CN114884203A - Power supply device and method - Google Patents

Power supply device and method Download PDF

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Publication number
CN114884203A
CN114884203A CN202210640100.5A CN202210640100A CN114884203A CN 114884203 A CN114884203 A CN 114884203A CN 202210640100 A CN202210640100 A CN 202210640100A CN 114884203 A CN114884203 A CN 114884203A
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CN
China
Prior art keywords
voltage
circuit
load
energy storage
output
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Pending
Application number
CN202210640100.5A
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Chinese (zh)
Inventor
焦海清
童建利
马成龙
冯明奇
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XFusion Digital Technologies Co Ltd
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XFusion Digital Technologies Co Ltd
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Priority to CN202210640100.5A priority Critical patent/CN114884203A/en
Publication of CN114884203A publication Critical patent/CN114884203A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
    • 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
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level

Abstract

The present application relates to the field of power supply technologies, and in particular, to a power supply apparatus and method. The device comprises: the circuit comprises a booster circuit, a first energy storage circuit and a switching device; the boost circuit comprises an input end and an output end, wherein the input end is connected with a power grid, the output end is connected with a load, and the boost circuit is used for boosting the voltage of the input end and outputting the voltage to the load through the output end so as to drive the load to operate; the switching device comprises a first state and a second state; when the switching device is in a first state, the first energy storage circuit is connected with the input end; when the switching device is in the second state, the first energy storage circuit is connected with the output end, and the first energy storage circuit is connected with the load. The device can realize long-time power failure maintenance.

Description

Power supply device and method
Technical Field
The present application relates to the field of power supply technologies, and in particular, to a power supply apparatus and method.
Background
An alternating current power supply (alternating current power supply) serves as a power supply device of the electric equipment, and can transmit electric energy of a power grid to the electric equipment so as to drive the electric equipment to operate. Because the alternating current power supply needs to be directly connected with a power grid, the power grid fluctuation needs to be dealt with. In general, in order to ensure the normal operation of the electrical equipment, it is required that the ac power supply can cope with a short interruption of the power grid, for example, a voltage drop (voltage dip) within 20 ms.
The existing alternating current power supply adopts a large-capacity capacitor as an energy storage module to supply power to electric equipment when the power grid is interrupted briefly. Such ac power supplies are bulky and costly.
Disclosure of Invention
The embodiment of the application provides a power supply device and method, which can realize long-time power failure maintenance.
In a first aspect, a power supply device is provided, including: the device comprises a booster circuit, a first energy storage circuit and a switching device; the boost circuit comprises an input end and an output end, wherein the input end is connected with a power grid, the output end is connected with a load, and the boost circuit is used for boosting the voltage of the input end and outputting the voltage to the load through the output end so as to drive the load to operate; the switching device comprises a first state and a second state; when the switching device is in a first state, the first energy storage circuit is connected with the input end; when the switching device is in the second state, the first energy storage circuit is connected with the output end, and the first energy storage circuit is connected with the load.
In the power supply apparatus, the switching means may switch the position of the first tank circuit between the input terminal and the output terminal of the booster circuit. Therefore, when the power grid is abnormal and the power cannot be effectively supplied to the booster circuit, namely when power failure occurs, the switching device can connect the first energy storage circuit to the input end of the booster circuit, so that the first energy storage circuit supplies power to the booster circuit, and the booster circuit can be guaranteed to continue to work.
In addition, the booster circuit can convert a lower input voltage into a higher voltage, so that when the voltage of the first energy storage circuit is reduced or becomes lower, the first energy storage circuit still serves as a power supply of the booster circuit, and the booster circuit provides electric energy for a load, so that the power-down holding time of the power supply device can be prolonged.
And when the power grid is normal, the switching device can connect the first energy storage circuit to the output end of the booster circuit, so that the first energy storage circuit stores electric energy under the action of the voltage output by the booster circuit.
In addition, the switching device can also connect the first energy storage circuit to the load, so that when the booster circuit is abnormal, the first energy storage circuit can directly supply power to the load to drive the load to continue to operate.
In a possible implementation manner, when the first voltage input by the power grid to the input end is not larger than the first threshold value, the switching device is in the first state, and the first energy storage circuit inputs the voltage to the input end.
In this embodiment, when the power grid is abnormal and the boost circuit cannot be effectively supplied with power, the switching device may connect the first energy storage circuit to the input end of the boost circuit, so that the first energy storage circuit may input voltage to the boost circuit, and the boost circuit is guaranteed to continue to operate.
In a possible embodiment, the switching device is in the second state when a first voltage input by the grid to the input terminal is greater than a first threshold value.
In this embodiment, when the grid is normal, the switching device may connect the first tank circuit to the output of the boost circuit, whereby the grid may provide electrical energy to the first tank circuit through the boost circuit so that the first tank circuit may store electrical energy.
In one possible embodiment, the first energy storage circuit stores electrical energy when the voltage output by the voltage boost circuit via the output terminal is greater than or equal to the operating voltage of the load.
In this embodiment, the first energy storage circuit may store electric energy, and the voltage of the stored electric energy is greater than or equal to the operating voltage of the load, so as to facilitate driving the load to continue to operate when the grid is abnormal or the voltage boost circuit is abnormal.
In one possible implementation, when the voltage output by the voltage boost circuit through the output end is smaller than the working voltage of the load, the first energy storage circuit outputs voltage to the load so as to drive the load to operate.
In this embodiment, the first tank circuit may drive the load to operate when the booster circuit is abnormal.
In a possible implementation manner, when the switching device is in the first state and when the ratio of the voltage of the output end of the voltage boosting circuit to the voltage is smaller than the second threshold value, the switching device is switched to the second state, and the first energy storage circuit outputs the voltage to the load.
In one possible embodiment, the power supply device further includes: the second energy storage circuit is connected with the output end and is connected with the load; when the voltage output by the booster circuit through the output end is greater than or equal to the working voltage of the load, the second energy storage circuit stores electric energy; and when the voltage output by the booster circuit is smaller than the working voltage of the load, the second energy storage circuit outputs voltage to the load.
