CN111464021A - Switching power supply circuit, control method and device thereof, and electrical equipment - Google Patents
Switching power supply circuit, control method and device thereof, and electrical equipment Download PDFInfo
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- CN111464021A CN111464021A CN202010426613.7A CN202010426613A CN111464021A CN 111464021 A CN111464021 A CN 111464021A CN 202010426613 A CN202010426613 A CN 202010426613A CN 111464021 A CN111464021 A CN 111464021A
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- power supply
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- supply circuit
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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
- 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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Abstract
The embodiment of the application provides a switching power supply circuit, a control method and device thereof and electrical equipment, relates to the field of electronic circuits, and can improve the working stability of a switch module in the switching power supply circuit and reduce the failure rate of the switch module. The circuit includes: the capacitive energy storage module comprises a switch module, a capacitive energy storage module and an energy discharge module; the first end of the switch module is connected with the output end of the switch power supply, the second end of the switch module is connected with the first end of the capacitive energy storage module, and the second end of the capacitive energy storage module is connected with the input end of the load; the first end of the energy release module is connected with the second end of the switch module, and the second end of the energy release is connected with the first end of the switch module; the first end of the energy discharge module is in one-way conduction with the second end of the energy discharge module; the switch module is used for controlling the first end and the second end of the switch module to be disconnected when receiving a closing signal from the control device.
Description
Technical Field
The invention relates to the field of electronic circuits, in particular to a switching power supply circuit, a control method and a control device thereof and electrical equipment.
Background
At present, in order to reduce standby power consumption of an air conditioner and save energy, a 15V power supply of a dc motor corresponding to an indoor fan in the air conditioner is controlled, specifically, a structure shown in fig. 1 is used, and a control switch 03 is additionally arranged between a 15V power supply output end of a switching power supply 01 and a 15V power supply input end of a dc motor 02. When the direct current motor 02 needs to work (when the air conditioner is started up and operates), the switch control unit 04 controls the control switch 03 to be conducted, so that the direct current motor 02 can work normally; when the direct current motor does not need to work (when the air conditioner is in standby), the switch control unit 04 controls the control switch 03 to be switched off, so that the direct current motor 02 stops working because the direct current motor no longer receives electric energy. Therefore, the condition that the direct current motor 02 consumes electric energy of internal parts caused by electrifying in the standby state of the air conditioner is avoided, and the standby power consumption of the air conditioner is reduced.
However, referring to fig. 1, in the circuit design of the conventional air conditioner, a capacitive energy storage element 05 is connected to a 15V power input end of a dc motor 02, and when a switch control unit 04 controls a control switch 03 to be turned off, the capacitive energy storage element 05 releases energy to cause reverse impact on the control switch 03, so that the control switch 03 generates a quality risk. In the process of actually using the air conditioner, a user may have multiple control operations for starting and standby of the air conditioner within one day, so that the control switch 03 may also have multiple on and off operations, and the control switch 03 is frequently impacted by the discharge energy of the capacitive energy storage element 05, and thus the failure rate of the control switch 03 is high.
Disclosure of Invention
The embodiment of the invention provides a switching power supply circuit, a control method and a control device of the switching power supply circuit, and electrical equipment, which can improve the working stability of a switch module in the switching power supply circuit and reduce the failure rate of the switch module.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a switching power supply circuit is provided, including: the capacitive energy storage module comprises a switch module, a capacitive energy storage module and an energy discharge module; the first end of the switch module is connected with the output end of the switch power supply, the second end of the switch module is connected with the first end of the capacitive energy storage module, and the second end of the capacitive energy storage module is connected with the input end of the load; the first end of the energy release module is connected with the second end of the switch module, and the second end of the energy release is connected with the first end of the switch module; the first end of the energy discharge module is in one-way conduction with the second end of the energy discharge module; the switch module is used for controlling the first end and the second end of the switch module to be disconnected when receiving a closing signal from the control device.
