CN111490689B - Control method for reducing standby power consumption, switching power supply, equipment and storage medium - Google Patents
Control method for reducing standby power consumption, switching power supply, equipment and storage medium Download PDFInfo
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- CN111490689B CN111490689B CN201910079164.0A CN201910079164A CN111490689B CN 111490689 B CN111490689 B CN 111490689B CN 201910079164 A CN201910079164 A CN 201910079164A CN 111490689 B CN111490689 B CN 111490689B
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
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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
- H02M1/14—Arrangements for reducing ripples from dc input or output
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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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a switching power supply, which comprises a rectifier bridge, a filter capacitor connected with the rectifier bridge, an electronic switch connected in series with a charging loop of the filter capacitor, and a controller connected with the electronic switch, wherein the controller is used for: determining that the electronic equipment is in a standby state, monitoring rectified voltage, determining that the voltage reaches a preset charging voltage value, controlling the electronic switch to be switched on so as to charge the filter capacitor, determining that the voltage reaches a preset discharging voltage value, and controlling the electronic switch to be switched off so as to discharge the filter capacitor. The invention also discloses a control method for reducing the standby power consumption of the switching power supply, electronic equipment and a computer readable storage medium. The invention can effectively reduce the standby power consumption of the switching power supply.
Description
Technical Field
The invention relates to the technical field of switching power supplies, in particular to a switching power supply, a control method for reducing standby power consumption of the switching power supply, electronic equipment and a computer readable storage medium.
Background
At present, the most strict requirement of a european area on the standby power consumption of household appliances is less than 500mW, and in order to meet the increasingly severe requirement on the standby power consumption of household appliances, an auxiliary power supply circuit is generally added to reduce the power consumption of a power supply chip when the standby power consumption of a household appliance switching power supply is reduced in the existing scheme; or the peripheral circuit of the power supply chip is reduced so as to reduce the power consumption of the peripheral circuit. However, in these schemes, the leakage loss of the input filter capacitor of the switching power supply and the loss of the internal high voltage source of the power supply chip are not reduced from the circuit, and this part of power consumption is the main part of the standby power consumption of the switching power supply when the mains supply input is 220V, 230V or 240V, so the existing scheme does not achieve the purpose of effectively reducing the standby power consumption of the switching power supply.
Disclosure of Invention
The invention mainly aims to provide a switching power supply, a control method for reducing the standby power consumption of the switching power supply, an electronic device and a computer readable storage medium, and aims to effectively reduce the standby power consumption of the switching power supply.
In order to achieve the above object, the present invention provides a switching power supply, which includes a rectifier bridge, a filter capacitor connected to the rectifier bridge, an electronic switch connected in series to a charging loop of the filter capacitor, and a controller connected to the electronic switch, wherein the controller is configured to:
determining that the electronic equipment is in a standby state, monitoring rectified voltage, determining that the voltage reaches a preset charging voltage value, controlling the electronic switch to be switched on so as to charge the filter capacitor, determining that the voltage reaches a preset discharging voltage value, and controlling the electronic switch to be switched off so as to discharge the filter capacitor.
Preferably, the preset charging voltage value includes a first charging voltage value in a voltage rising phase and a second charging voltage value in a voltage falling phase in a half-wave cycle, and the first charging voltage value is smaller than the second charging voltage value.
Preferably, a time when the voltage reaches the preset discharge voltage value from the first charge voltage value is equal to a time when the voltage reaches the preset discharge voltage value from the second charge voltage value.
Preferably, the switching power supply further includes a positive bus connected to the positive output terminal of the input power supply, and a negative bus connected to the negative output terminal of the input power supply, the positive bus is connected to the rectifier bridge and the electronic switch, and the negative bus is connected to the rectifier bridge and the filter capacitor.
Preferably, the switching power supply further includes a power supply chip connected to the filter capacitor.
In order to achieve the above object, the present invention further provides a control method for reducing the standby power consumption of a switching power supply, where the control method for reducing the standby power consumption of the switching power supply includes the following steps:
acquiring the current state of the electronic equipment;
determining that the electronic equipment is in a standby state, and monitoring rectified voltage;
determining that the voltage reaches a preset charging voltage value, and controlling an electronic switch of the switching power supply to be switched on so as to charge a filter capacitor of the switching power supply;
and determining that the voltage reaches a preset discharge voltage value, and controlling the electronic switch to be switched off so as to discharge the filter capacitor.
