CN112019016B

CN112019016B - Operation control method, device, circuit, household appliance and computer storage medium

Info

Publication number: CN112019016B
Application number: CN201910472229.8A
Authority: CN
Inventors: 胡斌; 曾贤杰; 文先仕
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2021-09-24
Anticipated expiration: 2039-05-31
Also published as: CN112019016A

Abstract

The invention provides an operation control method, an operation control device, a circuit, household electrical appliance equipment and a computer storage medium, wherein the operation control method comprises the following steps: determining a change rate of a bus voltage in the drive control circuit according to the output power of the power supply signal and the running power consumption of the load, and determining a switching time point of an action signal state according to the change rate, wherein the action signal state comprises an output state and an output stopping state, the bus voltage is in an ascending trend in the output state, the switching tube stops switching, and the bus voltage is in a descending trend in the output stopping state. According to the technical scheme, the conduction power consumption of the PFC switch module in the driving control circuit is reduced, so that the energy efficiency of electric equipment such as an air conditioner and the like adopting the driving control circuit is improved.

Description

Operation control method, device, circuit, household appliance and computer storage medium

Technical Field

The present invention relates to the field of drive control, and in particular, to an operation control method, an operation control device, a drive control circuit, a home appliance, and a computer-readable storage medium.

Background

PFC (Power Factor Correction) technology is widely used in drive control circuits, and mainly has an effect of improving the Power consumption efficiency of electric devices (loads).

In the related art, a PWM (Pulse-Width Modulation) signal is usually adopted to drive a switching tube to be turned on or off, and the following defects exist in the application process:

the scheme for realizing PFC control through continuous PWM output has a very low power factor at low load, and as the load decreases, the proportion of the total power occupied by the conduction loss increases, which ultimately results in low operating efficiency.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, it is an object of the invention to propose an operation control method.

Another object of the present invention is to provide an operation control device.

It is a further object of the present invention to provide a drive control circuit.

It is yet another object of the present invention to provide a home appliance.

It is yet another object of the present invention to provide a computer-readable storage medium.

In the technical solution of the first aspect of the present invention, the method is applied to a driving control circuit, the driving control circuit is configured to control a power supply signal to supply power to a load, and the driving control circuit further performs power factor correction by receiving a pulse width modulation signal, and the operation control method includes: determining a change rate of a bus voltage in the drive control circuit according to the output power of the power supply signal and the running power consumption of the load, and determining a switching time point of an action signal state according to the change rate, wherein the action signal state comprises an output state and an output stopping state, the bus voltage is in an ascending trend in the output state, the switching tube stops switching, and the bus voltage is in a descending trend in the output stopping state.

The operation control method according to the above embodiment of the present invention may further have the following additional technical features:

in the foregoing technical solution, optionally, the determining a change rate of a bus voltage in the drive control circuit according to the output power of the power supply signal and the operating power consumption of the load to determine a switching time point of an action signal state according to the change rate specifically includes: detecting the running power consumption according to a preset detection period; determining the change rate of the bus voltage in the current detection period according to the running power consumption; and determining the switching time point of the action signal state according to the change rate and a preset voltage limiting threshold value.

In the operation control method suitable for the drive control circuit, in the process of driving the load to operate by the drive control circuit, the operation power consumption of the load is collected, the change rate of the bus voltage is calculated according to the collected load power consumption and the output power of the power supply signal at the input side, so that the control strategy of the action signal is determined based on the change rate of the bus voltage, when the change trend of the bus voltage is detected to meet the state switching condition of the action signal, the switching time point is determined, the state switching operation is carried out, the bus voltage is in the rising trend in the state of outputting the action signal (specifically, a pulse width modulation signal, namely a PWM signal) to the switching tube, the bus voltage is in the falling trend in the state of stopping outputting the action signal to the switching tube, and the adaptation between the control side of the action signal and the control auxiliary power supply is realized, therefore, when the power supply to the loads with different power consumptions is controlled, the time length of the output state and/or the output stopping state of the action signal is adjusted, so that the loss of a switching device is reduced when the power supply to the loads with low power consumptions is controlled, the operating efficiency of the driving control circuit is improved, and the energy efficiency of electric equipment such as an air conditioner and the like adopting the driving control circuit is improved.

Further, based on a preset detection period, the state switching time point of the pwm signal is usually completed in the current detection period, and when the voltage variation satisfies a preset condition, the switching operation is performed to obtain a regular and definite output state switching time point, so as to implement burst (intermittent oscillation) mode control based on the detection period and the load power consumption, and by entering the burst mode, the on-state power consumption of the PFC switch module in the driving control circuit is reduced, so as to improve the energy efficiency of the electrical equipment such as an air conditioner and the like using the driving control circuit.

Specifically, the bus voltage may be regarded as a supply voltage to the load, the supply signal may be an ac supply signal of a commercial power, or may be a dc supply signal rectified by a rectifier, the detection period is preset to collect the operation power consumption of the load based on the detection period, and the change rate of the bus voltage of the bus capacitor is calculated, so that after the current detection period is completed, whether to switch the output state of the PWM signal is determined by estimating the voltage change of the next detection period, and after the output state is determined to be switched, the corresponding switching time point is determined, that is, if switching is performed, the switching time point of the output state is determined after the current detection period is completed, so as to complete the switching operation, and control execution of the intermittent oscillation mode is realized by switching the output state of the PWM signal at the corresponding switching time point.

As will be understood by those skilled in the art, the burst mode, which may be referred to as an intermittent oscillation mode, a controllable pulse mode or a skip cycle control mode, enables the output pulses of the PWM to be periodically enabled (i.e., the PWM is in an output state) or disabled (i.e., the PWM is in an output-disabled state) in the burst mode, thereby increasing the duty ratio to improve the operating efficiency of the load by reducing the number of switching times at a constant frequency.

In addition, as can also be understood by those skilled in the art, the collected operation power consumptions of different loads are different, but no matter any type of load, when the driving control circuit in the present application is used as the driving control circuit, since all the power is converted into other driving power (such as mechanical power), as a simpler collection way, the current of the load is used as the operation power consumption to calculate the change rate of the bus voltage in the current detection period, and thus more real-time feedback can be obtained.

In the foregoing technical solution, optionally, the change rate includes an increasing rate and a decreasing rate, and the determining the change rate of the bus voltage in the current detection period according to the operating power consumption specifically includes: and if the action signal is in an output state, determining the rising rate of the bus voltage according to the input power of the power supply signal and the running power consumption.

