CN112019032B

CN112019032B - Operation control method, device, circuit, household appliance and computer storage medium

Info

Publication number: CN112019032B
Application number: CN201910473282.XA
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: 2022-04-19
Anticipated expiration: 2039-05-31
Also published as: CN112019032A

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 a load, wherein the operation parameter corresponds to the size of the load; detecting that the operation parameter is smaller than a first parameter threshold value, and controlling the switching tube to be switched on and off according to a first control mode; and detecting that the operation parameter is greater than or equal to a first parameter threshold value, and controlling the switching tubes to be switched on and off according to a second control mode, wherein the first control mode is an uncontrolled rectification mode, action signals are not input into the switching tubes in the uncontrolled rectification mode, and the second control mode is an intermittent oscillation control mode. According to the technical scheme, the on-state power consumption of the switching tube is reduced while the normal operation of the load can be met, the efficiency of power factor correction in the circuit can be improved, 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

With the development of Power electronic technology, active PFC (Power Factor Correction) technology is widely used due to its advantages of high Power Factor, small harmonic current, stable output voltage, etc.

In the related art, the control scheme of the high frequency switch currently adopted by the bridgeless totem-pole PFC circuit has room for improvement although the efficiency is higher than that of a BOOST-PFC (BOOST-type power factor correction module) circuit. (requiring modification)

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, a common bridgeless totem-pole PFC module usually works in a high-frequency mode, but the high-frequency mode is only suitable for a large load, when the load is small, the conduction loss of the switching tube is increased, the efficiency is low, which not only causes high hardware loss and high power consumption of a driving control circuit, but also is not beneficial to further improving the energy efficiency of the load.

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 tube, and the switching tube outputs a high-frequency action signal to control an ac power supply signal to supply power to a load, and the operation control method includes: acquiring the operating parameters of the load; detecting that the operating parameter is smaller than a first parameter threshold value, and controlling the switching tube to be switched on and off according to a first control mode; and controlling the switching tubes 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 first parameter threshold, wherein the first control mode is an uncontrolled rectification mode, action signals are not input into the switching tubes in the uncontrolled rectification mode, and the second control mode is an intermittent oscillation control mode.

In the technical scheme, in the process of controlling the alternating current power supply signal to supply power to the load through the power factor control module, aiming at the load with lower power consumption, if a high-frequency control signal is continuously output to a switching tube, unnecessary switching loss is increased, the size of the load is determined according to the operation parameter by acquiring the operation parameter of the load, the first parameter threshold value which is the same as the operation parameter is adopted as a division standard of the size of the load, specifically, when the operation parameter is detected to be smaller than the first parameter threshold value, the fact that the alternating current power supply signal can be ensured to normally supply power to the load by adopting an uncontrolled rectification mode is indicated, when the operation parameter is detected to be larger than or equal to the first parameter threshold value, the fact that an intermittent oscillation control mode is required to output a high-frequency action signal to the switching tube in the power factor correction module is indicated, in order to realize efficient control of power supply to a load, in the first control mode, a high-frequency control signal does not need to be output to a switching tube, so that no switching loss is generated, and in the second control mode, a high-frequency operation signal is only intermittently output to the switching tube, so that the conduction loss can be reduced compared with the continuous output control mode.

The high-frequency operation signal is specifically a Pulse Width Modulation (PWM) signal.

The uncontrolled rectification mode is that no control signal is output to the switching tube, and rectification output is realized only through the freewheeling diode reversely connected in parallel with the switching tube, so that the uncontrolled rectification mode is suitable for the use occasions of small loads.

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.

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

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

in the above technical solution, optionally, the plurality of switch tubes are configured to form a bridge module, the switch tubes of each bridge arm of the bridge module are 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 the bus signal is connected to a common end between the first switching tube and the third switching tube, the common end between the second switch tube and the fourth switch tube is connected with a low-voltage line of the bus signal, a bus capacitor is connected between the high-voltage line and the low-voltage line, and the voltage at two ends of the bus capacitor is determined as the bus voltage of the load; and under the first control mode, the rectification operation of the alternating current power supply signal is executed by controlling the conduction of the freewheeling diode.

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 tubes, and a control logic of the bridgeless totem-pole power factor correction module is more complex than that of a BOOST-type power factor correction module (BOOST-PFC), 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.