Preferably, before the step of determining that the voltage reaches a preset charging voltage value and controlling an electronic switch of the switching power supply to be turned on, the method further includes:
reducing the output voltage value of an input power supply by volts, and monitoring the output voltage value of the switching power supply;
determining that the monitored output voltage value of the switching power supply reaches a preset voltage value, and stopping reducing the output voltage value of the input power supply;
and increasing the output voltage value of the input power supply by a preset voltage value to be used as the preset charging voltage value.
Preferably, before the step of determining that the voltage reaches a preset discharge voltage value and controlling the electronic switch to be turned off to discharge the filter capacitor, the method further includes:
determining to obtain the preset charging voltage value, and acquiring the current output current value of the input power supply;
acquiring the capacitance value of the filter capacitor and the period of the input power supply;
and calculating to obtain the preset discharge voltage value according to the preset charge voltage value, the output current value of the input power supply, the capacitance value and the period of the input power supply.
Preferably, the input power supply is a direct current power supply.
Preferably, the step of calculating the preset discharging voltage value according to the preset charging voltage value, the output current value of the input power supply, the capacitance value and the period of the input power supply includes:
obtaining the product of the preset charging voltage value, the output current value of the input power supply and the period of the input power supply;
calculating a quotient between the product and the capacitance value;
and taking a sum value between the quotient value and the square of the preset charging voltage value, and taking the sum value as a root to obtain the preset discharging voltage value.
Preferably, the step of acquiring the current state of the electronic device further includes:
and determining that the electronic equipment is in a non-standby state, and controlling the electronic switch to keep a conducting state.
In order to achieve the above object, the present invention further provides a switching power supply, which includes a processor and a control program stored in the processor and operable on the processor for reducing the standby power consumption of the switching power supply, wherein the control program for reducing the standby power consumption of the switching power supply is executed by the processor to implement the steps of the control method for reducing the standby power consumption of the switching power supply.
To achieve the above object, the present invention further provides an electronic device including the switching power supply as described above.
In order to achieve the above object, the present invention further provides a computer readable storage medium, wherein a control program for reducing the standby power consumption of the switching power supply is stored on the computer readable storage medium, and the control program is executed by a processor to implement the steps of the control method for reducing the standby power consumption of the switching power supply.
According to the switching power supply, the control method for reducing the standby power consumption of the switching power supply, the electronic equipment and the computer readable storage medium, the rectifier bridge, the filter capacitor connected with the rectifier bridge, the electronic switch connected in series with the charging loop of the filter capacitor and the controller connected with the electronic switch are arranged, the controller is used for obtaining the current state of the electronic equipment, then determining that the electronic equipment is in the standby state, monitoring the rectified voltage, determining that the voltage reaches a preset charging voltage value, controlling the electronic switch to be conducted so as to charge the filter capacitor, then determining that the voltage reaches a preset discharging voltage value, and controlling the electronic switch to be disconnected so as to discharge the filter capacitor. Therefore, when the electronic equipment is in a standby state, the voltage of the filter capacitor can be maintained in a low-voltage state on the premise of maintaining the necessary output power of the switching power supply, and the standby power consumption of the switching power supply is effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of a switching power supply in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a switching power supply according to the present invention;
FIG. 3 is a rectified waveform of the present invention;
FIG. 4 is a flowchart illustrating a first embodiment of a control method for reducing standby power consumption of a switching power supply according to the present invention;
FIG. 5 is a flowchart illustrating a second embodiment of a control method for reducing standby power consumption of a switching power supply according to the present invention;
FIG. 6 is a flowchart illustrating a control method for reducing standby power consumption of a switching power supply according to a third embodiment of the present invention;
fig. 7 is a detailed flowchart of step S10 in fig. 6 according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the switching power supply of the present invention includes: a processor 1001, such as a CPU, a user interface 1002, a memory 1003, and a communication bus 1004. Wherein a communication bus 1004 is used to enable connective communication between these components. The user interface 1002 may include a Display screen (Display), an input unit. The memory 1003 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1003 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the switching power supply configuration shown in fig. 1 does not constitute a limitation of the switching power supply, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, the memory 1003, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a control program for reducing standby power consumption of the switching power supply.