In this technical scheme, be provided with energy storage inductance and bus capacitor in the active PFC circuit, bus voltage is the voltage at bus capacitor both ends, when PWM signal is in output state, can also further divide into two kinds of mode: the switching between the two working modes is realized by the switching action of a switch tube in a PFC switch module, when a PWM signal is in an output state, the voltage of a bus is in an increasing trend, when the PWM signal is in a stop output state, the power supply signal and the load are equivalently in a cut-off state, the load is supplied with power through the bus capacitor, and the voltage of the bus is in a decreasing trend due to the discharge of the bus capacitor.

Specifically, the driving control circuit comprises a power factor correction module, for the active driving control circuit, the power factor correction module comprises a bridge rectifier, a first output end of the bridge rectifier is sequentially connected in series with an energy storage inductor, a current limiting diode and a bus capacitor, a cathode of the current limiting diode is connected to one end of the bus capacitor, a common connection point between the energy storage inductor and the current limiting diode is connected to a first end of a switching tube, and a second end of the switching tube and the other end of the bus capacitor are both connected to a second output end of the bridge rectifier.

Based on the above description, whether to perform the state switching operation is further determined in conjunction with the current operating state of the PWM signal, since the bus voltage is in the rising state on the whole trend when the PWM signal output is in the on state, the rising rate of the bus voltage is calculated according to the running power consumption.

In any of the foregoing technical solutions, optionally, the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold specifically includes: determining the voltage rising amount in each detection period according to the rising rate from the output starting time of the action signal; after at least one detection period, determining the voltage accumulated rising amount of the bus voltage in the current output state according to the voltage rising amount; if the accumulated voltage rise is greater than or equal to a preset voltage limiting threshold, controlling to stop outputting the action signal; and if the accumulated voltage rise is smaller than the preset voltage limiting threshold, continuing to output the action signal.

However, as can be understood by those skilled in the art, the previous voltage rise is an accumulated voltage rise before the current detection period is performed when the pwm signal is continuously in the output state, and if the current detection period is the first detection period after switching to the pwm signal output state, the previous voltage rise is an initialized voltage rise, and the initialized voltage rise may be normally set to 0.

In any of the above technical solutions, optionally, the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold specifically further includes: if the accumulated voltage rise is smaller than the preset voltage limiting threshold, predicting the predicted voltage rise in the next detection period according to a first prediction gain coefficient; and if the sum of the accumulated voltage rise and the estimated voltage rise is greater than or equal to the preset voltage limiting threshold, controlling to stop outputting the action signal.

In any of the above technical solutions, optionally, the first prediction gain coefficient is greater than or equal to 1 and less than or equal to 2.

In any of the above technical solutions, optionally, the method further includes: and if the sum of the accumulated voltage rise and the estimated voltage rise is smaller than the preset voltage limiting threshold, continuing to acquire the input power and the running power consumption in the next detection period, and updating the value of the real-time bus voltage according to the input power and the running power consumption.

In the technical scheme, the rising amount of the bus voltage of the next detection period is predicted through the rising rate, namely the predicted voltage rising amount, whether the working state of the PWM signal is switched to stop output or not is determined based on the predicted voltage rising amount and the current voltage rising amount, specifically, whether the switching condition of the PWM output signal is met or not is determined by detecting whether the accumulated rising amount reaches a preset voltage limiting threshold or not, namely, whether the PWM signal output is stopped or not is determined based on the predicted voltage rising amount, whether the current operation requirement of the load can be met or not through pure power supply of a bus capacitor is determined, and when the operation requirement is met, the output of the PWM signal is controlled to be stopped, namely, a control signal is not input into a switching tube, so that the purpose of reducing the switching times is achieved.

Specifically, the initial value of the bus voltage is initialized, i.e., the previous voltage rise U is detected before entering the first detection period₁₀Detecting the running power consumption of the load and calculating the rising rate V of the bus voltage₁And determining the rising amount DeltaU of the bus voltage₁＝U₁₀+V₁T, wherein T is the detection period of the load, when the rising amount delta U of the bus voltage₁Greater than or equal to the upper limit value DeltaU of the bus voltage variation_max(i.e., the preset voltage limiting threshold), the output of the PWM is turned off. When the rising amount Delta U of the bus voltage₁(i.e., the actual cumulative voltage rise) is smaller than the upper limit value DeltaU of the bus voltage change_maxThen according to the rising rate V₁Predicting the rise of the bus voltage in the next load detection period, i.e. predicting the voltage rise DeltaU_pre1＝k₁*V₁T, wherein k₁For the first prediction gain factor, a range of [1, 2 ] is selected]Thereby obtaining the estimated cumulative voltage rise delta U_p1＝△U₁+U_pre1When Δ U_p1Greater than or equal to the upper limit value DeltaU of the bus voltage variation_maxWhen the PWM is in the normal state, the output of the PWM is controlled to be closed so as to realize the switching of the output state of the PWM, and when the output state is delta U_p1Less than DeltaU_maxThen, according to the detection result of the next detection period, the updated delta U is determined in sequence₁(i.e., the cumulative amount of actual voltage) and Δ U_p1(prediction of cumulative voltage rise) and Δ U_maxAnd determining whether to perform output state switching.

In any one of the above technical solutions, optionally, determining a change rate of the bus voltage in a current detection period according to the operating power consumption, specifically, the method further includes: and if the action signal is in a stop output state, determining the reduction rate of the bus voltage in the current detection period according to the running power consumption.

In this technical solution, when the PWM signal output is in the output stop state, since the bus capacitor is receiving power to supply power to the load, the bus voltage is in a drop state, and therefore, the drop rate of the bus voltage needs to be calculated according to the operating power consumption.

In any of the above technical solutions, optionally, the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold specifically further includes: determining the voltage drop amount of each detection period according to the drop rate and the corresponding detection period from the output closing moment of the action signal, so as to determine the voltage accumulated drop amount of the bus voltage in the current output stop state according to the voltage drop amount of each detection period after at least one detection period; and if the accumulated voltage drop is greater than or equal to a preset voltage limiting threshold, controlling to start and output the action signal.

Here, as can be understood by those skilled in the art, the previous voltage drop amount is an accumulated voltage drop amount before the current detection period is performed when the pulse width modulation signal is continuously in the stop output state, and if the current detection period is the first detection period after switching to the pulse width modulation signal stop output state, the previous voltage drop amount is an initialized voltage drop amount, and the initialized voltage drop amount may be normally set to 0.

In any of the above technical solutions, optionally, the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold specifically further includes: if the voltage accumulated decline is smaller than the preset voltage limiting threshold, predicting the estimated voltage decline in the next detection period according to a second prediction gain coefficient; and if the sum of the accumulated voltage drop amount and the estimated voltage drop amount is greater than or equal to the preset voltage limiting threshold, controlling to start and output the action signal.

