CN112019026B

CN112019026B - Operation control method, device, circuit, household appliance and computer storage medium

Info

Publication number: CN112019026B
Application number: CN201910472277.7A
Authority: CN
Inventors: 张杰楠; 黄招彬; 曾贤杰
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: 2022-04-29
Anticipated expiration: 2039-05-31
Also published as: CN112019026A

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: acquiring an operation parameter of the load, wherein the operation parameter corresponds to the size of the load; if the operating parameter is detected to be smaller than a parameter threshold value, controlling the switching device to be switched on and off according to a first control mode; and if the operating parameter is detected to be greater than or equal to the parameter threshold, controlling the switching device to be switched on and off according to a second control mode, wherein the first control mode is a multi-pulse control mode of the switching action signal, and the second control mode is an intermittent oscillation control mode of the switching action signal. By the technical scheme, the normal operation of the load can be met, the conduction power consumption of the switching device is reduced, the high-efficiency control operation can be realized for loads with different sizes, and the requirements of harmonic control can be met for different currents.

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) is usually adopted to drive a switching tube to be turned on or off, a common PFC module includes a Boost-type PFC module and a bridgeless totem-pole PFC module, and the two PFC modules have at least the following technical defects when driving a load:

(1) the circuit structure of the Boost type PFC module is simple, namely, the charging and discharging processes of the inductor are controlled through the switching tube, but the efficiency of the Boost type PFC module is low, and the switching loss is large.

(2) The efficiency of the bridgeless totem-pole type PFC module is higher than that of the Boost type PFC module, but the bridgeless totem-pole type PFC module usually works in a high-frequency mode which is only suitable for the condition of a large load, when the load is small, the conduction loss of a switching tube is increased, the efficiency is low, and therefore the hardware loss and the power consumption of a driving control circuit are high, and the energy efficiency of the load is not further improved.

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 an aspect of the first aspect of the present invention, an operation control method is provided, which is applied to a driving control circuit, where the driving control circuit includes a power factor correction module, the power factor correction module includes a switching device, and a power supply signal is controlled to supply power to a load by outputting a switching action signal to the switching device, and the operation control method includes: acquiring the operating parameters of the load; when the operation parameter is detected to be smaller than a parameter threshold value, controlling the switching device to be switched on and off according to a first control mode; and controlling the switching device to be switched on and off according to a second control mode when the operation parameter is detected to be greater than or equal to the parameter threshold, wherein the first control mode is a multi-pulse control mode of the switching action signal, and the second control mode is an intermittent oscillation control mode of the switching action signal.

In the technical scheme, for a load with low power consumption, if the load is powered by continuously outputting a switch action signal to a switch device, excessive power consumption waste is generally caused, in order to improve the control efficiency of the load, the conduction power consumption of the switch device is reduced, a first control mode and a second control mode are introduced to control the output of the switch action signal, the normal operation of the load can be met, the conduction power consumption of the switch device is reduced, the efficiency of power factor correction in a circuit can be improved, efficient control operation can be realized for loads with different sizes, and the requirements of harmonic control can be met by different currents.

The switching signal is specifically a Pulse Width Modulation (PWM) signal.

The multi-pulse control mode refers to that a switching device of a power factor correction module (namely a PFC module) is switched on and off for multiple times in a specific time end alternately so as to store energy for an inductor and release the energy for the inductor, thereby changing the waveform of input current, improving the input current harmonic wave and the power factor, and reducing the switching loss by reducing the switching times relatively to a continuous output switching action signal.

Specifically, for a totem-pole power factor correction module, in a multi-pulse control mode, in a half cycle of an alternating voltage, after a part of switching devices are started in a delayed mode and switched alternately for multiple times, the output is stopped for a period of time, and one of the part of switching devices outputs a high level and the other outputs a low level.

The intermittent oscillation control mode, namely the intermittent oscillation control mode, is to determine the output duration and the output stopping duration of the high-frequency working signal of the switching tube according to the dc bus voltage, wherein the output duration and the output stopping duration both maintain a plurality of half-wave durations of a plurality of ac power supply signals, and preferably perform switching operation of the output state at a zero crossing point of the ac power supply signal, so as to achieve reduced switching loss and improve the efficiency of power factor correction.

Specifically, in the output state, the whole half cycle is the alternate switching state, and in the output stop state, the output is stopped in the whole half cycle.

In addition, as the switching tube, an IGBT (Insulated Gate Bipolar Transistor) type power tube may be preferably used, or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) may be selected, and the MOSFET may specifically include a SiC-MOSFET and a GaN-MOSFET device.

The operating parameter includes at least one of load current, load power, compressor operating pressure, press frequency, etc.

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

in any of the above solutions, optionally, the plurality of switching devices are configured to form a bridge module, the switch tube of each bridge arm of the bridge type module is sequentially marked as a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, wherein a common end between the first switch tube and the second switch tube is connected with a first input line of the alternating current power supply signal, a common end between the third switching tube and the fourth switching tube is connected with a second input line of the alternating current power supply signal, and a high-voltage line of a bus signal is connected to a common end between the first switch tube and the fourth switch tube, the common end between the second switching tube and the third switching tube is connected with a low-voltage line of the bus signal, and a bus capacitor is connected between the high-voltage line and the low-voltage line, and the bus signal is an output signal of the power factor correction module.

In the technical solution, for the bridgeless totem-pole power factor correction module, since the bridgeless totem-pole power factor correction module has a plurality of switching devices, a control logic of the bridgeless totem-pole power factor correction module is more complex than that of a BOOST-FPC, and therefore, it is more necessary to improve the efficiency of power factor correction and reduce switching power consumption through a first control mode and a second control mode different from a continuous high-frequency output control mode in the prior art.

In the foregoing technical solution, optionally, the determining a control mode for the switching device according to the operation parameter specifically includes: if the operating parameter is detected to be smaller than a parameter threshold value, controlling the switching device to be switched on and off according to the first control mode; and if the operating parameter is detected to be greater than or equal to the parameter threshold value, controlling the switching device to be switched on and off according to the second control mode.