In the technical solution provided by the above embodiment, because the switch module is connected in parallel with the energy bleeding module in the existing switch power supply circuit, when the switch power supply circuit operates, if the electrical equipment where the switch power supply circuit is located needs to enter the standby state and needs to stop power consumption of the load powered by the switch power supply circuit, the control device of the switch power supply circuit sends a closing signal to the switch module in the switch power supply circuit, and after the switch module receives the closing signal, the switch module controls the two ends of the switch module to be disconnected. And because the energy bleeder module is unidirectional conduction from the one end of connecting the capacitive energy storage module to the one end of connecting the switching power supply, so the disconnection of switching module can make the electric energy of capacitive energy storage module storage consume from the energy bleeder module, rather than consuming from the switching module, avoided the switching module (being equivalent to the control switch among the prior art) because frequent switching leads to the phenomenon that self frequently receives the electric energy that the capacitive energy storage module released, also reduced the probability that the switching module became invalid, guarantee the reliability of switching module work.
In a second aspect, there is provided a control method of the switching power supply circuit as provided in the first aspect, including: and when receiving the standby instruction, sending a closing signal to a switch module in the switching power supply circuit so as to disconnect the first end and the second end of the switch module.
In a third aspect, there is provided a control device of the switching power supply circuit as provided in the first aspect, comprising a receiving unit and a transmitting unit; a receiving unit for receiving a standby instruction; and the sending unit is used for sending a closing signal to a switch module in the switching power supply circuit when the receiving unit receives the standby instruction so as to disconnect the first end and the second end of the switch module.
A fourth aspect provides a control apparatus of the switching power supply circuit as provided in the first aspect, comprising a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the control device of the switching power supply circuit operates, the processor executes computer-executable instructions stored in the memory to cause the control device of the switching power supply circuit to execute the control method of the switching power supply circuit as provided in the second aspect.
In a fifth aspect, a computer-readable storage medium is provided, which stores computer-executable instructions, and when the computer executes the instructions, the control method of the switching power supply circuit provided in the second aspect is realized.
In a sixth aspect, an electrical apparatus is provided, which includes the switching power supply circuit provided in the first aspect and the control device of the switching power supply circuit provided in the third aspect.
The switching power supply circuit, the control method and the control device thereof, and the electrical equipment provided by the embodiment of the application have the advantages that the switching power supply circuit comprises: the capacitive energy storage module comprises a switch module, a capacitive energy storage module and an energy discharge module; the first end of the switch module is connected with the output end of the switch power supply, the second end of the switch module is connected with the first end of the capacitive energy storage module, and the second end of the capacitive energy storage module is connected with the input end of the load; the first end of the energy release module is connected with the second end of the switch module, and the second end of the energy release is connected with the first end of the switch module; the first end of the energy discharge module is in one-way conduction with the second end of the energy discharge module; the switch module is used for controlling the first end and the second end of the switch module to be disconnected when receiving a closing signal from the control device. The technical scheme that this application embodiment provided, in being equivalent to in current switching power supply circuit, parallelly connected the energy bleeder module of unidirectional conduction for the switch module, when switching power supply circuit operation, if the electrical equipment that its place needs to get into standby state and need make the load of switching power supply circuit power supply stop power consumptive time, switching power supply circuit's controlling means can send the close signal to the switch module in switching power supply circuit, after switch module received the close signal, can control its both ends disconnection. And because the energy bleeder module is unidirectional conduction from the one end of connecting the capacitive energy storage module to the one end of connecting the switching power supply, so the disconnection of switching module can make the electric energy of capacitive energy storage module storage consume from the energy bleeder module, rather than consuming from the switching module, avoided the switching module (being equivalent to the control switch among the prior art) because frequent switching leads to the phenomenon that self frequently receives the electric energy that the capacitive energy storage module released, also reduced the probability that the switching module became invalid, guarantee the reliability of switching module work.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a switching power supply circuit of an air conditioner provided in the prior art;
fig. 2 is a schematic diagram illustrating an effect of a switching power supply circuit of an air conditioner according to the prior art;
fig. 3 is a first schematic structural diagram of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 4 is a second schematic structural diagram of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 6 is a fourth schematic structural diagram of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 8 is a sixth schematic structural diagram of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 9 is a seventh schematic structural diagram of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram eight of a switching power supply circuit according to an embodiment of the present application;
FIG. 11 is a schematic diagram illustrating the effect of the switching power supply circuit shown in FIG. 10;
fig. 12 is a schematic flowchart of a control method of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of an electrical apparatus according to an embodiment of the present application;
fig. 14 is a schematic structural diagram of a control device of a switching power supply circuit according to an embodiment of the present disclosure;
fig. 15 is a schematic structural diagram of another control device of a switching power supply circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
It should be noted that in the embodiments of the present application, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that the intended meaning is consistent when the difference is not emphasized.
