CN112019019A - Drive control method, device, household appliance and computer readable storage medium - Google Patents

Drive control method, device, household appliance and computer readable storage medium Download PDF

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Publication number
CN112019019A
CN112019019A CN201910472244.2A CN201910472244A CN112019019A CN 112019019 A CN112019019 A CN 112019019A CN 201910472244 A CN201910472244 A CN 201910472244A CN 112019019 A CN112019019 A CN 112019019A
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CN
China
Prior art keywords
mode
signal
bus signal
power supply
bus
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Pending
Application number
CN201910472244.2A
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Chinese (zh)
Inventor
曾贤杰
堀部美彦
黄招彬
文先仕
朱良红
王明明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Application filed by Midea Group Co Ltd, GD Midea Air Conditioning Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201910472244.2A priority Critical patent/CN112019019A/en
Priority to JP2021571046A priority patent/JP7331144B2/en
Priority to PCT/CN2019/103216 priority patent/WO2020237876A1/en
Publication of CN112019019A publication Critical patent/CN112019019A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

The invention provides a drive control method, a device, household electrical appliance equipment and a computer readable storage medium, wherein the drive control method comprises the following steps: detecting a power supply signal in real time, and controlling the bridge circuit to work in a first mode or a second mode according to the power supply signal; if the bridge circuit works in the second mode, determining that the alternating current signal in the power supply signal detected in real time belongs to a positive half-cycle waveform or a negative half-cycle waveform; and determining the conduction period of the switching devices of the bridge circuit according to the dependency relationship between the alternating current signal and the positive half-cycle waveform and the dependency relationship between the alternating current signal and the negative half-cycle waveform, wherein the first mode is configured to be a mode for controlling the switching devices to be turned off, and the second mode is configured to be a mode for operating the switching devices according to a specified pulse driving signal, so that a given current in the second mode follows the alternating current voltage input to the load. By the technical scheme, the working efficiency of driving the load to operate is improved, and the power consumption of a circuit and the hardware loss are reduced.

Description

Drive control method, device, household appliance and computer readable storage medium
Technical Field
The present invention relates to the field of drive control, and in particular, to a drive control method, a drive control apparatus, 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 PFC module is higher than that of the Boost PFC module, but the bridgeless totem-pole PFC module usually works in a high-frequency or power-frequency mode, so that the hardware loss and the power consumption of the driving control circuit are high, and the energy efficiency of the load is not further improved.
Moreover, any discussion of the prior art throughout the specification is not an admission that the prior art is necessarily known to a person of ordinary skill in the art, and any discussion of the prior art throughout the specification is not an admission that the prior art is necessarily widely known or forms part of common general knowledge in the field.
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, a first aspect of the present invention proposes a drive control method.
A second aspect of the present invention is to provide a drive control apparatus.
A third aspect of the present invention is to provide a home appliance.
A fourth aspect of the invention is directed to a computer-readable storage medium.
In the technical solution of the first aspect of the present invention, a driving control method is provided, where the driving control circuit is provided with a bridge circuit, four bridge arms of the bridge circuit are respectively provided with a switch device, which is respectively referred to as a first switch device, a second switch device, a third switch device, and a fourth switch device, a common end of the first switch device and the second switch device is connected to a live wire, a common end of the third switch device and the fourth switch device is connected to a zero wire, a common end of the first switch device and the third switch device is connected to a high-voltage bus, a common end of the second switch device and the fourth switch device is connected to a low-voltage bus, and the bridge circuit is configured to control a power supply signal to supply power to a load, and the driving control method includes: detecting a power supply signal in real time, and controlling the bridge circuit to work in a first mode or a second mode according to the power supply signal; if the bridge circuit works in the second mode, determining that the alternating current signal in the power supply signal detected in real time belongs to a positive half-cycle waveform or a negative half-cycle waveform; and determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the alternating current signal and the positive half-cycle waveform and the dependency relationship between the alternating current signal and the negative half-cycle waveform, wherein the first mode is configured as a mode for controlling the switching device to be turned off, and the second mode is configured as a mode for operating the switching device according to a specified pulse driving signal, so that a given current in the second mode follows the alternating current voltage input to the load.
According to the driving control method provided by the invention, a circuit connected with a switching tube according to the mode is usually referred to as a totem-pole type bridge circuit for short, a pulse driving signal is stopped to be output to a switching device in a first mode, the switching device is in a cut-off mode and can be recorded as an intermittent mode, a pulse driving signal is output to the switching device in a second mode, the switching device is in a high-frequency conduction mode and can be recorded as an operating mode, the bus voltage is pulled high in the operating mode, and the capacitive element discharges to reduce the bus voltage in the intermittent mode, so that the bridge circuit is in an operating state only in a part of time, namely, the switching device only consumes power in the second mode, and the switching device does not consume power in the first mode, further the switching loss of the bridge circuit is reduced, the operating efficiency of the driving control circuit is improved, and the load energy efficiency is improved.
The pulse driving signal includes, but is not limited to, a pulse width, a duty ratio, a switching frequency, and the like.
Furthermore, when the bridge circuit is in the working mode, the conducting state of the switching devices of the bridge circuit is determined according to the power supply signal, namely the actions of the four switching devices of the bridge circuit are controlled, and in addition, when the bridge circuit is in the working mode, the influence of electromagnetic interference is favorably reduced.
As will be understood by those skilled in the art, the supply signal includes the ac voltage and the bus voltage of the grid system input.