In any of the above technical solutions, optionally, the second prediction gain coefficient is greater than or equal to 1 and less than or equal to 2.

In any of the above technical solutions, optionally, the method further includes: and if the sum of the accumulated voltage drop amount and the estimated voltage drop amount is smaller than the preset voltage limiting threshold, continuing to acquire the running power consumption in the next detection period, and updating the value of the real-time bus voltage according to the running power consumption.

In the technical scheme, when the PWM is in the output stopping state, the current voltage drop amount obtained through calculation based on the currently collected operation power consumption is used, the voltage drop amount of the next period is estimated based on the current voltage drop amount, the accumulated voltage drop amount is obtained through accumulation, the time length for maintaining the load to operate through bus capacitor discharge is judged by combining with the preset voltage limiting threshold value, so that when the accumulated voltage drop amount is judged to be larger than or equal to the preset voltage limiting threshold value, the fact that the normal operation of the load can not be met through capacitor discharge is indicated, at the moment, the working state of the PWM is switched to the output state, the load is supplied with power through the power supply signal again, and the normal operation of the load is ensured while the switching times of the PFC switch module are reduced when the PWM is in the output stopping state.

Specifically, the initial value of the bus voltage is initialized, that is, the previous voltage drop amount Δ U is performed before the first detection period is entered₂₀Detecting the running power consumption of the load and calculating the dropping rate V of the bus voltage₂And determining the drop quantity delta U of the bus voltage₂＝U₂₀+V₂T, wherein T is the detection period of the power consumption of load operation, and when the voltage of the bus decreases by an amount delta U₂Greater than or equal to the upper limit value DeltaU of the bus voltage variation_max(i.e., the preset voltage limiting threshold), the PWM output is turned on. When the drop quantity delta U of the bus voltage₂(i.e., the actual cumulative voltage drop) is smaller than the upper limit value DeltaU of the bus voltage variation_maxThen, the voltage drop of the bus voltage in the next load detection period is predicted, namely the predicted voltage drop U_pre2＝k₂*V₂T, wherein the second coefficient k2 is a prediction gain coefficient for voltage reduction, selected in the range of [1, 2 ]]Thereby obtaining the estimated accumulated voltage drop quantity delta U_p2＝△U₂+U_pre2When Δ U_p2Greater than or equal to the upper limit value DeltaU of the bus voltage variation_maxAt first, openPWM output, current Δ U_p2Less than DeltaU_maxThen, according to the detection result of the next detection period, the updated delta U is determined in sequence₁(i.e., the cumulative amount of actual voltage) and Δ U_p2(prediction of cumulative voltage rise) and Δ U_maxAnd determining whether to perform output state switching.

In any one of the above technical solutions, optionally, the load is a compressor, and the acquiring of the operating power consumption of the load according to a preset detection period specifically includes: collecting line voltage and line current of the compressor according to the detection period; and determining the operation power consumption in each detection period according to the line voltage and the line current.

In this solution, the detection of the compressor line current is performed by providing a current sensor to determine the operating power consumption of the load based on the detected current value, thereby determining the rate of change of the bus voltage based on the operating power consumption.

In any of the above technical solutions, optionally, the power supply signal is an ac power supply signal, and the detection period is an integer multiple of a half-wave period of the ac power supply signal, so as to perform the switching operation at a zero-crossing point of the ac power supply signal.

In the technical scheme, a detection period is set corresponding to a signal period of an alternating current power supply signal, for example, a half-period length of the alternating current power supply signal is determined as a period length of one detection period, so that after one detection period is completed, a switching operation of a PWM output is determined to be executed according to a prediction result of a voltage variation, and when the switching operation is required, the switching operation is performed at a zero-crossing point of the alternating current power supply signal, so as to realize a burst mode optimized switching mode.

In any of the above technical solutions, optionally, the switch tube includes an IGBT-type power tube and a MOSFET, and the MOSFET includes a SiC-MOSFET and a GaN-MOSFET.

In the technical solution of the second aspect of the present invention, an operation control device is provided, where the operation control device may specifically include a processor and a current sensor, the current sensor collects a current of the load, and applies the current as an operation power consumption to a calculation of a change rate of a bus voltage, and when the processor executes a computer program, the operation control method according to any one of the above embodiments can be implemented, so that the operation control device has the beneficial technical effects of any one of the above operation control methods, and details thereof are not repeated here.

In an aspect of the third aspect of the present invention, a drive control circuit is provided, where the drive control circuit is configured to supply a load with a power supply signal input from a power grid system, and the drive control circuit is connected to any one of the operation control devices, and the drive control circuit includes: the power factor correction module comprises a switching tube; the driving module is electrically connected with the power factor correction module and used for outputting a pulse width modulation signal to the switching tube so as to enable the power factor correction module to execute power factor correction operation; the operation control device according to the second aspect of the present application is electrically connected to the driving module and the load, respectively, and the operation control device is configured to: determining a change rate of a bus voltage in the drive control circuit according to the output power of the power supply signal and the running power consumption of the load, and determining a switching time point of an action signal state according to the change rate, wherein the action signal state comprises an output state and an output stopping state, the bus voltage is in an ascending trend in the output state, the switching tube stops switching, and the bus voltage is in a descending trend in the output stopping state.

The driving control circuit provided by the invention comprises the operation control device, a driving module and a power factor correction module, wherein the operation control device can be specifically a processor, the processor controls the driving module to output a pulse width modulation signal to a switching tube in the power factor correction module, in the process of driving a load to operate by the driving control circuit, the operation power consumption of the load is collected based on a detection period to detect the power consumption of the load, the load is judged to be a high-power-consumption load or a low-power-consumption load based on the power consumption, specifically, the change rate of the corresponding bus voltage can be obtained by calculating the operation power consumption, the change amount of the bus voltage in the next detection period is predicted by the change rate, so that the power consumption of the load (including the high-power-consumption load or the low-power-consumption load) is based on the change amount, and the control strategy of the pulse width modulation signal is determined based on the power consumption type, the method comprises the steps of determining whether to stop outputting when a pulse width modulation signal (namely a PWM signal) is in an output mode, determining whether to start signal outputting when the PWM signal is in an output stop state so as to realize burst mode control based on a detection period and load power consumption, and reducing conduction power consumption of a PFC switch module in a driving control circuit by entering a burst mode so as to improve energy efficiency of electric equipment such as an air conditioner and the like adopting the driving control circuit.

