CN115632549A - Electronic device, power supply circuit and control circuit thereof - Google Patents

Electronic device, power supply circuit and control circuit thereof Download PDF

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Publication number
CN115632549A
CN115632549A CN202211239049.3A CN202211239049A CN115632549A CN 115632549 A CN115632549 A CN 115632549A CN 202211239049 A CN202211239049 A CN 202211239049A CN 115632549 A CN115632549 A CN 115632549A
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CN
China
Prior art keywords
circuit
switch
turned
power supply
factor correction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211239049.3A
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Chinese (zh)
Inventor
张贺军
彭向标
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Huawei Digital Power Technologies Co Ltd
Original Assignee
Huawei Digital Power Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Digital Power Technologies Co Ltd filed Critical Huawei Digital Power Technologies Co Ltd
Priority to CN202211239049.3A priority Critical patent/CN115632549A/en
Publication of CN115632549A publication Critical patent/CN115632549A/en
Priority to PCT/CN2023/101494 priority patent/WO2024078002A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J9/062—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 AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33571—Half-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The application provides an electronic device, a power supply circuit and a control circuit thereof. The power supply circuit comprises a power factor correction circuit, a direct current bus, an inverter circuit, a voltage conversion circuit, a bidirectional rectification circuit and a battery. The first end of the power factor correction circuit receives input voltage, the second end of the power factor correction circuit is connected with the inverter circuit through the direct current bus, and the third end of the power factor correction circuit is connected with the battery through the voltage conversion circuit and the bidirectional rectifying circuit in sequence. The battery in the power supply circuit can multiplex partial circuits such as the power factor correction circuit and the like during charging and discharging, so that the structural complexity of the power supply circuit and the electronic equipment where the power supply circuit is located is reduced.

Description

Electronic device, power supply circuit and control circuit thereof
Technical Field
The present application relates to the field of power supply technologies, and in particular, to an electronic device, a power supply circuit, and a control circuit thereof.
Background
An Uninterruptible Power Supply (UPS) is a Power Supply that includes an energy storage device. The UPS can receive an input voltage in a first working mode, provide an output voltage to supply power to a load according to the input voltage, and simultaneously charge an energy storage device in the UPS according to the input voltage. The UPS can output voltage to supply power to the load through the energy storage device in the second working mode.
In the prior art, a power supply circuit of a UPS includes: power factor correction circuit, inverter circuit, push-pull circuit etc.. In a first working mode of the UPS, an input voltage provides an output voltage to a load through a power factor correction circuit and an inverter circuit; in a second mode of operation, the battery provides an output voltage to the load through the push-pull circuit and the inverter.
However, in the prior art, the power circuit of the UPS uses different circuits to provide output voltages to the load respectively in different operation modes, which results in a complicated structure of the power circuit. Therefore, how to reduce the structural complexity of the power circuit in the UPS is a technical problem to be solved in the art.
Disclosure of Invention
The application provides an electronic device, a power supply circuit and a control circuit thereof, which are used for solving the technical problem that the structure of the power supply circuit is complex.
A first aspect of the present application provides a power supply circuit comprising: the power factor correction circuit, direct current bus, inverter circuit, voltage conversion circuit, two-way rectifier circuit and battery. The first end of the power factor correction circuit is used for receiving input voltage, the second end of the power factor correction circuit is connected with the direct current bus, and the third end of the power factor correction circuit is connected with the first end of the voltage conversion circuit. The first end of the inverter circuit is connected with the direct current bus, and the second end of the inverter circuit is connected with the load. The first end of the voltage conversion circuit is connected with the power factor correction circuit, the second end of the voltage conversion circuit is connected with the direct current bus, and the third end of the voltage conversion circuit is connected with the first end of the bidirectional rectifying circuit. The second end of the bidirectional rectifying circuit is connected with the battery.
The power supply circuit provided by the embodiment of the application comprises at least two working modes, namely a first working mode and a second working mode. When the power supply circuit is in a first working mode, the power factor correction circuit receives input voltage and provides first bus voltage for the direct current bus; the DC bus provides an output voltage through an inverter circuit, and charges the battery through a voltage conversion circuit and a bidirectional rectifying circuit. When the power supply circuit is in a second working mode, the battery provides a second bus voltage for the direct current bus through the bidirectional rectifying circuit, the voltage conversion circuit and the power factor correction circuit; the DC bus provides output voltage through an inverter circuit.