In this embodiment, the second energy storage circuit may store electric energy when the voltage boost circuit is normal, and output a voltage to the load to drive the load to operate when the voltage boost circuit is abnormal, so that the power down holding time of the power supply device may be prolonged when the voltage boost circuit is abnormal.
In a possible embodiment, the switching device further comprises: the voltage detection circuit is used for detecting the voltage input to the input end by the power grid and/or the voltage output by the booster circuit through the output end; and the control circuit is used for controlling the switching device to switch between the first state and the second state according to the detection result of the voltage detection circuit.
In a possible embodiment, the switching device comprises a first contact coupled to the output, a second contact coupled to the input, and a third contact coupled to the first tank circuit, wherein the first state is composed of the second contact and the third contact being connected, and the second state is composed of the first contact and the third contact being connected.
This embodiment provides an implementation of the switching device, which is simple in structure and easy to operate, so that the switching device is low in cost and strong in operability.
In one possible implementation, a boost circuit includes: an inductor, a unidirectional conducting element and a switching element; the first end of the inductor is positioned at the input end, the second end of the inductor is connected with the one-way conduction element, and the one-way conduction element is positioned at the output end; one end of the switch element is connected with the second end, and the other end of the switch element is connected with the input end; wherein the switching element is repeatedly switched between an on-state and an off-state such that the voltage on the second terminal is greater than the voltage on the first terminal.
In one possible embodiment, the first threshold is 0V.
In one possible embodiment, the first tank circuit comprises at least one capacitor.
In this embodiment, the first tank circuit may be composed of at least one capacitor, and the implementation form is simple and low in cost. In addition, the booster circuit can convert a lower input voltage into a higher voltage, so that when the voltage of the at least one capacitor is reduced or becomes lower, the at least one capacitor still serves as a power supply of the booster circuit, and the booster circuit provides electric energy for a load, so that the power-down holding time of the power supply device can be prolonged.
In a second aspect, a power supply method is provided, which is applicable to the first aspect, and provides a power supply apparatus, where the power supply apparatus includes a power grid, a voltage boost circuit, a first energy storage circuit, a switching device, and a load, where the voltage boost circuit includes an input terminal and an output terminal, the input terminal is connected to the power grid, and the output terminal is connected to the load, and the method includes: detecting a first voltage input by a power grid to an input end of a booster circuit; when the first voltage is not larger than the first threshold value, connecting the input end and the first energy storage circuit, so that the first energy storage circuit inputs voltage to the input end; the booster circuit converts the voltage into an operating voltage of the load and outputs the operating voltage to the load.
In one possible embodiment, the method further comprises: when the first voltage is larger than the first threshold value, the output end and the first energy storage circuit are connected, and the first energy storage circuit and the load are connected.
In one possible embodiment, the method further comprises: when the voltage output by the boost circuit through the output end is greater than or equal to the working voltage, the first energy storage circuit stores electric energy.
In one possible embodiment, the method further comprises: when the voltage output by the boost circuit through the output end is smaller than the working voltage of the load, the first energy storage circuit is used for outputting the voltage to the load.
In one possible embodiment, after connecting the input terminal and the first tank circuit, the method further comprises: detecting the voltage of the output end of the booster circuit; when the output voltage of the boost circuit 210 is less than the operating voltage V1, the output terminal and the first tank circuit are connected such that the first tank circuit outputs a voltage to the load.
In one possible embodiment, the power supply device further includes: a second tank circuit connected in parallel with the load; after connecting the output and the first tank circuit, the method further comprises: when the voltage of the output end of the booster circuit is greater than or equal to the working voltage, the second energy storage circuit stores electric energy; and when the voltage output by the booster circuit is smaller than the working voltage, the second energy storage circuit outputs voltage to the load.
It is understood that the method provided by the second aspect may be implemented by the power supply apparatus provided by the first aspect, and therefore, reference may be made to the above description of the advantageous effects of the power supply apparatus for the advantageous effects of the method provided by the second aspect, and details are not described here.
In a third aspect, a power supply method is provided, which is applicable to the first aspect, and provides a power supply apparatus, where the power supply apparatus includes a power grid, a voltage boost circuit, a first energy storage circuit, a switching device, and a load, the voltage boost circuit includes an input terminal and an output terminal, the input terminal is connected to the power grid, and the output terminal is connected to the load, and the method includes: when the power grid inputs a first voltage to the input end of the booster circuit, detecting the voltage of the output end of the booster circuit; when the voltage of the output end of the booster circuit is smaller than the power voltage of the load, the input end and the first energy storage circuit are connected, so that the first energy storage circuit inputs the voltage to the input end, and the voltage is larger than a first threshold value; the booster circuit converts the voltage into an operating voltage of the load and outputs the operating voltage to the load.
In the method, when the booster circuit takes a power grid as a power supply, whether the power grid is abnormal or not can be judged by detecting the voltage of the output end of the booster circuit, and when the power grid is abnormal, the first energy storage circuit is connected to the input end of the booster circuit, so that the booster circuit drives a load to operate by taking the first energy storage circuit as the power supply.
In the scheme provided by the application, the position of the first energy storage circuit can be switched between the input end and the output end of the booster circuit. Therefore, when the power grid is abnormal and the booster circuit cannot be effectively powered, the first energy storage circuit is connected to the input end of the booster circuit, so that the first energy storage circuit supplies power to the booster circuit, the booster circuit can be guaranteed to continue to work, and long-time power failure maintenance is achieved.
In a fourth aspect, a cabinet is provided, in which a power supply device and a server are disposed, where the power supply device includes: the device comprises a booster circuit, a first energy storage circuit and a switching device; the booster circuit comprises an input end and an output end, the input end is connected with the power supply output end and is connected with the server, and the booster circuit is used for boosting the voltage of the input end and outputting the voltage to the server through the output end so as to drive the server to work; the switching device comprises a first state and a second state; when the switching device is in a first state, the first energy storage circuit is connected with the input end; when the switching device is in the second state, the first energy storage circuit is connected with the output end, and the first energy storage circuit is connected with the server.
In the power supply device, the switching device may switch the position of the first tank circuit between the input terminal and the output terminal of the booster circuit. Therefore, when the power supply is abnormal and the power cannot be effectively supplied to the booster circuit, namely when power failure occurs, the switching device can connect the first energy storage circuit to the input end of the booster circuit, so that the first energy storage circuit supplies power to the booster circuit, and the booster circuit can be ensured to continue to work.