In the foregoing technical solution, optionally, the driving control circuit further includes: the bus capacitor is arranged at the output end of the power factor correction module; the power factor correction module includes: the energy storage inductor is connected in series between the power supply source and the bus capacitor, the power supply source is used for generating the power supply signal, if the pulse width modulation signal is in an output state, the energy storage inductor, the bus capacitor and the load are powered through the power supply signal, or the energy storage inductor is charged through the power supply signal, the load is powered through the bus capacitor, and if the pulse width modulation signal is in a stop output state, the load is powered through the bus capacitor.

A fourth aspect of the present invention provides a home appliance comprising: a load; the drive control circuit of any preceding claim, interposed between a grid system and a load, the drive control circuit configured to control the grid system to supply power to the load.

In this technical solution, the home appliance includes the driving control circuit described in any one of the above technical solutions, so that the home appliance includes all the beneficial effects of the driving control circuit described in any one of the above technical solutions, and details are not repeated again.

In the above technical solution, the household electrical appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer host.

A fifth aspect of the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed, carries out the steps of the operation control method as claimed in any one of the preceding claims.

In this technical solution, a computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the operation control method in any one of the above technical solutions, so that the computer-readable storage medium includes all beneficial effects of the operation control method in any one of the above technical solutions, and is not described again.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a flow diagram of an operational control method according to an embodiment of the invention;

FIG. 2 shows a flow diagram of an operational control method according to another embodiment of the present invention;

FIG. 3 shows a flow diagram of an operation control method according to yet another embodiment of the present invention;

fig. 4 shows a schematic block diagram of an operation control apparatus according to yet another embodiment of the present invention;

FIG. 5 shows a schematic diagram of a drive control circuit according to an embodiment of the invention;

FIG. 6 shows a schematic diagram of the drive control circuit of FIG. 5 in a first output mode;

FIG. 7 shows a schematic diagram of the drive control circuit of FIG. 5 in a second output mode;

fig. 8 shows a schematic diagram of the drive control circuit in fig. 5 not in the output mode.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

Example one

As shown in fig. 1, an operation control method according to an embodiment of the present invention is applied to a driving control circuit, the driving control circuit includes a power factor correction module, the power factor correction module includes a switching tube, so as to control a power supply signal to supply power to a load by outputting a pulse width modulation signal to the switching tube, and the operation control method includes:

step 102, determining a change rate of a bus voltage in the drive control circuit according to the output power of the power supply signal and the running power consumption of the load, and determining a switching time point of an action signal state according to the change rate, wherein the action signal state comprises an output state and an output stopping state, the bus voltage is in an ascending trend in the output state, the switching tube stops switching, and the bus voltage is in a descending trend in the output stopping state.

In the foregoing embodiment, optionally, the determining a change rate of a bus voltage in the drive control circuit according to the output power of the power supply signal and the operating power consumption of the load to determine a switching time point of an action signal state according to the change rate specifically includes: detecting the running power consumption according to a preset detection period; determining the change rate of the bus voltage in the current detection period according to the running power consumption; and determining the switching time point of the action signal state according to the change rate and a preset voltage limiting threshold value.

In the above embodiment, optionally, the change rate includes an increasing rate and a decreasing rate, and the determining the change rate of the bus voltage in the current detection period according to the operating power consumption specifically includes: and if the action signal is in an output state, determining the rising rate of the bus voltage according to the input power of the power supply signal and the running power consumption.

In this embodiment, the active PFC circuit is provided with an energy storage inductor and a bus capacitor, and the bus voltage, that is, the voltage at two ends of the bus capacitor, when the PWM signal is in the output state, may further be divided into two operating modes: the switching between the two working modes is realized by the switching action of a switch tube in a PFC switch module, when a PWM signal is in an output state, the voltage of a bus is in an increasing trend, when the PWM signal is in a stop output state, the power supply signal and the load are equivalently in a cut-off state, the load is supplied with power through the bus capacitor, and the voltage of the bus is in a decreasing trend due to the discharge of the bus capacitor.

In any of the above embodiments, optionally, the determining a switching time point of the motion signal state according to the change rate and a preset voltage limiting threshold specifically includes: determining the voltage rising amount in each detection period according to the rising rate from the output starting time of the action signal; after at least one detection period, determining the voltage accumulated rising amount of the bus voltage in the current output state according to the voltage rising amount; if the accumulated voltage rise is greater than or equal to a preset voltage limiting threshold, controlling to stop outputting the action signal; and if the accumulated voltage rise is smaller than the preset voltage limiting threshold, continuing to output the action signal.

In any of the above embodiments, optionally, the determining a switching time point of the motion signal state according to the change rate and a preset voltage limiting threshold specifically further includes: if the accumulated voltage rise is smaller than the preset voltage limiting threshold, predicting the predicted voltage rise in the next detection period according to a first prediction gain coefficient; and if the sum of the accumulated voltage rise and the estimated voltage rise is greater than or equal to the preset voltage limiting threshold, controlling to stop outputting the action signal.

In any of the above embodiments, optionally, the first prediction gain factor is greater than or equal to 1 and less than or equal to 2.

In any of the above embodiments, optionally, the method further includes: and if the sum of the accumulated voltage rise and the estimated voltage rise is smaller than the preset voltage limiting threshold, continuing to acquire the input power and the running power consumption in the next detection period, and updating the value of the real-time bus voltage according to the input power and the running power consumption.

In this embodiment, the rising amount of the bus voltage in the next detection period is predicted by the rising rate, that is, the predicted voltage rising amount, so as to determine whether to switch the operating state of the PWM signal to the stop output based on the predicted voltage rising amount and the current voltage rising amount, specifically, whether to meet the switching condition of the PWM output signal is determined by detecting whether the accumulated rising amount reaches a preset voltage limiting threshold, that is, whether to meet the current operation requirement of the load if the PWM signal output is stopped is determined based on the predicted voltage rising amount, so as to control the stop of the output of the PWM signal when the operation requirement is met, that is, the control signal is not input to the switching tube, so as to achieve the purpose of reducing the switching times.