In the technical scheme, different parameter thresholds are set corresponding to different operation parameters, and the parameter thresholds are used for measuring the size of the current load, wherein, those skilled in the art can understand that the load is large, that is, the power consumption of the load is large, the load is small, that is, the power consumption of the load is small, the load larger than or equal to the parameter threshold is determined as the load with large power consumption, the load smaller than the parameter threshold is determined as the load with small power consumption, the switch device is controlled to be switched on and off by adopting a second control mode aiming at the load with large power consumption, that is, the switch device is controlled to be switched on and off by adopting an intermittent oscillation control mode, and the switch device is controlled to be switched on and off by adopting a first control mode aiming at the load with small power consumption, that is, so that the adaptation between the load and the control mode of the power factor correction module is realized, on one hand, the efficiency of power factor correction operation can be ensured, and on the other hand, the loss of the switching device is favorably reduced.

Optionally, the operating parameter includes at least one of load current, load power, compressor operating pressure, press frequency, and the like.

In the technical scheme, if the operation parameter is a load current, the parameter threshold is a load current threshold, if the operation parameter is a load power, the parameter threshold is a load power threshold, if the operation parameter is a compressor operation pressure, the parameter threshold is a preset pressure threshold, and if the operation parameter is a compression frequency, the parameter threshold is a preset frequency threshold.

It can be understood by those skilled in the art that the operation control method defined in the present application is applicable to both a totem-pole type power factor correction module and a BOOST type power factor correction module, and is preferably applied to a drive control circuit provided with the totem-pole type power factor correction module.

In any one of the above technical solutions, optionally, if it is detected that the operation parameter is smaller than an operation parameter threshold, controlling the plurality of switching devices to be turned on and off according to the first control mode specifically includes: when the operating parameter is detected to be smaller than an operating parameter threshold value, the third switching tube is controlled to be continuously turned off and the fourth switching tube is controlled to be continuously turned on within the positive half cycle of the alternating current power supply signal; and controlling the first switch tube and the second switch tube to alternately perform on-off operation according to a first preset time within the positive half cycle of the alternating current power supply signal.

In the technical scheme, for a multi-pulse control mode, in a positive half cycle of an alternating current power supply signal, controlling four switching tubes mainly comprises controlling a first switching tube and a second switching tube to be alternately switched on and switched off within a specified time period of the positive half cycle, and controlling a third switching tube and a fourth switching tube to be continuously switched off and on, so as to realize multi-pulse control on the switching tubes in the positive half cycle of the alternating current power supply signal.

In any one of the above technical solutions, optionally, if it is detected that the operation parameter is smaller than an operation parameter threshold, controlling the plurality of switching devices to be turned on and off according to the first control mode, specifically, the method further includes: in the negative half cycle of the alternating current power supply signal, controlling the third switching tube to be continuously conducted and controlling the fourth switching tube to be continuously turned off; and controlling the first switch tube and the second switch tube to alternately perform on-off operation according to a second preset time within the negative half cycle of the alternating current power supply signal.

In the technical scheme, for a multi-pulse control mode, in a negative half cycle of an alternating current power supply signal, controlling four switching tubes mainly comprises controlling a first switching tube and a second switching tube to be alternately switched on and off within a specified time period of the negative half cycle, controlling a third switching tube and a fourth switching tube to be continuously switched off and on to realize multi-pulse control on the switching tubes in a positive half cycle of the alternating current power supply signal, combining the multi-pulse control of the positive half cycle, realizing the on-off control of a switching device in a totem-pole power factor correction module in the multi-pulse control mode, and realizing optimization of a power supply control mode of a low-power-consumption load through adaptation between the multi-pulse control mode and the low-power-consumption load so as to achieve the purpose of improving energy efficiency.

In any of the foregoing technical solutions, optionally, if it is detected that the operating parameter is greater than or equal to the parameter threshold, controlling the plurality of switching devices to be turned on and off according to the second control mode specifically includes: if the operating parameter is detected to be greater than or equal to the parameter threshold value, acquiring the bus voltage of the load; determining a corresponding intermittent oscillation control strategy according to the relation between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold, so as to control whether to output the switching action signal to the switching device according to the intermittent oscillation control strategy, so that the bus voltage can be changed between the preset lower limit voltage threshold and the preset upper limit voltage threshold, wherein the preset upper limit voltage threshold is larger than the preset lower limit voltage threshold.

In the technical scheme, by respectively limiting a preset lower limit voltage threshold and a preset upper limit voltage threshold, to define a normal variation range of the bus voltage, as long as the bus voltage is within the normal variation range, the normal operation of the load can be ensured, a control strategy of a corresponding burst (intermittent oscillation) mode can be set aiming at the change of the bus voltage on the premise of ensuring the normal operation of the load, namely an intermittent oscillation control strategy, so as to control the switch action signal to be in an intermittent output state through the intermittent oscillation control strategy, namely, the switching action signal is not required to be continuously in an output state, namely, the switching device is not required to be continuously in a high-frequency action switching state, therefore, the conduction power consumption of the power factor correction module in the drive control circuit can be reduced, and the energy efficiency of electric equipment such as an air conditioner and the like adopting the drive control circuit is improved.

The switching action signal may be specifically a pulse width modulation signal (i.e., a PWM signal), and the bus voltage of the load may be obtained by setting a bus voltage detection module, or may be determined based on the operation parameter by collecting the operation parameter of the load.

In addition, the intermittent oscillation control strategy defined by the application is applicable to both boost (boost mode) power factor correction modules and totem-pole power factor correction modules.

The technical personnel in the field can understand that the bus voltage can be regarded as the supply voltage to the load, the supply signal can be the alternating current supply signal of the commercial power, and also can be the direct current supply signal rectified by the rectifier, the reliability of the drive control circuit for supplying power to the load is ensured through the limited preset lower limit voltage threshold value and the preset upper limit voltage threshold value, and the threshold interval formed by the lower limit voltage threshold value and the preset upper limit voltage threshold value, the conduction loss of the switching device is reduced through the intermittent oscillation control strategy formed based on the lower limit voltage threshold value and the preset upper limit voltage threshold value, and the execution efficiency of the power factor correction can be improved.