For the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present invention, the words "first", "second", and the like are used for distinguishing the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like are not limited in number or execution order.
At present, in order to reduce the standby power consumption of electrical equipment, a control switch is arranged between a switch power supply and a load inside the electrical equipment so as to timely cut off a path between the switch power supply and the load when the electrical equipment is in standby, so that the load does not consume electric energy when the electrical equipment is in standby. However, at present, in order to stabilize the working state of the load, a capacitive energy storage element (e.g., a capacitor) is disposed between the load and the power supply or on the load, so that once the control switch is turned off and on for many times, the control switch receives the impact of the electric energy released by the capacitive energy storage element for many times, and further the control switch has a high failure rate, and is not sufficient in working stability and easy to damage. Specifically, taking an air conditioner as an example, and taking a dc motor in a room as an example, a conventional switching power supply circuit for reducing standby power consumption of the air conditioner may be designed as shown in fig. 1.
For example, fig. 2 is a change curve of a current (dotted line) at two ends of a control switch 03 and a voltage (solid line) supplied by a switching power supply 01 to a direct current motor (load) in the switching power supply circuit shown in fig. 1 during a process from a normal operation to a standby of an air conditioner (electrical equipment) corresponding to the switching power supply circuit, wherein a longitudinal direction represents a current change and a transverse direction represents time for the current change curve; for the voltage profile, the vertical direction represents the voltage change and the horizontal direction is time. It can be seen from fig. 2 that, when the voltage provided by the switching power supply starts to decrease, the two ends of the control switch instantaneously generate a larger current, and the larger current does not disappear when the voltage provided by the switching power supply decreases to zero, but disappears after the voltage provided by the switching power supply returns to zero for a period of time.
In view of the above problem, referring to fig. 3, an embodiment of the present application provides a switching power supply circuit 30, which includes: a switching module 31, a capacitive energy storage module 32 and an energy discharge module 34.
A first end of the switch module 31 is connected to an output end of the switching power supply, a second end of the switch module 31 is connected to a first end of the capacitive energy storage module 32, and a second end of the capacitive energy storage module 32 is connected to an input end of the load 33; a first end of the energy discharge module 34 is connected to a second end of the switch module 31, and a second end of the energy discharge module 34 is connected to a first end of the switch module 31; the first end of the energy discharge module 34 is in one-way communication with the second end of the energy discharge module 34; the switch module 31 is configured to control the first terminal and the second terminal of the switch module 31 to be disconnected when receiving a closing signal from the control device.
For example, the control device may be a main control board of the electrical apparatus where the switching power supply circuit is located, or may be other devices implementing the control function in the electrical apparatus, and is not limited herein.
In the technical solution provided by the above embodiment, because the switch module is connected in parallel with the energy bleeding module in the existing switch power supply circuit, when the switch power supply circuit operates, if the electrical equipment where the switch power supply circuit is located needs to enter the standby state and needs to stop power consumption of the load powered by the switch power supply circuit, the control device of the switch power supply circuit sends a closing signal to the switch module in the switch power supply circuit, and after the switch module receives the closing signal, the switch module controls the two ends of the switch module to be disconnected. And because the energy bleeder module is unidirectional conduction from the one end of connecting the capacitive energy storage module to the one end of connecting the switching power supply, so the disconnection of switching module can make the electric energy of capacitive energy storage module storage consume from the energy bleeder module, rather than consuming from the switching module, avoided the switching module (being equivalent to the control switch among the prior art) because frequent switching leads to the phenomenon that self frequently receives the electric energy that the capacitive energy storage module released, also reduced the probability that the switching module became invalid, guarantee the reliability of switching module work.
In an implementation manner, referring to fig. 4, the switch module 31 includes a switch control unit 311 and a control switch 312; a first end of the control switch 312 is connected to the output end of the switching power supply, a second end of the control switch 312 is connected to the first end of the capacitive energy storage module 32, and a control end of the control switch 312 is connected to the switch control unit 311; the switch control unit 311 is configured to control the first terminal and the second terminal of the control switch 312 to be turned off when receiving a turn-off signal from the control device.
Optionally, referring to fig. 5, the control switch 312 includes a first transistor V1; a base electrode b of the first triode V1 is connected with the switch control unit 311, a first end of the first triode V1 is connected with the output end of the switching power supply, and a second end of the first triode V1 is connected with the first end of the capacitive energy storage module 32; a first terminal of the first transistor V1 is either one of the emitter e and the collector c of the first transistor V1, and a second terminal of the first transistor V1 is the other one of the emitter e and the collector c of the first transistor V1.