Specifically, in the uncontrolled rectifying mode, since a high-frequency control signal is not output to the switching tube, the totem-pole power factor correction module can be simplified as a rectifying module formed by four diodes, according to the one-way conduction characteristic of the freewheeling diode, when the voltage at two ends of the freewheeling diode is greater than the conduction voltage, the power supply output is realized, and the bus capacitor and the load are supplied with power through the alternating-current power supply signal.

In any one of the above technical solutions, optionally, the detecting that the operating parameter is greater than or equal to the first parameter threshold value, and controlling the switching tubes to be turned on and off according to the second control mode specifically includes: acquiring the bus voltage of the load; according to the relation between the bus voltage and a preset lower limit voltage threshold value and a preset upper limit voltage threshold value, determining an intermittent oscillation control strategy of the second control mode, and controlling whether to output a high-frequency action signal to the first switch tube and the second switch tube according to the intermittent oscillation control strategy so that the bus voltage can be changed between the preset lower limit voltage threshold value and the preset upper limit voltage threshold value, wherein the preset upper limit voltage threshold value is larger than the preset lower limit voltage threshold value.

In the technical scheme, in the second control mode, by respectively limiting the preset lower limit voltage threshold and the 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 high-frequency action signal to be in an intermittent output state through the intermittent oscillation control strategy, namely, the high-frequency action signal is not required to be continuously in an output state, namely, the switch tube is not required to be continuously in a high-frequency action switch state, therefore, the power consumption of the power factor correction module in the drive control circuit can be reduced, and the energy efficiency of electrical equipment (such as an air conditioner) adopting the drive control circuit is improved.

The high-frequency 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 by collecting an operation parameter of the load, so as to be determined based on the operation parameter.

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, also can be the direct current supply signal after rectifier rectification, through the limited preset lower limit voltage threshold and the preset upper limit voltage threshold, and the threshold interval formed by the lower limit voltage threshold and the preset upper limit voltage threshold, the reliability of the drive control circuit to supply power to the load is ensured, through the intermittent oscillation control strategy formed based on the lower limit voltage threshold and the preset upper limit voltage threshold, the conduction loss of the switching tube is reduced, and the execution efficiency of power factor correction can be improved.

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 includes: and if the high-frequency 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 high-frequency action signal to the switching tube so as to control the bus voltage to rise and approach the upper limit voltage threshold.

In the technical scheme, an energy storage inductor and a bus capacitor are arranged in a driving control circuit, the bus voltage is the voltage at two ends of the bus capacitor, on the premise that a high-frequency 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 high-frequency action signal is controlled to be started to be output to a switch tube so as to supply power to the load through the high-frequency action of the switch tube, and the bus voltage can be in an ascending trend, on one hand, the power consumption of the switch tube is reduced by controlling the high-frequency action signal to be in a stop output state, on the other hand, the state switching operation of the high-frequency 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 high-frequency action signal to the switching tube to the restart of the output of the high-frequency action signal, namely, the time period of the stop of the switching tube 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 switching the high-frequency action signal can be started, that is, the high-frequency action signal is started to be output to the switching tube, 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 of the above technical solutions, optionally, if the high-frequency operating signal is in a state of stopping output 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 high-frequency operating signal to the switching tube 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 high-frequency action signal at the current zero crossing point.

In the technical scheme, when the high-frequency action signal is in an output state or in an output stopping state, the duration of the current state and the state of the corresponding alternating current power supply signal are respectively detected, if a zero crossing point of the alternating current power supply signal and the duration of the corresponding current state meet a preset switching condition, namely the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold value in the next half period, the switching operation of the high-frequency action signal is executed at the zero crossing point, so that after the high-frequency action signal is in the output state for a period of time, the high-frequency action signal is switched to the output stopping state at a certain zero crossing point of the alternating current power supply signal without a period of time, one running period of a BURST (intermittent oscillation) mode is completed, on the one hand, the conduction power consumption of a PFC switch module in the driving control circuit can be reduced by realizing the output of the high-frequency action signal in the BURST mode, the energy efficiency of electrical equipment (such as an air conditioner) adopting the drive control circuit is improved, on the other hand, the regular switching of high-frequency action signals in a BURST mode can be realized, on the other hand, the stability of switching operation can be improved by executing the switching operation of an output state at a zero crossing point, and when the output of the high-frequency action signals is stopped, the energy of an energy storage inductor on an output flow path can be effectively released, so that the impact on a switch tube is prevented.