In the foregoing technical solution, optionally, the determining a corresponding intermittent oscillation control strategy according to a relationship between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold specifically includes: and if the switching action signal is in a stop output state and the bus voltage is detected to be reduced to be less than or equal to the preset lower limit voltage threshold, controlling to output the switching action signal to the switching device so as to control the bus voltage to rise to approach the upper limit voltage threshold.

In the technical scheme, an energy storage inductor and a bus capacitor are arranged in a drive control circuit, the bus voltage is the voltage at two ends of the bus capacitor, on the premise that a switch action signal is stopped to be output, at the moment, a power supply signal and a load are equivalently in a cut-off state, the load is supplied with power through the bus capacitor, the bus voltage is in a descending trend due to the discharge of the bus capacitor, if the bus voltage is detected to be reduced to be less than or equal to a preset lower limit voltage threshold value, the output of the switch action signal to a switch device is controlled to be started, so that the power supply signal supplies power to the load through the high-frequency action of the switch device, the bus voltage is in an ascending trend, on one hand, the power consumption of the switch device is reduced by controlling the switch action signal to be in a stop output state, on the other hand, the state switching operation of the switch action signal is executed when the bus voltage is detected to be reduced to be less than or equal to the preset lower limit voltage threshold value, the intermittent oscillation control strategy is formulated, so that the reliability of power supply to the load is ensured.

Specifically, the time period from the stop of the output of the switching action signal to the switching device to the restart of the output of the switching action signal, that is, the time period during which the switching device stops operating in one bus voltage change period.

The bus voltage can be changed between the preset lower limit voltage threshold and the preset upper limit voltage threshold, which can not completely ensure that the bus voltage is not smaller than the preset lower limit voltage threshold, and only when the bus voltage is detected to be close to the preset lower limit voltage threshold or smaller than the preset lower limit voltage threshold, the state of the change-over switch action signal can be started, that is, the switch action signal is started to be output to the switch device, so that the bus voltage is boosted, and the bus voltage is increased to be higher than the preset lower limit voltage threshold again.

In any one of the above technical solutions, optionally, the determining a corresponding intermittent oscillation control strategy according to a relationship between the bus voltage and a preset lower limit voltage threshold, and a preset upper limit voltage threshold specifically further includes: and if the switching action signal is in an output state and the bus voltage is detected to be increased to be greater than or equal to the preset upper limit voltage threshold, controlling to stop outputting the switching action signal to the switching device until the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold so as to finish a change cycle of the bus voltage.

In this technical solution, when the switching operation signal (i.e. the PWM signal) is in the output state, the operation mode can be further divided into two operation modes: one mode is to supply power to the energy storage inductor, the bus capacitor and the load through a power supply signal, namely the energy storage inductor is in a discharge mode, the other mode is to charge the energy storage inductor through the power supply signal, and the load is supplied power through the bus capacitor, namely an inductor charge mode, the two working modes are switched by high-frequency switching action of a switching device in the power factor correction module, when a PWM signal is in an output state, the bus voltage is wholly in a rising trend, therefore, in the rising process of the bus voltage, whether the bus voltage rises to be equal to or exceed a preset upper limit voltage threshold value needs to be detected, the switching action signal is controlled to be stopped to be output to the switching device, at the moment, the circuit is broken between the power supply signal and the load, the power is supplied to the load through the discharge of the bus capacitor, therefore, the bus voltage is in a falling state, on the one hand, the switching action signal is controlled to be stopped to be output to the switching device, the switching function of the switching action signal between output and output stop is realized, so that the formulation of an intermittent oscillation control strategy is realized, and on the other hand, the switching action signal is controlled to be stopped to be output on the basis of meeting the requirement of load power supply, so that the loss of a switching device is reduced.

The bus voltage can be changed between the preset lower limit voltage threshold and the preset upper limit voltage threshold, which can not completely ensure that the bus voltage does not exceed the preset upper limit voltage threshold, and only when the bus voltage is detected to be close to the preset upper limit voltage threshold or exceed the preset upper limit voltage threshold, the state of the change-over switch action signal can be started, that is, the output of the switch action signal to the switch device is stopped, so as to realize the voltage reduction of the bus voltage, and the bus voltage is reduced below the preset upper limit voltage threshold again.

Through the control process, the bus voltage is operated in the Burst mode of intermittent action within the threshold range between the preset upper limit voltage threshold and the preset lower limit voltage threshold.

Furthermore, a threshold value as close to the preset upper voltage threshold value or as close to the preset lower voltage threshold value as possible can be adoptedThe switching operation signal state is controlled to obtain the maximum bus voltage change range, namely

Thereby maximizing the efficiency improvement result of the burst mode and realizing the most efficient PFC function.

In any of the above technical solutions, optionally, the controlling to output the switching action signal to the switching device specifically includes: inputting reverse switching action signals to the first switching tube and the second switching tube respectively according to a preset period so as to control the first switching tube and the second switching tube to be alternately opened and closed at high frequency; if the alternating current power supply signal is in a positive half period, outputting a low level to the third switching tube, and outputting a high level to the fourth switching tube; and if the alternating current power supply signal is in a negative half period, outputting a high level to the third switching tube, and outputting a low level to the fourth switching tube, so that the third switching tube and the fourth switching tube are alternately opened and closed.

In the technical scheme, in the drive control circuit provided with the totem-pole type power factor correction module, different switch action signals are respectively output to the first switch tube and the second switch tube, and a high level and a low level are alternately output to the third switch tube and the fourth switch tube, so that the output of a high-frequency control switch action signal in the totem-pole type PFC module is realized, when the high-frequency control switch action signal is output to a switch device (specifically comprising the first switch tube and the second switch tube), the boost of the bus voltage is realized, when the output of the switch action signal is stopped, the buck of the bus voltage is realized, and the application of an intermittent output control strategy in the drive control circuit provided with the totem-pole type PFC module is further realized.

In any of the above technical solutions, optionally, the preset upper limit voltage threshold is determined according to a bus capacitor and a withstand voltage parameter of the switching device.

In any of the above technical solutions, optionally, the power supply signal is an ac power supply signal, and the preset lower limit voltage threshold is greater than a peak value of the ac power supply signal.