Optionally, the switching device is an IGBT (Insulated Gate Bipolar Transistor), a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) may be used, and a new material Semiconductor Transistor may be used, for example, a SiC type power Transistor or a GaN type power Transistor.
In addition, the driving control method according to the above embodiment of the present invention may further have the following additional technical features:
in the foregoing technical solution, preferably, determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the power supply signal and the positive half-cycle waveform and the dependency relationship between the power supply signal and the negative half-cycle waveform specifically includes: if the alternating current signal belongs to the positive half-cycle waveform, controlling the first switching device to be switched on or switched off according to a first duty ratio, and simultaneously controlling the second switching device to be switched on or switched off according to a second duty ratio; and if the alternating current signal belongs to the negative half-cycle waveform, controlling the first switching device to be switched on or switched off according to a third duty cycle, and simultaneously controlling the second switching device to be switched on or switched off according to a fourth duty cycle, wherein the first duty cycle is complementary to the second duty cycle, the third duty cycle is complementary to the fourth duty cycle, the value of the first duty cycle is configured to be a preset value or a variable value, the value of the second duty cycle is configured to be a preset value or a variable value, the value of the third duty cycle is configured to be a preset value or a variable value, and the value of the fourth duty cycle is configured to be a preset value or a variable value.
In any of the above technical solutions, preferably, the method further includes: if the alternating current signal belongs to the positive half-cycle waveform, calculating a difference value between a bus signal in the power supply signal and the given bus signal, and determining the first duty ratio according to the difference value; if the alternating current signal belongs to the negative half-cycle waveform, calculating a difference value between a bus signal in the power supply signal and the given bus signal, and determining the third duty ratio according to the difference value, wherein in the corresponding time period of the positive half-cycle waveform, the first duty ratio is changed from small to large and then changed from large to small along with the time, and in the corresponding time period of the negative half-cycle waveform, the third duty ratio is changed from large to small and then changed from small to large along with the time.
In any of the above technical solutions, preferably, determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the power supply signal and the positive half-cycle waveform and the dependency relationship between the power supply signal and the negative half-cycle waveform, further includes: if the alternating current signal belongs to the positive half-cycle waveform, controlling the third switching device to be switched off, and simultaneously controlling the fourth switching device to be switched on within the duration of the positive half-cycle waveform; and if the alternating current signal belongs to the negative half-cycle waveform, controlling the fourth switching device to be switched off, and simultaneously controlling the third switching device to be switched on within the duration of the negative half-cycle waveform.
In any one of the above technical solutions, preferably, the drive control method further includes: and controlling the third switching device and the fourth switching device to be switched off in a switching period corresponding to the zero-crossing point of the power supply signal.
In the technical scheme, the first mode and the second mode are switched at the zero crossing point of the alternating voltage, so that harmonic signals are effectively reduced, the current fluctuation phenomenon in the circuit is further reduced, the reliability and the accuracy of circuit sampling and closed-loop control are improved, in addition, the third switching device and the fourth switching device are controlled to be turned off in the switching time period corresponding to the zero crossing point of the power supply signal, namely dead time is set between the turn-on time of the third switching tube and the turn-on time of the fourth switching tube, and the reliability of the driving control circuit can be further improved.
In any of the above technical solutions, preferably, detecting a power supply signal, and determining a minimum value of a given current in the second mode according to a change rate of the power supply signal specifically includes: calculating a difference between the bus signal and the given bus signal, a rate of change of the bus signal configured to enable determination of a minimum value of the given current; inputting a difference between the bus signal and the given bus signal to a first PI controller configured to be able to output a given current in the second mode; inputting the amplitude-limited given current, the alternating-current voltage and the alternating-current to the second PI controller, wherein the second PI controller is configured to be capable of outputting the first duty ratio or the third duty ratio, and the given current is configured to control the bus signal to rise.
In the technical scheme, by calculating the difference between the bus signal and the given bus signal, the change rate of the bus signal is configured to be capable of determining the minimum value of the given current, so that the bus voltage rising rate can be effectively ensured, the occurrence of load stalling caused by bus voltage drop can be reduced, and the load energy efficiency is improved, and meanwhile, the reliability of load operation is further improved.
Specifically, the first PI controller determines the change rate according to the difference between the power supply signal and the power supply signal threshold value, so that the gain value of the given current is determined, the product of the gain value and the alternating voltage is the given current, and the given current is output to the second PI controller after being subjected to current limiting processing.
Further, the second PI controller calculates and determines a first duty ratio, a second duty ratio, a third duty ratio and a fourth duty ratio according to the given current, and similarly, dead time is set between the conduction time of the first switch tube and the conduction time of the second switch tube.
And the first PI controller and the second PI controller are proportional-integral controllers.
In any one of the above technical solutions, preferably, the drive control method further includes: if the bridge circuit works in the first mode, judging whether the power supply signal detected in real time is smaller than or equal to a first bus signal threshold value; and if the power supply signal detected in real time is judged to be less than or equal to the first bus signal threshold value, controlling the bridge circuit to switch to the second mode to work at the appointed moment of the power supply signal.
In the technical scheme, the bridge circuit works in a first mode, and the first bus signal threshold is smaller than or equal to the minimum value of the bus signal, so that if the power supply signal detected in real time is judged to be smaller than or equal to the first bus signal threshold, the bridge circuit is controlled to switch to the second mode to work at a specified time so as to enable the bus voltage to rise.
In any one of the above technical solutions, preferably, the drive control method further includes: if the bridge circuit works in the first mode, judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is judged to be larger than the first bus signal threshold value, predicting the bus signal in the next period; judging whether the bus signal in the next period is less than or equal to the first bus signal threshold value; and if the bus signal in the next period is judged to be less than or equal to the first bus signal threshold value, controlling the bridge circuit to switch to the second mode to work at the appointed moment.