In any one of the above technical solutions, optionally, the determining a corresponding intermittent output 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: if the high-frequency 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 value, controlling to stop outputting the high-frequency action signal to the switching tube until the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold value so as to finish a change cycle of the bus voltage.

In this technical solution, when the high-frequency operation signal (i.e. PWM signal) is in an 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 tube 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 high-frequency action signal is controlled to stop being output to the switching tube, 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 high-frequency action signal is controlled to stop being output to the switching tube, the switching function of the high-frequency action signal between output and stop output is realized, so that the formulation of an intermittent oscillation control strategy is realized, and on the other hand, the high-frequency action signal is controlled to stop 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 switching the high-frequency action signal can be started, that is, the high-frequency action signal is stopped being output to the switch tube, 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, the control of switching the state of the high-frequency action signal can be carried out by adopting a critical value which is as close to the upper threshold value of the preset voltage or as close to the lower threshold value of the preset voltage as possible so as to obtain the maximum bus voltage change range, namely V_{dc_max}-V_{dc_min}Thereby realizing the efficiency improvement of burst modeThe result is maximized and the most efficient PFC function is achieved.

In any one of the above technical solutions, optionally, the controlling to output the high-frequency operating signal to the switching tube specifically includes: inputting reverse high-frequency action signals to the first switch tube and the second switch tube respectively so as to control the first switch tube and the second switch 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 high-frequency 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 action signal in the totem-pole type PFC module is realized, the boost of the bus voltage is realized when the high-frequency control action signal is output to the switch tubes (specifically comprising the first switch tube and the second switch tube), the buck of the bus voltage is realized when the high-frequency action signal is stopped to be output, 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 the withstand voltage parameters of the bus capacitor and the switching tube.

In any of the above technical solutions, optionally, 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 any one of the above technical solutions, optionally, the control mode further includes a third control mode, where the third control mode is a multi-pulse control mode, and when it is detected that the operating parameter is smaller than a first parameter threshold value, the third control mode does not output an operation signal to the plurality of switching tubes according to the first control mode, the method further includes: detecting that the operating parameter is greater than or equal to the first parameter threshold, and detecting whether the operating parameter is greater than or equal to a second parameter threshold; if the operating parameter is detected to be smaller than the second parameter threshold value, not outputting action signals to the plurality of switching tubes according to the third control mode; and if the operating parameter is detected to be greater than or equal to the second parameter threshold value, controlling the switching tubes to be switched on and off according to the second control mode, wherein the second parameter threshold value is greater than the first parameter threshold value.

In the technical scheme, on the basis of defining the first parameter threshold, the definition of the second parameter threshold can be further increased, so that on the basis of detecting that the operation parameter is greater than or equal to the first parameter threshold, whether the operation parameter is greater than or equal to the second parameter threshold is further detected, when the operation parameter is greater than or equal to the second parameter threshold, the switching on and the switching off of the switching tube are continuously controlled according to the second control mode, and when the operation parameter is greater than or equal to the first parameter threshold and less than the second parameter threshold, the switching on and the switching off of the switching tube can be controlled according to the third control mode (namely, a multi-pulse control mode), so that the accuracy of power supply control for loads with different power consumptions is further improved, and the improvement of the control efficiency is realized on the basis of the improvement of the control accuracy.

The multi-pulse control mode refers to that a switching tube of a power factor correction module (namely a PFC module) is alternately switched for multiple times within a specific time end so as to store energy for an inductor and release the energy for the inductor, thereby changing the waveform of an input current, improving the harmonic wave and the power factor of the input current, and reducing the switching loss by reducing the switching times relatively to the continuous output of a high-frequency 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 tubes 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 tubes outputs a high level and the other outputs a low level.

In any of the above technical solutions, optionally, if it is detected that the operating parameter is smaller than the second parameter threshold, not outputting an action signal to the plurality of switching tubes according to the third control mode specifically includes: if the operating parameter is detected to be smaller than a preset 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-off operation according to a preset number of times in 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 of the above technical solutions, optionally, if it is detected that the operating parameter is smaller than the second parameter threshold, not outputting an action signal to the plurality of switching tubes according to the third control mode, specifically, the method further includes: if the operation parameter is detected to be larger than or equal to the preset operation parameter threshold value, acquiring the bus voltage of the load; and controlling the first switching tube and the second switching tube to alternately perform on-off operation according to a preset number of times in a 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 switching control on the switching tubes in the 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 to achieve the purpose of improving energy efficiency.