In the technical scheme, due to the boosting characteristic of the power factor correction module, the preset lower limit voltage threshold is set to be larger than the peak value of the alternating current power supply signal, so that the reliability of load power supply is ensured when the bus voltage is larger than or equal to the preset lower limit voltage threshold and smaller than or equal to the preset upper limit voltage threshold.

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 a load, so as to determine an operation parameter of the load according to the load current, and when the processor executes a computer program, the operation control method according to any one of the above descriptions can be implemented by the processor.

In an aspect of the third aspect of the present invention, a driving control circuit for controlling a load to be supplied with an ac power supply signal is provided, including: a power factor correction module comprising a switching device; the driving module is electrically connected with the power factor correction module and used for outputting a switching action signal to the switching device so as to enable the power factor correction module to execute power factor correction operation; the operation control device according to a second aspect of the present invention is electrically connected to the drive module and the load, respectively, and is configured to: acquiring an operation parameter of the load, wherein the operation parameter corresponds to the size of the load; and determining a control mode of the switching device according to the operation parameter, wherein the control mode comprises a first control module and a second control mode, the first control mode is a multi-pulse control mode of the switching action signal, and the second control mode is an intermittent oscillation control mode of the switching action signal.

The switching signal is specifically a Pulse Width Modulation (PWM) signal.

The multi-pulse control mode refers to that a switching device of a power factor correction module (namely a PFC module) is switched on and off for multiple times in a specific time end alternately so as to store energy for an inductor and release the energy for the inductor, thereby changing the waveform of input current, improving the input current harmonic wave and the power factor, and reducing the switching loss by reducing the switching times relatively to a continuous output switching action signal. In the above technical solution, optionally, the power supply signal is an ac power supply signal, the power factor correction module is an H-shaped rectification module, the switching device includes a first switching tube and a second switching tube connected in series, and a third switching tube and a fourth switching tube which are connected in series, wherein a common connecting point of the third switching tube and the fourth switching tube after being connected in series is connected with a live wire of the alternating current power supply signal, the common connection point of the first switch tube and the second switch tube after being connected in series is connected with the zero line of the alternating current power supply signal, the drain electrode of the first switch tube is connected with the drain electrode of the third switch tube in series, and a common connection point is determined as a first end of the bus voltage, a source electrode of the second switching tube is connected with a source electrode of the fourth switching tube in series, and defining the common connection point as a second terminal of the bus voltage and connecting a bus capacitance between the first terminal and the second terminal.

In the technical scheme, in the drive control circuit provided with the H-shaped rectifier module, different switch action signals are respectively output to the first switch tube and the second switch tube, and a high level and a low level are alternately output to the third switch tube and the fourth switch tube, so that the output of a high-frequency control switch action signal in the totem-pole PFC module is realized, when the high-frequency control switch action signal is output to a switch device (specifically comprising the first switch tube and the second switch tube), the boost of the bus voltage is realized, when the output of the switch action signal is stopped, the buck of the bus voltage is realized, and further, the application of an intermittent oscillation control strategy in the drive control circuit provided with the totem-pole PFC module is realized.

In the above technical solution, optionally, the power factor correction module includes 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 the switching device, and a second end of the switching device and the other end of the bus capacitor are both connected to a second output end of the bridge rectifier.

In the technical scheme, for a drive control circuit provided with a boost Power Factor Correction (PFC) module, when a switching action signal is in an output state, namely a third frequency switching action signal is output, a switching device is conducted in the process of charging an energy storage inductor, a rectified voltage signal charges the energy storage inductor, a diode is biased at the moment, power is supplied to a load through a bus capacitor, when the switching device is not conducted, the bus capacitor is charged through the reverse electromotive force characteristic of the energy storage inductor so that the bus voltage is increased, and when the switching action signal is in a stop output state, power is supplied to the load through the bus capacitor so that the bus voltage is reduced, so that the application of an intermittent oscillation control strategy in the drive control circuit provided with the boost PFC module is realized.

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 diagram of a drive control circuit according to an embodiment of the invention;

FIG. 5 shows a schematic diagram of the drive control circuit of FIG. 4 in a first output mode;

FIG. 6 shows a schematic diagram of the drive control circuit of FIG. 4 in a second output mode;

FIG. 7 shows a schematic diagram of the drive control circuit of FIG. 4 not in an output mode;

fig. 8 shows a schematic diagram of a drive control circuit provided with a totem-pole PFC module;

FIG. 9 is a graph showing control signals of the drive control circuit of FIG. 8 in a multi-pulse control mode;

fig. 10 is a diagram showing a power supply signal when the drive control circuit in fig. 8 outputs a PWM signal to the switching device;

FIG. 11 is a graph showing a control signal after the drive control circuit of FIG. 8 enters burst mode;

fig. 12 shows a schematic block diagram of an operation control apparatus according to still another embodiment of the present invention.

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 drive control circuit including a power factor correction module including a switching device to control a power supply signal to supply power to a load by outputting a switching action signal to the switching device, and includes:

102, acquiring the operating parameters of the load;

104, if the operating parameter is detected to be smaller than a parameter threshold value, controlling the switching device to be switched on and off according to a first control mode;

step 106, if the operation parameter is detected to be greater than or equal to the parameter threshold, controlling the switch device to be switched on and off according to a second control mode,

the first control mode is a multi-pulse control mode of the switching action signal, and the second control mode is an intermittent oscillation control mode of the switching action signal.

In this embodiment, for a load with low power consumption, if the load is still powered by continuously outputting a switching action signal to the switching device, excessive power consumption is generally wasted, in order to improve the control efficiency of the load and reduce the conduction power consumption of the switching device, the first control mode and the second control mode are introduced to control the output of the switching action signal, so that the normal operation of the load can be met, the conduction power consumption of the switching device is reduced, the efficiency of power factor correction in a circuit can be improved, efficient control operation can be realized for loads with different sizes, and the requirements of harmonic control can be met for different currents.

The switching signal is specifically a Pulse Width Modulation (PWM) signal.

In addition, as the switching tube, an IGBT (Insulated Gate Bipolar Transistor) type power tube may be preferably used, or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) may be selected, and the MOSFET specifically includes a SiC-MOSFET and a GaN-MOSFET device.