Specifically, the initial value of the bus voltage is initialized, i.e., the previous voltage rise U is detected before entering the first detection period₁₀Detecting the movement of the load at 0 ═ 0Line power consumption, calculating the rising rate V of the bus voltage₁And determining the rising amount DeltaU of the bus voltage₁＝U₁₀+V₁T, wherein T is the detection period of the load, when the rising amount delta U of the bus voltage₁Greater than or equal to the upper limit value DeltaU of the bus voltage variation_max(i.e., the preset voltage limiting threshold), the output of the PWM is turned off. When the rising amount Delta U of the bus voltage₁(i.e., the actual cumulative voltage rise) is smaller than the upper limit value DeltaU of the bus voltage change_maxThen according to the rising rate V₁Predicting the rise of the bus voltage in the next load detection period, i.e. predicting the voltage rise DeltaU_pre1＝k₁*V₁T, wherein k₁For the first prediction gain factor, a range of [1, 2 ] is selected]Thereby obtaining the estimated cumulative voltage rise delta U_p1＝△U₁+U_pre1When Δ U_p1Greater than or equal to the upper limit value DeltaU of the bus voltage variation_maxWhen the PWM is in the normal state, the output of the PWM is controlled to be closed so as to realize the switching of the output state of the PWM, and when the output state is delta U_p1Less than DeltaU_maxThen, according to the detection result of the next detection period, the updated delta U is determined in sequence₁(i.e., the cumulative amount of actual voltage) and Δ U_p1(prediction of cumulative voltage rise) and Δ U_maxAnd determining whether to perform output state switching.

In any of the foregoing embodiments, optionally, determining a change rate of the bus voltage in the current detection period according to the operating power consumption, specifically, the method further includes: and if the action signal is in a stop output state, determining the reduction rate of the bus voltage in the current detection period according to the running power consumption.

In this embodiment, since the bus voltage is in a falling state since it is the bus capacitor that discharges power to supply power to the load when the PWM signal output is in the stop output state, it is necessary to calculate the falling rate of the bus voltage according to the operating power consumption.

In any of the above embodiments, optionally, the determining a switching time point of the motion signal state according to the change rate and a preset voltage limiting threshold specifically further includes: determining the voltage drop amount of each detection period according to the drop rate and the corresponding detection period from the output closing moment of the action signal, so as to determine the voltage accumulated drop amount of the bus voltage in the current output stop state according to the voltage drop amount of each detection period after at least one detection period; and if the accumulated voltage drop is greater than or equal to a preset voltage limiting threshold, controlling to start and output the action signal.

In any of the above embodiments, optionally, the determining a switching time point of the motion signal state according to the change rate and a preset voltage limiting threshold specifically further includes: if the voltage accumulated decline is smaller than the preset voltage limiting threshold, predicting the estimated voltage decline in the next detection period according to a second prediction gain coefficient; and if the sum of the accumulated voltage drop amount and the estimated voltage drop amount is greater than or equal to the preset voltage limiting threshold, controlling to start and output the action signal.

In any of the above embodiments, optionally, the second prediction gain factor is greater than or equal to 1 and less than or equal to 2.

In any of the above embodiments, optionally, the method further includes: and if the sum of the accumulated voltage drop amount and the estimated voltage drop amount is smaller than the preset voltage limiting threshold, continuing to acquire the running power consumption in the next detection period, and updating the value of the real-time bus voltage according to the running power consumption.

In the embodiment, when the PWM is in the output stop state, the current voltage drop amount obtained by calculation based on the currently collected operating power consumption is calculated, the voltage drop amount of the next period is estimated based on the current voltage drop amount, the accumulated voltage drop amount is obtained by accumulation, the time length for maintaining the load to operate through the bus capacitor discharge is determined by combining with the preset voltage limiting threshold, so that when the accumulated voltage drop amount is determined to be greater than or equal to the preset voltage limiting threshold, it is indicated that the normal operation of the load can not be satisfied any more through the capacitor discharge, at this time, the working state of the PWM is switched to the output state, and the load is supplied with power through the power supply signal again, so that the normal operation of the load is ensured while the PWM is in the output stop state to reduce the switching frequency of the PFC switch module.

Specifically, the initial value of the bus voltage is initialized, that is, the previous voltage drop amount Δ U is performed before the first detection period is entered₂₀Detecting the running power consumption of the load and calculating the dropping rate V of the bus voltage₂And determining the drop quantity delta U of the bus voltage₂＝U₂₀+V₂T, wherein T is the detection period of the power consumption of load operation, and when the voltage of the bus decreases by an amount delta U₂Greater than or equal to the upper limit value DeltaU of the bus voltage variation_max(i.e., the preset voltage limiting threshold), the PWM output is turned on. When the drop quantity delta U of the bus voltage₂(i.e., the actual cumulative voltage drop) is smaller than the upper limit value DeltaU of the bus voltage variation_maxThen, the voltage drop of the bus voltage in the next load detection period is predicted, namely the predicted voltage drop U_pre2＝k₂*V₂T, wherein the second coefficient k2 is a prediction gain coefficient for voltage reduction, selected in the range of [1, 2 ]]Thereby obtaining the estimated accumulated voltage drop quantity delta U_p2＝△U₂+U_pre2When Δ U_p2Greater than or equal to the upper limit value DeltaU of the bus voltage variation_maxWhen it is time, the PWM output is turned on, when Δ U_p2Less than DeltaU_maxThen, according to the detection result of the next detection period, the updated delta U is determined in sequence₁(i.e., the cumulative amount of actual voltage) and Δ U_p2(prediction of cumulative voltage rise) and Δ U_maxAnd determining whether to perform output state switching.

In any of the above embodiments, optionally, the load is a compressor, and the acquiring the operating power consumption of the load according to a preset detection period specifically includes: collecting line voltage and line current of the compressor according to the detection period; and determining the operation power consumption in each detection period according to the line voltage and the line current.

In this embodiment, the detection of the compressor line current is performed by providing a current sensor to determine the operating power consumption of the load based on the detected current value, thereby determining the rate of change of the bus voltage based on the operating power consumption.

In any of the above embodiments, optionally, the power supply signal is an ac power supply signal, and the detection period is an integer multiple of a half-wave period of the ac power supply signal, so as to perform the switching operation at a zero-crossing point of the ac power supply signal.

In this embodiment, the detection period is set corresponding to the signal period of the ac power supply signal, for example, the half-period length of the ac power supply signal is determined as the period length of one detection period, so that after the completion of one detection period, the switching operation of the PWM output needs to be performed is determined according to the prediction result of the voltage variation, and when the switching operation needs to be performed, the switching operation is performed at the zero-crossing point of the ac power supply signal, so as to implement the burst mode optimized switching manner.

In any of the above embodiments, optionally, the switch tube includes an IGBT-type power tube and a MOSFET, and the MOSFET includes a SiC-MOSFET and a GaN-MOSFET.

Example two

Fig. 2 shows a schematic flow chart of an operation control method of another embodiment of the present invention.

As shown in fig. 2, an operation control method according to another embodiment of the present invention includes:

and 202, acquiring the running power consumption of the load according to a preset running detection period.