In this technical solution, the bridge circuit operates in the first mode, and the first bus signal threshold is greater than or equal to the minimum bus signal threshold, so that the bus signal in the next cycle is predicted, and if it is determined that the bus signal in the next cycle is less than or equal to the first bus signal threshold, in order to avoid a bus voltage drop, the bridge circuit switches to the second mode to operate at a specified time, and optionally switches to the second mode to operate at an ac voltage zero crossing point of the next cycle, so as to reduce interference of a harmonic signal on the circuit.
In any one of the above technical solutions, preferably, the drive control method further includes: if the bridge circuit works in the second mode, judging whether the power supply signal is larger than or equal to a second bus signal threshold value; and if the power supply signal is judged to be larger than or equal to the second bus signal threshold value, controlling the bridge circuit to switch to the first mode to work at the appointed moment of the power supply signal.
In the technical scheme, the second power supply signal threshold is less than or equal to the maximum threshold of the bus signal, the bus voltage continuously rises when the bridge circuit works in the second mode, and in order to avoid breaking down a capacitive element or a switching device, the bridge circuit is controlled to be switched to the first mode at the designated time of the power supply signal, so that the load energy efficiency is further improved, and the reliability of the circuit can be further improved.
Preferably, the designated time is a zero-crossing time of the alternating voltage in the current period, such as a half-wave zero-crossing time or a full-wave zero-crossing time, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated during the switching mode of the switching device.
In any of the above technical solutions, preferably, the method further includes: if the bridge circuit works in the second mode, judging whether the bus signal detected in real time is larger than or equal to a second bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is smaller than the second bus signal threshold value, predicting the bus signal in the next period; judging the magnitude relation between the bus signal in the next period and the third bus signal threshold value; and controlling the bridge circuit to switch to the first mode to work at a specified time according to the magnitude relation between the bus signal in the next period and the third bus signal threshold value.
In the technical scheme, if the bus signal is detected to be smaller than the second bus signal threshold, the first mode does not need to be switched to the second mode immediately, the magnitude relation between the bus signal in the next period and the third bus signal threshold can be judged in a prediction mode, and the specified time for switching to the first mode in the next period is determined, so that the stability and the reliability of driving load operation are further improved, and voltage fluctuation and harmonic signals are further reduced.
Preferably, the designated time is a zero-crossing time of the alternating voltage in the next period, such as a half-wave zero-crossing time or a full-wave zero-crossing time, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated during the switching mode of the switching device.
In any one of the above technical solutions, preferably, the driving control circuit further includes a capacitive element, the capacitive element is connected between the switching device and the load, the capacitive element includes a plurality of electrolytic capacitors connected in series and/or in parallel, or the capacitive element includes a plurality of thin film capacitors connected in series and/or in parallel, and the operation control method further includes: and determining the second bus signal threshold according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching device.
In the technical scheme, the second bus signal threshold is determined according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching tube, so that on one hand, the possibility that the capacitive element and the switching tube are broken down is reduced, on the other hand, the upper limit voltage threshold determines the switching time of the switching tube between the first mode and the second mode, and the reliability and the load operation energy efficiency of the power factor correction module are further improved.
A second aspect of the present invention provides a drive control apparatus including a processor, which is capable of implementing the steps of the drive control method according to any one of the above-described embodiments when the processor executes a computer program.
Therefore, the driving control device has the beneficial technical effects described in any one of the driving control methods, and details are not repeated herein.
A third aspect of the present invention provides a home appliance comprising: a load; the drive control device according to any one of the above aspects; the driving control circuit is controlled by the driving control device and is provided with a PFC (power factor correction), and the PFC comprises at least one switching device which is configured to control a power supply signal to supply power to a load.
In any of the above technical solutions, preferably, 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.
In this technical solution, the home appliance includes the drive control device according to any one of the above technical solutions, and therefore, the home appliance includes all the beneficial effects of the drive control device according to any one of the above technical solutions, which is not described again.
A fourth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed, implements the steps of the drive control method according to any one of the preceding claims.
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 chart diagram of a drive control method of an embodiment of the present invention;
FIG. 2 shows a schematic block diagram of a drive control circuit of one embodiment of the present invention;
fig. 3 shows a timing chart of a drive control method of an embodiment of the present invention;
FIG. 4 shows a schematic diagram of a drive control scheme of one embodiment of the present invention;
fig. 5 shows a timing chart of a drive control method of an embodiment of the present invention;
fig. 6 shows a timing chart of a drive control method of another embodiment of the present invention;
fig. 7 shows a timing chart of a drive control method of 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 of the present invention and features of the embodiments 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.
The following describes an embodiment in which the switching tube of the bridgeless totem-pole PFC module operates in the first mode or the second mode with reference to the timing diagrams shown in fig. 1 to 6.
Fig. 1 shows a flow chart of a drive control method of an embodiment of the present invention.