In any of the above solutions, optionally, the operation parameter includes at least one of a load current, a load power, a compressor operation pressure, a compressor frequency, and the like.

In the technical scheme, if the operation parameter is a load current, the preset operation parameter threshold is a load current threshold, if the operation parameter is a load power, the preset operation parameter threshold is a load power threshold, if the operation parameter is a compressor operation pressure, the preset operation parameter threshold is a preset pressure threshold, and if the operation parameter is a compression frequency, the preset operation parameter threshold is a preset frequency 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: 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 high-frequency 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 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; detecting that the operating parameter is smaller than a first parameter threshold value, and controlling the switching tube to be switched on and off according to a first control mode; and controlling the switching tubes 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 first parameter threshold, wherein the first control mode is an uncontrolled rectification mode, action signals are not input into the switching tubes in the uncontrolled rectification mode, and the second control mode is an intermittent oscillation control mode.

In the above technical solution, optionally, the power factor correction module is a bridgeless totem-pole power factor correction module, the switch tube comprises a plurality of switch tubes, the switch tubes comprise a first switch tube and a second switch tube which are 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 the N 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 L line of the alternating current power supply signal, the drain electrode of the first switch tube is connected in series with the drain electrode of the third switch tube, 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.

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 shows a schematic diagram of control signals of the drive control circuit of FIG. 8 in a first control mode;

FIG. 10 is a schematic diagram showing a power supply signal when the driving control circuit in FIG. 8 outputs a PWM signal to the switching tube;

fig. 11 is a graph showing a control signal of the drive control circuit in fig. 8 in a second control mode;

fig. 12 is a graph showing a control signal of the drive control circuit in fig. 8 in a third control mode;

fig. 13 shows a schematic block diagram of an operation control apparatus according to an 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 driving control circuit, the driving control circuit includes a power factor correction module, the power factor correction module includes a switch tube, and the power factor correction module controls a power supply signal to supply power to a load by outputting a high-frequency action signal to the switch tube, and the operation control method includes:

102, acquiring the operating parameters of the load;

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

and 106, detecting that the operating parameter is greater than or equal to the first parameter threshold, and controlling the switching tubes to be switched on and off according to a second control mode, wherein the first control mode is an uncontrolled rectification mode, action signals are not input into the switching tubes in the uncontrolled rectification mode, and the second control mode is an intermittent oscillation control mode.

In the embodiment, in the process of controlling the ac power supply signal to supply power to the load through the power factor control module, for a load with low power consumption, if a high-frequency control signal is continuously output to the switching tube, unnecessary switching loss is increased, the size of the load is determined according to the operation parameters by collecting the operation parameters of the load, and the first parameter threshold of the same type as the operation parameters is combined to be used as a division standard of the size of the load, specifically, when the operation parameters are detected to be smaller than or equal to the first parameter threshold, it is indicated that the ac power supply signal can be ensured to normally supply power to the load by adopting the uncontrolled rectification mode, and when the operation parameters are detected to be larger than or equal to the first parameter threshold, it is indicated that an intermittent oscillation control mode is required to output a high-frequency action signal to the switching tube in the power factor correction module, so as to realize efficient control of power supply to the load, in the first control mode, since it is not necessary to output a high-frequency control signal to the switching tube, switching loss is not generated, and in the second control mode, since a high-frequency operation signal is intermittently output to the switching tube, conduction loss can be reduced compared to the continuous output control mode.

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

In the above embodiment, optionally, the plurality of switching tubes are configured 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 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 the bus signal is connected to a common end between the first switching tube and the third switching tube, the common end between the second switch tube and the fourth switch tube is connected with a low-voltage line of the bus signal, a bus capacitor is connected between the high-voltage line and the low-voltage line, and the voltage at two ends of the bus capacitor is determined as the bus voltage of the load; and under the first control mode, the rectification operation of the alternating current power supply signal is executed by controlling the conduction of the freewheeling diode.

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 tubes and the control logic thereof is more complex than that of the BOOST-type power factor correction module (BOOST-PFC), it is more necessary to improve the efficiency of power factor correction and reduce the switching power consumption by the first control mode and the second control mode different from the continuous high-frequency output control mode in the prior art.