In the switching power supply shown in fig. 1, the user interface 1002 is mainly used for receiving a user instruction triggered by a user touching the display screen or inputting an instruction on the input unit; the processor 1001 is configured to call a control program stored in the memory 1003 for reducing the standby power consumption of the switching power supply, and perform the following operations:
acquiring the current state of the electronic equipment;
determining that the electronic equipment is in a standby state, and monitoring rectified voltage;
determining that the voltage reaches a preset charging voltage value, and controlling an electronic switch of the switching power supply to be switched on so as to charge a filter capacitor of the switching power supply;
and determining that the voltage reaches a preset discharge voltage value, and controlling the electronic switch to be switched off so as to discharge the filter capacitor.
Further, the processor 1001 may call a control program stored in the memory 1003 for reducing the standby power consumption of the switching power supply, and further perform the following operations:
reducing the output voltage value of an input power supply by volts, and monitoring the output voltage value of the switching power supply;
determining that the monitored output voltage value of the switching power supply reaches a preset voltage value, and stopping reducing the output voltage value of the input power supply;
and increasing the output voltage value of the input power supply by a preset voltage value to be used as the preset charging voltage value.
Further, the processor 1001 may call a control program stored in the memory 1003 for reducing the standby power consumption of the switching power supply, and further perform the following operations:
determining to obtain the preset charging voltage value, and acquiring the current output current value of the input power supply;
acquiring the capacitance value of the filter capacitor and the period of the input power supply;
and calculating to obtain the preset discharge voltage value according to the preset charge voltage value, the output current value of the input power supply, the capacitance value and the period of the input power supply.
Further, the processor 1001 may call a control program stored in the memory 1003 for reducing the standby power consumption of the switching power supply, and further perform the following operations:
obtaining the product of the preset charging voltage value, the output current value of the input power supply and the period of the input power supply;
calculating a quotient between the product and the capacitance value;
and taking a sum value between the quotient value and the square of the preset charging voltage value, and taking the sum value as a root to obtain the preset discharging voltage value.
Further, the processor 1001 may call a control program stored in the memory 1003 for reducing the standby power consumption of the switching power supply, and further perform the following operations:
and determining that the electronic equipment is in a non-standby state, and controlling the electronic switch to keep a conducting state.
Referring to fig. 2, the present invention provides a switching power supply 100, which includes a rectifier bridge 2 connected to an input power supply 1, a filter capacitor 3 connected to the rectifier bridge 2, an electronic switch 4 connected in series to a charging circuit of the filter capacitor 3, a controller 5 connected to the electronic switch 4, and a power chip 6 connected to the filter capacitor 3. The switching power supply 100 further comprises a positive bus 7 connected with the positive output end of the input power supply 1 and a negative bus 8 connected with the negative output end of the input power supply 1, the positive bus 7 is respectively connected with the rectifier bridge 2, the electronic switch 4 and the controller 5, and the negative bus 8 is respectively connected with the rectifier bridge 2 and the filter capacitor 3. It is understood that the switching power supply 100 may further include a monitoring unit (not shown in the figure) for monitoring the current state of the electronic device, such as by monitoring a voltage or a current signal to determine whether the electronic device is in a standby state.
Wherein the controller 5 is configured to:
when the electronic equipment is in a standby state, the rectified voltage is monitored, the electronic switch 4 is controlled to be switched on when the voltage reaches a preset charging voltage value, so that the filter capacitor 3 is charged, and the electronic switch 4 is controlled to be switched off when the voltage reaches a preset discharging voltage value, so that the filter capacitor 3 is discharged.
In this embodiment, the electronic device may be a household appliance such as an air conditioner, a television, a washing machine, an electric cooker, a water purifier, or may be a notebook adapter. The current state of the electronic device includes a standby state, a shutdown state, an operating state, and the like, and the current state of the electronic device may be monitored in real time or at regular time by the switching power supply 100. Specifically, whether the electronic device is currently in a standby state may be determined by monitoring signals such as voltage or current.