As shown in fig. 1, according to a driving control method of an embodiment of the present invention, the driving control circuit is provided with a bridge circuit, four legs of the bridge circuit are respectively provided with a switching device, which is respectively referred to as a first switching device, a second switching device, a third switching device and a fourth switching device, a common end of the first switching device and the second switching device is connected to a live wire, a common end of the third switching device and the fourth switching device is connected to a neutral wire, a common end of the first switching device and the third switching device is connected to a high-voltage bus, a common end of the second switching device and the fourth switching device is connected to a low-voltage bus, and the bridge circuit is configured to control a power supply signal to supply power to a load, and the driving control method includes: step S102, detecting a power supply signal in real time, and controlling the bridge circuit to work in a first mode or a second mode according to the power supply signal; step S104, if the bridge circuit works in the second mode, determining that the alternating current signal in the power supply signal detected in real time belongs to a positive half-cycle waveform or a negative half-cycle waveform; and step S106, determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the alternating current signal and the positive half-cycle waveform and the dependency relationship between the alternating current signal and the negative half-cycle waveform, wherein the first mode is configured as a mode for controlling the switching device to be switched off, and the second mode is configured as a mode for operating the switching device according to a specified pulse driving signal, so that the given current in the second mode follows the alternating current voltage input to the load.
According to the driving control method provided by the invention, a circuit connected with a switching tube according to the mode is usually referred to as a totem-pole type bridge circuit for short, a pulse driving signal is stopped to be output to a switching device in a first mode, the switching device is in a cut-off mode and can be recorded as an intermittent mode, a pulse driving signal is output to the switching device in a second mode, the switching device is in a high-frequency conduction mode and can be recorded as an operating mode, the bus voltage is pulled high in the operating mode, and the capacitive element discharges to reduce the bus voltage in the intermittent mode, so that the bridge circuit is in an operating state only in a part of time, namely, the switching device only consumes power in the second mode, and the switching device does not consume power in the first mode, further the switching loss of the bridge circuit is reduced, the operating efficiency of the driving control circuit is improved, and the load energy efficiency is improved.
The pulse driving signal includes, but is not limited to, a pulse width, a duty ratio, a switching frequency, and the like.
Furthermore, when the bridge circuit is in the working mode, the conducting state of the switching devices of the bridge circuit is determined according to the power supply signal, namely the actions of the four switching devices of the bridge circuit are controlled, and in addition, when the bridge circuit is in the working mode, the influence of electromagnetic interference is favorably reduced.
As will be understood by those skilled in the art, the supply signal includes the ac voltage and the bus voltage of the grid system input.
Optionally, the switching device is an IGBT (Insulated Gate Bipolar Transistor), a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) may be used, and a new material Semiconductor Transistor may be used, for example, a SiC type power Transistor or a GaN type power Transistor.
In addition, the driving control method according to the above embodiment of the present invention may further have the following additional technical features:
in the foregoing technical solution, preferably, determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the power supply signal and the positive half-cycle waveform and the dependency relationship between the power supply signal and the negative half-cycle waveform specifically includes: if the alternating current signal belongs to the positive half-cycle waveform, controlling the first switching device to be switched on or switched off according to a first duty ratio, and simultaneously controlling the second switching device to be switched on or switched off according to a second duty ratio; and if the alternating current signal belongs to the negative half-cycle waveform, controlling the first switching device to be switched on or switched off according to a third duty cycle, and simultaneously controlling the second switching device to be switched on or switched off according to a fourth duty cycle, wherein the first duty cycle is complementary to the second duty cycle, the third duty cycle is complementary to the fourth duty cycle, the value of the first duty cycle is configured to be a preset value or a variable value, the value of the second duty cycle is configured to be a preset value or a variable value, the value of the third duty cycle is configured to be a preset value or a variable value, and the value of the fourth duty cycle is configured to be a preset value or a variable value.
In any of the above technical solutions, preferably, the method further includes: if the alternating current signal belongs to the positive half-cycle waveform, calculating a difference value between a bus signal in the power supply signal and the given bus signal, and determining the first duty ratio according to the difference value; if the alternating current signal belongs to the negative half-cycle waveform, calculating a difference value between a bus signal in the power supply signal and the given bus signal, and determining the third duty ratio according to the difference value, wherein in the corresponding time period of the positive half-cycle waveform, the first duty ratio is changed from small to large and then changed from large to small along with the time, and in the corresponding time period of the negative half-cycle waveform, the third duty ratio is changed from large to small and then changed from small to large along with the time.
In any of the above technical solutions, preferably, determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the power supply signal and the positive half-cycle waveform and the dependency relationship between the power supply signal and the negative half-cycle waveform, further includes: if the alternating current signal belongs to the positive half-cycle waveform, controlling the third switching device to be switched off, and simultaneously controlling the fourth switching device to be switched on within the duration of the positive half-cycle waveform; and if the alternating current signal belongs to the negative half-cycle waveform, controlling the fourth switching device to be switched off, and simultaneously controlling the third switching device to be switched on within the duration of the negative half-cycle waveform.
In any one of the above technical solutions, preferably, the drive control method further includes: and controlling the third switching device and the fourth switching device to be switched off in a switching period corresponding to the zero-crossing point of the power supply signal.
In the technical scheme, the first mode and the second mode are switched at the zero crossing point of the alternating voltage, so that harmonic signals are effectively reduced, the current fluctuation phenomenon in the circuit is further reduced, the reliability and the accuracy of circuit sampling and closed-loop control are improved, in addition, the third switching device and the fourth switching device are controlled to be turned off in the switching time period corresponding to the zero crossing point of the power supply signal, namely dead time is set between the turn-on time of the third switching tube and the turn-on time of the fourth switching tube, and the reliability of the driving control circuit can be further improved.