In addition, the booster circuit can convert a lower input voltage into a higher voltage, so that when the voltage of the first energy storage circuit is reduced or becomes lower, the first energy storage circuit still serves as a power supply of the booster circuit, and the booster circuit provides electric energy for the server, so that the power-down holding time of the power supply device can be prolonged.
And when the power supply is normal, the switching device may connect the first tank circuit to the output terminal of the booster circuit, so that the first tank circuit stores electric energy under the action of the voltage output by the booster circuit.
In addition, the switching device can also connect the first energy storage circuit to the server, so that when the booster circuit is abnormal, the first energy storage circuit can directly supply power to the server to drive the server to continue to operate.
In a possible implementation manner, when the first voltage input to the input end by the power supply is not larger than the first threshold value, the switching device is in the first state, and the first energy storage circuit inputs the voltage to the input end.
In this embodiment, when the power supply is abnormal and cannot effectively supply power to the voltage boosting circuit, the switching device may connect the first energy storage circuit to the input terminal of the voltage boosting circuit, so that the first energy storage circuit may input voltage to the voltage boosting circuit to ensure the voltage boosting circuit to continue to operate.
In a possible implementation, when the first voltage input by the power supply to the input terminal is greater than the first threshold, the switching device is in the second state.
In this embodiment, when the power supply is normal, the switching device may connect the first tank circuit to the output terminal of the voltage boost circuit, whereby the power supply may supply the first tank circuit with electric energy through the voltage boost circuit, so that the first tank circuit may store the electric energy.
In one possible embodiment, the first energy storage circuit stores electric energy when the voltage output by the voltage boost circuit through the output terminal is greater than or equal to the operating voltage of the server.
In this embodiment, the first tank circuit may store electric energy, and the voltage of the stored electric energy is greater than or equal to the operating voltage of the server, so as to facilitate the server to continue to operate when the power supply is abnormal or the booster circuit is abnormal.
In one possible implementation mode, when the voltage output by the voltage boosting circuit through the output end is smaller than the working voltage of the server, the first energy storage circuit outputs voltage to the server so as to drive the server to operate.
In this embodiment, the first tank circuit may drive the server to operate when the boost circuit is abnormal.
In a possible implementation manner, when the switching device is in the first state and when the ratio of the voltage at the output end of the voltage boosting circuit to the voltage is smaller than the second threshold value, the switching device switches to the second state, and the first energy storage circuit outputs the voltage to the server.
In one possible embodiment, the power supply device further includes: the second energy storage circuit is connected with the output end and is connected with the server; when the voltage output by the booster circuit through the output end is greater than or equal to the working voltage of the server, the second energy storage circuit stores electric energy; and when the voltage output by the boosting circuit is smaller than the working voltage of the server, the second energy storage circuit outputs voltage to the server.
In this embodiment, the second energy storage circuit may store electric energy when the voltage boost circuit is normal, and output a voltage to the server to drive the server to operate when the voltage boost circuit is abnormal, so that the power down holding time of the power supply device may be prolonged when the voltage boost circuit is abnormal.
In a possible embodiment, the switching device further comprises: the voltage detection circuit is used for detecting the voltage input to the input end by the power supply and/or the voltage output by the booster circuit through the output end; and the control circuit is used for controlling the switching device to switch between the first state and the second state according to the detection result of the voltage detection circuit.
In a possible embodiment, the switching device comprises a first contact coupled to the output, a second contact coupled to the input, and a third contact coupled to the first tank circuit, wherein the first state is composed of the second contact and the third contact being connected, and the second state is composed of the first contact and the third contact being connected.
This embodiment provides an implementation of the switching device, which is simple in structure and easy to operate, so that the switching device is low in cost and strong in operability.
In one possible embodiment, a boost circuit includes: an inductor, a unidirectional conducting element and a switching element; the first end of the inductor is positioned at the input end, the second end of the inductor is connected with the one-way conduction element, and the one-way conduction element is positioned at the output end; one end of the switch element is connected with the second end, and the other end of the switch element is connected with the input end; wherein the switching element is repeatedly switched between an on-state and an off-state such that the voltage on the second terminal is greater than the voltage on the first terminal.
In one possible embodiment, the first threshold is 0V.
In one possible embodiment, the first tank circuit comprises at least one capacitor.
In this embodiment, the first tank circuit may be composed of at least one capacitor, and the implementation form is simple and low in cost. In addition, the booster circuit can convert a lower input voltage into a higher voltage, so that when the voltage of the at least one capacitor is reduced or becomes lower, the at least one capacitor still serves as a power supply of the booster circuit, and the booster circuit provides electric energy for the server, so that the power-down holding time of the power supply device can be prolonged.
Drawings
FIG. 1 is a schematic diagram of an AC power supply;
fig. 2 is a schematic structural diagram of a power supply device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a power supply device according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a flow of electrical energy provided by an embodiment of the present application;
FIG. 5 is a schematic diagram of a power flow provided by an embodiment of the present application;
FIG. 6 is a schematic diagram of a flow of electrical energy provided by an embodiment of the present application;
FIG. 7 is a schematic diagram of an electrical power flow provided by an embodiment of the present application;
fig. 8 is a flowchart of a power supply method provided in an embodiment of the present application;
fig. 9 is a flowchart of a power supply method provided in an embodiment of the present application;
fig. 10 is a flowchart of a power supply method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. It should be apparent that the embodiments described in this specification are only some embodiments of the present application, and not all embodiments.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the specification. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise.
Wherein in the description of the present specification, "/" indicates a meaning, for example, a/B may indicate a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present specification, "a plurality" means two or more.
In the description of the present specification, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may include one or more of that feature either explicitly or implicitly. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically stated.