In this embodiment, when it is monitored that the electronic device is in a standby state, the voltage value rectified by the rectifier bridge 2 is monitored. The input alternating current can be converted into direct current after being rectified by the rectifier bridge 2. And when the electronic equipment is monitored to be in a non-standby state such as an operation state, controlling the electronic switch 4 to keep a conducting state.
In this embodiment, when the electronic device is in a standby state, the switching power supply 100 needs to output a certain necessary power, and therefore, a minimum charging start voltage and a minimum charging end voltage of the filter capacitor 3 need to be obtained through a preset algorithm or an experimental test.
Specifically, the preset charging voltage value is the minimum charging starting voltage of the filter capacitor 3, and the value may be calculated according to a preset algorithm or obtained through an experimental test. And when the rectified voltage reaches the preset charging voltage value, controlling the electronic switch 4 to be switched on so as to charge the filter capacitor 3.
In this embodiment, the preset discharging voltage value is the minimum charging end voltage of the filter capacitor 3. The value can be calculated according to a preset algorithm or can be obtained through experimental tests. And when the voltage is monitored to reach a preset discharge voltage value, controlling the electronic switch 4 to be switched off so as to discharge the filter capacitor 3.
Therefore, when the electronic device is in a standby state, the voltage of the filter capacitor 3 can be maintained in a low-voltage state on the premise of maintaining the necessary output power of the switching power supply 100, and therefore, the voltage of the bus can be maintained at the lowest voltage level, the loss of the filter capacitor 3, a power supply chip and the like can be further reduced, and the loss of other circuits connected to the bus can be reduced, so that the standby power consumption of the switching power supply 100 can be effectively reduced.
Further, as shown in fig. 3, the preset charging voltage value U may include a first charging voltage value U1And a second charging voltage value U2The preset discharge voltage value is U0The first charging voltage value U1Is less than the second charging voltage value U2. That is, in a half-wave period, the filter capacitor 3 may perform two charging and discharging processes: for the first time, when the voltage rises to reach the first charging voltage value U1Starting charging when the voltage continuously rises to a preset discharge voltage value U0Then the discharge is started; secondly, when the voltage is reduced to a second charging voltage value U2Starting charging when the voltage continuously drops to the preset discharge voltage value U0Discharge is started.
It is understood that the manner of controlling the charging and discharging of the filter capacitor 3 by the electronic switch 4 may be the first charging and discharging method, the second charging and discharging method, or the two charging and discharging methods. Preferably, the above-mentioned two-time charging and discharging method may be adopted, and thus, the electronic switch 4 may be allowed to have a slightly larger control margin with respect to a single charging and discharging operation at the above-mentioned preset charging voltage value or preset discharging voltage value, thereby enhancing reliability.
The time for the voltage to reach the preset discharge voltage value from the first charge voltage value is equal to the time for the voltage to reach the preset discharge voltage value from the second charge voltage value. In this way, the average voltage value is made the same, so that the standby power consumption reduced twice is made the same. The remaining time obtained by subtracting this time from each half-wave period is the discharge time of the filter capacitor 3, and this time is the time for maintaining the circuit power supply by the energy of the filter capacitor 3.
According to the switching power supply 100 provided by the invention, by arranging the rectifier bridge 2, the filter capacitor 3 connected with the rectifier bridge 2, the electronic switch 4 connected in series with the charging loop of the filter capacitor 3 and the controller 5 connected with the electronic switch 4, the controller 5 is used for firstly acquiring the current state of the electronic equipment, then monitoring the rectified voltage when the electronic equipment is in a standby state, controlling the electronic switch 4 to be switched on when the voltage reaches a preset charging voltage value so as to charge the filter capacitor 3, and then controlling the electronic switch 4 to be switched off when the voltage reaches a preset discharging voltage value so as to discharge the filter capacitor 3. Therefore, when the electronic device is in a standby state, the voltage of the filter capacitor 3 can be maintained in a low-voltage state on the premise of maintaining the necessary output power of the switching power supply 100, so that the standby power consumption of the switching power supply 100 can be effectively reduced.