In practice, the transistors of the three types have a PNP type and an NPN type, when the base b of the PNP type triode is connected to a low level (so that a forward bias current exists between the emitter e and the base b), the emitter e and the collector c are conducted, and when the base b of the NPN type triode is connected to a high level (so that a forward bias current exists between the emitter e and the base b), the emitter e and the collector c are conducted. Specifically, when a PNP type triode is used, referring to a in fig. 5, an emitter e of the first transistor V1 is connected to the output terminal of the switching power supply as a first terminal, and a collector c of the first transistor V1 is connected to the first terminal of the capacitive energy storage module 32 as a second terminal. When using an NPN type triode, referring to b in fig. 5, the collector c of the first transistor V1 is connected to the output terminal of the switching power supply as a first terminal, and the base b of the first transistor V1 is connected to the first terminal of the capacitive energy storage module 32 as a second terminal.
Further optionally, in order to ensure that the first transistor V1 in the control switch 312 is reliably turned off when the voltage at the base b of the first transistor is not present, referring to fig. 5, the control switch 312 further includes a first resistance unit 3121; the first resistance unit 3121 is disposed between the base b of the first transistor V1 and the emitter e of the first transistor V1. For example, the first resistance unit 3121 may include only one resistance R1 as shown in fig. 5, and may also include a plurality of resistances, and when the first resistance unit 3121 includes a plurality of resistances, the plurality of resistances may be in a parallel relationship or a series relationship, and specifically, the resistance requirement of the first resistance unit 3121 is only required to be met according to actual requirements, and is not specifically limited herein. When the first resistance unit 3121 is disposed between the base b and the emitter e of the first transistor V1, since the emitter junction voltage-current characteristic exhibits strong nonlinearity, almost no current flows through the PN junction when the voltage across the transistor is below 0.3V. The voltage-current characteristics of the first resistance unit 3121 are linear, and the current is proportional to the voltage across the terminals. Therefore, when the output current of the front stage is small, almost all the current flows through the first resistance unit 3121, when the current is large, the current does not flow through the emitter junction until the voltage across the first resistance unit 3121 reaches the emitter junction turn-on voltage, and when the current continues to increase, the current in the emitter junction increases faster than the current in the resistor. Therefore, the first resistance unit 3121 can avoid malfunction caused by small current flowing through the emitter junction, and ensure reliable cut-off of the first transistor V1.
Further optionally, in order to ensure that the base b current of the first transistor V1 in the control switch 312 does not burn out the transistor too much, referring to fig. 5, the control switch 312 further includes a second resistor unit 3122; a first end of the second resistance unit 3122 is connected to the base b of the first transistor V1, and a second end of the second resistance unit 3122 is connected to the first end of the switch control unit 311. For example, the second resistance unit 3122 may include only one resistance R2 as shown in fig. 5, and may also include a plurality of resistances, and when the second resistance unit 3122 includes a plurality of resistances, the plurality of resistances may be in a parallel relationship or a series relationship, and specifically, the resistance requirement of the second resistance unit 3122 is only required to be met according to actual requirements, and is not limited herein.
Further optionally, because the actual sizes of the power supplied to the load side by the switching power supply and the power supplied to the control device are different, in order to achieve strong and weak electrical isolation between the circuit on the control device side and the circuit on the side where the switching power supply supplies the load power (the switching power supply, the load, the capacitive energy storage module, the control switch, and the energy discharge module) and prevent the circuit on the control device side and the circuit on the side where the switching power supply supplies the load power from interfering with each other, as shown in fig. 6, the switching control unit 311 includes an optical coupler B1; a first end of a light emitter in the optocoupler B1 is connected with the control device, and a second end of the light emitter is grounded; the first end of the light receiver of the optocoupler B1 is connected with the control end of the control switch 312, and the second end of the light receiver is grounded. In an implementation manner, in order to reduce the current on the light emitter in the optical coupler, referring to fig. 6, the second end of the light emitter is grounded through a third resistor unit 3111, and the third resistor unit 3111 may include only one resistor R3 as in fig. 6, or may include a plurality of resistors; when the third resistor unit 3111 includes a plurality of resistors, the plurality of resistors may be connected in parallel or in series, as long as the current limiting requirement is met, and the others are not particularly limited.