In any of the above technical solutions, preferably, detecting a power supply signal, and determining a minimum value of a given current in the second mode according to a change rate of the power supply signal specifically includes: calculating a difference between the bus signal and the given bus signal, a rate of change of the bus signal configured to enable determination of a minimum value of the given current; inputting a difference between the bus signal and the given bus signal to a first PI controller configured to be able to output a given current in the second mode; inputting the amplitude-limited given current, the alternating-current voltage and the alternating-current to the second PI controller, wherein the second PI controller is configured to be capable of outputting the first duty ratio or the third duty ratio, and the given current is configured to control the bus signal to rise.
In the technical scheme, by calculating the difference between the bus signal and the given bus signal, the change rate of the bus signal is configured to be capable of determining the minimum value of the given current, so that the bus voltage rising rate can be effectively ensured, the occurrence of load stalling caused by bus voltage drop can be reduced, and the load energy efficiency is improved, and meanwhile, the reliability of load operation is further improved.
Specifically, the first PI controller determines the change rate according to the difference between the power supply signal and the power supply signal threshold value, so that the gain value of the given current is determined, the product of the gain value and the alternating voltage is the given current, and the given current is output to the second PI controller after being subjected to current limiting processing.
Further, the second PI controller calculates and determines a first duty ratio, a second duty ratio, a third duty ratio and a fourth duty ratio according to the given current, and similarly, dead time is set between the conduction time of the first switch tube and the conduction time of the second switch tube.
And the first PI controller and the second PI controller are proportional-integral controllers.
In any one of the above technical solutions, preferably, the drive control method further includes: if the bridge circuit works in the first mode, judging whether the power supply signal detected in real time is smaller than or equal to a first bus signal threshold value; and if the power supply signal detected in real time is judged to be less than or equal to the first bus signal threshold value, controlling the bridge circuit to switch to the second mode to work at the appointed moment of the power supply signal.
In the technical scheme, the bridge circuit works in a first mode, and the first bus signal threshold is smaller than or equal to the minimum value of the bus signal, so that if the power supply signal detected in real time is judged to be smaller than or equal to the first bus signal threshold, the bridge circuit is controlled to switch to the second mode to work at a specified time so as to enable the bus voltage to rise.
In any one of the above technical solutions, preferably, the drive control method further includes: if the bridge circuit works in the first mode, judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is judged to be larger than the first bus signal threshold value, predicting the bus signal in the next period; judging whether the bus signal in the next period is less than or equal to the first bus signal threshold value; and if the bus signal in the next period is judged to be less than or equal to the first bus signal threshold value, controlling the bridge circuit to switch to the second mode to work at the appointed moment.
In this technical solution, the bridge circuit operates in the first mode, and the first bus signal threshold is greater than or equal to the minimum bus signal threshold, so that the bus signal in the next cycle is predicted, and if it is determined that the bus signal in the next cycle is less than or equal to the first bus signal threshold, in order to avoid a bus voltage drop, the bridge circuit switches to the second mode to operate at a specified time, and optionally switches to the second mode to operate at an ac voltage zero crossing point of the next cycle, so as to reduce interference of a harmonic signal on the circuit.
In any one of the above technical solutions, preferably, the drive control method further includes: if the bridge circuit works in the second mode, judging whether the power supply signal is larger than or equal to a second bus signal threshold value; and if the power supply signal is judged to be larger than or equal to the second bus signal threshold value, controlling the bridge circuit to switch to the first mode to work at the appointed moment of the power supply signal.
In the technical scheme, the second power supply signal threshold is less than or equal to the maximum threshold of the bus signal, the bus voltage continuously rises when the bridge circuit works in the second mode, and in order to avoid breaking down a capacitive element or a switching device, the bridge circuit is controlled to be switched to the first mode at the designated time of the power supply signal, so that the load energy efficiency is further improved, and the reliability of the circuit can be further improved.
Preferably, the designated time is a zero-crossing time of the alternating voltage in the current period, such as a half-wave zero-crossing time or a full-wave zero-crossing time, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated during the switching mode of the switching device.
In any of the above technical solutions, preferably, the method further includes: if the bridge circuit works in the second mode, judging whether the bus signal detected in real time is larger than or equal to a second bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is smaller than the second bus signal threshold value, predicting the bus signal in the next period; judging the magnitude relation between the bus signal in the next period and the third bus signal threshold value; and controlling the bridge circuit to switch to the first mode to work at a specified time according to the magnitude relation between the bus signal in the next period and the third bus signal threshold value.
In the technical scheme, if the bus signal is detected to be smaller than the second bus signal threshold, the first mode does not need to be switched to the second mode immediately, the magnitude relation between the bus signal in the next period and the third bus signal threshold can be judged in a prediction mode, and the specified time for switching to the first mode in the next period is determined, so that the stability and the reliability of driving load operation are further improved, and voltage fluctuation and harmonic signals are further reduced.
Preferably, the designated time is a zero-crossing time of the alternating voltage in the next period, such as a half-wave zero-crossing time or a full-wave zero-crossing time, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated during the switching mode of the switching device.
In any one of the above technical solutions, preferably, the driving control circuit further includes a capacitive element, the capacitive element is connected between the switching device and the load, the capacitive element includes a plurality of electrolytic capacitors connected in series and/or in parallel, or the capacitive element includes a plurality of thin film capacitors connected in series and/or in parallel, and the operation control method further includes: and determining the second bus signal threshold according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching device.
In the technical scheme, the second bus signal threshold is determined according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching tube, so that on one hand, the possibility that the capacitive element and the switching tube are broken down is reduced, on the other hand, the upper limit voltage threshold determines the switching time of the switching tube between the first mode and the second mode, and the reliability and the load operation energy efficiency of the power factor correction module are further improved.