Referring to fig. 4, in a first embodiment, the present invention provides a control method for reducing standby power consumption of a switching power supply, including the following steps:
step S1, acquiring the current state of the electronic equipment;
in this embodiment, the electronic device may be a household appliance such as an air conditioner, a television, a washing machine, an electric cooker, a water purifier, or may be a notebook adapter. The current state of the electronic equipment comprises a standby state, a shutdown state, an operating state and the like, and can be monitored in real time or at regular time through a switching power supply. Specifically, whether the electronic device is currently in a standby state may be determined by monitoring signals such as voltage or current.
Step S2, determining that the electronic equipment is in a standby state, and monitoring rectified voltage;
in this embodiment, when it is monitored that the electronic device is in a standby state, a voltage value rectified by the rectifier bridge is monitored. The input alternating current can be converted into direct current after being rectified by the rectifier bridge. And when the electronic equipment is monitored to be in a non-standby state such as an operating state, controlling the electronic switch to keep a conducting state.
Step S3, determining that the voltage reaches a preset charging voltage value, and controlling an electronic switch of the switching power supply to be switched on so as to charge a filter capacitor of the switching power supply;
in this embodiment, when the electronic device is in a standby state, the switching power supply needs to output a certain necessary power, and therefore, a minimum charging start voltage and a minimum charging end voltage of the filter capacitor need to be obtained through a preset algorithm or an experimental test.
Specifically, the preset charging voltage value is the minimum charging starting voltage of the filter capacitor, and the value can be calculated according to a preset algorithm or obtained through an experimental test. And when the rectified voltage reaches the preset charging voltage value, controlling the electronic switch to be switched on so as to charge the filter capacitor.
And step S4, determining that the voltage reaches a preset discharge voltage value, and controlling the electronic switch to be switched off so as to discharge the filter capacitor.
In this embodiment, the preset discharging voltage value is a minimum charging end voltage of the filter capacitor. The value can be calculated according to a preset algorithm or can be obtained through experimental tests. And when the voltage is monitored to reach a preset discharge voltage value, controlling the electronic switch to be switched off so as to discharge the filter capacitor.
Therefore, when the electronic equipment is in a standby state, the voltage of the filter capacitor can be maintained in a low-voltage state on the premise of maintaining the necessary output power of the switching power supply, and the voltage of the bus can be maintained at the lowest voltage level, so that the loss of the filter capacitor, a power supply chip and the like is reduced, and the loss of other circuits connected to the bus is reduced, and the standby power consumption of the switching power supply can be effectively reduced.
Further, as shown in fig. 3, the preset charging voltage value may include a first chargingVoltage value U1And a second charging voltage value U2The preset discharge voltage value is U0The first charging voltage value U1Is less than the second charging voltage value U2. That is, in one period, the filter capacitor can be charged and discharged twice: for the first time, when the voltage rises to reach the first charging voltage value U1Starting charging when the voltage continuously rises to a preset discharge voltage value U0Then the discharge is started; secondly, when the voltage is reduced to a second charging voltage value U2Starting charging when the voltage continuously drops to the preset discharge voltage value U0Discharge is started.
It is understood that, the manner of controlling the charging and discharging of the filter capacitor by the electronic switch may adopt only the first charging and discharging method, may adopt only the second charging and discharging method, and may adopt the two charging and discharging methods at the same time. Preferably, the above-mentioned two-time charging and discharging method may be adopted, and thus, the electronic switch may be allowed to have a slightly larger control margin at the above-mentioned preset charging voltage value or preset discharging voltage value with respect to a single charging and discharging operation, thereby enhancing reliability.
The time for the voltage to reach the preset discharge voltage value from the first charge voltage value is equal to the time for the voltage to reach the preset discharge voltage value from the second charge voltage value. The remaining time obtained by subtracting the time from each period is the discharge time of the filter capacitor, and the time maintains the circuit power supply by the energy of the filter capacitor.
The control method for reducing the standby power consumption of the switching power supply comprises the steps of firstly obtaining the current state of the electronic equipment, then monitoring the rectified voltage when the electronic equipment is in the standby state, controlling the electronic switch to be switched on when the voltage reaches a preset charging voltage value so as to charge the filter capacitor, and controlling the electronic switch to be switched off when the voltage reaches a preset discharging voltage value so as to discharge the filter capacitor. Therefore, when the electronic equipment is in a standby state, the voltage of the filter capacitor can be maintained in a low-voltage state on the premise of maintaining the necessary output power of the switching power supply, and the standby power consumption of the switching power supply is effectively reduced.