In the above embodiment, optionally, the determining a control mode for the switching device according to the operating parameter specifically includes: if the operating parameter is detected to be smaller than a parameter threshold value, controlling the switching device to be switched on and off according to the first control mode; and if the operating parameter is detected to be greater than or equal to the parameter threshold value, controlling the switching device to be switched on and off according to the second control mode.

In this embodiment, different parameter thresholds are set corresponding to different operation parameters, and the parameter thresholds are used for measuring the current load size, wherein, as can be understood by those skilled in the art, a load with a large load size, i.e. a load with a large power consumption and a load with a small load size, a load larger than or equal to the parameter threshold is determined as a load with a large power consumption, and a load smaller than the parameter threshold is determined as a load with a small power consumption, and for the load with a large power consumption, the switching device is controlled to be turned on and off by a second control mode, i.e. the switching device is controlled to be turned on and off by an intermittent oscillation control mode, and for the load with a small power consumption, the switching device is controlled to be turned on and off by a first control mode, i.e. a multi-pulse control mode is adopted, so that the adaptation between the load size and the control mode of the power factor correction module is realized, and on the one hand, the efficiency of power factor correction operation can be ensured, and on the other hand, the loss of the switching device is favorably reduced.

In this embodiment, if the operation parameter is the load current, the parameter threshold is the load current threshold, if the operation parameter is the load power, the parameter threshold is the load power threshold, if the operation parameter is the compressor operation pressure, the parameter threshold is the preset pressure threshold, and if the operation parameter is the compression frequency, the parameter threshold is the preset frequency threshold.

The following describes the multi-pulse control mode and the intermittent oscillation control mode in the present application by taking a bridgeless totem-pole power factor correction module as an example.

In any of the above embodiments, optionally, the plurality of switching devices are configured to form a bridge module, and the switching tubes of each bridge arm of the bridge module are sequentially denoted as a first switching tube, a second switching tube, a third switching tube and a fourth switching tube, where a common end between the first switching tube and the second switching tube is connected to the first input line of the ac power supply signal, a common end between the third switching tube and the fourth switching tube is connected to the second input line of the ac power supply signal, and a common end between the first switching tube and the fourth switching tube is connected to the high-voltage line of the bus signal, and a common end between the second switching tube and the third switching tube is connected to the low-voltage line of the bus signal, and a bus capacitor is connected between the high-voltage line and the low-voltage line.

In this embodiment, for the bridgeless totem-pole power factor correction module, since the bridgeless totem-pole power factor correction module has a plurality of switching devices, the control logic of the bridgeless totem-pole power factor correction module is more complex than that of the BOOST-FPC, and therefore, it is more necessary to improve the efficiency of power factor correction and reduce the switching power consumption through a first control mode and a second control mode different from the continuous high-frequency output control mode in the prior art.

Specifically, as shown in fig. 8, the power factor correction module is a bridgeless totem pole type power factor correction module and includes a plurality of switching devices, the plurality of switching devices includes a first switching tube Q1 and a second switching tube Q2 connected in series, and a third switching tube Q3 and a fourth switching tube Q4 connected in series, a common connection point of the third switching tube Q3 and the fourth switching tube Q4 connected in series is connected to a null line of the ac power supply signal, a common connection point of the first switching tube Q1 and the second switching tube Q2 connected in series is connected to a live line of the ac power supply signal, a drain of the first switching tube Q1 is connected in series to a drain of the third switching tube Q3 and determines a common connection point as a first end of the bus voltage, a source of the second switching tube Q2 is connected to a source of the fourth switching tube Q4 and determines a common connection point as a second end of the bus voltage, and a bus capacitor C is connected between the first end and the second end.

Example two

As shown in fig. 2, if it is detected that the operation parameter is smaller than a parameter threshold, controlling the switching devices to be turned on and off according to the first control mode, and if it is detected that the operation parameter is smaller than the operation parameter threshold, controlling the switching devices to be turned on and off according to the first control mode specifically includes: when the operating parameter is detected to be smaller than an operating parameter threshold value, the third switching tube is controlled to be continuously turned off and the fourth switching tube is controlled to be continuously turned on within the positive half cycle of the alternating current power supply signal; and controlling the first switching tube and the second switching tube to alternately perform on and off operations according to a first preset number of times in a positive half cycle of the alternating current power supply signal, specifically comprising:

step 202, detecting that the operating parameter is smaller than a parameter threshold value;

step 204, controlling the third switching tube to be continuously turned off and controlling the fourth switching tube to be continuously turned on within the positive half cycle of the alternating current power supply signal;

step 206, and passing a first time period from the starting zero crossing point of the positive half cycle;

step 208, controlling the first switch tube and the second switch tube to be alternately conducted for multiple times;

step 210, controlling the first switch tube to be switched on for a second time period and the second switch tube to be switched off for the second time period;

and 212, respectively controlling the first switching tube and the second switching tube to be turned off for a third time to complete the positive half cycle.

Step 214, controlling the third switching tube to be continuously conducted and controlling the fourth switching tube to be continuously turned off in the negative half cycle of the alternating current power supply signal;

step 216, and the first duration is elapsed from the zero-crossing of the beginning of the negative half cycle;

step 218, controlling the first switch tube and the second switch tube to be alternately conducted for multiple times;

step 220, controlling the second switch tube to be switched on for the second time period and the first switch tube to be switched off for the second time period;

step 222, the first switch tube and the second switch tube are respectively controlled to be turned off for a third time period, so as to complete the negative half cycle.

Fig. 9 shows control signals output to four switching tubes in the multi-pulse control mode.

As shown in figure 9 of the drawings,

AC power supply signal，

For the corresponding power supply current, in this embodiment, for the multi-pulse control mode, in the positive half cycle of the ac power supply signal, the controlling of the four switching tubes mainly includes, for the first switching tube Q1 and the second switching tube Q2, controlling the first switching tube Q1 and the second switching tube Q2 to be alternately opened and closed within a specified period of the positive half cycle, and controlling one of the third switching tube Q3 and the fourth switching tube Q4 to be continuously closed and the other to be continuously opened, so as to implement the multi-pulse control of the switching tubes in the positive half cycle of the ac power supply signal.