Fig. 2 shows a schematic block diagram of a drive control circuit of an embodiment of the present invention.
As shown in fig. 2, according to a driving control circuit of another embodiment of the present invention, the driving control circuit is connected between the grid system AC and the input end of the load, and specifically includes: the bridgeless totem-pole PFC module comprises an inductive element L, a switching tube and a one-way conduction device D, wherein the voltage on the capacitive element C presents sawtooth wave waves due to the charging and discharging action of the capacitive element C, and the one-way conduction device D is combined with the conduction characteristic of the one-way conduction device D, so that the one-way conduction device D is conducted due to forward bias only when the instantaneous value of the AC line voltage is higher than the voltage on the capacitive element, namely the one-way conduction device D is conducted near the peak value in each period of the AC line input signal, the input AC voltage presents sine wave shape, but the input AC current has a large number of spike pulses, namely harmonic components causing the power factor of the circuit to be low.
Therefore, the bridgeless totem-pole PFC module can solve the problem that phase difference exists between alternating-current voltage and alternating-current and the problems of electromagnetic interference and electromagnetic compatibility caused by harmonic signals, and in the embodiment, the switch tube comprises the first switch tube Q1A second switch tube Q2And a third switching tube Q3And a fourth switching tube Q4Wherein, the first switch tube Q1And a second switching tube Q2Is a high-frequency switch tube, a third switch tube Q3And a fourth switching tube Q4Is a low-frequency switching tube.
As shown in fig. 3, for the purpose of further improving the energy efficiency of the load operation, for the active bridgeless totem-pole PFC module, the operating mode of the switching tube is adjusted according to the operating parameters of the load, and particularly, when it is detected that the amount of power required for driving the load to operate is low, whether the switching tube operates is controlled according to a power supply signal, where the power supply signal includes an AC voltage of the AC input of the power grid system and a bus voltage.
Further, if it is determined that the switching tube operates in the second mode, the bus voltage V is further combineddcMaximum threshold value V of bus signaldc_maxThe magnitude relation between them, and the bus voltage VdcMinimum threshold V of bus signaldc_minThe magnitude relation between the pulse signals and the pulse signals to control the output of pulse drive signals to the switching tube or stop outputting pulse drive to the switching tubeA signal.
Specifically, if the bus voltage VdcIf the bus voltage exceeds the upper limit voltage threshold, the pulse driving signal output to the switching tube is stopped, namely the switching tube is switched to the first mode to work, namely the switching tube is in an intermittent state, and if the bus voltage is lower than the minimum threshold V of the bus signaldc_minThen, a pulse driving signal is output to the switch tube, i.e. the switch tube is switched to a second mode to work, i.e. the switch tube is in a working state, so that a given current I is causedSClose to a sine wave waveform.
Still further, the switching time between the first mode and the second mode is the alternating current signal USTo further reduce spikes in the drive control circuit.
As shown in fig. 4, in the drive control scheme of the present embodiment, the steps performed by the PI controller include:
(1) the first PI controller is used for controlling the first PI controller according to the bus signal VdcAnd bus signal threshold VdcrefThe difference between them determines the rate of change and thus the gain value I for a given currentref_dcGain value and AC voltage VacThe product of (the absolute value of the ac voltage shown in fig. 4) is a given current, and the given current is subjected to current limiting processing and then output to the second PI controller.
(2) The second PI controller is used for controlling the current I according to the given current and the alternating currentacAnd calculating and determining a pulse driving signal, wherein the pulse driving signal comprises a first duty ratio, a second duty ratio, a third duty ratio and a fourth duty ratio, similarly, a dead time is set between the conduction time of the first switch tube and the conduction time between the second switch tubes, and in addition, the pulse driving signal also comprises the switching frequency of the switch tubes.
And the first PI controller and the second PI controller are proportional-integral controllers.
Fig. 5 is a timing chart illustrating an operation control method according to another embodiment of the present invention.
As shown in fig. 5, an AC voltage U is input to a load in a grid system ACSIn the process of (1), at T0～T3In time interval, it is recorded as AC voltage USPositive half cycle waveform ofThe controller controls the first switch tube Q1And a second switching tube Q2A first switch tube Q for outputting pulse drive signal1The duty ratio of (1) is a variable value (increased from small to large or decreased from large to small) or a preset constant value, and the first switch tube Q1On-time of and the second switching tube Q2The conduction time of the third switching tube Q is complementary3On and the fourth switch tube Q4And (6) cutting off.
At T3～T6In time interval, it is recorded as AC voltage USThe controller to the first switch tube Q1And a second switching tube Q2A first switch tube Q for outputting pulse drive signal1The duty ratio of (1) is a variable value (increased from small to large or decreased from large to small) or a preset constant value, and the first switch tube Q1On-time of and the second switching tube Q2The conduction time of the third switching tube Q is complementary3Cut off and the fourth switch tube Q4And conducting.
Specifically, as shown in fig. 6, a first switching tube Q is provided1Voltage variation and second switching tube Q2The voltage of (2) is changed.