The power supply circuit provided by this embodiment can realize multiplexing of circuits such as a power factor correction circuit, a voltage conversion circuit, a bidirectional rectifier circuit, and the like when operating in the first operating mode and the second operating mode. Therefore, the power supply circuit provided by the embodiment reduces the structural complexity, reduces the cost, and reduces the overall occupied volume of the device when the power supply circuit is realized through specific circuit devices.
In an embodiment of the first aspect of the present application, the power factor correction circuit includes: a first inductor and a first half-bridge circuit; the first half-bridge circuit is connected in parallel between the positive pole and the negative pole of the direct current bus; the first half-bridge circuit comprises a first switch and a second switch; the first end of the first inductor is used for receiving input voltage, and the second end of the first inductor is connected with the middle point of a bridge arm of the first half-bridge circuit; wherein: when the power supply circuit is in a first working mode, the first switch and the second switch are alternately switched on and off; when the first switch is turned off and the second switch is turned on, the input voltage charges the first inductor, and when the first switch is turned on and the second switch is turned off, the first inductor discharges to the direct-current bus; when the power supply circuit is in a second working mode, the first switch and the second switch are alternately switched on and off; when the first switch is turned off and the second switch is turned on, the battery discharges to the negative electrode of the direct current bus; when the first switch is turned on and the second switch is turned off, the battery discharges to the positive electrode of the direct current bus.
In the power supply circuit provided in this embodiment, when the power supply circuit operates in the first operating mode, the first switch and the second switch of the power factor correction circuit may be used to perform power factor correction processing on the input voltage provided by the power supply. When the power supply circuit works in the second working mode, the first switch and the second switch of the power factor correction circuit can be used for converting the alternating voltage provided by the voltage conversion circuit. Therefore, the power supply circuit provided by the embodiment reduces the structural complexity of the power supply circuit through the multiplexing of the power factor correction circuit, and the multiplexing circuit is simpler and easy to popularize and implement.
In an embodiment of the first aspect of the present application, the inverter circuit includes: a second inductor and a second half-bridge circuit; the second half-bridge circuit is connected between the positive electrode and the negative electrode of the direct current bus in parallel; the second half-bridge circuit comprises a third switch and a fourth switch; the first end of the second inductor is connected with the middle point of a bridge arm of the second half-bridge circuit, and the second end of the second inductor is used for providing output voltage; the third switch and the fourth switch are alternately switched on and off; when the third switch is turned on and the fourth switch is turned off, the positive electrode of the direct current bus provides output voltage through the third switch; when the third switch is turned off and the fourth switch is turned on, the negative electrode of the direct current bus provides output voltage through the fourth switch. The inverter circuit of the power circuit provided by the embodiment has a simple structure, so that the overall structural complexity of the power circuit can be reduced.
In an embodiment of the first aspect of the present application, a voltage conversion circuit includes: a resonant capacitor, a resonant inductor and a transformer; the first end of the resonant inductor is connected with the second end of the first inductor and the middle point of the bridge arm of the first half-bridge circuit, the second end of the resonant inductor is connected with the synonym end of the primary winding of the transformer through the resonant capacitor, the homonymy end of the primary winding is connected with the middle point of the direct-current bus, and the secondary winding of the transformer is connected with the bidirectional rectifying circuit. The voltage conversion circuit of the power circuit provided by the embodiment has a simpler structure, so that the overall structural complexity of the power circuit can be reduced.
In an embodiment of the first aspect of the present application, a bidirectional rectification circuit includes: the bridge arm middle point of the third half-bridge circuit is connected with the homonymous end of the secondary side winding, and the bridge arm middle point of the fourth half-bridge circuit is connected with the synonym end of the secondary side winding. The bidirectional rectifying circuit of the power circuit provided by the embodiment has a simpler structure, so that the structural complexity of the whole power circuit can be reduced.
In an embodiment of the first aspect of the present application, the power circuit further comprises a bypass switch. The first end of the bypass switch is connected with the input end of the power factor correction circuit, and the second end of the bypass switch is connected with the output end of the inverter circuit; when the bypass switch is turned off, the power supply circuit is in a first working mode or a second working mode; when the bypass switch is turned on, the power supply circuit is in a third working mode, the first end of the bypass switch receives input voltage, and the second end of the bypass switch provides output voltage. The power supply circuit that this embodiment provided can make power supply circuit work in the third mode of operation through bypass switch when power supply circuit and input voltage do not conform to the preset condition, protects power supply circuit to power supply circuit's stability and life have been improved.