In this embodiment, for the multi-pulse control mode, in a negative half cycle of an ac power supply signal, if it is detected that the operating parameter is smaller than an operating parameter threshold, controlling the plurality of switching devices to be turned on and off according to the first control mode specifically includes: in the negative half cycle of the alternating current power supply signal, controlling the third switching tube to be continuously conducted and controlling the fourth switching tube to be continuously turned off; and controlling the first switching tube and the second switching tube to alternately perform on and off operations according to a second predetermined number of times during a negative half cycle of the alternating current power supply signal, the controlling of the four switching tubes mainly comprises controlling the first switching tube Q1 and the second switching tube Q2 to alternately open and close the first switching tube Q1 and the second switching tube Q2 during a specified period of the negative half cycle, and controlling one of the third switching tube Q3 and the fourth switching tube Q4 to be continuously closed and the other to be continuously opened so as to realize multi-pulse control of the switching tubes during the positive half cycle of the alternating current power supply signal, and in combination with the multi-pulse control of the positive half cycle, realizing on and off control of the switching devices in the totem-pole type power factor correction module in the multi-pulse control mode, and realizing optimization of the power supply control mode of the small-power-consumption load through adaptation between the multi-pulse control mode and the small-power-consumption load, the purpose of improving the energy efficiency is achieved.

As shown in fig. 9, when the switching operation signal (i.e., the PWM signal) is in the output stop state (i.e., the first switching tube Q1 and the second switching tube Q2 are in the output stop state)) At this time, as shown in FIG. 7, the power supply terminal and the load terminal are disconnected from each other, and the power supply voltage signal is applied

Is still in output state and supplies current signal

The output is stopped.

EXAMPLE III

If it is detected that the operating parameter is greater than or equal to the parameter threshold, controlling the plurality of switching devices to be turned on and off according to the second control mode, specifically including: if the operating parameter is detected to be greater than or equal to the parameter threshold value, acquiring the bus voltage of the load; determining a corresponding intermittent oscillation control strategy according to the relation between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold, so as to control whether to output the switching action signal to the switching device according to the intermittent oscillation control strategy, so that the bus voltage can be changed between the preset lower limit voltage threshold and the preset upper limit voltage threshold, wherein the preset upper limit voltage threshold is larger than the preset lower limit voltage threshold.

In this embodiment, by defining the preset lower limit voltage threshold and the preset upper limit voltage threshold respectively, to define a normal variation range of the bus voltage, as long as the bus voltage is within the normal variation range, the normal operation of the load can be ensured, a control strategy of a corresponding burst (intermittent oscillation) mode can be set aiming at the change of the bus voltage on the premise of ensuring the normal operation of the load, namely an intermittent oscillation control strategy, so as to control the switch action signal to be in an intermittent output state through the intermittent oscillation control strategy, namely, the switching action signal is not required to be continuously in an output state, namely, the switching device is not required to be continuously in a high-frequency action switching state, therefore, the conduction power consumption of the power factor correction module in the drive control circuit can be reduced, and the energy efficiency of electric equipment such as an air conditioner and the like adopting the drive control circuit is improved.

In the foregoing embodiment, optionally, the determining a corresponding intermittent oscillation control strategy according to the relationship between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold specifically includes: and if the switching action signal is in a stop output state and the bus voltage is detected to be reduced to be less than or equal to the preset lower limit voltage threshold, controlling to output the switching action signal to the switching device so as to control the bus voltage to rise to approach the upper limit voltage threshold.

In this embodiment, the driving control circuit is provided with an energy storage inductor and a bus capacitor, the bus voltage, that is, the voltage at two ends of the bus capacitor, is in a cut-off state between the power supply signal and the load on the premise that the switching action signal is in a stop output state, the load is supplied with power through the bus capacitor, the bus voltage is in a falling trend due to the discharge of the bus capacitor, if the bus voltage is detected to be less than or equal to a preset lower limit voltage threshold value, the switching action signal is controlled to be turned on to be output to the switching device, so that the power supply signal supplies power to the load through the high-frequency action of the switching device, and the bus voltage is in a rising trend, on one hand, the power consumption of the switching device is reduced by controlling the switching action signal to be in a stop output state, on the other hand, the state switching operation of the switching action signal is executed by detecting that the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold value, the intermittent oscillation control strategy is formulated, so that the reliability of power supply to the load is ensured.

In any of the foregoing embodiments, optionally, the determining a corresponding intermittent oscillation control strategy according to a relationship between the bus voltage and a preset lower limit voltage threshold, and a preset upper limit voltage threshold specifically further includes: and if the switching action signal is in an output state and the bus voltage is detected to be increased to be greater than or equal to the preset upper limit voltage threshold, controlling to stop outputting the switching action signal to the switching device until the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold so as to finish a change cycle of the bus voltage.

In this embodiment, when the switching action signal (i.e. the PWM signal) is in the output state, the two operation modes can be further divided into two modes: one mode is as shown in fig. 5, the energy storage inductor, the bus capacitor and the load are powered by the power supply signal, that is, the energy storage inductor is in a discharging mode, the other mode is as shown in fig. 6, the energy storage inductor is charged by the power supply signal, and the load is powered by the bus capacitor, that is, an inductor charging mode, the two working modes are switched by the high-frequency switching action of the switching device in the power factor correction module, when the PWM signal is in an output state, the bus voltage is wholly in a rising trend, therefore, in the rising process of the bus voltage, it is required to detect whether the bus voltage rises to be equal to or exceed a preset upper limit voltage threshold, the control stops outputting the switching action signal to the switching device, at this time, the power supply signal and the load are disconnected, the load is powered by the discharging of the bus capacitor, so that the bus voltage is in a falling state, on one hand, the switching function of the switching action signal between output and output stop is realized by controlling and stopping the output of the switching action signal to the switching device so as to realize the formulation of an intermittent oscillation control strategy, and on the other hand, the switching action signal is controlled and stopped to be output on the basis of meeting the requirement of load power supply, so that the loss of the switching device is reduced.

Furthermore, the switching control of the switching signal state can be carried out by adopting a critical value which is as close to the preset voltage upper limit threshold value or as close to the preset voltage lower limit threshold value as possible, so as to obtain the maximum bus voltage change rangeEnclose, i.e.