Fig. 1 is a schematic structural diagram of an ac power supply. As shown in fig. 1, the ac power supply employs a capacitor C11 as a first stage power variation circuit or a Power Factor Correction (PFC) circuit, and employs a capacitor C12 and a transformer T1 as a second stage power variation circuit. Under the condition that a power grid connected with the device is normal, the first-stage power change circuit stores energy. When a power grid connected with the device is interrupted briefly, the first-stage power change circuit provides electric energy for the second-stage power change circuit, so that the second-stage power change circuit can supply power to a load, and power failure maintenance is achieved. The voltage wide-range input of the second-stage power variation circuit can be realized by Pulse Width Modulation (PWM) or Pulse Frequency Modulation (PFM). The power failure maintaining means that normal work of electric equipment is maintained when a power grid is interrupted.
Since the transformation ratio of the transformer T1 is fixed, the input voltage required by the second stage power varying circuit is limited in both the PWM and PFM modes to ensure a stable voltage output to the load. Taking the voltage required by the load as 12V as an example, it can be set that when the voltage input by the second stage power variation circuit (i.e. the voltage output by the capacitor C11) is less than 350V, for example, the second stage power variation circuit cannot stably output the voltage of 12V. The first stage power varying circuit, i.e., capacitor C11, may also be set to a voltage of, for example, 400V at steady state. Then the power W1 (1/2V C1V) for power-down retention 2 -350V 2 ) Wherein, C1 is the capacitance of the capacitor C11. Therefore, in order to make the power-down holding time period reach, for example, 20ms, it is necessary to add the capacitor C11 with a large capacitance capacity, which makes the ac power supply bulky and costly.
Fig. 2 is a schematic structural diagram of a power supply apparatus 200 according to an embodiment of the present disclosure. As shown in fig. 2, the input side of the power supply device 200 may be electrically connected to the power grid 100, and the output side may be electrically connected to the load 300, so as to transmit the voltage of the power grid 100 to the load 300, thereby driving the load 300 to operate or work. In some embodiments, the load 300 may be embodied as a transformer. The transformer corresponds at least one consumer. The operation or working of the load 300 refers to the operation or working of driving the corresponding electric device after the voltage is converted by the transformer. In some embodiments, the load 300 may specifically be an electric device 300, such as a server, a dc motor, and the like. In some embodiments, the power grid 100 may be utility power.
As shown in fig. 2, the power supply device 200 may include a voltage boosting circuit 210, a tank circuit 220, a tank circuit 230, and a switch S1. The input end of the boost circuit 201 is connected to the power grid 100, and the output end of the boost circuit 201 is connected to the input end of the energy storage circuit 230 and the input end of the load 300. Under the action of the switch, the energy storage circuit 220 can be switched between the input end and the output end of the voltage boost circuit 201, which will be described in detail below and will not be described herein again.
When the voltage of the grid 100 is greater than the threshold Y1, the voltage boost circuit 210 may boost the voltage of the grid 100 to the operating voltage V1, so as to apply the operating voltage V1 to the load 300, and drive the load 300 to operate. Wherein the threshold Y1 is a preset value, and the threshold Y1 is more than or equal to 0V. In one example, the threshold Y1 is 0V. The threshold value Y1 may also be referred to as a first threshold value.
Here, the operating voltage V1 is an operating voltage of the load 300, and is a voltage capable of driving the load 300 to operate normally or normally. When the load 300 is a power-driven device, the normal operation or normal operation of the load 300 means that the load 300 can implement a setting function. When the load 300 is a transformer, the normal operation or normal operation of the load 300 means that the voltage converted by the transformer can drive the electric device to realize the setting function.
With continued reference to fig. 2, the boost circuit 210 may include an inductor 211, a unidirectional conducting element 212, and a switching element 213. Wherein, the inductor 211 may be located at an input side of the boost circuit 210. Illustratively, the input terminal of the inductor 211 may be or be equivalent to the input terminal of the boost circuit 210.
The one-way conducting element 212 may be located at the output side of the boost circuit 210, so as to control the external voltage or current to be transferred from the output terminal of the boost circuit 210 to the inductor 211. In some embodiments, as shown in fig. 2, the unidirectional conducting element 212 may be a diode. In some embodiments, as shown in fig. 3, the unidirectional conducting element 212 may be a Bipolar Junction Transistor (BJT) or a field effect transistor (field effect transistor). Wherein, can carry out synchronous rectification control to triode or field effect transistor, make its unidirectional conduction. The synchronous rectification control can be specifically described with reference to the prior art, and is not described herein again.
One end of the switching element 213 is connected to the output terminal of the inductor 211, and a connection point of the switching element 213 and the output terminal of the inductor 211 is located between the unidirectional conducting element 212 and the inductor 211. The other end of the switching element 213 is grounded. Therefore, when the switching element 213 is in the on state, the power grid 100 or the energy storage circuit 220 and the inductor 211 form a loop, so that the inductor 211 can store energy. When the switching element 213 is in the off state, the inductor 211 is discharged, and a voltage can be output to the load 300.
Based on the above configuration, the operation principle of the booster circuit 210 is as follows.
The inductor 211 has a function of blocking a current change. When the switching element 213 is turned on, a first loop is formed between the inductor 211 and the power source (the power grid 100 or the energy storage circuit 220), and the load on the first loop is mainly the inductor 211, so that the current on the inductor 211 gradually increases. When the switching element 213 is turned off, a second loop is formed between the power source, the inductor 211 and the load 300. The second loop has a load 300 in series with an inductor 211 as compared to the first loop. The load 300 causes the current on the second loop to decrease, and the inductor 211 has a function of blocking the current change, when the inductor 211 discharges, i.e., outputs the current to the load 300. Therefore, the inductor 211 can still output a large current to the load 300 within a short time after the opening element 213 is turned off, so that the voltage applied to the load 300 is greater than the voltage of the power output, and a rise or amplification of the voltage at the load 300 is achieved.
In addition, the current output from the inductor 211 to the load 300 gradually decreases. In order to avoid that the current output from the inductor 211 to the load 300 is reduced too much and the stability of the voltage across the load 300 is affected, the switching element 213 may be turned on again to increase the current of the inductor 211. In this way, the switching element 213 can be rapidly switched between the on state and the off state (for example, the switching frequency is 2000Hz), and a stable voltage higher than the power supply voltage can be supplied to the load 300.