In an embodiment of the first aspect of the present application, the power circuit further includes a first main circuit switch and a second main circuit switch. The first end of the first main circuit switch is connected with the first end of the bypass switch and used for receiving input voltage, and the second end of the first main circuit switch is connected with the input end of the power factor correction circuit; and the first end of the second main circuit switch is connected with the output end of the inverter circuit, and the second end of the second main circuit switch is connected with the second end of the bypass switch and used for providing output voltage. The power supply circuit provided by the embodiment can work in the first working mode or the second working mode through the first main circuit switch and the second main circuit switch when the power supply circuit and the input voltage thereof meet the preset condition, so that the power supply circuit can work normally.
In an embodiment of the first aspect of the present application, the power circuit further includes a first filter circuit, disposed at an input end of the power factor correction circuit, for performing filtering processing on an input voltage of the power factor correction circuit; and/or the second filter circuit is arranged at the output end of the inverter circuit and is used for filtering the output voltage of the inverter circuit. The power supply circuit provided by the embodiment can process the voltage through the first filter circuit and the second filter circuit, so that the quality of the voltage signal processed by the power supply circuit is improved, and the stability of the power supply circuit is improved.
The second aspect of the present application provides a control circuit of a power circuit, which includes a power factor correction circuit, a dc bus, an inverter circuit, a voltage conversion circuit, a bidirectional rectification circuit, and a battery; the first end of the power factor correction circuit is used for receiving input voltage, the second end of the power factor correction circuit is connected with the direct current bus, the third end of the power factor correction circuit is connected with the first end of the voltage conversion circuit, the first end of the inverter circuit is connected with the direct current bus, the second end of the inverter circuit is used for providing output voltage, the second end of the voltage conversion circuit is connected with the direct current bus, the third end of the voltage conversion circuit is connected with the first end of the bidirectional rectifying circuit, and the second end of the bidirectional rectifying circuit is connected with a battery; the power factor correction circuit comprises a first inductor and a first half bridge circuit; the first half-bridge circuit is connected between the positive pole and the negative pole of the direct current bus in parallel; the first half-bridge circuit comprises a first switch and a second switch; one end of the first inductor is used for receiving the input voltage, and the other end of the first inductor is connected with the middle point of a bridge arm of the first half-bridge circuit; the control circuit is used for controlling the first switch and the second switch; wherein, in response to the power supply circuit being in a first operating mode, the control circuit controls the first switch and the second switch to be alternately turned on and off; when the first switch is turned off and the second switch is turned on, the input voltage charges the first inductor, and when the first switch is turned on and the second switch is turned off, the first inductor discharges to the direct-current bus; in response to the power supply circuit being in a second operating mode, the control circuit controls the first switch and the second switch to alternately turn on and off; when the first switch is turned off and the second switch is turned on, the battery discharges to one pole of the direct current bus through the bidirectional rectifying circuit, the voltage conversion circuit and the second switch; when the first switch is turned on and the second switch is turned off, the battery discharges to the other pole of the direct current bus through the bidirectional rectifying circuit, the voltage conversion circuit and the second switch.
In an embodiment of the second aspect of the present application, the power supply circuit further includes: the first main circuit switch is connected with the bypass switch; a first end of the bypass switch is connected to a first end of the first main circuit switch and is configured to receive the input voltage, a second end of the first main circuit switch is connected to the power factor correction circuit, a second end of the bypass switch is connected to a second end of the second main circuit switch and is configured to provide the output voltage, and a first end of the second main circuit switch is connected to the inverter circuit; the control circuit is further configured to: in response to the input voltage and the power circuit meeting a preset condition, the control circuit controls the bypass switch to be turned off and the first switch and the second switch to be turned on; and responding to the fact that the input voltage and the power supply circuit do not accord with the preset condition, the control circuit controls the bypass switch to be switched on and the first switch and the second switch to be switched off.