As shown in fig. 9, U_SAC supply signal, I_SFor the corresponding power supply current, in an uncontrolled rectification mode, a high-frequency control signal is not output to the switching tube, so that the totem-pole power factor correction module can be simplified and regarded as a rectification module consisting of four diodes, according to the one-way conduction characteristic of a fly-wheel diode, when the voltage at two ends of the fly-wheel diode is greater than the conduction voltage, the power supply output is realized, and the bus capacitor and the load are supplied with power through an alternating current power supply signalConduction losses of the tube.

Example two

In any of the above embodiments, optionally, the detecting that the operating parameter is greater than or equal to the first parameter threshold value, and controlling the switching tubes to open and close according to the second control mode specifically includes: acquiring the bus voltage of the load; according to the relation between the bus voltage and a preset lower limit voltage threshold value and a preset upper limit voltage threshold value, determining an intermittent oscillation control strategy of the second control mode, and controlling whether to output a high-frequency action signal to the first switch tube and the second switch tube according to the intermittent oscillation control strategy so that the bus voltage can be changed between the preset lower limit voltage threshold value and the preset upper limit voltage threshold value, wherein the preset upper limit voltage threshold value is larger than the preset lower limit voltage threshold value.

In this embodiment, in the second control mode, 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 high-frequency action signal to be in an intermittent output state through the intermittent oscillation control strategy, namely, the high-frequency action signal is not required to be continuously in an output state, namely, the switch tube is not required to be continuously in a high-frequency action switch state, therefore, the power consumption of the power factor correction module in the drive control circuit can be reduced, and the energy efficiency of electrical equipment (such as an air conditioner) adopting the drive control circuit is improved.

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.

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 high-frequency 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 high-frequency action signal to the switching tube so as to control the bus voltage to rise and 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 high-frequency 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 high-frequency action signal is controlled to be turned on to be output to the switching tube, so that the power supply signal supplies power to the load through the high-frequency action of the switching tube, and the bus voltage is in a rising trend, on one hand, the power consumption of the switching tube is reduced by controlling the high-frequency action signal to be in a stop output state, on the other hand, the state switching operation of the high-frequency action signal is executed when the bus voltage is detected 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: if the high-frequency 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 value, controlling to stop outputting the high-frequency action signal to the switching tube until the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold value so as to finish a change cycle of the bus voltage.

In this embodiment, when the high-frequency 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 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 tube 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 high-frequency action signal to the switching tube, at this time, the circuit is broken between the power supply signal and the load, the bus capacitor discharges to power the load, therefore, the bus voltage is in a falling state, the switching function of the high-frequency action signal between output and output stop is realized by controlling and stopping the output of the high-frequency action signal to the switching tube, so that the formulation of an intermittent oscillation control strategy is realized, and on the other hand, the high-frequency 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 a switching device is reduced.

Furthermore, the control of switching the state of the high-frequency action signal can be carried out by adopting a critical value which is as close to the upper threshold value of the preset voltage or as close to the lower threshold value of the preset voltage as possible so as to obtain the maximum bus voltage change range, namely V_{dc_max}-V_{dc_min}Thereby maximizing the efficiency improvement result of the burst mode and realizing the most efficient PFC function.

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

As shown in fig. 10 and 11, U_SAC supply signal, I_SIs corresponding toThe supply current.

As shown in fig. 10, in this embodiment, in the drive control circuit provided with the totem-pole type power factor correction module, by outputting different high-frequency 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, the output of the high-frequency control operation signal in the totem-pole type PFC module is realized, so that when the high-frequency control operation signal is output to the switching tubes (specifically including the first switching tube and the second switching tube), the boost of the bus voltage is realized, and when the output of the high-frequency operation signal is stopped, the buck of the bus voltage is realized, thereby realizing the application of the intermittent output control strategy in the drive control circuit provided with the totem-pole type 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.

When the control signal is stopped being outputted to the switching tube, as shown in fig. 7, the power supply terminal and the load terminal are disconnected, and the power supply voltage signal U is outputted_sIs still in output state and supplies current signal I_sThe output is stopped.

As shown in fig. 2, optionally, if it is detected that the operating parameter is smaller than the second parameter threshold, not outputting an action signal to the plurality of switching tubes according to the third control mode specifically includes:

202, inputting reverse high-frequency action signals to the first switch tube and the second switch tube respectively to control the first switch tube and the second switch tube to be opened and closed alternately at high frequency;

step 204, 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 206, 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 any of the above embodiments, optionally, the preset upper limit voltage threshold is determined according to the bus capacitor and a withstand voltage parameter of the switching tube.

