Washing machine drive control circuit and control method and device thereof

Abstract

The application discloses a washing machine driving control circuit and a control method and device thereof. The method comprises the following steps: acquiring a bus voltage and an input voltage of the washing machine driving control circuit during rotation of an inner drum of the washing machine; 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 stabilizing controller in the washing machine driving control circuit, so that a voltage difference between the bus voltage and the reference voltage is less than a voltage difference threshold. The application solves the technical problem that the bus voltage is too high due to the brake stop of the washing machine in the related art, and the safety of the driving control circuit device is threatened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical engineering, in particular to a washing machine driving control circuit and a control method and device thereof. BACKGROUND

[0002] The washing machine based on variable frequency speed regulation converts the AC input into DC through a rectifier bridge, filters out the noise and stabilizes the bus voltage, and the inverter converts the DC into three-phase AC to drive the motor, the motor is connected with the inner drum of the washing machine and drives the inner drum to rotate to complete the washing function, Figure 1 is the driving control diagram of the variable frequency washing machine according to the prior art, as shown in Figure 1 , the washing cycle of the washing machine is in a frequent forward and reverse rotation start-stop state with forward rotation start, braking stop, reverse rotation start, and braking stop as a cycle; and after the dehydration cycle of the washing machine ends, the inner drum stops with high speed and load braking. According to the law of conservation of energy, energy cannot disappear into thin air. In the braking stop state, the kinetic energy of the inner drum of the washing machine drives the motor to rotate. At this time, the motor is equivalent to a generator, which converts the kinetic energy of the inner drum of the washing machine into electric energy and flows to the DC side of the inverter. The continuous accumulation of electric energy in the capacitor causes the bus voltage to pump up, and the excessively high bus voltage will threaten the safety of the driving control circuit device. The electric energy generated by braking stop is regenerative energy.

[0003] The conventional methods to solve the bus voltage pump-up are as follows: 1. Store the regenerative energy with a storage battery or a super capacitor. The characteristics of the washing machine are frequent start and stop, which will cause the storage battery to be charged and discharged frequently, which will greatly shorten the service life of the storage battery. The super capacitor can be repeatedly charged, but the power density is low, the voltage level is low, multiple parallel connections are required, and the price is high. 2. Feedback the regenerative energy to the power grid. The requirement for the electric energy of the feedback power grid is relatively high. The quality of the regenerative energy is generally poor. If the conditions are to be met, a large cost adjustment circuit is required, which is not suitable for washing machines. 3. Connect the braking resistor to the bus to consume the regenerative energy, which is the simplest way, but will cause the temperature of the control panel to rise, which is not conducive to the heat dissipation of the control panel, and wastes the regenerative energy, which is not conducive to green development. Due to the characteristics of the washing machine, the braking resistor is simply connected and removed on the bus, which causes the bus voltage to fluctuate within a certain range, causing the capacitor to be charged and discharged 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] At present, there is no effective solution to the above problems. SUMMARY

[0005] Embodiments of the present application provide a washing machine drive control circuit and a control method and device thereof, to at least solve the technical problem that the brake stop of the washing machine in the related art causes the bus voltage to be too high, and thus threatens the safety of the drive control circuit device.

[0006] According to an aspect of the embodiments of the present application, a washing machine drive control circuit is provided, comprising: a rectifier module, configured to convert alternating current input to the washing machine into direct current; a capacitor, connected in parallel with the rectifier module, configured to perform filtering processing on the direct current output by the rectifier module, to obtain filtered direct current; an inverter, connected in parallel with the capacitor, configured to invert the filtered direct current into adjustable alternating current; a motor, connected with the inverter, configured to control rotation of an inner drum of the washing machine according to the adjustable alternating current delivered by the inverter, to process clothes in the inner drum; and a bus voltage stabilizing controller, connected with the capacitor, configured to adjust a bus voltage corresponding to the direct current filtered by the capacitor, so that a 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 an input voltage of the washing machine.

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

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

[0009] Optionally, the washing machine drive control circuit further comprises a heating component, connected in parallel with the capacitor, configured to convert regenerative energy generated by the inner drum in a brake stop state into heat, to heat the inner drum.

[0010] Optionally, the washing machine drive control circuit further comprises a bleed circuit switch tube, connected with the heating component and the bus voltage stabilizing controller, configured to dynamically adjust a time of access and removal of a bleed circuit, so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, wherein the bleed circuit comprises the bleed circuit switch tube and the heating component.

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

[0012] Optionally, the duty cycle is positively correlated with both the length of time the heating component is connected to the bus and the rate of drop of the bus voltage.

[0013] Optionally, the washing machine drive control circuit further comprises a temperature sensor arranged in the inner drum and configured to obtain a temperature of the inner drum, wherein the temperature is used to adjust the reference voltage, so as to shorten the length of time the heating component is connected to the bus when the temperature is higher than a first temperature threshold, thereby delaying the temperature rising rate of the inner drum; and lengthen the length of time the heating component is connected to the bus when the temperature is lower than a second temperature threshold, thereby accelerating the temperature rising rate of the inner drum.