A third aspect of the application provides an electronic device comprising a power supply circuit as provided in any of the first aspects of the application, or a control circuit comprising a power supply circuit as provided in any of the second aspects of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of an electronic device provided in the present application;
fig. 2 is a schematic structural diagram of another embodiment of an electronic device provided in the present application;
FIG. 3 is a schematic diagram of a power circuit in the prior art;
fig. 4 is a schematic structural diagram of an embodiment of a power supply circuit provided in the present application;
fig. 5 is a schematic structural diagram of an embodiment of a power supply circuit provided in 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 application, 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 application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The connection described in this application refers to direct or indirect connection. For example, a and B may be directly connected, or a and B may be indirectly connected through one or more other electrical components, for example, a and C may be directly connected, and C and B may be directly connected, so that a and B are connected through C. It is also understood that "a is connected to B" described herein may be a direct connection between a and B, or an indirect connection between a and B through one or more other electrical components.
Fig. 1 is a schematic structural diagram of an embodiment of an electronic device provided in the present application. The electronic device 1 shown in fig. 1 includes a power supply circuit 10 and a load 20. The power supply circuit 10 is configured to receive an input voltage V1 provided by a power supply 30, perform voltage conversion and other processing on the input voltage V1, provide an output voltage V2 for a load 20 inside the electronic device 1, and supply power to the load 20. The electronic device 1 shown in fig. 1 may be a network device, a mobile phone, a notebook computer, a computer case, a television, a smart tablet, an interactive tablet, an electric vehicle, an intelligent furniture device, an intelligent watch, or a wearable device.
Fig. 2 is a schematic structural diagram of another embodiment of the electronic device provided in the present application, and the electronic device 1 shown in fig. 2 includes a power supply circuit 10. The power supply circuit 10 is configured to receive an input voltage V1 provided by a power supply 30, perform voltage conversion and other processing on the input voltage V1, provide an output voltage V2 for a load 20 external to the electronic device 1, and supply power to the load 20. The electronic device 1 shown in fig. 2 may be a power supply device such as a power adapter, a charger, a car charging station, a mobile power supply, and the like.
In one embodiment, the power supply 30 may be disposed within the electronic device 1. Alternatively, the power supply 30 may also be a power supply external to the electronic device 1.
In one embodiment, the Power circuit 10 shown in fig. 1 and 2 may be an Uninterruptible Power Supply (UPS). When the UPS receives the input voltage V1 provided by the power supply 30, the UPS may provide the output voltage V2 to the load 20 according to the input voltage V1, and may also charge the energy storage device according to the input voltage V1. When the UPS does not receive the input voltage V1 provided by the power supply 30 and stores power in the energy storage device, the UPS may still continue to provide the output voltage V2 to the load 20 through the energy storage device such as a battery, so as to realize uninterrupted power supply to the load 20, thereby ensuring continuous operation of the load 20 to a certain extent.
For example, fig. 3 is a schematic diagram of a power circuit in the prior art. The power supply circuit 10 shown in fig. 3 includes: a Power Factor Correction (PFC) circuit 11, an inverter circuit 12, a charging circuit 13, a discharging circuit 14, a battery 15, and the like.
When the power circuit 10 receives the input voltage V1, processes the input voltage V1 through the power factor correction circuit 11 and the inverter circuit 12, and then provides the output voltage V2 to the load 20, it is determined that the power circuit 10 is in the first operating mode.
When the power circuit 10 is in the first operating mode, the pfc circuit 11 is configured to receive the input voltage V1 provided by the power source 30 and adjust the power factor of the input voltage V1, and then provide the input voltage V10 to the inverter circuit 12. The power factor correction circuit 11 includes a vienna PFC or the like. The power factor correction circuit 11 is connected to a load 20 through an inverter circuit 12, and the inverter circuit 12 processes an input voltage V10 received by the inverter circuit and supplies an output voltage V2 to the load 20. The power factor correction circuit 11 is also connected to the battery 15 through the charging circuit 13, and therefore the power factor correction circuit 11 also supplies the input voltage V11 to the charging circuit 13 in accordance with the input voltage V1. The charging circuit 13 may be a flyback circuit or the like. The charging circuit 13 is configured to process the input voltage V11 received by the charging circuit, and then provide an output voltage V12 to the battery 15 to charge the battery 15.
When the battery 15 in the power circuit 10 provides the output voltage V2 to the load 20 through the discharge circuit 14 and the inverter circuit 12, it is recorded that the power circuit 10 is in the second operation mode.