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 III

As shown in fig. 3, if it is detected that the operation parameter is smaller than a preset operation parameter threshold, controlling the plurality of switching tubes to be opened and closed according to the first control mode includes: if the operating parameter is detected to be smaller than a preset 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-off operation according to a preset number of times in the positive half cycle of the alternating current power supply signal. And

if the operation parameter is detected to be larger than or equal to the preset operation parameter threshold value, acquiring the bus voltage of the load; and controlling the first switching tube and the second switching tube to alternately perform on-off operation according to a preset number of times in a negative half cycle of the alternating current power supply signal.

Step 302, detecting that the operation parameter is smaller than a preset operation parameter threshold value;

step 304, 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 306, and passing a first time period from the starting zero crossing point of the positive half cycle;

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

step 310, 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 312, 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 314, controlling the third switching tube to be continuously turned on and controlling the fourth switching tube to be continuously turned off in the negative half cycle of the alternating current power supply signal;

step 316, and passing the first duration from the starting zero crossing of the negative half cycle;

step 318, controlling the first switch tube and the second switch tube to be alternately conducted for multiple times;

step 320, controlling the second switch tube to be turned on for the second time period and controlling the first switch tube to be turned off for the second time period;

and 322, respectively controlling the first switching tube and the second switching tube to be turned off for a third time period so as to complete the negative half cycle.

Fig. 12 shows control signals output to four switching tubes in the multi-pulse control mode.

As shown in FIG. 12, U_SAC supply signal, I_SFor 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, during the negative half-cycle of the ac supply signal, the control of the four switching tubes mainly includes, for the first switching tube Q1 and the second switching tube Q2, during the designated period of the negative half cycle, the first switch tube Q1 and the second switch tube Q2 are controlled to be alternately opened and closed, and for the third switch tube Q3 and the fourth switch tube Q4, one of the two is controlled to be continuously closed, and the other is controlled to be continuously opened so as to realize multi-pulse control on the switching tube in the positive half period of the alternating current power supply signal, and in combination with the multi-pulse control in the positive half period, the switching tube in the totem-pole type power factor correction module is controlled to be opened and closed in a multi-pulse control mode, through the adaptation between the multi-pulse control mode and the low-power-consumption load, the power supply control mode of the low-power-consumption load is optimized, and the purpose of improving the energy efficiency is achieved.

As shown in fig. 12, when the high-frequency 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), as shown in fig. 7, the power supply terminal and the load terminal are disconnected, and the power supply voltage signal U is fed_sIs still in output state and supplies current signal I_sThe output is stopped.

Example four

As shown in fig. 13, according to the operation control device 130 of an embodiment of the present invention, the operation control device may specifically include a control module 1302 (i.e., a processor) and a current sensor 1304, the current sensor 1304 collects a current of the load, so as to determine an operation parameter of the load according to the load current, and when the processor 1302 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: 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 high-frequency 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 (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 an operation parameter of the load, wherein the operation parameter corresponds to the size of the load; detecting that the operating parameter is smaller than a first parameter threshold value, and controlling the switching tube to be switched on and off according to a first control mode; and controlling the switching tubes 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 first parameter threshold, wherein the first control mode is an uncontrolled rectification mode, action signals are not input into the switching tubes in the uncontrolled rectification mode, and the second control mode is an intermittent oscillation control mode.

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 rectification module, the switching tube 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 an L 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 an N 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 high-frequency 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 operation signal in the totem-pole PFC module is realized, so that when the high-frequency control operation signal is output to the switching tubes (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 high-frequency 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 comprising a power factor correction module, the power factor correction module being a bridgeless totem-pole type power factor correction module, the power factor correction module comprising a plurality of switching tubes for controlling an ac power supply signal to supply power to a load by outputting a high-frequency action signal to the switching tubes, the operation control method comprising:

acquiring the operating parameters of the load;

detecting that the operating parameter is smaller than a first parameter threshold value, and controlling the switching tube to be switched on and off according to a first control mode;

when the operation parameter is detected to be larger than or equal to the first parameter threshold value, the switching tube is controlled to be opened and closed according to a second control mode,

the first control mode is an uncontrolled rectifying mode, in which action signals are not input to the plurality of switching tubes, and the second control mode is an intermittent oscillation control mode;

the plurality of switch tubes form a bridge type module, and the switch tubes of each bridge arm of the bridge type module are sequentially marked as a first switch tube, a second switch tube, a third switch tube and a fourth switch tube;

the detecting that the operating parameter is greater than or equal to the first parameter threshold value and controlling the switching tubes to be switched on and off according to the second control mode specifically includes:

the detection that the operating parameter is greater than or equal to the first parameter threshold;