[0014] According to another aspect of the embodiments of the present application, a control method of a washing machine drive control circuit is also 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 an inner drum of a 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 stabilizing controller in the washing machine drive control circuit, so as to make a voltage difference between the bus voltage and the reference voltage less than a voltage difference threshold.

[0015] Optionally, the control method of the washing machine drive control circuit further comprises: obtaining a current temperature of the inner drum; determining a duty cycle of a bleeding circuit switch tube in the washing machine drive control circuit according to a temperature difference between the current temperature and a temperature threshold; and determining a length of time a heating component in the washing machine drive control circuit is connected to a 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 the embodiments of the present application, a control device of a washing machine drive control circuit is also provided, which is applied to any one of the washing machine drive control circuits described above, and comprises: a first obtaining module configured to obtain a bus voltage and an input voltage of the washing machine drive control circuit during rotation of an inner drum of a washing machine; a setting module configured to set a reference voltage of the washing machine drive control circuit according to the input voltage; and an adjusting module configured to adjust the bus voltage by a bus voltage stabilizing controller in the washing machine drive control circuit, so as to make a voltage difference between the bus voltage and the reference voltage less than a voltage difference threshold.

[0017] Optionally, the control device of the washing machine drive control circuit further comprises: a second acquisition module configured to acquire a current temperature of the inner drum; a first determination module configured to determine a duty cycle of a bleeding circuit switch tube in the washing machine drive control circuit according to a temperature difference between the current temperature and a temperature threshold; and a second determination module configured to determine a time length of a heating component connected to a bus in the washing machine drive control circuit 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 application, there is also provided a washing machine using the control method of the washing machine drive control circuit according to any one of the above.

[0019] According to another aspect of the embodiments of the present application, there is also provided a computer readable storage medium comprising a stored program, wherein the program performs the control method of the washing machine drive control circuit according to any one of the above.

[0020] According to another aspect of the embodiments of the present application, there is also provided a processor configured to run a program, wherein the program performs the control method of the washing machine drive control circuit according to any one of the above.

[0021] According to another aspect of the embodiments of the present application, there is also provided a computer program product comprising computer instructions configured to perform the control method of the washing machine drive control circuit according to any one of the above.

[0022] In the embodiments of the present application, during rotation of an inner drum of a washing machine, a bus voltage and an input voltage of a washing machine drive control circuit are acquired; a reference voltage of the washing machine drive control circuit is set according to the input voltage; and a bus voltage stabilizer in the washing machine drive control circuit is used to adjust the bus voltage, so that a voltage difference between the bus voltage and the reference voltage is less than a voltage difference threshold. Through the technical solution provided by the present application, a bus voltage stabilizer is set to maintain dynamic balance between the bus voltage and a bleeding circuit, to avoid bus voltage pumping during speed reduction braking of the washing machine and to maintain stability of the bus voltage, thereby achieving technical effects of dynamic balance and energy regeneration, improving energy saving performance and safety of the washing machine, and further solving the technical problem in the related art that braking and stopping of the washing machine can cause the bus voltage to be too high, thereby threatening safety of devices in the drive control circuit. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0024] Figure 1 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 drive control circuit according to an embodiment of the present application;

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

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

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

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

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

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

[0032] Figure 9 is a schematic diagram of a control device of a washing machine drive control circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0034] It should be noted that the terms "first", "second", and the like in the description and claims of the application and the above drawings are used to distinguish between similar objects and are not necessarily used to describe a particular sequential or chronological order. It should be understood that the use of such terms is arbitrary and the embodiments of the application described herein can operate in orders other than those illustrated or described herein. Furthermore, the terms "comprising", "having", and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or apparatus that comprises a list of steps or units not necessarily limited to those explicitly listed, but can include other steps or units not expressly listed or inherent to such process, method, product, or apparatus.

[0035] As introduced in the background, the related art laundry machine braking stop can cause the bus voltage to be too high, which threatens the safety of the driving control circuit device. In the embodiments of the application, a laundry machine driving control circuit and a control method and device thereof, a laundry machine, a computer readable storage medium, a processor and a computer program product are provided.

[0036] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application.

[0037] According to an aspect of the embodiments of the application, a laundry machine driving control circuit is provided, Figure 2 is a schematic diagram of the laundry machine driving control circuit according to the embodiments of the application, as Figure 2 shown, the laundry machine driving control circuit can include a rectifier module 201, a capacitor 203, a frequency converter 205, a motor 207 and a bus voltage stabilizing controller 209. The laundry machine driving control circuit will be described in detail below.

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

[0039] It should be noted that the rectifier module, i.e. the rectifier bridge, is an electronic component used to convert alternating current into direct current. It can convert alternating current input into direct current, and is commonly used in power supplies, motor controllers and other circuits that require alternating current to be converted into direct current. It has the advantages of simple structure, low cost and high efficiency, and is suitable for various power and voltage applications.