Referring to fig. 5, in the second embodiment, based on the first embodiment, the step S3 is further preceded by:
step S5, reducing the output voltage value of the input power supply by volts, and monitoring the output voltage value of the switching power supply;
in this embodiment, the input power source may be a dc power source or an ac power source. Different input power supplies correspond to different calculation methods or test methods. The following description will be given taking a dc power supply as an example. The output voltage amplitude of the dc power supply may be set to a standard mains voltage value, such as 220V mains, and the corresponding output power value of the input power supply is 220V. The output voltage value of an input power source, such as a dc power source, may be reduced by one volt, for example, … … when the output power source of the dc power source is monitored to have the output voltage values of 219V, 218V, 217V, 216V, and so on, corresponding to the monitoring of the output voltage value of the switching power source.
Of course, the output power value of the input power may be reduced by a predetermined magnitude, such as 2V, 3V, or 5V. If the output power supply values of the direct current power supply are monitored to be 218V, 216V, 214V and 212V, … … and the like, the output voltage value of the switching power supply is correspondingly monitored; or when the output power supply values of the direct current power supply are 217V, 214V, 211V and 208V, … … and the like are monitored, and the output voltage value of the switching power supply is correspondingly monitored; or monitoring … … when the output power supply value of the direct current power supply is 215V, 210V, 205V, 200V, and so on, and correspondingly monitoring the output voltage value of the switch power supply.
Step S6, determining that the monitored output voltage value of the switching power supply reaches a preset voltage value, and stopping reducing the output voltage value of the input power supply;
in this embodiment, the preset voltage value may be set to be that the output voltage value of the switching power supply exceeds a preset threshold, and the preset threshold may be 2% of the output voltage value of the switching power supply. Assuming that the output voltage value of the switching power supply required by the household appliance is 30V, if the output voltage value of the switching power supply is monitored to be 30.6V or more than 30.6V, it is indicated that the output voltage value of the switching power supply reaches a preset voltage value or exceeds the preset voltage value, and at this moment, the reduction of the output voltage value of the input power supply needs to be stopped.
In other embodiments, a difference between the monitored output voltage value of the switching power supply and the output voltage value of the switching power supply required by the household appliance may be calculated, and whether the difference exceeds a preset value may be determined.
And step S7, increasing the output voltage value of the input power supply by a preset voltage value to obtain the preset charging voltage value.
In this embodiment, the output voltage value of the input power at this time may be used as the preset charging voltage value; the output voltage value of the input power supply at this time may be increased by a preset voltage value to be the preset charging voltage value. That is, the preset voltage value may be set to 0V, 1V, 2V, 3V, or the like.
Since the output voltage value of the input power supply is the lowest voltage value at this time, in order to avoid the situation that the switching power supply cannot normally operate, it is preferable that the output voltage value of the input power supply at this time is increased by a preset voltage value to be the preset charging voltage value. The preset charging voltage value may be set to 1V, 2V, 3V, etc., and the specific voltage value is not specifically limited in the present invention.
When the output voltage value of the input power supply is obtained, the output voltage value of the input power supply is increased by the preset voltage value and then serves as the preset charging voltage value, so that the voltage of the filter capacitor can be maintained in a low-voltage state on the premise of maintaining the necessary output power of the switching power supply, and the standby power consumption of the switching power supply is effectively reduced.
Referring to fig. 6, in the third embodiment, based on the first or second embodiment, the step S4 is further preceded by:
step S8, determining to obtain the preset charging voltage value, and acquiring the current output current value of the input power supply;
step S9, obtaining the capacitance value of the filter capacitor and the period of the input power supply;
in this embodiment, when the preset charging voltage value U is obtained, for example, 31V, the current output current value Iavg of the input power supply is obtained, for example, 0.02A, the capacitance value C of the filter capacitor is obtained, for example, 20uF, and the period T of the input power supply is obtained, for example, 20ms (50Hz mains supply).
It is to be understood that the specific values of the above parameters are only used to help understanding the scheme of the present invention, and are not used for limitation.