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 high-frequency 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 a common terminal 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 terminal 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 terminal between the first switching tube and the third switching tube is connected to a high voltage line of a bus signal, a common terminal between the second switching tube and the fourth switching tube is connected to a low voltage line of the bus signal, a bus capacitor is connected between the high voltage line and the low voltage line, and a voltage across the bus capacitor is determined as a bus voltage of the load;

and under the first control mode, the rectification operation of the alternating current power supply signal is executed by controlling the conduction of the freewheeling diode.

3. The operation control method according to claim 1, wherein 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 comprises:

and if the high-frequency 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 high-frequency action signal to the switching tube so as to control the bus voltage to rise and approach the upper limit voltage threshold.

4. The operation control method according to claim 3, wherein if the high-frequency 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 high-frequency operation signal to the switching tube, specifically comprising:

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 high-frequency action signal at the current zero crossing point.

5. The operation control method according to claim 3, 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:

if the high-frequency 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 value, controlling to stop outputting the high-frequency action signal to the switching tube until the bus voltage is reduced to be less than or equal to the preset lower limit voltage threshold value so as to finish a change cycle of the bus voltage.

6. The operation control method according to claim 3, wherein the controlling of the output of the high-frequency operation signal to the switching tube specifically includes:

inputting reverse high-frequency action signals to the first switch tube and the second switch tube respectively so as to control the first switch tube and the second switch 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.

7. The operation control method according to claim 2,

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

8. The operation control method according to any one of claims 1 to 6,

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

9. The operation control method according to any one of claims 2 to 6, wherein the control modes further include a third control mode, the third control mode is a multi-pulse control mode, the operation parameter is detected to be smaller than a first parameter threshold value, no action signal is output to the plurality of switching tubes according to the first control mode, the multi-pulse control mode is that the switching tubes of the power factor correction module are alternately switched on and off a plurality of times within a specific time period, and further comprising:

detecting that the operating parameter is greater than or equal to the first parameter threshold, and detecting whether the operating parameter is greater than or equal to a second parameter threshold;

if the operating parameter is detected to be smaller than the second parameter threshold value, not outputting action signals to the plurality of switching tubes according to the third control mode;

if the operation parameter is detected to be larger than or equal to the second parameter threshold value, controlling the plurality of switch tubes to be opened and closed according to the second control mode,

wherein the second parameter threshold is greater than the first parameter threshold.

10. The operation control method according to claim 9, wherein the step of not outputting an operation signal to the plurality of switching tubes according to the third control mode if it is detected that the operation parameter is smaller than the second parameter threshold value specifically includes:

if the operating parameter is detected to be smaller than a preset 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

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

11. The operation control method according to claim 10, wherein if it is detected that the operation parameter is smaller than the second parameter threshold, no operation signal is output to the plurality of switching tubes according to the third control mode, and specifically, the method further includes:

if the operation parameter is detected to be larger than or equal to the preset operation parameter threshold value, acquiring the bus voltage of the load;

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

12. The operation control method according to any one of claims 1 to 6,

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

13. 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 12.

14. A drive control circuit for controlling the application of an ac 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 a high-frequency 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 13, electrically connected to the driving module and the load, respectively, the operation control device being configured to:

acquiring the operating parameters of the load;

the first control mode is an uncontrolled rectifying mode in which no operation signal is input to the plurality of switching tubes, and the second control mode is an intermittent oscillation control mode.

15. The drive control circuit of claim 14,

the power factor correction module is a bridgeless totem-pole type power factor correction module and comprises a plurality of switch tubes, the switch tubes of each bridge arm of the bridge type module are 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 switching tube and the third switching tube, and a common end between the second switching tube and the fourth 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.

16. An appliance, comprising:

a load;

the drive control circuit according to claim 14 or 15, 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.

17. The home device of claim 16,

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.

18. 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 12.