Further optionally, referring to fig. 7, the switch control unit 311 further includes an amplifying unit 3112; the input end of the amplifying unit 3112 is connected with the control device, and the output end of the amplifying unit 3112 is connected with the first end of the light emitter; the amplifying unit 3112 is configured to amplify the shutdown signal sent by the control device and send the amplified shutdown signal to the optocoupler. In an implementation manner, referring to fig. 7, the amplifying unit 3112 includes a second transistor V2 and a fourth resistor unit 31121; a base electrode of the second transistor V2 is connected to the first end of the fourth resistor unit 31121 and the control device, and an emitter electrode e of the second transistor V2 is connected to the amplifying power supply and the second end of the fourth resistor unit 31121; the collector c of the second transistor V2 is connected to the first end of the light emitter. As shown in fig. 7, the fourth resistor unit 31121 may include one resistor R4, or may include a plurality of resistors, and when the fourth resistor unit 31121 includes a plurality of resistors, the plurality of resistors may be connected in series or in parallel, as long as the requirement of the amplifying unit 3112 is met. The second triode is a PNP type in fig. 7, or an NPN type in practice, as long as the corresponding circuit structure is changed, and no specific limitation is made here. In one implementation, referring to fig. 7, in order to prevent the control device from sending too much current to the amplifying unit 3112, the base b of the second transistor V2 is connected to the control device through the fifth resistor unit 3113; the fifth resistance unit may include only one resistor R5 as shown in fig. 7, or may include a plurality of resistors, and when the fifth resistance unit includes a plurality of resistors, the plurality of resistors may be connected in series or in parallel, as long as the current limiting requirement is ensured, and the fifth resistance unit is not limited specifically herein.
Further alternatively, referring to fig. 8, the energy dump module 34 includes at least one diode. Specifically, taking the energy dump module including two diodes V3 and V4 as an example, referring to a in fig. 8, when at least one diode (V3 and V4) is connected in series to form a diode string 341, a first end (positive pole of V4) of the diode string 341 is connected to the second end of the control switch 312, and a second end (negative pole of V3) of the diode string 341 is connected to the first end of the control switch 312; the first terminal of the diode string 341 is unidirectionally conducted to the second terminal of the diode string 341. Referring to b of fig. 8, when at least one of the diodes (V3 and V4) is connected in parallel, the anode of any one of the diodes (V3 or V4) is connected to the second terminal of the control switch 312, and the cathode of any one of the diodes (V3 or V4) is connected to the first terminal of the control switch 312. It should be noted that the diodes in the energy bleeding module 34, whether connected in series or in parallel, are only required to ensure their functions in the circuit, and the rest is not specifically limited.
As a further alternative, and with reference to fig. 9, the capacitive storage module 32 comprises at least one capacitor. Specifically, taking the capacitive energy storage module 32 including two capacitors C1 and C2 as an example, referring to a in fig. 9, when at least one capacitor (C1 and C2) is connected in series to form the capacitor string 321, a first end (one end of C1) of the capacitor string 321 is connected to the second end of the control switch 312 and the input end of the load 33, and a second end (one end of C2) of the capacitor string 321 is grounded. Referring to b in fig. 9, when at least one of the capacitors (C1 and C2) is connected in parallel, the first terminal of any one of the capacitors (C1 or C2) is connected to the second terminal of the control switch 312 and the input terminal of the load 33, and the second terminal of any one of the capacitors (C1 or C2) is grounded. It should be noted that when capacitors are connected in series, the total capacitance will be reduced but the withstand voltage will be larger, when capacitors are connected in parallel, the total capacitance will be increased, and the withstand voltage will be the smallest one of the withstand voltages of the capacitors connected in parallel; in practice, the capacitors in the capacitive energy storage module 32 are connected in series or in parallel, depending on actual requirements, as long as the capacitors are ensured to function in the circuit, and no specific limitation is made here. In addition, when a capacitor having different polarities at both ends is used, the capacitor needs to be provided in consideration of the polarity. In practice, the capacitive energy storage module 32 and the load 33 are connected in parallel between the second terminal of the control switch 312 and the ground terminal, and the ground terminal of the load 33 is not shown in the drawings related to the embodiments of the present application.