In the foregoing embodiment, optionally, the determining, according to the operating power consumption, a change rate of a bus voltage in the drive control circuit in a current detection period specifically includes:

and 204, if the pulse width modulation signal is in an output state, determining the rising rate of the bus voltage according to the running power consumption.

As shown in fig. 2, in any of the above embodiments, optionally, the determining, by the operating power consumption according to the change rate and the duration of the detection period, a state switching time point of the pwm signal specifically includes:

step 206, calculating the current voltage rise in the current detection period according to the rise rate;

step 208, determining an actual accumulated voltage rise according to the current voltage rise and a previous voltage rise;

step 210, determining whether the actual accumulated voltage rise is greater than or equal to the preset voltage limiting threshold, if yes, entering step 218, and if no, entering step 212.

Wherein the previous voltage rise is a historical accumulated voltage rise when the pulse width modulation signal is in an output state.

In any of the above embodiments, optionally, the determining, by the operating power consumption according to the change rate and the duration of the detection period, a state switching time point of the pwm signal further includes:

step 212, if it is detected that the actual accumulated voltage rise is smaller than a preset voltage limiting threshold, predicting the estimated voltage rise in the next detection period according to a first prediction gain coefficient, wherein the first prediction gain coefficient is greater than or equal to 1 and less than or equal to 2;

step 214, calculating the sum of the current voltage rise and the estimated voltage rise, and determining the sum as the estimated accumulated voltage rise;

step 216, determining whether the estimated accumulated voltage rise is greater than or equal to the preset voltage limiting threshold, if yes, entering step 218, if no, returning to step 202, i.e., if the estimated accumulated voltage rise is less than the preset voltage limiting threshold, returning to collect the operation power consumption again according to the detection period, and updating the actual accumulated voltage rise or the estimated accumulated voltage rise according to the operation power consumption; if the actual accumulated voltage rise or the estimated accumulated voltage rise is greater than or equal to the preset voltage limiting threshold, controlling to stop outputting the pulse width modulation signal when the current detection period is ended;

step 218, controlling to stop outputting the pulse width modulation signal when the current detection period is ended.

Specifically, the initial value of the bus voltage is initialized, i.e., the previous voltage rise U is detected before entering the first detection period₁₀Detecting the running power consumption of the load and calculating the rising rate V of the bus voltage₁And determining the rising amount DeltaU of the bus voltage₁＝U₁₀+V₁T, wherein T is the detection period of the load, when the rising amount delta U of the bus voltage₁Greater than or equal to the upper limit value DeltaU of the bus voltage variation_max(i.e., the preset voltage limiting threshold), the output of the PWM is turned off. When the rising amount Delta U of the bus voltage₁(i.e., the actual cumulative voltage rise) is smaller than the upper limit value DeltaU of the bus voltage change_maxThen according to the rising rate V₁Predicting the rise of the bus voltage in the next load detection period, i.e. predicting the voltage rise DeltaU_pre1＝k₁*V₁T, wherein k₁For the first prediction gain factor, a range of [1, 2 ] is selected]Thereby obtaining the estimated cumulative voltage rise delta U_p1＝△U₁+U_pre1When Δ U_p1Greater than or equal to the upper limit value DeltaU of the bus voltage variation_maxWhen the PWM is in the normal state, the output of the PWM is controlled to be closed so as to realize the switching of the output state of the PWM, and when the output state is delta U_p1Less than DeltaU_maxThen according to the detection result of next detection period successively making sureDetermining updated DeltaU₁(i.e., the cumulative amount of actual voltage) and Δ U_p1(prediction of cumulative voltage rise) and Δ U_maxAnd determining whether to perform output state switching.

EXAMPLE III

Fig. 3 shows a schematic flow chart of an operation control method of still another embodiment of the present invention.

As shown in fig. 3, an operation control method according to still another embodiment of the present invention includes:

step 302, collecting the running power consumption of the load according to a preset detection period.

In any of the foregoing embodiments, optionally, the determining, according to the operating power consumption, a change rate of a bus voltage in the drive control circuit in a current detection period specifically includes:

and 304, if the pulse width modulation signal is in a stop output state, determining the reduction rate of the bus voltage according to the running power consumption.

As shown in fig. 3, in any of the above embodiments, optionally, the determining, by the operating power consumption according to the change rate and the duration of the detection period, a state switching time point of the pulse width modulation signal specifically includes:

step 306, calculating the current voltage drop amount in the current detection period according to the drop rate;

step 308, determining the actual accumulated voltage drop amount according to the current voltage drop amount and the previous voltage drop amount;

in step 310, it is determined whether the actual cumulative voltage drop is greater than or equal to the preset voltage limiting threshold, if yes, step 318 is performed, and if no, step 312 is performed.

Wherein the previous voltage drop amount is a historical accumulated voltage drop amount when the pulse width modulation signal is in a stop output state.

step 312, if it is detected that the actual accumulated voltage drop is smaller than the preset voltage limiting threshold, predicting the estimated voltage drop in the next detection period according to a second prediction gain coefficient, where the second prediction gain coefficient is greater than or equal to 1 and less than or equal to 2;

step 314, calculating the sum of the current voltage drop amount and the estimated voltage drop amount, and determining the sum as an estimated accumulated voltage drop amount;

step 316, determining whether the estimated cumulative voltage drop is greater than or equal to the preset voltage limiting threshold, if yes, entering step 318, if no, returning to step 302, i.e. if the estimated cumulative voltage drop is less than the preset voltage limiting threshold, returning to collect the operation power consumption again according to the detection period, and updating the actual cumulative voltage drop or the estimated cumulative voltage drop according to the operation power consumption; and if the actual accumulated voltage drop amount or the estimated accumulated voltage drop amount is larger than or equal to the preset voltage limiting threshold value, controlling to start and output the pulse width modulation signal when the current detection period is finished.

And step 318, controlling to start outputting the pulse width modulation signal when the current detection period is ended.

The method comprises the steps of predicting the rising amount of bus voltage of the next detection period through the rising rate, namely predicting the voltage rising amount, determining whether to switch the working state of a PWM signal to stop outputting or not based on the predicted voltage rising amount and the current voltage rising amount, specifically determining whether to meet the switching condition of the PWM output signal or not by detecting whether the accumulated rising amount reaches a preset voltage limiting threshold or not, namely determining whether to meet the operation requirement of the current load or not by simply supplying power through a bus capacitor if the PWM signal output is stopped based on the predicted voltage rising amount, and controlling the output of the PWM signal to be stopped when the operation requirement is met, namely not inputting a control signal to a switching tube, so as to achieve the purpose of reducing the switching times.