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

[0041] It should be noted that the above filtering processing is a signal processing technology for removing noise or unwanted frequency components in the signal, so as to extract the required signal information.

[0042] Figure 3 is a schematic diagram of the driving control of the variable frequency washing machine with parallel heating pipes according to an embodiment of the present application, as Figure 3 The above-mentioned capacitor, i.e. the support capacitor, is a pulsating DC voltage output by the rectifier bridge. The support 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 voltage into adjustable AC voltage.

[0044] It should be noted that the frequency converter is an electronic device used to control the speed and current of the motor, which is used to control the speed and torque of the motor. The DC voltage is converted into adjustable AC voltage with adjustable frequency and voltage through the inverter circuit to realize accurate control of the motor.

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

[0046] The motor 207 is connected with the frequency converter and is used to control the rotation of the inner drum of the washing machine according to the adjustable AC voltage delivered by the frequency converter to process the clothes in the inner drum.

[0047] As Figure 3 shown, the motor is connected with the frequency converter and the inner drum of the washing machine. The washing machine motor is one of the core components of the washing machine, which is responsible for driving the rotation of the inner drum of the washing machine to complete washing and dehydration operations.

[0048] The bus voltage stabilizing controller 209 is connected with the capacitor and is used to adjust the bus voltage corresponding to the DC voltage after the filtering processing of the capacitor, so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold. 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 stabilizing controller adjusts the bus voltage according to the reference voltage and the DC voltage after the filtering of the capacitor, so as to keep the bus voltage stable within a predetermined range, which can ensure that the washing machine obtains stable voltage supply during operation, thereby improving the stability and performance of the equipment.

[0050] Specifically, the controller detects the difference between the bus voltage and the reference voltage continuously, and when the difference is greater than a set voltage difference threshold, the controller will take appropriate control strategy, for example, adjusting the voltage output of the capacitor, so that the bus voltage returns to the set range, which can effectively avoid the problem that the bus voltage fluctuates too much and affects the normal operation of the equipment.

[0051] As can be seen from the above, in the embodiment of the application, a rectifier module can be arranged in the washing machine drive control circuit to convert alternating current input to the washing machine into direct current, a capacitor is arranged in parallel with the rectifier module to filter the direct current output by the rectifier module and obtain filtered direct current, a frequency converter is arranged in parallel with the capacitor to invert the filtered direct current into adjustable alternating current, a motor is arranged to be connected to the frequency converter to control the rotation of the inner drum of the washing machine according to the adjustable alternating current delivered by the frequency converter to process the clothes in the inner drum, and a bus voltage stabilizing controller is arranged to be connected to the capacitor to adjust the bus voltage corresponding to the direct current filtered by the capacitor so that the voltage difference between the bus voltage and the 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, thereby achieving the technical effects of maintaining the dynamic balance between the bus voltage and the bleeder circuit and avoiding the purpose of pump-up of the bus voltage during the speed reduction braking process and maintaining the stability of the bus voltage of the washing machine, thereby realizing the technical effects of dynamic balance and energy regeneration and improving the energy saving performance and safety of the washing machine.

[0052] The above technical solution provided by the embodiment of the application solves the technical problem that the brake stop of the washing machine in the related art causes the bus voltage to be too high, thereby threatening the safety of the drive control circuit device.

[0053] According to the above embodiment of the application, 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 conduction and cutoff 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 alternating current into direct current for driving the motor or other electronic components, and through the conduction and cutoff states of the plurality of first diodes, the negative half cycle of the alternating current can be converted into a positive half cycle, thereby realizing the control and stabilization of the current and ensuring that the motor or other components of the washing machine can obtain stable direct current power supply, thereby realizing normal work.

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

[0056] As shown in Figure 3 , in the rectifier bridge, the four diodes are connected in a bridge structure, two of which are connected in the positive half-cycle current path, and the other two are connected in the negative half-cycle current path. When alternating current is input into the rectifier bridge, it will make the diodes therein turn on alternately, so that the direction of the output current is always positive, thereby realizing the function of converting alternating current into direct current.

[0057] According to the above embodiment of the present application, the frequency converter includes a plurality of second diodes, each of which is connected in parallel with a switch tube, and the plurality of second diodes connected in parallel with the switch tubes are connected with three-phase voltages of the motor, respectively, to provide adjustable alternating current for the motor.

[0058] In this embodiment, the frequency converter can control the speed of the motor, and the speed of the motor can be changed by adjusting the frequency and voltage of the alternating current to meet different washing needs of the washing machine. When the washing machine is working, the functions of starting, accelerating, decelerating and stopping of the motor can be realized by controlling the switch tubes and the second diodes in the frequency converter, so as to realize the normal operation and efficient washing of the washing machine.