For example, when the first resistance unit only includes the resistor R1, the second resistance unit only includes the resistor R2, the third resistance unit only includes the resistor R3, the fourth resistance unit only includes the resistor R4, the fifth resistance unit only includes the resistor R5, the capacitive energy storage module includes the electrolytic capacitor C1, the first transistor V1 and the second transistor V2 are both PNP transistors, and the energy discharge module only includes the diode V3, the switching power supply circuit provided in the embodiment of the present application is illustrated with reference to fig. 10.
For example, fig. 11 is a graph of the current (dotted line) at two ends of the control switch 312 and the voltage (solid line) supplied to the load 33 by the switching power supply in the switching power supply circuit shown in fig. 10, the change curve of the electrical equipment corresponding to the switching power supply circuit from the normal operation to the standby operation, in which the vertical direction represents the current change and the horizontal direction is time for the current change curve; for the voltage profile, the vertical direction represents the voltage change and the horizontal direction is time. As can be seen from fig. 11, when the switching power supply circuit provided in the embodiment of the present application is used, when the voltage supplied by the switching power supply starts to decrease, a small current is generated across the control switch, and the voltage supplied by the switching power supply quickly decreases to disappear when the voltage supplied by the switching power supply decreases to zero. Therefore, the switching power supply circuit provided by the embodiment of the application can improve the working stability of the switching module in the switching power supply circuit and reduce the failure rate of the switching power supply circuit.
The switching power supply circuit provided by the embodiment of the application, because the switching power supply circuit includes: the capacitive energy storage module comprises a switch module, a capacitive energy storage module and an energy discharge module; the first end of the switch module is connected with the output end of the switch power supply, the second end of the switch module is connected with the first end of the capacitive energy storage module, and the second end of the capacitive energy storage module is connected with the input end of the load; the first end of the energy release module is connected with the second end of the switch module, and the second end of the energy release is connected with the first end of the switch module; the first end of the energy discharge module is in one-way conduction with the second end of the energy discharge module; the switch module is used for controlling the first end and the second end of the switch module to be disconnected when receiving a closing signal from the control device. The technical scheme that this application embodiment provided, in being equivalent to in current switching power supply circuit, parallelly connected the energy bleeder module of unidirectional conduction for the switch module, when switching power supply circuit operation, if the electrical equipment that its place needs to get into standby state and need make the load of switching power supply circuit power supply stop power consumptive time, switching power supply circuit's controlling means can send the close signal to the switch module in switching power supply circuit, after switch module received the close signal, can control its both ends disconnection. And because the energy bleeder module is unidirectional conduction from the one end of connecting the capacitive energy storage module to the one end of connecting the switching power supply, so the disconnection of switching module can make the electric energy of capacitive energy storage module storage consume from the energy bleeder module, rather than consuming from the switching module, avoided the switching module (being equivalent to the control switch among the prior art) because frequent switching leads to the phenomenon that self frequently receives the electric energy that the capacitive energy storage module released, also reduced the probability that the switching module became invalid, guarantee the reliability of switching module work.
Referring to fig. 12, an embodiment of the present application further provides a control method for a switching power supply circuit, which is applied to a control device of the switching power supply circuit, for example, a main control board of an electrical apparatus where the switching power supply circuit is located. The method comprises a step 101 and a step 102.
101. And when receiving the standby instruction, sending a closing signal to a switch module in the switching power supply circuit so as to disconnect the first end and the second end of the switch module.
102. And when a starting-up instruction is received, sending a starting signal to the switch module so as to enable the first end and the second end of the switch module to be conducted.
The control method of the switching power supply circuit provided by the embodiment of the application is based on the switching power supply circuit provided by the embodiment, when a standby instruction is received, a closing signal can be sent to the switching module to disconnect the first end and the second end of the switching module, so that the switching power supply in the switching power supply circuit can not supply power to a load, the electric energy of the capacitive energy storage module is consumed from the energy release module, the switching module is prevented from receiving electric energy impact released by the capacitive energy storage module, the failure rate of the switching power supply circuit is reduced, and the working stability of the switching power supply circuit is improved. Furthermore, when a starting signal is received, a starting signal can be sent to the switch module in time so that the first end and the second end of the switch module are conducted, the switch power supply can supply power to the load in time, and normal operation of the load is guaranteed.
Referring to fig. 13, an electrical apparatus 130 is further provided in an embodiment of the present invention, and includes the switching power supply circuit 30 provided in the foregoing embodiment, and a control device 131 of the switching power supply circuit, which is capable of implementing the control method of the switching power supply circuit provided in the foregoing embodiment.