Then when the power supply circuit 10 is in the second mode of operation, the battery 15 provides the input voltage V13 to the discharge circuit 14. The discharge circuit 14 may be a push-pull circuit or the like. The discharge circuit 14 is configured to process the received input voltage V13 and supply the input voltage V10 to the inverter circuit 12, and the inverter circuit 12 is configured to process the received input voltage V10 and supply the output voltage V2 to the load 20.
However, in the prior art as shown in fig. 3, when the power circuit 10 is in different operation modes and different circuits are used to respectively provide output voltages to the load, the battery 15 is also charged or discharged through different circuits, which results in a complicated structure of the power circuit 10. Therefore, how to reduce the structural complexity of the power circuit 10 is a technical problem to be solved in the art.
The embodiment of the present application further provides a power circuit 10, and to address the defect that the circuit structure is complex in the power circuit 10 provided in the prior art shown in fig. 3, the present application adopts a manner of multiplexing partial circuits such as a power factor correction circuit in the power circuit 10, so that the partial circuits can be shared by charging and discharging the battery 100, and therefore, compared with the prior art shown in fig. 3, the power circuit 10 provided in the present application has the technical effect of having a lower structural complexity, and thus the defect in the prior art shown in fig. 3 is overcome.
The technical solution of the present application will be described in detail below with specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 4 is a schematic structural diagram of an embodiment of a power circuit provided in the present application. The power supply circuit 10 shown in fig. 4 can be applied to the electronic apparatus 1 shown in fig. 1 and 2. Specifically, the power supply circuit 10 shown in fig. 4 includes: a power factor correction circuit 101, a direct current bus 102, an inverter circuit 103, a voltage conversion circuit 104, a bidirectional rectifying circuit 105, and a battery 100.
A first terminal of the power factor correction circuit 101 is connected to the power supply 30, a second terminal of the power factor correction circuit 101 is connected to the dc bus 102, and a third terminal of the power factor correction circuit 101 is connected to a first terminal of the voltage conversion circuit 104. A first end of the inverter circuit 103 is connected to the dc bus 102, and a second end of the inverter circuit 103 is connected to the load 20. A first end of the voltage conversion circuit 104 is connected to the power factor correction circuit 101, a second end of the voltage conversion circuit 104 is connected to the dc bus 102, and a third end of the voltage conversion circuit 104 is connected to a first end of the bidirectional rectifying circuit 105. A second end of the bidirectional rectifying circuit 105 is connected to the battery 100.
When the power circuit 10 shown in fig. 4 is in the first operating mode, the first terminal of the power factor correction circuit 101 is configured to receive the input voltage V1 provided by the power source 30, convert the input voltage V1 in the form of alternating current into the first bus voltage VBUS1 in the form of direct current, and adjust the power factor of the input voltage V1, the second terminal of the power factor correction circuit 101 provides the first bus voltage VBUS1 to the direct current bus 102, and the third terminal of the power factor correction circuit 101 provides the input voltage V21 to the voltage conversion circuit 104. The dc bus 102 receives the first bus voltage VBUS1 and provides an input voltage V20 to the inverter circuit 103. The inverter circuit 103 inverts the received input voltage V20 and supplies an output voltage V2 to the load 20. The voltage conversion circuit 104 performs voltage conversion processing on the received input voltage V21, and then supplies an input voltage V22 in a first direction (a direction in which the input voltage is received from the voltage conversion circuit 104 and the output voltage is supplied to the battery 100) to the bidirectional rectifying circuit 105. The bidirectional rectifying circuit 105 rectifies the input voltage V22, and supplies a charging voltage V23 to the battery 100 to charge the battery 100.
When the power circuit 10 shown in fig. 4 is in the second operation mode, the first terminal of the power factor correction circuit 101 does not receive the input voltage V1 provided by the power supply 30. The battery 100 may provide the input voltage V24 in the second direction (the direction of receiving the input voltage from the battery 100 and providing the output voltage to the voltage conversion circuit 104) to the bidirectional rectifying circuit 105. The bidirectional rectifier circuit 105 inverts the input voltage V24 and supplies the input voltage V25 to the voltage converter circuit 104. The voltage conversion circuit 104 performs voltage conversion processing on the received input voltage V25, and then supplies the input voltage V26 to the third terminal of the power factor correction circuit 101. The input voltage V26 is rectified by the power factor correction circuit 101, and the second terminal of the power factor correction circuit 101 supplies the second bus voltage VBUS2 to the dc bus 102. After receiving the second bus voltage VBUS2, the dc bus 102 may provide an input voltage V20 to the inverter circuit 103. The inverter circuit 103 performs an inversion process based on the received input voltage V20, and then supplies an output voltage V2 to the load 20.