With continued reference to fig. 2, one end of the tank circuit 220 may be designated as terminal 222 and the other end may be designated as terminal 223. Wherein the terminal 223 is grounded and the terminal 222 can be connected to different components through the switch S1.
Specifically, the switch S1 may connect the terminal 222 of the tank circuit 220 and the output of the boost circuit 210, for example, the switch S1 connects the terminal 222 and one end of the unidirectional conducting element 212. At this time, since the tank circuit 220 and the load 300 are connected in parallel, the boost circuit 210 also applies the output voltage to the tank circuit 220, so that the tank circuit 220 stores electric energy. The switch S1 may also connect the terminal 222 of the tank circuit 220 to the boost circuit 210 input, e.g., the switch S1 connects the terminal 222 to one end of the inductor 211. At this time, the energy storage circuit 220 may serve as a power source of the voltage boost circuit 210, and the voltage boost circuit 210 may boost the voltage output by the energy storage circuit 220 to the operating voltage V1 of the load 300, so as to apply the operating voltage V1 to the load 300, thereby driving the load 300 to operate. Also, due to the function of the boost circuit 210, the tank circuit 220 can continuously apply the operating voltage V1 to the load 300 without being lowered due to the decrease in the power of the tank circuit 220.
In some embodiments, the tank circuit 220 may be comprised of at least one capacitor 221. When the at least one capacitor 221 is a plurality of capacitors 221, the plurality of capacitors 221 are arranged in parallel.
In some embodiments, as shown in fig. 2, switch S1 has contact 1, contact 2, and contact 3. Wherein contact 1 is coupled to the output of the boost circuit 210, contact 2 is coupled to the input of the boost circuit 210, and contact 3 is coupled to the terminal 222 of the tank circuit 220. Connection of terminal 222 of tank circuit 220 to the output of boost circuit 210 occurs when contact 3 is in contact or connected with contact 1. At this time, the terminal 222 serves as an input terminal of the tank circuit 220, receives the voltage output from the booster circuit 210, and stores the voltage. Connection of terminal 222 of tank circuit 220 to the input of boost circuit 210 when contact 3 is in contact or connected to contact 2. At this time, the terminal 222 serves as an output terminal of the tank circuit 220 and outputs a voltage to the booster circuit 210, instead of the grid 100, as a power source of the booster circuit 210. In one example, the switch S1 may be embodied as a relay. In another example, the switch S1 may be embodied as an electrically controlled switch.
The contact 1 may be referred to as a first contact, the contact 2 may be referred to as a second contact, and the contact 3 may be referred to as a third contact.
In this context, "contacting" is understood to mean "next to" in the present application, which generally means that two objects in the form of blocks or sheets are placed next to each other, or that one of the two objects is located on the surface of the other object. In addition, "connected" in the embodiments of the present application may mean that two objects are in direct contact. Wherein "contacting" is also to be understood as "connecting". "connected" may also mean that two objects are connected by a third object, i.e., one side or end of the third object contacts one of the two objects and the other side or end of the third object contacts the other of the two objects.
With continued reference to fig. 2, the tank circuit 230 may be comprised of at least one capacitor 231. When the at least one capacitor 231 is a plurality of capacitors 231, the plurality of capacitors 231 are arranged in parallel. When the output voltage of the boost circuit is greater than or equal to V1, the boost circuit 210 also applies an operating voltage V1 to the tank circuit 230, similar to the tank circuit 220, since the tank circuit 230 and the load 300 are connected in parallel, so that the tank circuit 220 stores electrical energy. When the output voltage of the boost circuit is less than V1, the energy storage power supply 230 can apply the operating voltage V1 to the load 300, and as the power of the energy storage circuit 230 decreases, the output voltage of the energy storage circuit 230 also decreases.
Optionally, as shown in fig. 2, the power supply device 200 may further include a control circuit 260, wherein whether the contact 3 is in contact with or connected to the contact 1 or connected to the contact 2 may be controlled by the control circuit 260. Specifically, the control circuit 260 may control the contact 3 to contact or connect with the contact 2 in the case where the output voltage of the voltage boosting circuit 210 is less than V1. The control circuit 260 may control the contact 3 to contact or connect with the contact 1 in the case where the output voltage of the boosting circuit 210 is greater than or equal to V1. The control circuit 260 may be an electronic device having a signal processing function. In one example, the control circuit 260 may be a Micro Controller Unit (MCU).
Optionally, with continued reference to fig. 2, the power supply apparatus 200 may further include a voltage detection circuit 250 for detecting the voltage of the power grid 100 and generating a voltage detection signal, wherein the voltage detection signal is used for indicating the voltage level of the power grid 100. As shown in fig. 2, one end of the voltage detection circuit 250 is coupled to one end of the power grid 100, and the other end of the voltage detection circuit 250 is coupled to the other end of the power grid 100, so that the voltage of the power grid 100 can be detected. In one example, the voltage detection circuit 250 may be embodied as a voltmeter.
The voltage detection circuit 250 is communicatively coupled to the control circuit 260 so that a voltage detection signal can be generated to the control circuit 260. The control circuit 260 may determine whether the voltage of the grid 100 is greater than the threshold Y1 based on the voltage detection signal, and further determine whether the output voltage of the voltage boost circuit 210 is greater than V1. Wherein, when the voltage of the power grid 100 is greater than the threshold value Y1, the control circuit 260 controls the contact 3 to contact or connect with the contact 1. When the voltage of the grid 100 is less than or equal to the threshold Y1, the control circuit 260 controls the contact 3 to contact or connect with the contact 2.
Alternatively, the voltage detection circuit 250 may also be used to directly detect the output voltage of the voltage boost circuit 210 and generate a voltage detection signal (not shown in the figure). The control circuit 260 may control whether the contact 3 is in contact with or connected to the contact 1 or connected to the contact 2 based on the voltage detection signal of the boosting circuit 210.
With continued reference to fig. 2, in some embodiments, the power supply device 200 may further include a rectifier circuit 240. The input terminal of the rectifying circuit 240 is connected to the output terminal of the grid 100, and the output terminal of the rectifying circuit 240 is connected to the booster circuit 210, so that when the current output from the grid 100 is ac, the ac can be rectified into dc and output to the booster circuit 210. In one example, as shown in fig. 2, the rectification circuit 240 may be composed of a plurality of diodes (diodes, D). The diodes have a unidirectional conduction characteristic, and a plurality of diodes can form a rectifier bridge circuit for rectifying alternating current into direct current. For a specific implementation manner of the rectifier circuit 240, reference may be made to the description of the prior art, and the embodiments of the present application are not limited in particular.