In any of the foregoing embodiments, optionally, the load is a compressor, the operation power consumption of the load is a three-line current of the compressor, a bus capacitor is disposed in the drive control circuit, and determining a change rate of a bus voltage in the drive control circuit in a current detection period according to the operation power consumption specifically includes: determining the running power consumption of the compressor according to the three-wire current; and determining the change rate according to the running power consumption, wherein if the pulse width modulation signal is in an output state, the load is powered through the power supply signal or the bus capacitor, the bus voltage is in an overall rising state, the change rate is a rising rate, if the pulse width modulation signal is in a stop output state, the load is powered through the bus capacitor, the bus voltage is in a falling state, and the change rate is a falling rate.

In any of the foregoing embodiments, optionally, the power supply signal is an ac power supply signal, and the detection period is set corresponding to a signal period of the power supply signal, so as to perform a switching operation of an output state of the pulse width modulation signal at a zero-crossing point of the ac power supply signal.

Example four

As shown in fig. 4, according to the operation control device 40 of an embodiment of the present invention, the operation control device may specifically include a processor 402 and a current sensor 404, the current sensor 404 collects the current of the load, and applies the current as the operation power consumption to the calculation of the change rate of the bus voltage, when the processor 402 executes a computer program, the operation control method according to any one of the above-mentioned embodiments can be implemented, so that the operation control device has the beneficial technical effects of any one of the above-mentioned operation control methods, and details are not repeated here.

EXAMPLE five

As shown in fig. 5, a drive control circuit according to an embodiment of the present invention is a drive control circuit, configured to supply a power supply signal input by a power grid system to a load, and the drive control circuit is connected to any one of the operation control devices, where the drive control circuit includes: a power factor correction module, namely a PFC module, comprising a switching tube (not shown in the figure); the driving module is electrically connected with the power factor correction module and used for outputting a pulse width modulation signal to the switching tube so as to enable the power factor correction module to execute power factor correction operation; the operation control device (i.e. 40 in fig. 4) according to the above embodiment is electrically connected to the driving module and the load, respectively, and is configured to: acquiring the running power consumption of the load according to a preset detection period; determining the change rate of the bus voltage in the drive control circuit in the current detection period according to the running power consumption; and determining the state switching time point of the pulse width modulation signal according to the change rate and the duration of the detection period by the running power consumption, wherein the state of the pulse width modulation signal comprises an output state and an output stopping state, and if the pulse width modulation signal enters the output stopping state, the switching tube stops switching.

The driving control circuit provided by the invention comprises the operation control device, a driving module and a power factor correction module, wherein the operation control device can be specifically a processor, the processor controls the driving module to output a pulse width modulation signal to a switching tube in the power factor correction module, in the process of driving a load to operate by the driving control circuit, the operation power consumption of the load is collected based on a detection period to detect the power consumption of the load, the load is judged to be a high-power-consumption load or a low-power-consumption load based on the power consumption, specifically, the change rate of the corresponding bus voltage can be obtained by calculating the operation power consumption, the change amount of the bus voltage in the next detection period is predicted by the change rate, so that the power consumption of the load (including the high-power-consumption load or the low-power-consumption load) is based on the change amount, and the control strategy of the pulse width modulation signal is determined based on, the method comprises the steps of determining whether to stop outputting when a pulse width modulation signal (namely a PWM signal) is in an output mode, determining whether to start signal outputting when the PWM signal is in an output stop state so as to realize burst mode control based on a detection period and load power consumption, and reducing conduction power consumption of a PFC switch module in a driving control circuit by entering a burst mode so as to improve energy efficiency of electric equipment such as an air conditioner and the like adopting the driving control circuit.

In particular, the bus voltage may be regarded as a supply voltage for a load, and the supply signal may be an AC supply signal AC of the utility power, or may be a dc supply signal rectified by a rectifier, through presetting a detection period, collecting the running power consumption of the load based on the detection period, and calculating the change rate of the bus voltage of the bus capacitor, so as to determine whether to switch the output state of the PWM signal by estimating the voltage variation of the next detection period after the current detection period is finished, and to determine the corresponding switching time point after determining to switch the output state, namely, if the switching is finished, the current detection period is the switching time point of the output state after the completion of the switching, so as to complete the switching operation, the control execution of the intermittent oscillation mode is realized by switching the output state of the PWM signal at the corresponding switching time point.

In the above embodiment, optionally, the drive control circuit further includes: and the bus capacitor C is arranged at the output end of the power factor correction module.

The power factor correction module as shown in the figure comprises: the energy storage inductor L is connected in series between the power supply source and the bus capacitor, the power supply source is used for generating the power supply signal, if the pulse width modulation signal is in an output state, the energy storage inductor, the bus capacitor C and the load are powered through the power supply signal, or the energy storage inductor is charged through the power supply signal, the load is powered through the bus capacitor C, and if the pulse width modulation signal is in a stop output state, the load is powered through the bus capacitor C.

In this embodiment, the active PFC circuit is provided with an energy storage inductor L and a bus capacitor C, and the bus voltage is the voltage across the bus capacitor C.

When the PWM signal is in the output state, the two operation modes can be further divided into: one mode is shown in fig. 6, power is supplied to the energy storage inductor L, the bus capacitor C and the load through a power supply signal, that is, the energy storage inductor L is in a discharge mode, the other mode is shown in fig. 7, the energy storage inductor L is charged through the power supply signal, and the load is supplied through the bus capacitor C, that is, an inductor charge mode, switching between the two working modes is realized through switching actions of a switching tube in the PFC switch module, when the PWM signal is in an output state, the bus voltage is wholly in an increasing trend, when the PWM signal is in a stop output state, as shown in fig. 8, the power supply signal and the load are equivalently in a cut-off state, the load is supplied with power through the bus capacitor C, and the bus voltage is in a decreasing trend due to discharge of the bus capacitor C.

EXAMPLE six

A home appliance according to an embodiment of the present invention includes: a load; the driving control circuit according to any one of the above embodiments, the driving control circuit is connected between a power grid system and a load, and the driving control circuit is configured to control the power grid system to supply power to the load.

In this embodiment, the home appliance includes the driving control circuit described in any of the above embodiments, so that the home appliance includes all the beneficial effects of the driving control circuit described in any of the above embodiments, and details are not repeated again.

In one embodiment of the present invention, optionally, the household appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer mainframe.

EXAMPLE seven

A computer-readable storage medium according to an embodiment of the invention, has stored thereon a computer program which, when executed, implements the steps of the operation control method as described in any one of the above.