In one embodiment, the power factor correction circuit 101 in the power supply circuit 10 provided by the embodiment of the present application has three ports, so that when the voltage circuit 10 is in different operation modes, the power factor correction circuit 101 can implement multiplexing of the power factor correction circuit 101 based on its three ports.
When the power circuit 10 is in the first operating mode and the battery 100 is being charged, the first terminal of the power factor correction circuit 101 is available for receiving the input voltage V1, the second terminal is available for supplying power to the load 20, and the third terminal is available for charging the battery 100. When the power supply circuit 10 is in the second operation mode and the battery 100 is discharging, the third terminal of the power factor correction circuit 101 is available for receiving the voltage provided by the battery 100, and the second terminal is available for supplying power to the load 20.
Referring to fig. 4, when the power supply circuit 10 is in the first operating mode and the power supply circuit 10 charges the battery 100 according to the input voltage V1, the input voltage V1 is processed by the power factor correction circuit 101, the voltage conversion circuit 104 and the bidirectional rectifying circuit 105 in sequence, and then the charging voltage V23 is supplied to the battery 100. When the power supply circuit 10 is in the second operating mode and the battery 100 supplies power to the load 20 according to the output voltage V24 provided by the battery 100, the output voltage V24 of the battery 100 is processed by the bidirectional rectifying circuit 101, the voltage conversion circuit 104, the power factor correction circuit 101, the dc bus 102 and the inverter circuit 103 in sequence to provide the output voltage V2 to the load 20.
In summary, compared with the power circuit 10 provided in the prior art in fig. 3, in the power circuit 10 provided in this embodiment, when the power circuit 10 operates in the first operating mode and the second operating mode, the power factor correction circuit 101, the voltage conversion circuit 104, the bidirectional rectifying circuit 105, and other circuits can be used for charging and discharging the battery 100, so that the power factor correction circuit 101, the voltage conversion circuit 104, the bidirectional rectifying circuit 105, and other circuits in the power circuit 10 can be multiplexed. Therefore, the power supply circuit 10 provided in this embodiment does not need to be provided with a circuit dedicated to charging or discharging the battery 100, thereby reducing the structural complexity of the power supply circuit 10, reducing the cost of the power supply circuit 10, and reducing the overall occupied volume of the device when the power supply circuit 10 is implemented by a specific circuit device.
Fig. 5 is a schematic structural diagram of an embodiment of the power supply circuit provided in the present application, and fig. 5 shows a specific circuit implementation of the power supply circuit 10 provided in fig. 4. As shown in fig. 5:
the dc bus 102 includes: a first electrolytic capacitor C1, a second electrolytic capacitor C2, a positive electrode VBUS + and a negative electrode VBUS-. The first end of the first electrolytic capacitor C1 is connected to the positive electrode VBUS +, and the second end of the first electrolytic capacitor C1 is connected to the midpoint a of the dc bus 102. The first end of the second electrolytic capacitor C2 is connected with the midpoint A of the DC bus 102, and the second end of the second electrolytic capacitor C2 is connected with the negative pole VBUS-.
The power factor correction circuit 101 includes: a first inductor L1 and a first half-bridge circuit. The first half-bridge circuit includes a first switch Q1 and a second switch Q2. The first half-bridge circuit is connected in parallel between positive electrodes VBUS + and VBUS-of the direct current bus 102. A first end of the first inductor L1 is configured to receive an input voltage V1 provided by the power supply 30, and a second end of the first inductor L1 is connected to a bridge arm midpoint B1 of the first half-bridge circuit.
The inverter circuit 103 includes: a second inductor L2 and a second half-bridge circuit. The second half-bridge circuit includes a third switch Q3 and a fourth switch Q4. The second half-bridge circuit is connected in parallel between the positive poles VBUS + and VBUS-of the dc bus 102. A first end of the second inductor L2 is connected to the bridge arm midpoint B2 of the second half-bridge circuit, and a second end of the second inductor L2 is used to provide the output voltage V2 to the load 20.