[0059] As shown in Figure 3 , the frequency converter controls the conduction and cutoff of the plurality of diodes (i.e., second diodes) by using the switch tubes, so as 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, so as to control the output voltage and frequency of the motor.

[0060] According to the above embodiment of the present application, the washing machine driving control circuit further comprises a heating component connected in parallel with the capacitor, which is used to convert the regenerated 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 connected in parallel with the capacitor can convert the regenerated energy generated by the inner drum in the stop braking state into heat to heat the inner drum, which can help the washing machine to maintain the temperature of the inner drum in the stop state, avoid the clothes from becoming cold during the stop period, and also save energy and improve the efficiency of the washing machine.

[0062] It should be noted that in the experiment, it is known that hot water can improve the activity of the detergent, make the oil stains on the clothes more easily stripped and removed, and also make the clothes more fluffy and soft, so that the washing effect of the washing machine inner drum under the condition of heating and warming up is better.

[0063] According to the above embodiment of the present application, the washing machine drive control circuit further comprises: a bleeder circuit switch tube connected with the heating component and the bus voltage stabilizing controller, used for dynamically adjusting the access and cut-off time of the bleeder circuit, so that the voltage difference between the bus voltage and the reference voltage is less than the voltage difference threshold, wherein the bleeder circuit comprises the bleeder circuit switch tube and the heating component.

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

[0065] In this embodiment, the bleeder circuit switch tube can dynamically adjust the access and cut-off time of the bleeder circuit to ensure that the bus voltage is stable around the reference voltage, by controlling the working state of the bleeder circuit, the load of the circuit can be effectively adjusted, so that the washing machine can stably run during work, improve its performance and efficiency, in addition, the heating power of the heating component can also be adjusted by the control circuit to meet different washing needs.

[0066] As shown in Figure 3 The bleeder circuit switch tube is connected with the heating component and the bus voltage stabilizing controller, the regenerative energy generated by the brake shutdown can be applied to the heating tube to heat the washing water, avoiding the bus voltage pump from rising too high, and the hot water can improve the activity of the detergent, make the oil stains on the clothes more easily stripped and removed, and also make the clothes more fluffy and soft.

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

[0068] In this embodiment, the bus voltage stabilizing controller can ensure that the washing machine motor can work normally under stable voltage, avoid the motor from working unstably or being damaged due to voltage fluctuation, control the current and speed of the motor by monitoring the bus voltage and adjusting the duty cycle of the bleeder circuit switch tube according to the reference voltage, so as to ensure the normal operation of the washing machine, improve the performance and stability of the washing machine, and prolong 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 application, as Figure 4 shown, the stable bus voltage control circuit has 2 inputs (reference voltage and bus voltage) and 1 output (bleeder circuit switch tube duty cycle), the bus voltage stability controller dynamically adjusts the time of the bleeder circuit access and cut-off through the output bleeder circuit switch tube duty cycle to maintain the bus voltage stable at the reference voltage.

[0070] It should be noted that the above bus voltage stability controller is to maintain the dynamic balance between the bus voltage and the bleeder circuit by dynamically adjusting the time of the bleeder circuit access and cut-off through the output bleeder circuit switch tube duty cycle, thereby maintaining the bus voltage stable at the reference voltage.

[0071] According to the above embodiment of the present application, the duty cycle is positively correlated with the time of the heating component accessing the bus and the falling speed of the bus voltage.

[0072] In this embodiment, the positive correlation between the duty cycle and the time of the heating component accessing the bus and the falling speed of the bus voltage can be used to control the heating function of the washing machine. By adjusting the duty cycle and the time of the heating component accessing the bus, the working time and power of the heating component can be controlled, thereby realizing accurate control of the heating function of the washing machine. At the same time, monitoring the falling speed of the bus voltage can be used to judge the power consumption of the heating component, to ensure the normal operation of the washing machine and avoid overload, and to improve the heating efficiency and safety of the washing machine.

[0073] Figure 5 is a schematic diagram of a bus voltage stability controller based on a PI controller according to an embodiment of the present application, as Figure 5 shown, the bus voltage stability controller can be a PI controller (Proportional-Integral Controller), which subtracts the reference voltage Uref from the bus voltage Udc to obtain an error voltage Uerror. If the error voltage Uerror is positive, it means that the bus voltage is too small, and the switch tube duty cycle D can be appropriately reduced to reduce the time of the heating tube accessing the bus, so that the bus voltage Udc rises to the reference voltage Uref. If the error voltage Uerror is negative, it means that the bus voltage is too large, and the switch tube duty cycle D can be appropriately increased to extend the time of the heating tube accessing the bus, so that the bus voltage Udc falls to the reference voltage Uref. The PI controller dynamically adjusts the time of the bleeder circuit access and cut-off through the output bleeder circuit switch tube duty cycle to maintain the bus voltage stable at the reference voltage, and the parameters Kp and Ki can be adjusted to a more reasonable value in experiments.