Fig. 10 and 11 show control signals output to four switching tubes in the intermittent oscillation control mode.

As shown in figures 10 and 11 of the drawings,

the alternating current power supply signal is sent to the power supply,

when the control signal is stopped being outputted to the switching tube for the corresponding supply current, as shown in fig. 7, the power supply terminal and the load terminal are disconnected, and the supply voltage signal is outputted

Is still in output state and supplies current signal

The output is stopped.

As shown in fig. 3, optionally, the controlling to output the switching action signal to the switching device specifically includes:

step 302, inputting reverse switching action signals to the first switching tube and the second switching tube respectively according to a preset period to control the first switching tube and the second switching tube to be opened and closed alternately at high frequency;

step 304, if the alternating current power supply signal is in a positive half period, outputting a low level to the third switch tube, and outputting a high level to the fourth switch tube;

and step 306, if the alternating current power supply signal is in a negative half period, outputting a high level to the third switching tube, and outputting a low level to the fourth switching tube, so that the third switching tube and the fourth switching tube are alternately opened and closed.

As shown in fig. 10, in this embodiment, in the drive control circuit provided with the totem-pole PFC module, by outputting different switching operation signals to the first switching tube and the second switching tube, respectively, and alternately outputting a high level and a low level to the third switching tube and the fourth switching tube, output of a high-frequency control switching operation signal in the totem-pole PFC module is realized, so that when the high-frequency control switching operation signal is output to the switching device (specifically, including the first switching tube and the second switching tube), boost of the bus voltage is realized, and when the output of the switching operation signal is stopped, buck of the bus voltage is realized, thereby realizing application of the intermittent output control strategy in the drive control circuit provided with the totem-pole PFC module.

As shown in fig. 11, after controlling the half-wave duration of the plurality of ac control signals output from the four switching tubes, the output of the control signals to the four switching tubes is turned off, and at this time, the output current is 0.

In any of the above embodiments, optionally, the preset upper limit voltage threshold is determined according to a bus capacitor and a withstand voltage parameter of the switching device.

In any of the foregoing embodiments, optionally, the power supply signal is an ac power supply signal, and the preset lower limit voltage threshold is greater than a peak value of the ac power supply signal.

In this embodiment, due to the boost characteristic of the pfc module, the preset lower voltage threshold is set to be greater than the peak value of the ac power supply signal, so as to ensure the reliability of the load power supply when the bus voltage is greater than or equal to the preset lower voltage threshold and less than or equal to the preset upper voltage threshold.

Example four

As shown in fig. 12, according to the operation control device 120 of an embodiment of the present invention, the operation control device may specifically include a control module 1202 (i.e., a processor) and a current sensor 1204, the current sensor 1204 collects the current of the load, so as to determine the operation parameter of the load according to the load current, and when the processor 1202 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 are not repeated herein.

EXAMPLE five

As shown in fig. 4, a driving control circuit according to an embodiment of the present invention, which is used for controlling a load to be supplied with an ac power supply signal, includes: a power factor correction module comprising a switching device; the driving module is electrically connected with the power factor correction module and used for outputting a switching action signal to the switching device so as to enable the power factor correction module to execute power factor correction operation; the operation control device (including a control module and a bus voltage detection module) according to any of the embodiments above is electrically connected to the driving module and the load, respectively, and is configured to: acquiring the bus voltage of the load; determining a corresponding intermittent oscillation control strategy according to the relation between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold, so as to control whether to output the switching action signal to the switching device according to the intermittent oscillation control strategy, so that the bus voltage is changed between the preset lower limit voltage threshold and the preset upper limit voltage threshold, wherein the preset upper limit voltage threshold is larger than the preset lower limit voltage threshold.

The switching signal may be a pulse width modulation signal (i.e., a PWM signal).

As shown in fig. 8, in the above embodiment, optionally, the power supply signal is an ac power supply signal, the power factor correction module is an H-shaped rectifier module, the switching device includes a first switching tube Q1 and a second switching tube Q2 connected in series, and a third switching tube Q3 and a fourth switching tube Q4 connected in series, a common connection point of the series connection of the third switching tube Q3 and the fourth switching tube Q4 is connected to a live line of the ac power supply signal, a common connection point of the series connection of the first switching tube Q1 and the second switching tube Q2 is connected to a neutral line of the ac power supply signal, a drain of the first switching tube Q1 is connected in series to a drain of the third switching tube Q3, and a common connection point is determined as a first end of the bus voltage, a source of the second switching tube Q2 is connected in series to a source of the fourth switching tube Q4, and a common connection point is determined as a second end of the bus voltage, and a bus capacitor is connected between the first terminal and the second terminal.

In this embodiment, in the drive control circuit provided with the H-shaped rectifier module, by outputting different switching operation signals to the first switching tube Q1 and the second switching tube Q2, respectively, and alternately outputting a high level and a low level to the third switching tube Q3 and the fourth switching tube Q4, output of a high-frequency control switching operation signal in the totem-pole PFC module is realized, so that when the high-frequency control switching operation signal is output to the switching device (specifically, including the first switching tube Q1 and the second switching tube Q2), boost of the bus voltage is realized, when the output of the switching operation signal is stopped, buck of the bus voltage is realized, and application of the intermittent oscillation control strategy to the drive control circuit provided with the totem-pole PFC module is realized.

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 when the computer program is executed by the processor, the operation control method in any of the above embodiments is implemented, so that the computer-readable storage medium includes all the beneficial effects of the operation control method in any of the above embodiments, and details are 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 including a power factor correction module, the power factor correction module including a switching device, and controlling an ac power supply signal to supply power to a load by outputting a switching operation signal to the switching device, the operation control method comprising:

acquiring the operating parameters of the load;

when the operation parameter is detected to be smaller than a parameter threshold value, controlling the switching device to be switched on and off according to a first control mode;

detecting that the operating parameter is greater than or equal to the parameter threshold, controlling the switching device to open and close according to a second control mode,

wherein the first control mode is a multi-pulse control mode of the switching operation signal, and the second control mode is an intermittent oscillation control mode of the switching operation signal;