The voltage conversion circuit 104 includes: a resonance capacitor Cr, a resonance inductor Lr and a transformer T. The first end of the resonant inductor Lr is connected to the second end of the first inductor L1 in the power factor correction circuit 101 and the bridge arm midpoint B1 of the first half-bridge circuit. The second end of the resonant inductor Lr is connected to the first end of the resonant capacitor Cr, and the second end of the resonant capacitor Cr is connected to the synonym end of the primary winding of the transformer T. The dotted end of the primary winding of the transformer T is connected to a point A1 of the dc bus 102, and the point A1 is connected to the midpoint a of the dc bus 102. The secondary winding of the transformer T is connected to a bidirectional rectifier circuit 105.
The bidirectional rectifying circuit 105 includes: a third half-bridge circuit and a fourth half-bridge circuit. The third half-bridge circuit includes a fifth switch Q5 and a sixth switch Q6, and the fourth half-bridge circuit includes a seventh switch Q7 and an eighth switch Q8. The bridge arm midpoint C of the third half-bridge circuit is connected with the dotted terminal of the secondary winding of the transformer T, and the bridge arm midpoint D of the fourth half-bridge circuit is connected with the dotted terminal of the secondary winding of the transformer T.
In one embodiment, the power supply circuit 10 shown in fig. 5 further includes: a first filter circuit 106 and a second filter circuit 107. The first filter circuit 106 is disposed at an input end of the power factor correction circuit 101, and is used for filtering an input voltage V1 provided by the power supply 30 to the power factor correction circuit 101. The second filter circuit is disposed at an output end of the inverter circuit 103, and is configured to perform filtering processing on the output voltage V2 provided by the inverter circuit 103 to the load 20.
In one embodiment, the power supply circuit 10 shown in FIG. 5 further includes a control circuit 108. The control circuit 108 may be used to control a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a fifth switch Q5, a sixth switch Q6, a seventh switch Q7, and an eighth switch Q8. For example, the control circuit 108 may send a control signal GQ1 to the control terminal of the first switch Q1, and the first switch Q1 is turned on according to the control signal GQ1, and the control principle of the control circuit 108 for other switches is the same, and is not described again.
In one embodiment, the switch is driven in such a way that the control signal is turned on when the control signal is at a high level and turned off when the control signal is at a low level. Illustratively, the control circuit 108 sends a high-level control signal GQ1 to the first switch Q1, and the first switch Q1 is turned on according to the high-level control signal GQ 1. The control circuit 108 transmits a low-level control signal GQ1 to the first switch Q1, and the first switch Q1 is turned off according to the control signal GQ 1. Alternatively, when the control circuit 108 does not transmit the control signal GQ1 to the first switch Q1, the first switch Q1 is turned off, and the like. It can be understood that the switch in the embodiment of the present application may also adopt other driving manners, and the driving manner of the switching tube in the embodiment of the present application is not limited.
In one embodiment, the switch provided in the power supply circuit 10 may be any one of a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), an Insulated Gate Bipolar Transistor (IGBT), a Bipolar power Transistor (Bipolar power Transistor), or a wide bandgap Semiconductor Field-Effect Transistor.
In one embodiment, the control circuit 108 may be a Pulse-width modulation (PWM) controller, a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or the like.
In one embodiment, the power circuit shown in fig. 5 further includes a bypass switch K1, a first main switch K2, and a second main switch K3. A first terminal of the first main switch K2 is configured to receive an input voltage V1 provided by the power supply 30 and is connected to a first terminal of the bypass switch K1, and a second terminal of the first main switch K2 is connected to a first terminal of a first inductor L1 of the power factor correction circuit 101. A first end of the second main switch K3 is connected to a second end of the second inductor L2 of the inverter circuit 103, and a second end of the second main switch K3 is used for providing the output voltage V2 to the load 20 and is connected to a second end of the bypass switch K1.
In one embodiment, when the bypass switch K1 is turned off, the first main circuit switch K2 is turned on, and the second main circuit switch K3 is turned on, the power circuit 10 is in the first operation mode or the second operation mode.
In one embodiment, when the bypass switch K2 is turned on, the first main circuit switch K2 is turned off, and the second main circuit switch K3 is turned off, the power circuit 10 is in a third operating mode, which may also be referred to as a bypass operating mode or the like. When the power circuit 10 is in the third operating mode, the first end of the bypass switch K1 receives the input voltage V1 provided by the power supply 30, and after the input voltage V1 passes through the bypass switch K2, the second end of the bypass switch K2 directly provides the output voltage V2 to the load 20.