[0074] It should be noted that the reference voltage Uref can be set slightly higher than the input voltage Uin*1.414, and a suitable pump-up voltage space is reserved in the safe voltage range when the washing machine is decelerated and braked, for example, the reference voltage Uref is the input voltage Uin*1.414*1.2; the 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 large, the heating tube is connected to the bus for a long time, and the bus voltage drops quickly. If the duty cycle is small, the heating tube is connected to the bus for a short time, and the bus voltage drops slowly. Therefore, the duty cycle D can be controlled to dynamically adjust the connection and removal time of the heating tube, thereby maintaining the stability of the bus voltage.

[0076] In addition, it should be noted that the above-mentioned PI controller is a commonly used controller type for controlling the process in the system, which includes a proportional controller (P controller) and an integral controller (I controller). 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 quickly respond 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-mentioned embodiment of the present application, the washing machine drive control circuit further comprises a temperature sensor arranged in the inner drum for obtaining the temperature of the inner drum, wherein the temperature is used for adjusting the reference voltage, so as to shorten the time length of the heating component connected to the bus when the temperature is higher than the first temperature threshold, to delay the temperature rising rate of the inner drum; and when the temperature is lower than the second temperature threshold, the time length of the heating component connected to the bus is extended, to accelerate the temperature rising 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 inner drum temperature. By monitoring the inner drum temperature in real time, the duration of the heating element's connection 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 inner drum temperature is higher than the first temperature threshold, the duration of the heating element's connection to the busbar is shortened to slow down the temperature rise rate of the inner drum and protect it from overheating. When the inner drum temperature is lower than the second temperature threshold, the duration of the heating element's connection to the busbar is extended to accelerate the temperature rise rate of the inner drum, improve the washing machine's working efficiency, and protect the inner drum while regulating the temperature.

[0080] As can be seen from the above, in this embodiment of the invention, by setting a stable bus voltage controller, the dynamic balance between the bus voltage and the discharge circuit is maintained, avoiding the bus voltage surge during the deceleration braking process of the washing machine and maintaining the bus voltage stability. At the same time, a heating tube is connected in parallel at the bus support capacitor to convert the regenerative energy generated during braking and stopping into heat in the inner drum, improving the washing effect. The entire control process can keep the bus voltage within a safe range, avoiding excessive bus voltage during braking and stopping, which could endanger the safety of the devices. It also maintains the bus voltage at the reference voltage value, suppresses repeated fluctuations in the bus voltage and frequent charging and discharging of the support capacitor, suppresses the heating of the support capacitor, and extends the service life of the support capacitor. On the other hand, the recycling of regenerative energy plays a green and environmentally friendly role and can also improve the washing effect of the washing machine.

[0081] The methods and embodiments provided in this invention can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 6 This is a hardware structure block diagram of a mobile terminal for a control method of a washing machine drive control circuit according to an embodiment of the present invention. Figure 6 As shown, a mobile terminal may include one or more ( Figure 6 Only one is shown in the diagram. A processor 602 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 604 for storing data are also shown. The mobile terminal may further include a transmission device 606 for communication functions and an input / output device 608. Those skilled in the art will understand that... Figure 6 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 6 The more or fewer components shown, or having the same Figure 6 The different configurations shown.

[0082] The memory 604 can be used to store computer programs, such as software programs of application software and modules, such as a computer program corresponding to the control method of the washing machine drive control circuit in the embodiments of the present application. The processor 602 can execute various function applications and data processing, i.e., implement the above method, by running the computer program stored in the memory 604. The memory 604 can include a high-speed random access memory, and can further include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 604 can further include a memory remotely arranged with respect to the processor 602, which can be connected to the mobile terminal through a network. Examples of the above 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 specific examples of the above network can include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 606 includes a network adapter (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 can be a radio frequency (RF) module, which is used to communicate with the Internet in a wireless manner.

[0083] According to the embodiments of the present application, a method embodiment of the control method of the 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 the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0084] Figure 7 is a flowchart of the control method of the washing machine drive control circuit according to the embodiments of the present application, as shown in Figure 7 The method includes the following steps:

[0085] In step S702, during rotation of the inner tub of the washing machine, the bus voltage and the input voltage of the washing machine drive control circuit are obtained.

[0086] In this embodiment, by obtaining the bus voltage and the 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, so as to ensure that the rotation speed and direction of the inner tub 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, and the safety and stability of the washing machine can be ensured.

[0087] Step S704, setting the reference voltage of the washing machine drive 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 works normally under different voltages, guarantee that the washing machine runs stably under different voltages, and can avoid damaging 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 functions of the washing machine. By setting the reference voltage according to the input voltage, 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, adjusting the bus voltage through the bus voltage stabilizing 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.

[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, and its service life can be prolonged. The bus voltage can be stabilized within a suitable range to ensure the normal operation of the washing machine.

