherein the program executes the control method of the washing machine drive control circuit described in claim 9 or 10 when running.

15. A computer program product comprising computer instructions, characterized in that When the computer instructions are executed by the processor, the control method of the washing machine drive control circuit described in claim 9 or 10 is executed.

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