the plurality of switching devices are constructed to form a bridge module, the switching tubes of each bridge arm of the bridge module are sequentially marked as a first switching tube, a second switching tube, a third switching tube and a fourth switching tube, wherein a common end between the first switching tube and the second switching tube is connected to a first input line of the alternating current power supply signal, a common end between the third switching tube and the fourth switching tube is connected to a second input line of the alternating current power supply signal, a common end between the first switching tube and the third switching tube is connected to a high-voltage line of a bus signal, a common end between the second switching tube and the fourth switching tube is connected to a low-voltage line of the bus signal, and the bus signal is an output signal of the power factor correction module;

if it is detected that the operating parameter is greater than or equal to the parameter threshold, controlling the plurality of switching devices to be turned on and off according to the second control mode, specifically including:

if the operating parameter is detected to be greater than or equal to the parameter threshold value, acquiring the bus voltage of the load;

determining an intermittent oscillation control strategy of the second control mode according to the relation between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold, so as to control whether to output a switching action signal to the first switching tube and the second switching tube according to the intermittent oscillation control strategy, so that the bus voltage can be changed between the preset lower limit voltage threshold and the preset upper limit voltage threshold,

wherein the preset upper limit voltage threshold is greater than the preset lower limit voltage threshold.

2. The operation control method according to claim 1, wherein if it is detected that the operation parameter is smaller than a parameter threshold, controlling the plurality of switching devices to be turned on and off according to the first control mode specifically includes:

when the operating parameter is detected to be smaller than a parameter threshold value, the third switching tube is controlled to be continuously turned off and the fourth switching tube is controlled to be continuously turned on within the positive half cycle of the alternating current power supply signal; and

and controlling the first switching tube and the second switching tube to alternately perform on and off operations according to a first preset number of times in the positive half cycle of the alternating current power supply signal.

3. The operation control method according to claim 2, wherein if it is detected that the operation parameter is smaller than a parameter threshold, the switching devices are controlled to be turned on and off according to the first control mode, and specifically, the method further includes:

in the negative half cycle of the alternating current power supply signal, controlling the third switching tube to be continuously conducted and controlling the fourth switching tube to be continuously turned off; and

and controlling the first switching tube and the second switching tube to alternately perform on and off operations according to a second preset number of times in the negative half cycle of the alternating current power supply signal.

4. The operation control method according to claim 3, wherein the determining of the intermittent oscillation control strategy of the second control mode according to the relationship between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold specifically comprises:

and if the switching action signal is in a stop output state and the bus voltage is detected to be reduced to be less than or equal to the preset lower limit voltage threshold, controlling to output the switching action signal to the switching device so as to control the bus voltage to rise to approach the upper limit voltage threshold.

5. The operation control method according to claim 4, wherein if the switching operation signal is in a stop state and it is detected that the bus voltage drops to less than or equal to the preset lower limit voltage threshold, controlling to output the switching operation signal to the switching device specifically includes:

predicting whether the bus voltage can drop to be less than or equal to the preset lower limit voltage threshold value in the next half period at the zero crossing point of each alternating current power supply signal in the bus voltage dropping process;

and if the bus voltage is predicted to be reduced to be less than or equal to the preset lower limit voltage threshold value in the next half period, starting to output the switching action signal at the current zero crossing point.

6. The operation control method according to claim 4, wherein the determining a corresponding intermittent output control strategy according to the relationship between the bus voltage and a preset lower limit voltage threshold and a preset upper limit voltage threshold specifically further comprises:

and if the switching action signal is in an output state and the bus voltage is detected to be increased to be greater than or equal to the preset upper limit voltage threshold, controlling to stop outputting the switching action signal to the switching device until the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold so as to finish a change cycle of the bus voltage.

7. The operation control method according to claim 4, wherein the controlling of the output of the switching operation signal to the switching device specifically includes:

inputting reverse switching action signals to the first switching tube and the second switching tube respectively according to a preset period so as to control the first switching tube and the second switching tube to be alternately opened and closed at high frequency;

if the alternating current power supply signal is in a positive half period, outputting a low level to the third switching tube, and outputting a high level to the fourth switching tube;

and if the alternating current power supply signal is in a negative half period, outputting a high level to the third switching tube, and outputting a low level to the fourth switching tube, so that the third switching tube and the fourth switching tube are alternately opened and closed.

8. The operation control method according to any one of claims 1 to 7,

and determining the preset upper limit voltage threshold according to the withstand voltage parameters of the bus capacitor and the switching device.

9. The operation control method according to any one of claims 1 to 7,

the preset lower limit voltage threshold is larger than the peak value of the alternating current power supply signal.

10. The operation control method according to any one of claims 1 to 7,

11. 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 10.

12. A drive control circuit for controlling the application of an ac supply signal to a load, comprising:

a power factor correction module comprising a switching device;

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

the operation control device according to claim 11, electrically connected to the driving module and the load, respectively, the operation control device being configured to:

acquiring an operation parameter of the load, wherein the operation parameter corresponds to the size of the load;

determining a control mode for the switching device based on the operating parameter,

the control mode includes a first control module and a second control mode, the first control mode is a multi-pulse control mode of the switching action signal, and the second control mode is an intermittent oscillation control mode of the switching action signal.

13. The drive control circuit according to claim 12,

the power factor correction module is a bridgeless totem-pole type power factor correction module and comprises a plurality of switching devices, the plurality of switching devices comprise a first switching tube and a second switching tube which are connected in series, and a third switch tube and a fourth switch tube which are connected in series, wherein a common connecting point of the third switch tube and the fourth switch tube after being connected in series is connected with a zero line of the alternating current power supply signal, the common connection point of the first switch tube and the second switch tube after being connected in series is connected with the live wire of the alternating current power supply signal, the drain electrode of the first switch tube is connected with the drain electrode of the third switch tube in series, and the common connection point is determined as the first end of the bus voltage, the source electrode of the second switching tube is connected with the source electrode of the fourth switching tube in series, and defining the common connection point as a second terminal of the bus voltage and connecting a bus capacitance between the first terminal and the second terminal.

14. An appliance, comprising:

a load;

the drive control circuit according to claim 12 or 13, the drive control circuit being interposed between an ac supply signal and a load, the drive control circuit being configured to control the ac supply signal to supply power to the load.

15. The home device of claim 14,

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.

16. 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 10.