In this embodiment, the computer-readable storage medium stores a computer program, and the computer program is executed by the processor to implement the operation control method in any of the above technical solutions, so that the computer-readable storage medium includes all the beneficial effects of the operation control method in any of the above technical solutions, and is not described again.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An operation control method for a driving control circuit, the driving control circuit comprising a power factor correction module, the power factor correction module comprising a switch tube for controlling a power supply signal to supply power to a load by outputting an action signal to the switch tube, the operation control method comprising:

determining a change rate of a bus voltage in the drive control circuit according to the output power of the power supply signal and the running power consumption of the load to determine a switching time point of an action signal state according to the change rate,

the action signal state comprises an output state and an output stopping state, the bus voltage is in an ascending trend in the output state, the switching tube stops switching action in the output stopping state, and the bus voltage is in a descending trend;

the determining, according to the output power of the power supply signal and the operating power consumption of the load, a change rate of a bus voltage in the drive control circuit to determine a switching time point of an action signal state according to the change rate specifically includes:

detecting the running power consumption according to a preset detection period;

determining the change rate of the bus voltage in the current detection period according to the output power of the power supply signal and the running power consumption;

and determining the switching time point of the action signal state according to the change rate and a preset voltage limiting threshold value.

2. The operation control method according to claim 1, wherein the change rate includes an increasing rate and a decreasing rate, and the determining the change rate of the bus voltage in the current detection period according to the operation power consumption specifically includes:

and if the action signal is in an output state, determining the rising rate of the bus voltage according to the input power of the power supply signal and the running power consumption.

3. The operation control method according to claim 2, wherein the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold specifically comprises:

determining the voltage rising amount in each detection period according to the rising rate from the output starting time of the action signal;

after at least one detection period, determining the voltage accumulated rising amount of the bus voltage in the current output state according to the voltage rising amount;

if the accumulated voltage rise is greater than or equal to a preset voltage limiting threshold, controlling to stop outputting the action signal;

and if the accumulated voltage rise is smaller than the preset voltage limiting threshold, continuing to output the action signal.

4. The operation control method according to claim 3, wherein the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold further comprises:

if the accumulated voltage rise is smaller than the preset voltage limiting threshold, predicting the predicted voltage rise in the next detection period according to a first prediction gain coefficient;

and if the sum of the accumulated voltage rise and the estimated voltage rise is greater than or equal to the preset voltage limiting threshold, controlling to stop outputting the action signal.

5. The operation control method according to claim 4,

the first prediction gain factor is greater than or equal to 1 and less than or equal to 2.

6. The operation control method according to claim 4, characterized by further comprising:

and if the sum of the accumulated voltage rise and the estimated voltage rise is smaller than the preset voltage limiting threshold, continuing to acquire the input power and the running power consumption in the next detection period, and updating the value of the real-time bus voltage according to the input power and the running power consumption.

7. The operation control method according to claim 2, wherein the rate of change of the bus voltage in a current detection period is determined according to the operation power consumption, and specifically, the method further comprises:

and if the action signal is in a stop output state, determining the reduction rate of the bus voltage in the current detection period according to the running power consumption.

8. The operation control method according to claim 7, wherein the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold further comprises:

determining the voltage drop amount of each detection period according to the drop rate and the corresponding detection period from the output closing moment of the action signal, so as to determine the voltage accumulated drop amount of the bus voltage in the current output stop state according to the voltage drop amount of each detection period after at least one detection period;

and if the accumulated voltage drop is greater than or equal to a preset voltage limiting threshold, controlling to start and output the action signal.

9. The operation control method according to claim 8, wherein the determining a switching time point of the action signal state according to the change rate and a preset voltage limiting threshold further comprises:

if the voltage accumulated decline is smaller than the preset voltage limiting threshold, predicting the estimated voltage decline in the next detection period according to a second prediction gain coefficient;

and if the sum of the accumulated voltage drop amount and the estimated voltage drop amount is greater than or equal to the preset voltage limiting threshold, controlling to start and output the action signal.

10. The operation control method according to claim 9,

the second prediction gain factor is greater than or equal to 1 and less than or equal to 2.

11. The operation control method according to claim 9, characterized by further comprising:

and if the sum of the accumulated voltage drop amount and the estimated voltage drop amount is smaller than the preset voltage limiting threshold, continuing to acquire the operation power consumption in the next detection period, and updating the value of the real-time bus voltage according to the operation power consumption.

12. The operation control method according to any one of claims 1 to 11, wherein the load is a compressor, and the collecting operation power consumption of the load according to a preset detection period specifically includes:

collecting line voltage and line current of the compressor according to the detection period;

and determining the operation power consumption in each detection period according to the line voltage and the line current.

13. The operation control method according to any one of claims 1 to 11,

the power supply signal is an alternating current power supply signal, and the detection period is an integral multiple of a half-wave period of the alternating current power supply signal, so that the switching operation is executed at a zero crossing point of the alternating current power supply signal.

14. The operation control method according to any one of claims 1 to 11,

the switch tube comprises an IGBT type power tube and a MOSFET, and the MOSFET comprises a SiC-MOSFET and a GaN-MOSFET.

15. An operation control device provided with a processor, characterized in that the processor, when executing a computer program, is capable of implementing an operation control method according to any one of claims 1 to 14.

16. A drive control circuit for controlling a supply of a supply signal to a load, comprising:

the power factor correction module comprises a switching tube;

the driving module is electrically connected with the power factor correction module and used for outputting an action signal to the switching tube so as to enable the power factor correction module to execute power factor correction operation;

the operation control device according to claim 15, electrically connected to the driving module and the load, respectively, the operation control device being configured to:

the action signal state comprises an output state and an output stopping state, the bus voltage is in an ascending trend in the output state, the switching tube stops switching action in the output stopping state, and the bus voltage is in a descending trend.

17. The drive control circuit according to claim 16, further comprising:

the bus capacitor is arranged at the output end of the power factor correction module;

the power factor correction module includes: an energy storage inductor connected in series between a power supply and the bus capacitor, the power supply being configured to generate the power supply signal,

if the action signal is in an output state, the energy storage inductor, the bus capacitor and the load are powered through the power supply signal, or the energy storage inductor is charged through the power supply signal, the load is powered through the bus capacitor, and if the action signal is in a stop output state, the load is powered through the bus capacitor.

18. An appliance, comprising:

a load;

the drive control circuit of claim 16 or 17, interposed between a supply signal and a load, the drive control circuit being configured to control the supply signal to supply power to the load.

19. The home device of claim 18,

the household appliance comprises at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector and a computer host.

20. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the operation control method according to any one of claims 1 to 14.