As shown in FIG. 7, T corresponding to a full wave zero crossing is determined based on the sampled value of the bus voltage12At the moment, the first mode is switched to the second mode according to the bus signal VdcPredicting and sampling the bus signal according to the time-varying rule, and optionally predicting a first bus voltage predicted value V corresponding to a first half-wave zero crossing point after entering a second modedc_pre1Comparing the predicted value V of the first bus voltagedc_pre1Maximum threshold value V of bus signaldc_maxIf the first bus voltage predicted value V is determineddc_pre1Less than maximum threshold V of bus signaldc_maxContinuing to maintain the second mode operation and according to the bus signal sampling value V of the next full wave zero crossing pointdc_curPredicting a first bus voltage prediction value Vdc_pre2Comparing the predicted value V of the second bus voltagedc_pre2Maximum threshold value V of bus signaldc_maxIf the second bus voltage predicted value V is determineddc_pre2Proximity busMaximum threshold V of signaldc_maxI.e. maximum threshold value V of the bus signaldc_maxAnd a second bus voltage predicted value Vdc_pre2The difference value between the two full-wave zero-crossing points is smaller than the difference value threshold value, the corresponding time T of the other full-wave zero-crossing point is determined21Switching to the first mode.
A home appliance according to an embodiment of the present invention includes: a load; the drive control apparatus according to any one of the above; the driving control circuit is controlled by the driving control device and is provided with a PFC (power factor correction), and the PFC comprises at least one switching device which is configured to control a power supply signal to supply power to a load.
In this technical solution, the home appliance includes the driving control device described in any of the embodiments, so that the home appliance includes all the beneficial effects of the driving control device described in any of the embodiments, which are not described 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.
In this embodiment, the power supply signal is controlled by setting the switch tube to supply power to the load, so long as the bus voltage is within the normal variation range, normal operation of the load can be ensured, on the premise that normal operation of the load can be ensured, a control strategy of a burst (intermittent oscillation) mode can be set for variation of the bus voltage, that is, an intermittent output control strategy, so as to control the high-frequency action signal to be in an intermittent output state through the intermittent output control strategy, that is, the high-frequency action signal is not required to be continuously in the output state, that is, the switch tube is not required to be continuously in the high-frequency action on-off state, so that the conduction power consumption of the power factor correction module in the drive control circuit can be reduced, and the energy efficiency of an electrical apparatus (such as an air conditioner) adopting the.
Alternatively, the controller may be one of an MCU (Micro-programmed Control Unit), a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and an embedded device, but is not limited thereto.
A computer-readable storage medium according to an embodiment of the present invention, has a computer program stored thereon, which, when executed, implements the steps of the drive control method according to any one of the above-described technical solutions.
According to the technical scheme, a circuit connected with a switching tube in the mode is usually referred to as a totem-pole type bridge circuit for short, a pulse driving signal is stopped to be output to a switching device in a first mode, the switching device is in a cut-off mode and can be recorded as an intermittent mode, a pulse driving signal is output to the switching device in a second mode, the switching device is in a high-frequency conduction mode and can be recorded as an operating mode, the bus voltage is pulled high in the operating mode, capacitive elements are discharged in the intermittent mode to reduce the bus voltage, so that the bridge circuit is in an operating state only in a part of time, namely, the switching device only consumes power in the second mode, and the switching device does not consume power in the first mode, further the switching loss of the bridge circuit is reduced, the operating efficiency of a driving control circuit is improved, and the load energy efficiency is improved.
In the description herein, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly stated or limited otherwise; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (15)

1. A drive control method is suitable for a drive control circuit, the drive control circuit is provided with a bridge circuit, four bridge arms of the bridge circuit are respectively provided with a switch device and respectively marked as a first switch device, a second switch device, a third switch device and a fourth switch device, the common ends of the first switch device and the second switch device are connected to a live wire, the common ends of the third switch device and the fourth switch device are connected to a zero wire, the common ends of the first switch device and the third switch device are connected to a high-voltage bus, the common ends of the second switch device and the fourth switch device are connected to a low-voltage bus, and the bridge circuit is configured to control a power supply signal to supply power to a load, and the drive control method comprises the following steps:
detecting a power supply signal in real time, and controlling the bridge circuit to work in a first mode or a second mode according to the power supply signal;
if the bridge circuit works in the second mode, determining that the alternating current signal in the power supply signal detected in real time belongs to a positive half-cycle waveform or a negative half-cycle waveform;
determining a conduction period of a switching device of the bridge circuit according to a dependency relationship between the alternating current signal and the positive half-cycle waveform and a dependency relationship between the alternating current signal and the negative half-cycle waveform,
wherein the first mode is configured as a mode in which the switching device is controlled to be turned off, and the second mode is configured as a mode in which the switching device operates in accordance with a prescribed pulse drive signal so that a given current in the second mode follows an alternating-current voltage input to the load.
2. The driving control method according to claim 1, wherein determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the supply signal and the positive half-cycle waveform and the dependency relationship between the supply signal and the negative half-cycle waveform comprises:
if the alternating current signal belongs to the positive half-cycle waveform, controlling the first switching device to be switched on or switched off according to a first duty ratio, and simultaneously controlling the second switching device to be switched on or switched off according to a second duty ratio;
if the alternating current signal belongs to the negative half-cycle waveform, controlling the first switching device to be switched on or switched off according to a third duty ratio, and simultaneously controlling the second switching device to be switched on or switched off according to a fourth duty ratio,
wherein the first duty cycle is complementary to the second duty cycle, the third duty cycle is complementary to the fourth duty cycle, the value of the first duty cycle is configured to be a preset value or a variable value, the value of the second duty cycle is configured to be a preset value or a variable value, the value of the third duty cycle is configured to be a preset value or a variable value, and the value of the fourth duty cycle is configured to be a preset value or a variable value.