In an implementation manner, referring to fig. 14, the control device 131 of the switching power supply circuit specifically includes a receiving unit 1311 and a transmitting unit 1312; a receiving unit 1311 configured to receive a standby instruction; a sending unit 1312, configured to send a turn-off signal to the switch module in the switching power supply circuit to turn off the first terminal and the second terminal of the switch module when the receiving unit 1311 receives the standby instruction. The standby instruction may be triggered and sent by a user through a key operation on the electrical equipment, or sent by a user through a remote controller corresponding to the electrical equipment, or sent by a user through an operation on a terminal, which is not limited herein.
Optionally, the receiving unit 1311 is further configured to receive a boot instruction; the transmitting unit 1312 is further configured to transmit a turn-on signal to the switch module to turn on the first terminal and the second terminal of the switch module. The source of the power-on command and the standby command are the same.
The beneficial effects of the control device of the switching power supply circuit provided by the above embodiment can refer to the control method of the switching power supply circuit, and are not described herein again.
Referring to fig. 15, an embodiment of the present application further provides another control apparatus for a switching power supply circuit, including a memory 41, a processor 42, a bus 43, and a communication interface 44; the memory 41 is used for storing computer execution instructions, and the processor 42 is connected with the memory 41 through a bus 43; when the control device of the switching power supply circuit operates, the processor 42 executes computer-executable instructions stored in the memory 41 to cause the control device of the switching power supply circuit to execute the control method of the switching power supply circuit provided in the above-described embodiment.
In particular implementations, processor 42(42-1 and 42-2) may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 15, for example, as one embodiment. And as an example, the control means of the switching power supply circuit may comprise a plurality of processors 42, such as processor 42-1 and processor 42-2 shown in fig. 15. Each of the processors 42 may be a Single-core processor (Single-CPU) or a Multi-core processor (Multi-CPU). Processor 42 may refer herein to one or more devices, circuits, and/or processing cores that process data (e.g., computer program instructions).
The Memory 41 may be a Read-Only Memory 41 (ROM) or other types of static storage devices that can store static information and instructions, a Random Access Memory (RAM) or other types of dynamic storage devices that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a compact disc Read-Only Memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 41 may be self-contained and coupled to the processor 42 via a bus 43. The memory 41 may also be integrated with the processor 42.
In a specific implementation, the memory 41 is used for storing data in the present application and computer-executable instructions corresponding to software programs for executing the present application. The processor 42 may switch various functions of the control device of the power supply circuit by running or executing software programs stored in the memory 41, and calling up data stored in the memory 41.
The communication interface 44 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless local area Network (W L AN), and the like, and the communication interface 44 may include a receiving unit to implement a receiving function and a transmitting unit to implement a transmitting function.
The bus 43 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus 43 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 15, but this is not intended to represent only one bus or type of bus.
The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions are executed on a computer, the computer is enabled to execute the control method of the switching power supply circuit provided in the foregoing embodiment.
The embodiment of the present application further provides a computer program, where the computer program may be directly loaded into the memory and contains a software code, and the computer program is loaded and executed by a computer, so as to implement the control method of the switching power supply circuit provided in the foregoing embodiment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A switching power supply circuit, comprising:
the first end of the switch module is connected with the output end of the switch power supply, the second end of the switch module is connected with the first end of the capacitive energy storage module, and the second end of the capacitive energy storage module is connected with the input end of the load;
the first end of the energy discharge module is connected with the second end of the switch module, and the second end of the energy discharge module is connected with the first end of the switch module; the first end of the energy discharge module is in one-way conduction with the second end of the energy discharge module;
the switch module is used for controlling the first end and the second end of the switch module to be disconnected when receiving a closing signal from the control device.
2. The switching power supply circuit according to claim 1, wherein the switching module comprises: a switch control unit and a control switch;
the first end of the control switch is connected with the output end of the switch power supply, the second end of the control switch is connected with the first end of the capacitive energy storage module, and the control end of the control switch is connected with the switch control unit;
the switch control unit is used for controlling the first end and the second end of the control switch to be disconnected when receiving a closing signal from the control device.
3. The switching power supply circuit according to claim 2, wherein the control switch comprises a first transistor;
the base electrode of the first triode is connected with the switch control unit, the first end of the first triode is connected with the output end of the switch power supply, and the second end of the first triode is connected with the first end of the capacitive energy storage module; the first end of the first triode is one of an emitting electrode and a collecting electrode of the first triode, and the second end of the first triode is the other one of the emitting electrode and the collecting electrode of the first triode.