That is, the power supply device 200 can be in several different states:
and a state A: both grid 110 and boost circuit 210 are operating normally, which may also be referred to as a normal operating condition.
In this state, the output voltage of the grid 100 is greater than or equal to the threshold Y1 and the output voltage of the boost circuit 210 is greater than or equal to the operating voltage V1. At this time, as shown in fig. 4, the switch S1 is connected to the contact 3 and the contact 1, the energy storage circuit 220 is connected in parallel with the energy storage circuit 230, and the voltage boost circuit 210 can boost the voltage output by the grid 100 to the working voltage V1 of the load 300, so as to apply the working voltage V1 to the load 300, drive the load 300 to operate, and charge the capacitor 221 of the energy storage circuit 220 and/or the capacitor 231 of the energy storage circuit 230.
And a state B: the grid 110 is not operating properly, but the boost circuit 210 is operating properly, which may also be referred to as a power down hold state.
In this state, when the voltage of the grid 100 is less than the threshold Y1, the voltage of the voltage boost circuit 210 is also lower than the operating voltage V1 of the load 300. At this time, as shown in fig. 5, the changeover switch S1 is connected to the contact 3 and the contact 2, so that the tank circuit 220 can be used as a power source of the booster circuit 210, and thereby, the booster circuit 210 can boost the voltage output by the tank circuit 220 to the operating voltage V1 of the load 300, so as to apply the operating voltage V1 to the load 300, and drive the load 300 to operate. Due to the operation principle of the boost circuit 210, the voltage output by the tank circuit 220 can be amplified or boosted to the operating voltage V1 of the load 300 by the boost circuit 210 before the voltage output by the tank circuit 220 drops to the threshold Y1, so that the electric energy stored in the tank circuit 220 is fully utilized.
Optionally, in this state, the tank circuit 220 may also charge the tank circuit 230.
State B1: after the state B continues for a while, as the energy storage circuit 220 continues to discharge, the output voltage of the energy storage circuit 220 gradually decreases to be less than the threshold Y1, at this time, the output voltage of the voltage boost circuit 210 is again lower than the working voltage V1, and the state of the power supply apparatus 200 changes from the state B to the state B1, which may also be referred to as a single energy storage circuit power-down state.
In this state, as shown in fig. 6, the boosting circuit 210 stops operating, and the energy storage circuit 230 can continue to output power to the load 300, so that the normal operation time of the load 300 can be prolonged. It can be understood that in the case that the boosting circuit 210 stops operating, the energy storage circuit 230 outputs a gradually decreasing voltage to the load 300 because the energy storage circuit 230 loses its power source.
State B2: after the state B1 continues for a while, as the tank circuit 230 continues to discharge, the voltage output by the tank circuit 230 drops to the cut-off operating voltage V2 of the load 300, and the load 300 stops operating, which may also be referred to as a power-down end state.
That is, after the grid 100 fails, the load 300 can maintain normal operation for the sum of the time of the state B and the time of the state B1, which is more than the time of the prior art when only one energy storage circuit supplies power to the load, and the load 300 maintains normal operation.
And C, state C: the grid 100 may operate normally, but the boost circuit 210 may not operate normally.
In this state, although the output voltage of the grid may be greater than or equal to the threshold Y1, the output voltage of the boost circuit 210 is less than the operating voltage V1. At this time (i.e., when the power supply device 200 enters the state C), as shown in fig. 7, the switch S1 connects the contact 3 with the contact 1 or keeps the contact 3 connected with the contact 1, so that the energy storage circuit 220 and the energy storage circuit 230 can output power to the load 300 together to maintain the normal operation time of the load 300. When the contact 3 and the contact 1 are connected by the changeover switch S1, the changeover switch S1 disconnects the contact 3 and the contact 2 and connects the contact 3 to the contact 1 when the power supply apparatus 200 enters the state C. The switch S1 holding the contact 3 connected to the contact 1 means that when the contact 3 and the contact 1 are originally connected, the switch S1 maintains the current state and holds the contact 3 connected to the contact 1 when the power supply apparatus 200 enters the state C.
It is understood that the output voltages of the tank circuit 220 and the tank circuit 230 to the load 300 are gradually decreased, and when the output voltages of the tank circuit 220 and the tank circuit 230 both decrease to the cut-off operating voltage V2 of the load 300, the load 300 stops operating, and the state C changes to the state B2. Since the tank circuit 220 and the tank circuit 230 provide power during the state C, the output voltage to the load 300 will decrease at a slower rate than when one tank circuit provides power, which can also increase the operating time of the load 300 compared to the prior art.
And a state D: neither the grid 110 nor the boost circuit 210 can operate properly, and in this state, the same method as in state C can be used to increase the operating time of the load 300. Thus, state C and state D may be collectively referred to as a dual tank power-down state.
That is to say, the power supply apparatus 200 provided by the embodiment of the present application can prolong the time that the load maintains normal operation when the circuit fails. Therefore, under the condition that the load maintains the normal working time unchanged, the power supply device 200 provided by the embodiment of the application can use a capacitor with smaller capacity, the volume of the passive device is greatly reduced, and meanwhile, the cost of the energy storage device is greatly reduced due to the fact that the capacitance value is greatly reduced.
Based on the above-described power supply apparatus 200, the present embodiment provides a power supply method. As shown in fig. 8, the method includes the following steps.
Step 801, detecting the voltage of the power grid 100. For example, the voltage of the power grid 100 may be detected using the voltage detection circuit 250 shown in fig. 2. Illustratively, step 801 may be performed periodically, such as at intervals T1, for example, once step 801 is performed.