[0091] Figure 8 is the flow chart of the optional control method of the washing machine drive control circuit according to the embodiment of the present application, as shown in Figure 8 After the inner drum of the washing machine starts to rotate, 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 through the bus voltage stabilizing controller, and the time of the discharge circuit switch tube duty cycle is dynamically adjusted to keep the bus voltage stable at the reference voltage.

[0092] As known from the above, in the embodiment of the present application, 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 through the bus voltage stabilizing 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. By setting the bus voltage stabilizing controller, the dynamic balance between the bus voltage and the discharge circuit is maintained, the bus voltage is prevented from being pumped up during the speed reduction braking process of the washing machine, and the bus voltage is kept stable. At the same time, a heating pipe is connected in parallel at the bus support capacitor, and the regenerated energy generated during braking shutdown is converted into heat in the inner drum through the heating pipe, thereby achieving the technical effects of dynamic balance and energy regeneration, and improving the energy saving performance and safety of the washing machine.

[0093] By means of the technical scheme provided by the embodiment of the present application, the technical problem that the brake stop of the washing machine causes the bus voltage to be excessively high, thereby threatening the safety of the driving control circuit device in the related art is solved.

[0094] According to the above embodiment of the present application, the control method of the washing machine driving control circuit further comprises: acquiring the current temperature of the inner drum; determining the duty cycle of the bleeding circuit switch tube in the washing machine driving control circuit according to the temperature difference between the current temperature and the temperature threshold; and determining the time length for which the heating component in the washing machine driving 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.

[0095] As shown in Figure 8 After the washing machine starts rotating the inner drum, the temperature T (i.e., the current temperature) of the inner drum is also detected, the duty cycle of the bleeding circuit switch tube is determined according to the temperature difference between the current temperature and the temperature threshold, and the reference voltage is set.

[0096] In this embodiment, the working time length of the heating component can be automatically adjusted according to the current temperature of the inner drum, so as to keep the temperature of the inner drum within a set predetermined temperature range. By monitoring the temperature of the inner drum in real time and adjusting the duty cycle of the bleeding circuit switch tube according to the temperature difference, the working time length of the heating component can be effectively controlled, thereby realizing 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 excessively high, the clothes, such as wool and viscose woven fabrics, may be damaged, and the color fastness thereof may be poor when the temperature is excessively high.

[0098] Specifically, in order to keep the temperature of the inner drum within a suitable temperature range, a temperature sensor is arranged in the inner drum. When the temperature of the inner drum is high, the reference voltage Uref can be appropriately increased within the safe voltage range, for example, the reference voltage Uref can be the input voltage Uin*1.414*1.3, the duty cycle D of the bleeding circuit switch tube can be reduced, the time length for which the heating pipe is connected to the bus can be reduced, and the temperature rise of the inner drum can be slowed down. When the temperature of the inner drum is low, the reference voltage Uref can be appropriately reduced, for example, the reference voltage Uref can be the input voltage Uin*1.414*1.1, the duty cycle D of the bleeding circuit switch tube can be increased, the time length for which the heating pipe is connected to the bus can be extended, and the temperature rise of the inner drum can be accelerated. The reference voltage Uref is adaptively adjusted according to the temperature T of the inner drum, which can avoid damage to the clothes caused by excessively high temperature of the inner drum and keep the clothes within a suitable temperature range to maintain good washing effect.

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

[0100] Wherein, the higher inner drum temperature can be set according to the upper limit of the washing program temperature range multiplied by 0.9, such as selecting mixed washing, the suitable temperature range is 40-60℃, the higher can be 60*0.9=54, the temperature greater than 54 degrees is higher.

[0101] Similarly, the lower inner drum temperature can be set according to the lower limit of the washing program temperature range multiplied by 1.1, such as selecting mixed washing, the suitable temperature range is 40-60℃, the lower can be 40*1.1=44, the temperature less than 44 degrees is lower.

[0102] The specific way of increasing the reference voltage and reducing the drain circuit switch duty cycle is as follows: normally, the reference voltage Uref is set to Uin*1.414*1.2; when the inner drum temperature is higher, the reference voltage Uref is set to Uin*1.414*1.3; when the inner drum temperature is lower, the reference voltage Uref is set to Uin*1.414*1.1; the greater the drain circuit switch duty cycle D is, the longer the heating tube is powered on, and the faster the inner drum is heated.

[0103] The reason for adjusting in the above manner is as follows: when the inner drum temperature is higher, the reference voltage Uref is also higher, and a relatively larger part of the regenerated energy generated by the brake stop can flow to the bus voltage, and the part flowing to the heating tube is correspondingly reduced, so that the inner drum temperature can be inhibited from being too high; when the inner drum temperature is lower, the reference voltage Uref is also lower, and a relatively smaller part of the regenerated energy generated by the brake stop flows to the bus voltage, and the part flowing to the heating tube is correspondingly increased, so that the inner drum can be heated faster.

[0104] In addition, it should be noted that, in order to ensure the safety of the support capacitor and the frequency converter switch tube, the bus voltage must be maintained within the safe voltage range, which is marked in the device specification book.