4. The switching power supply circuit according to claim 3, wherein the control switch further comprises a first resistance unit;
the first resistance unit is arranged between the base electrode of the first triode and the emitting electrode of the first triode.
5. The switching power supply circuit according to claim 3, wherein the control switch further comprises a second resistance unit;
the first end of the second resistance unit is connected with the base electrode of the first triode, and the second end of the second resistance unit is connected with the first end of the switch control unit.
6. The switching power supply circuit according to claim 2, wherein the switching control unit includes an optocoupler;
the first end of a light emitter in the optical coupler is connected with the control device, and the second end of the light emitter is grounded; the first end of the light receiver of the optical coupler is connected with the control end of the control switch, and the second end of the light receiver is grounded.
7. The switching power supply circuit according to claim 6, wherein the switching control unit further includes an amplifying unit;
the input end of the amplifying unit is connected with the control device, and the output end of the amplifying unit is connected with the first end of the illuminator;
the amplifying unit is used for amplifying the closing signal sent by the control device and then sending the closing signal to the optical coupler.
8. The switching power supply circuit according to claim 2, wherein the energy bleeding module comprises at least one diode;
when the at least one diode is connected in series to form a diode string, the first end of the diode string is connected with the second end of the control switch, and the second end of the diode string is connected with the first end of the control switch; the first end of the diode string is conducted to the second end of the diode string in a single direction;
when the at least one diode is in a parallel connection relationship, the anode of the diode is connected with the second end of the control switch, and the cathode of the diode is connected with the first end of the control switch.
9. The switching power supply circuit according to claim 2, wherein the capacitive energy storage module comprises at least one capacitor;
when the at least one capacitor is connected in series to form a capacitor string, a first end of the capacitor string is connected with a second end of the control switch and an input end of the load, and a second end of the capacitor string is grounded;
when the at least one capacitor is in a parallel connection relationship, the first end of the capacitor is connected with the second end of the control switch and the input end of the load, and the second end of the capacitor is grounded.
10. A control method of the switching power supply circuit according to any one of claims 1 to 9, comprising:
when a standby instruction is received, a closing signal is sent to a switch module in a switching power supply circuit, so that a first end and a second end of the switch module are disconnected.
11. A control device of a switching power supply circuit according to any one of claims 1 to 9, comprising: a receiving unit and a transmitting unit;
the receiving unit is used for receiving a standby instruction;
the sending unit is used for sending a closing signal to a switch module in a switching power supply circuit when the receiving unit receives the standby instruction, so that the first end and the second end of the switch module are disconnected.
12. An electrical apparatus, characterized by comprising a switching power supply circuit according to any one of claims 1 to 9 and a control device of the switching power supply circuit according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426613.7A CN111464021A (en) | 2020-05-19 | 2020-05-19 | Switching power supply circuit, control method and device thereof, and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426613.7A CN111464021A (en) | 2020-05-19 | 2020-05-19 | Switching power supply circuit, control method and device thereof, and electrical equipment |
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| CN111464021A true CN111464021A (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010426613.7A Pending CN111464021A (en) | 2020-05-19 | 2020-05-19 | Switching power supply circuit, control method and device thereof, and electrical equipment |
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| CN (1) | CN111464021A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560677A (en) * | 2013-10-25 | 2014-02-05 | 南京航空航天大学 | High-voltage direct-current power distribution unit and control method thereof |
| CN104810812A (en) * | 2014-01-28 | 2015-07-29 | 株式会社理光 | Electric apparatus and residual electric charge discharging method |
| CN105406290A (en) * | 2015-11-20 | 2016-03-16 | 普天智能照明研究院有限公司 | Light-load protection type socket |
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2020
- 2020-05-19 CN CN202010426613.7A patent/CN111464021A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560677A (en) * | 2013-10-25 | 2014-02-05 | 南京航空航天大学 | High-voltage direct-current power distribution unit and control method thereof |
| CN104810812A (en) * | 2014-01-28 | 2015-07-29 | 株式会社理光 | Electric apparatus and residual electric charge discharging method |
| CN105406290A (en) * | 2015-11-20 | 2016-03-16 | 普天智能照明研究院有限公司 | Light-load protection type socket |
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Application publication date: 20200728 |