In step 802a, when the voltage of the grid 100 is greater than the threshold Y1, the contact 3 of the switch S1 contacts the contact 1, and the grid 100 supplies power to the load 300 through the voltage boost circuit 210. For example, the detection result of the voltage of the power grid 100 by the voltage detection circuit 250 may be transmitted to the control circuit 260. The control circuit 260 may obtain the magnitude relationship between the voltage of the power grid 100 and the threshold Y1 according to the detection result. When the voltage of the power grid 100 is greater than the threshold Y1, the control circuit 260 may control the contact 3 to contact the contact 1, so that the voltage boost circuit 210 drives the load 300 to operate by using the power grid 100 as a power source.
In step 802b, when the voltage of the grid 100 is not greater than the threshold Y1, the contact 3 and the contact 2 of the switch S1 are contacted, and the energy storage circuit 220 supplies power to the load 300 through the voltage boost circuit 210. For example, as described above, the control circuit 260 may obtain the magnitude relationship between the voltage of the power grid 100 and the threshold Y1 according to the detection result. When the voltage of the power grid 100 is not greater than the threshold Y1, the control circuit 260 may control the contact point 3 and the contact point 2 to contact, so that the voltage boost circuit 210 drives the load 300 to operate by using the energy storage circuit 220 as a power source.
With continued reference to fig. 8, the method may further include step 803, when the energy of the tank circuit 220 is exhausted, the tank circuit 230 provides energy to the load 300. Specifically, when the tank circuit 220 supplies the load 300 through the boost circuit 210, the tank circuit 220 may supply energy to the tank circuit 230 and the load 300 such that the voltage across the tank circuit 230 and the load 300 is maintained at the operating voltage V1. When the energy stored in the energy storage circuit 220 is exhausted and the booster circuit 210 no longer supplies energy to the energy storage circuit 230 and the load 300, the energy storage circuit 230 continues to supply energy to the load 300, so that the power-down holding time can be prolonged.
In step 804, when the voltage output by the energy storage circuit 230 drops to the cut-off operating voltage V2 of the load 300, the power-down maintaining operation of the power supply apparatus 200 is finished. It will be appreciated that in the event that the tank circuit 220 is depleted of energy, the tank circuit 230 will output a voltage to the load 300 that gradually decreases as the tank circuit 230 loses its source of energy. When the voltage output by the tank circuit 230 drops to the cutoff operating voltage V2 of the load 300, the power down holding operation of the power supply device 200 ends.
The embodiment of the application also provides a power supply method. As shown in fig. 9, the method includes the following steps.
In step 901, when the power grid 100 is the power supply of the booster circuit 210, the output voltage of the booster circuit 210 is detected. For example, the voltage of the boosting circuit 210 may be detected using the voltage detecting circuit 250 shown in fig. 2. Illustratively, step 901 may be performed periodically, for example, at time interval T1, and step 901 is performed once.
When the output voltage of the voltage boost circuit 210 is greater than or equal to the operating voltage V1, the contact 3 and the contact 1 of the switch S1 are kept connected, and the power grid 100 continues to supply power to the load 300 through the voltage boost circuit 210 in step 902 a. For example, the detection result of the output voltage of the voltage detection circuit 250 to the voltage boost circuit 210 may be transmitted to the control circuit 260. The control circuit 260 can obtain the magnitude relation between the output voltage of the booster circuit 210 and the operating voltage V1 based on the detection result. When the output voltage of the voltage boost circuit 210 is greater than or equal to the operating voltage V1 threshold Y1, the control circuit 260 may control the contact 3 and the contact 1 to be continuously contacted, so that the voltage boost circuit 210 continues to operate with the power grid 100 as the power source to drive the load 300.
In step 902b, when the output voltage of the boost circuit 210 is less than the operating voltage V1, the contact 3 and the contact 2 of the switch S1 are contacted, and the tank circuit 220 is used as the power source of the boost circuit 210. In the case where the power grid 100 is the power source of the voltage boost circuit 210, if the output voltage of the voltage boost circuit 210 is less than the operating voltage V1, it indicates that the voltage of the power grid 100 may be abnormal. In this manner, the contact 3 and the contact 2 of the switch S1 are brought into contact, so that the tank circuit 220 is a power source of the booster circuit 210 and drives the load 300 to operate.
The embodiment of the application also provides a power supply method. As shown in fig. 10, the method includes the following steps.
In step 1001, when the grid 100 is the power supply of the booster circuit 210, the voltage of the grid 100 is detected.
In step 1002a, when the voltage of the grid 100 is greater than or equal to the threshold Y1, the contact 3 and the contact 1 of the switch S1 are connected or kept connected, and the output voltage of the voltage boost circuit 210 is measured.
In step 1003a, when the output voltage of the voltage boost circuit 210 is less than the operating voltage V1, the connection between the contact 3 and the contact 1 of the switch S1 is continuously maintained.
In step 1003b, when the output voltage of the voltage boosting circuit 210 is less than the operating voltage V1, the contact 3 and the contact 1 of the switch S1 are also kept in contact. When the voltage of the power grid 100 is greater than the threshold value Y1, the ratio of the output voltage of the voltage boost circuit 210 to the upper input voltage is less than the second threshold value, which indicates that the voltage boost circuit 210 is abnormal. In this case, contact 3 of switch S1 will be held in contact with contact 1 so that tank circuit 220 supplies power directly to load 300.
In step 1002b, when the voltage of the grid 100 is less than the threshold Y1, the contact 3 and the contact 2 of the switch S1 are connected or maintained, and the output voltage of the voltage boost circuit 210 is measured.
In step 1003c, when the output voltage of the voltage boost circuit 210 is less than the operating voltage V1, the connection between the contact 3 and the contact 2 of the switch S1 is continuously maintained.
In step 1003c, when the output voltage of the voltage boosting circuit 210 is less than the operating voltage V1, the contact 3 and the contact 2 of the switch S1 are connected. In this manner, the tank circuit 220 directly supplies power to the load 300.
A specific example of a power supply method is provided below, and an operating voltage V1 of the load 300 is 400V, and a cutoff operating voltage V2 is 350V. As described above, in the scheme shown in fig. 1, the power W1 for power-down retention is 1/2 Cl (400V) 2 -350V 2 ) 18750 × C1. Wherein, C1 is the capacitance of the capacitor C11.