[0105] The technical scheme provided by the above embodiment of the application solves the problem of excessive bus voltage caused by brake stop of the washing machine, maintains the stability of the bus voltage, inhibits the aging of the support capacitor, recycles the regenerated energy, plays a green environmental protection role, and improves the washing effect of the washing machine. At the same time, the entire control process can keep the bus voltage within a safe range, avoid the danger of excessive bus voltage during brake stop, recycle the regenerated energy, play a green environmental protection role, and improve the washing effect of the washing machine.

[0106] That is, the above technical solution provided by the embodiment of the present application comprehensively considers various factors, controls the relationship between the bus voltage and the discharge circuit by setting the bus voltage controller, avoids the pump-up of the bus voltage of the washing machine during the speed reduction process and the maintenance of the stability of the bus voltage, suppresses the aging of the support capacitor, and on the other hand, the heating pipe is connected in parallel at the bus support capacitor, the regenerated energy generated by the braking stop is converted into heat in the inner drum through the heating pipe, and the cleaning effect is improved.

[0107] It should be noted that, for the foregoing method embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the action sequence described, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0108] From the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be realized by means of software and the necessary general hardware platform, and of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application 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 plurality of instructions for making a terminal device (which can be a mobile phone, computer, server, or network device, etc.) execute the method of each embodiment of the present application.

[0109] According to the embodiment of the present application, a control device for the washing machine driving control circuit is also provided, Figure 9 is a schematic diagram of the control device for the washing machine driving control circuit according to the embodiment of the present application, as Figure 9 shown, the device includes a first acquisition module 901, a setting module 903 and an adjusting module 905. The control of the washing machine driving control circuit will be described below.

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

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

[0112] The adjusting module 905 is configured to adjust the bus voltage by the bus voltage stabilizing controller in the washing machine driving 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 that the first acquisition module 901, the setting module 903 and the adjusting module 905 correspond to steps S702 to S706 in the above embodiment, and the three modules have the same instances and application scenarios as the corresponding steps, but are not limited to the contents disclosed in the above embodiment.

[0114] As can be seen from the above, in the scheme described in the above embodiment of the present application, first, the first acquisition module is used to acquire the bus voltage and the input voltage of the washing machine drive control circuit during the rotation of the inner drum of the washing machine; then the setting module is used to set the reference voltage of the washing machine drive control circuit according to the input voltage; finally, the adjusting module is used to adjust the bus voltage through the bus voltage stabilizing 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 technical effects of maintaining the dynamic balance between the bus voltage and the bleeder circuit by setting the bus voltage stabilizing controller, avoiding the bus voltage pump-up during the speed reduction braking process of the washing machine and maintaining the stability of the bus voltage, and converting the regenerated energy generated during the braking shutdown into heat in the inner drum through the heating pipe connected in parallel at the bus support capacitor, thereby achieving the technical effects of dynamic balance and energy regeneration, and improving the energy saving performance and safety of the washing machine.

[0115] Through the above technical scheme provided by the embodiment of the present application, the technical problem that the braking shutdown of the washing machine in the related art causes the bus voltage to be too high, thereby threatening the safety of the drive control circuit device, is solved.

[0116] In an optional embodiment, the control device of the washing machine drive control circuit further includes: a second acquisition module configured to acquire a current temperature of the inner drum; a first determination module configured to determine a duty cycle of a bleeder circuit switch tube in the washing machine drive control circuit according to a temperature difference between the current temperature and a temperature threshold; and a second determination module configured to determine a time length for which a heating component in the washing machine drive control circuit is connected to the bus, so as to maintain the temperature of the inner drum at a predetermined temperature.

[0117] According to another aspect of the embodiment of the present application, a washing machine is also provided, which uses the control method of the washing machine drive control circuit according to any one of the above.

[0118] According to another aspect of the embodiment of the present application, a processor is also provided, which is configured to run a program, wherein the program performs the control method of the washing machine drive control circuit according to any one of the above when the program is running.

[0119] According to another aspect of the embodiments of the present application, there is also provided a computer program product comprising computer instructions for executing the control method of the washing machine drive control circuit according to any one of the above.

[0120] According to another aspect of the embodiments of the present application, there is also provided a computer readable storage medium comprising a stored program for executing the control method of the washing machine drive control circuit according to any one of the above.

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

[0122] Optionally, in the embodiment, the computer readable storage medium is configured to store program code for performing the following steps: obtaining the bus voltage and the input voltage of the washing machine drive control circuit during rotation of the inner tub 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 by the bus voltage stabilizer 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 the embodiment, the computer readable storage medium is configured to store program code for performing the following steps: obtaining the current temperature of the inner tub; 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 time length for which the heating component in the washing machine drive control circuit is connected to the bus according to the duty cycle, so that the temperature of the inner tub is maintained at the predetermined temperature.