Step S10, calculating the preset discharging voltage value according to the preset charging voltage value, the output current value of the input power supply, the capacitance value, and the period of the input power supply.
In this embodiment, the preset discharging voltage value U is calculated according to the preset charging voltage value U, the capacitance value C, and the period T of the input power supply0The specific calculation formula can be reasonably preset according to actual needs. For example, the calculation formula corresponding to when the dc power supply is used as the input power supply is different from the calculation formula corresponding to when the ac power supply is used as the input power supply. The calculation formula for ac power is relatively more complex because of the loss problem. Preferably, the present invention is described by taking a dc power supply as an example. For details, reference will not be made here.
Referring to fig. 7, in the fourth embodiment, based on the third embodiment, the step S10 includes:
step S101, obtaining a product of the preset charging voltage value, the output current value of the input power supply and the period of the input power supply;
in this embodiment, a product of the preset charging voltage value U, the output current value of the input power supply, and the period T of the input power supply is obtained to obtain U × Iavg × T.
Step S102, calculating a quotient value between the product and the capacitance value;
in this embodiment, a quotient between the product U × Iavg × T and the capacitance value C is calculated to obtain U × Iavg × T/C.
And S103, taking a sum of the quotient and the square of the preset charging voltage value, and solving the preset discharging voltage value by opening the sum.
In this embodiment, the quotient U × Iavg × T/C and the square U of the preset charging voltage value are first obtained2The sum of the two values is U, Iavg, T/C + U2Then, the square root of the sum is opened to obtain the preset discharge voltage value U0Namely:
U0＝(U*Iavg*T/C+U2)1/2；
wherein, U is a preset charging voltage value, Iavg is an output current value of the input power supply, T is a period of the input power supply, and C is a capacitance value of the filter capacitor.
It is understood that the formula can be modified or modified according to actual needs.
As an example, actually measuring a 5W applied to a flyback power supply (full voltage input) of a microwave oven, when 230V ac mains supply is input, the standby power consumption of the microwave oven is 0.67W, and the bus voltage is according to the above U, U0And the control can reduce the power consumption by 60mW, which accounts for 9 percent of the standby power consumption of 670 mW.
The invention also provides a switching power supply, which comprises a processor and a control program which is stored in the processor and can run on the processor and is used for reducing the standby power consumption of the switching power supply, wherein the control program for reducing the standby power consumption of the switching power supply realizes the steps of the control method for reducing the standby power consumption of the switching power supply when being executed by the processor.
The invention also provides electronic equipment which comprises the switching power supply.
The invention also provides a computer readable storage medium, which stores a control program for reducing the standby power consumption of the switching power supply, and the control program for reducing the standby power consumption of the switching power supply is executed by a processor to realize the steps of the control method for reducing the standby power consumption of the switching power supply.
It is understood that the detailed description of the apparatus items is the same as the method items, and the detailed description is omitted here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a controlled terminal, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. A switching power supply, comprising a rectifier bridge, a filter capacitor connected to the rectifier bridge, an electronic switch connected in series to a charging circuit of the filter capacitor, and a controller connected to the electronic switch, wherein the controller is configured to:
determining that the electronic equipment is in a standby state, monitoring rectified voltage, determining that the voltage reaches a preset charging voltage value, controlling the electronic switch to be switched on so as to charge the filter capacitor, determining that the voltage reaches a preset discharging voltage value, and controlling the electronic switch to be switched off so as to discharge the filter capacitor;
the preset charging voltage value is a first charging voltage value in a voltage rising stage and/or a second charging voltage value in a voltage falling stage in a half-wave period.
2. The switching power supply according to claim 1, wherein the preset charging voltage value includes a first charging voltage value in a voltage rising phase and a second charging voltage value in a voltage falling phase in a half-wave cycle, and the first charging voltage value is smaller than the second charging voltage value.
3. The switching power supply according to claim 2, wherein a time for the voltage to reach the preset discharge voltage value from the first charge voltage value is equal to a time for the voltage to reach the preset discharge voltage value from the second charge voltage value.