3. The drive control method according to claim 1, characterized by further comprising:
if the alternating current signal belongs to the positive half-cycle waveform, calculating a difference value between a bus signal in the power supply signal and the given bus signal, and determining the first duty ratio according to the difference value;
if the alternating current signal belongs to the negative half-cycle waveform, calculating a difference value between a bus signal in the power supply signal and the given bus signal, determining the third duty ratio according to the difference value,
wherein, in the corresponding time interval of the positive half-cycle waveform, the first duty ratio is changed from small to big and then from big to small along with the time,
and in the corresponding time period of the negative half-cycle waveform, the third duty ratio is changed from large to small and then from small to large along with the time.
4. The driving control method according to claim 1, wherein the determining the conduction period of the switching device of the bridge circuit according to the dependency relationship between the supply signal and the positive half-cycle waveform and the dependency relationship between the supply signal and the negative half-cycle waveform further comprises:
if the alternating current signal belongs to the positive half-cycle waveform, controlling the third switching device to be switched off, and simultaneously controlling the fourth switching device to be switched on within the duration of the positive half-cycle waveform;
and if the alternating current signal belongs to the negative half-cycle waveform, controlling the fourth switching device to be switched off, and simultaneously controlling the third switching device to be switched on within the duration of the negative half-cycle waveform.
5. The drive control method according to any one of claims 1 to 4, characterized by further comprising:
and controlling the third switching device and the fourth switching device to be switched off in a switching period corresponding to the zero-crossing point of the power supply signal.
6. The drive control method according to any one of claims 1 to 4, wherein detecting a supply signal and determining a minimum value of the given current in the second mode according to a rate of change of the supply signal, specifically comprises:
calculating a difference between the bus signal and the given bus signal, a rate of change of the bus signal configured to enable determination of a minimum value of the given current;
inputting a difference between the bus signal and the given bus signal to a first PI controller configured to be able to output a given current in the second mode;
inputting the amplitude-limited given current, the alternating voltage, and the alternating current to the second PI controller configured to be able to output the first duty ratio or the third duty ratio,
wherein the given current is configured to control the bus signal to rise.
7. The drive control method according to any one of claims 1 to 4, characterized by further comprising:
if the bridge circuit works in the first mode, judging whether the power supply signal detected in real time is smaller than or equal to a first bus signal threshold value;
and if the power supply signal detected in real time is judged to be less than or equal to the first bus signal threshold value, controlling the bridge circuit to switch to the second mode to work at the appointed moment of the power supply signal.
8. The drive control method according to any one of claims 1 to 4, characterized by further comprising:
if the bridge circuit works in the first mode, judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value in the power supply signal threshold values;
if the bus signal detected in real time is judged to be larger than the first bus signal threshold value, predicting the bus signal in the next period;
judging whether the bus signal in the next period is less than or equal to the first bus signal threshold value;
and if the bus signal in the next period is judged to be less than or equal to the first bus signal threshold value, controlling the bridge circuit to switch to the second mode to work at the appointed moment.
9. The drive control method according to any one of claims 1 to 4, characterized by further comprising:
if the bridge circuit works in the second mode, judging whether the power supply signal is larger than or equal to a second bus signal threshold value;
and if the power supply signal is judged to be larger than or equal to the second bus signal threshold value, controlling the bridge circuit to switch to the first mode to work at the appointed moment of the power supply signal.
10. The drive control method according to any one of claims 1 to 4, characterized by further comprising:
if the bridge circuit works in the second mode, judging whether the bus signal detected in real time is larger than or equal to a second bus signal threshold value in the power supply signal threshold values;
if the bus signal detected in real time is smaller than the second bus signal threshold value, predicting the bus signal in the next period;
judging the magnitude relation between the bus signal in the next period and the third bus signal threshold value;
and controlling the bridge circuit to switch to the first mode to work at a specified time according to the magnitude relation between the bus signal in the next period and the third bus signal threshold value.
11. The drive control method according to any one of claims 1 to 4,
the driving control circuit further comprises a capacitive element, the capacitive element is connected between the switching device and the load, the capacitive element comprises a plurality of electrolytic capacitors connected in series and/or in parallel, or the capacitive element comprises a plurality of thin film capacitors connected in series and/or in parallel,
the operation control method further includes:
and determining the second bus signal threshold according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching device.
12. A drive control apparatus comprising a processor, wherein the processor when executing a computer program implements:
the steps of the drive control method according to any one of claims 1 to 11.
13. An appliance, comprising:
a load;
the drive control apparatus according to claim 12;
the driving control circuit is controlled by the driving control device and is provided with a PFC (power factor correction), and the PFC comprises at least one switching device which is configured to control a power supply signal to supply power to a load.
14. The home device of claim 13,
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.
15. 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 drive control method according to any one of claims 1 to 11.
CN201910472244.2A 2019-05-31 2019-05-31 Drive control method, device, household appliance and computer readable storage medium Pending CN112019019A (en)

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CN108649787A (en) * 2018-06-14 2018-10-12 广东美的制冷设备有限公司 Driving circuit, power factor correction controller and driving method

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Publication number Priority date Publication date Assignee Title
CN113765409A (en) * 2021-09-29 2021-12-07 厦门市必易微电子技术有限公司 Control method and power regulation method for direct alternating current-alternating current conversion circuit
CN113765409B (en) * 2021-09-29 2023-12-19 厦门市必易微电子技术有限公司 Control method and power regulation method for direct alternating current-alternating current conversion circuit
CN114285261A (en) * 2021-12-29 2022-04-05 阳光电源股份有限公司 Vehicle-mounted charger and current distortion suppression method of PFC circuit
CN114285261B (en) * 2021-12-29 2023-10-31 阳光电源股份有限公司 Current distortion suppression method for vehicle-mounted charger and PFC circuit

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