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

[0125] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0126] In several embodiments provided in the present application, it should be understood that the disclosed technical contents can be implemented by other ways. Among them, the above-described device embodiments are only schematic, for example, the division of the units can be a logical function division, and actual implementation can have another division way, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between units or modules, which can be electrical or other forms.

[0127] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0128] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

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

[0130] The above is only the preferred embodiment of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A drive control circuit for a washing machine, characterized by comprising: The application relates to a washing machine driving control circuit, which comprises the following parts: a rectifier module for converting AC power input into DC power; a capacitor connected in parallel with the rectifier module for filtering the DC power output by the rectifier module to obtain filtered DC power; a frequency converter connected in parallel with the capacitor for inverting the filtered DC power into adjustable AC power; a motor connected with the frequency converter for controlling the rotation of an inner drum of the washing machine according to the adjustable AC power transmitted by the frequency converter to process clothes in the inner drum; a bus voltage stabilizing controller connected with the capacitor for adjusting the bus voltage corresponding to the filtered DC power to make the voltage difference between the bus voltage and a reference voltage less than a voltage difference threshold, wherein the reference voltage is determined according to the input voltage of the washing machine; wherein the application further comprises a heating component connected in parallel with the capacitor for converting regenerative energy generated by the inner drum in a parking brake state into heat to heat the inner drum; a bleeder circuit switch tube connected with the heating component and the bus voltage stabilizing controller for dynamically adjusting the time of connecting and cutting off the bleeder circuit to make the voltage difference between the bus voltage and the reference voltage less than the voltage difference threshold, wherein the bleeder circuit comprises the bleeder circuit switch tube and the heating component.

2. The washing machine drive control circuit according to claim 1, characterized in that, The rectifier module comprises a plurality of first diodes, and the negative half cycle of the AC power is converted into a positive half cycle through the on and off states of the plurality of first diodes to convert the AC power into the DC power.

3. The washing machine drive control circuit of claim 1, wherein The frequency converter comprises a plurality of second diodes, and each of the plurality of second diodes is connected in parallel with a switch tube, wherein the plurality of second diodes connected in parallel with the switch tubes are connected with three-phase voltage of the motor to provide the adjustable AC power for the motor.

4. The washing machine drive control circuit of claim 1, wherein The input of the bus voltage stabilizing controller is the reference voltage and the bus voltage, and the output of the bus voltage stabilizing controller is the duty cycle of the bleeder circuit switch tube.

5. The washing machine drive control circuit of claim 4, wherein, The duty cycle is positively correlated with the time length of the heating component connected with the bus and the falling speed of the bus voltage.

6. The drive control circuit for a washing machine according to claim 4, wherein The application further comprises a temperature sensor arranged in the inner drum for obtaining the temperature of the inner drum, wherein the temperature is used for adjusting the reference voltage to shorten the time length of the heating component connected with the bus to delay the temperature rising speed of the inner drum when the temperature is higher than a first temperature threshold, and to lengthen the time length of the heating component connected with the bus to accelerate the temperature rising speed of the inner drum when the temperature is lower than a second temperature threshold. The application is applied to the washing machine driving control circuit in any one of claims 1 to 6, and comprises the following parts:

7. A control method of a drive control circuit of a washing machine, characterized by, obtaining the bus voltage and the input voltage of the washing machine driving control circuit during the rotation of the inner drum of the washing machine; setting the reference voltage of the washing machine driving control circuit according to the input voltage; ​ The bus voltage is adjusted by a bus voltage stabilizing 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.

8. The control method of the drive control circuit of the washing machine according to claim 7, characterized by, Further comprising: acquiring a current temperature of the inner drum; determining a duty cycle of a bleeding circuit switch tube in the washing machine drive control circuit according to a temperature difference between the current temperature and a temperature threshold; determining a time length for a heating component in the washing machine drive control circuit to access the bus according to the duty cycle, so that the temperature of the inner drum is maintained at a predetermined temperature.

9. A control device of a drive control circuit of a washing machine, characterized by The washing machine drive control circuit of any one of claims 1 to 6, comprising: a first acquisition module, configured to acquire a bus voltage and an input voltage of the washing machine drive control circuit during rotation of an inner drum of the washing machine; a setting module, configured to set a reference voltage of the washing machine drive control circuit according to the input voltage; an adjustment module, configured to adjust the bus voltage by a bus voltage stabilizing 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.

10. A laundry machine characterized by The washing machine uses the control method of the washing machine drive control circuit according to the washing machine drive control circuit of claim 7 or 8.

11. A computer readable storage medium, characterized in that, The computer readable storage medium comprises a stored program, wherein the program executes the control method of the washing machine drive control circuit according to claim 7 or 8.

12. A processor, comprising: The processor is configured to run a program, wherein the program executes the control method of the washing machine drive control circuit according to claim 7 or 8 when running.

13. A computer program product comprising computer instructions, characterized in that, The computer instructions are executed by the processor to execute the control method of the washing machine drive control circuit according to claim 7 or 8.

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