4. The switching power supply according to claim 1, further comprising a positive bus bar connecting a positive output terminal of an input power supply and a negative bus bar connecting a negative output terminal of the input power supply, the positive bus bar connecting the rectifier bridge and the electronic switch, respectively, and the negative bus bar connecting the rectifier bridge and the filter capacitor, respectively.
5. The switching power supply according to any one of claims 1 to 4, further comprising a power chip connected to the filter capacitor.
6. A control method for reducing the standby power consumption of a switching power supply is characterized by comprising the following steps:
acquiring the current state of the electronic equipment;
determining that the electronic equipment is in a standby state, and monitoring rectified voltage;
determining that the voltage reaches a preset charging voltage value, and controlling an electronic switch of the switching power supply to be switched on so as to charge a filter capacitor of the switching power supply;
determining that the voltage reaches a preset discharge voltage value, and controlling the electronic switch to be switched off so as to discharge the filter capacitor;
the preset charging voltage value is a first charging voltage value in a voltage rising stage and/or a second charging voltage value in a voltage falling stage in a half-wave period.
7. The control method for reducing the standby power consumption of the switching power supply as claimed in claim 6, wherein the step of determining that the voltage reaches a preset charging voltage value and controlling the electronic switch of the switching power supply to be turned on to charge the filter capacitor of the switching power supply further comprises:
reducing the output voltage value of an input power supply by volts, and monitoring the output voltage value of the switching power supply;
determining that the monitored output voltage value of the switching power supply reaches a preset voltage value, and stopping reducing the output voltage value of the input power supply;
and increasing the output voltage value of the input power supply by a preset voltage value to be used as the preset charging voltage value.
8. The method as claimed in claim 7, wherein the step of determining that the voltage reaches a preset discharge voltage value and controlling the electronic switch to be turned off to discharge the filter capacitor further comprises:
determining to obtain the preset charging voltage value, and acquiring the current output current value of the input power supply;
acquiring the capacitance value of the filter capacitor and the period of the input power supply;
calculating to obtain the preset discharging voltage value according to the preset charging voltage value, the output current value of the input power supply, the capacitance value and the period of the input power supply;
the step of calculating the preset discharge voltage value according to the preset charge voltage value, the output current value of the input power supply, the capacitance value and the period of the input power supply comprises:
obtaining the product of the preset charging voltage value, the output current value of the input power supply and the period of the input power supply;
calculating a quotient between the product and the capacitance value;
and taking a sum value between the quotient value and the square of the preset charging voltage value, and taking the sum value as a root to obtain the preset discharging voltage value.
9. The control method for reducing the standby power consumption of a switching power supply according to claim 8, wherein the input power supply is a direct current power supply.
10. The control method for reducing standby power consumption of a switching power supply according to claim 6, wherein the step of obtaining the current state of the electronic device is followed by further comprising:
and determining that the electronic equipment is in a non-standby state, and controlling the electronic switch to keep a conducting state.
11. A switching power supply, characterized in that the switching power supply comprises a processor and a control program for reducing the standby power consumption of the switching power supply, which is stored in the processor and can run on the processor, wherein the control program for reducing the standby power consumption of the switching power supply realizes the steps of the control method for reducing the standby power consumption of the switching power supply according to any one of claims 6 to 10 when being executed by the processor.
12. An electronic device characterized in that it comprises a switched-mode power supply as claimed in claim 11.
13. A computer-readable storage medium, wherein the computer-readable storage medium has stored thereon a control program for reducing the standby power consumption of a switching power supply, and the control program is executed by a processor to implement the steps of the control method for reducing the standby power consumption of a switching power supply according to any one of claims 6 to 10.
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| CN202109612U (en) * | 2011-06-13 | 2012-01-11 | 珠海格力电器股份有限公司 | Control system for standby power consumption of air-conditioner outdoor unit |
| CN103066690B (en) * | 2013-01-04 | 2015-09-30 | 广东美的制冷设备有限公司 | Low-power consumption standby circuit |
| CN204103755U (en) * | 2014-09-04 | 2015-01-14 | 江西双宏科技电气有限公司 | A kind of Surge suppression rectifying protective circuit |
| CN104633861B (en) * | 2015-01-31 | 2017-06-30 | 广东美的制冷设备有限公司 | A kind of convertible frequency air-conditioner and its power-supplying circuit |
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