In the scheme shown in fig. 2 or fig. 3, it can be assumed that the tank circuit 220 is formed by the capacitor 221, the tank circuit 230 is formed by the capacitor 231, and the capacitance C2 of the capacitor 221 is set to be 4 times the capacitance C3 of the capacitor 231. When the power supply apparatus 200 is used to supply power to the load 300, the voltage boost circuit 210 may ensure the normal operation of the load 300 before the voltage output by the capacitor 221 is 0. Therefore, in the case where the capacitor 221 is capable of providing the power W1 for power-down retention, the required capacitor capacity C2 of the capacitor 221 is 2 × W1/(400V) 2 -0V 2 )＝2*18750*C1/(400V 2 -0V 2 ) 0.23 × C1. Further, C2 is set to 4C 3. Therefore, the capacitance capacity C2+ C3 ≈ 0.29 ≈ C1 of the capacitance required by the power supply device 200. In other words, in having the same as the figureUnder the condition that the power-down holding time length of the scheme shown in fig. 1 is the same, the capacitance capacity (i.e., C2+ C3) required by the scheme provided by the embodiment of the application is 29% of the capacitance capacity (i.e., C1) required by the scheme shown in fig. 1. Therefore, the scheme provided by the embodiment of the application greatly saves the capacity of the capacitor, can reduce the volume of the power supply device, and simultaneously reduces the cost of the power supply device.
Returning to fig. 2, the power supply device 200 may further include a unidirectional conducting element 270. Wherein the guided pass element 270 is connected in parallel with the boost circuit 210. One end of the one-way conducting element 270 may be set as the end D1, and the other end may be set as the end D2. Wherein, the terminal D1 is connected with the power grid 100. Terminal D2 connects the input of the tank circuit 220 when contact 3 and contact 1 in the switch S1 are connected. Illustratively, the terminal D2 of the unidirectional conducting element 270 may also be connected to an input terminal of the tank circuit 230.
The unidirectional conducting element 270 allows current to flow from the grid 100 to the tank circuit 220 and the tank circuit 230. Therefore, the power supply device 200 charges the energy storage circuit 220 and/or the energy storage circuit 230 at the initial startup stage, so that the energy storage circuit 220 and the energy storage circuit 230 store more electric energy as soon as possible. It is understood that since the inductor 211 has the function of blocking the current variation, the current output by the boost circuit 210 is small and increases slowly in the initial starting phase of the power supply apparatus 200. At this stage, the grid 100 charges the energy storage circuit 220 and the energy storage circuit 230 through the line guiding the conducting element 270, so as to transfer more electric energy to the energy storage circuit 220 and the energy storage circuit 230 as soon as possible, so that the energy storage circuit 220 and the energy storage circuit 230 store more electric energy as soon as possible.
In some embodiments, as shown in fig. 2, the unidirectional conducting element 270 may be a diode. In some embodiments, the unidirectional conducting element 270 may be a transistor or a field effect transistor. The synchronous rectification control can be carried out on the triode or the field effect transistor, so that the triode or the field effect transistor is conducted in a single direction. The synchronous rectification control can be specifically described with reference to the prior art, and is not described herein again.
In the power supply device and the method provided by the embodiment of the application, all or almost all the electric energy stored in the energy storage circuit can be used for power-down retention, so that the requirement on the electric energy storage capacity of the energy storage circuit is lowered, the cost of the power supply device can be reduced, and the size of the power supply device is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A power supply device, comprising: the device comprises a booster circuit, a first energy storage circuit and a switching device; wherein the content of the first and second substances,
the boost circuit comprises an input end and an output end, the input end is connected with a power grid, the output end is connected with a load, and the boost circuit is used for boosting the voltage of the input end and outputting the voltage to the load through the output end so as to drive the load to operate;
the switching device comprises a first state and a second state;
when the switching device is in the first state, the first energy storage circuit is connected with the input end; when the switching device is in the second state, the first energy storage circuit is connected with the output end, and the first energy storage circuit is connected with the load.
2. The power supply device according to claim 1, wherein when a first voltage input by the power grid to the input terminal is not greater than a first threshold value, the switching device is in a first state, and the first energy storage circuit inputs the voltage to the input terminal to drive the load to operate through the boost circuit.
3. The power supply device according to claim 1, wherein the switching device is in the second state when a first voltage input by the power grid to the input terminal is greater than a first threshold value.
4. The power supply device according to claim 3, wherein the first energy storage circuit stores electric energy when the voltage output by the boost circuit through the output terminal is greater than or equal to the operating voltage of the load.
5. The power supply device according to claim 3, wherein when the voltage output by the boost circuit through the output terminal is smaller than the operating voltage of the load, the first energy storage circuit outputs a voltage to the load to drive the load to operate.
6. The power supply device according to claim 2, wherein when the switching device is in the first state and when the voltage output by the boost circuit through the output terminal is less than the operating voltage of the load, the switching device switches to the second state, and the first tank circuit outputs the voltage to the load.
7. The power supply device according to any one of claims 1 to 6, characterized in that the power supply device further comprises:
a second tank circuit connected to the output and to the load; wherein, the first and the second end of the pipe are connected with each other,
when the voltage output by the boost circuit through the output end is greater than or equal to the working voltage of the load, the second energy storage circuit stores electric energy; and the number of the first and second groups,
when the voltage output by the boosting circuit is smaller than the working voltage of the load, the second energy storage circuit outputs voltage to the load.
8. The power supply device according to any one of claims 1 to 7, wherein the switching device further includes:
the voltage detection circuit is used for detecting the voltage input to the input end by the power grid and/or the voltage output by the booster circuit through the output end;
and the control circuit is used for controlling the switching device to switch between the first state and the second state according to the detection result of the voltage detection circuit.
9. The power supply of any one of claims 1-8, wherein the switching device comprises a first contact coupled to the output, a second contact coupled to the input, and a third contact coupled to the first tank circuit, wherein the first state is comprised of the second contact and the third contact being connected, and wherein the second state is comprised of the first contact and the third contact being connected.
10. The power supply of any one of claims 1-9, wherein said first tank circuit comprises at least one capacitor.
CN202210640100.5A 2022-06-08 2022-06-08 Power supply device and method Pending CN114884203A (en)

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