In one embodiment, the control circuit 108 may be used to control the bypass switch K1, the first main switch K2, and the second main switch K3. In one embodiment, control circuit 108 may include one or more control units, each of which may control one or more of first switch Q1, \8230;, eighth switch Q8, bypass switch K1, first main switch K2, and second main switch K3.
Different operating modes of the power circuit 10 will be described with reference to the control circuit 108 controlling the first switch Q1, \8230 \, the eighth switch Q8, the bypass switch K1, the first main switch K2, and the second main switch K3.
In an embodiment, in response to that the power circuit 10 and the input voltage V1 thereof do not meet the preset condition, the control circuit 108 controls the bypass switch K2 to be turned on, the first main switch K2 to be turned off, and the second main switch K3 to be turned off, so that the power circuit 10 operates in the third operating mode.
In one embodiment, the predetermined condition includes that none of the devices in the power circuit 10 are normally faulty and the voltage value of the input voltage V1 is within the normal operating voltage range. When the control circuit 108 determines that the input voltage V1 is abnormal and/or that devices in the power circuit 10 are abnormal, the control circuit 108 may control the power circuit 10 to operate in the third operating mode. Alternatively, the control circuit 108 may receive indication information sent by an operator when the power circuit 10 and the input voltage V1 thereof do not meet the preset condition, and the control circuit 108 controls the power circuit 10 to operate in the third operating mode in response to the indication information.
In one embodiment, when the control circuit 108 is in the third operating mode and the input voltage V1 is at the positive half wave of the alternating current, the flowing direction of the current in the power circuit 10 is: the power supply comprises a power supply 30, a live wire L1, a bypass switch K1, a live wire L2, a load 20, a zero line N2, a zero line N1 and a power supply 30. When the input voltage V1 is at the negative half wave of the alternating current, the flowing direction of the current in the power supply circuit 10 is: the power supply comprises a power supply 30, a zero line N1, a zero line N2, a load 20, a live wire L2, a bypass switch K1, a live wire L1 and a power supply 30.
In one embodiment, in response to the power circuit 10 and the input voltage V1 thereof meeting the preset condition, the control circuit 108 controls the bypass switch K2 to be turned off, the first main switch K2 to be turned on, and the second main switch K3 to be turned on. At this time, when the power circuit 10 receives the input voltage V1 provided by the power supply 30, the control circuit 108 may operate the power circuit 10 in the first operation mode by controlling the switches in the power factor correction circuit 101, the inverter circuit 103, and the bidirectional rectifying circuit 105. When the power circuit 10 does not receive the input voltage V1 provided by the power supply 30, the control circuit 108 may control the switches in the power factor correction circuit 101, the inverter circuit 103 and the bidirectional rectifying circuit 105 to operate the power circuit 10 in the second operating mode.
In an embodiment, when the power circuit 10 operates in the first operating mode, the control circuit 108 controls the first switch Q1 and the second switch Q2 in the power factor correction circuit 101 to be alternately turned on and off, so that the input voltage V1 provides the first bus voltage VBUS1 to the dc bus 102 through the power factor correction circuit 101.
In an embodiment, when the power circuit 10 operates in the first operating mode, the control circuit 108 applies a frequency modulation control strategy to the first switch Q1 and the second switch Q2 to control the first switch Q1 and the second switch Q2 to be alternately turned on and off. Wherein, frequency modulation control strategy includes: the first switch Q1 and the second switch Q2 have different switching frequencies, i.e., the first switch Q1 and the second switch Q2 are turned on for different periods of time.
In one embodiment, when the power circuit 10 operates in the first operating mode, the control circuit 108 applies a frequency modulation control strategy to the fifth switch Q5, the sixth switch Q6, the seventh switch Q7 and the eighth switch Q8 to control the fifth switch Q5 and the sixth switch Q6 to be alternately turned on and off and to control the seventh switch Q7 and the eighth switch Q8 to be alternately turned on and off. Wherein, frequency modulation control strategy includes: the switching frequencies of the fifth switch Q5 and the sixth switch Q6 are different, and the switching frequencies of the seventh switch Q7 and the eighth switch Q8 are different, that is, the time duration for which the fifth switch Q5 and the sixth switch Q6 are turned on is different, and the time duration for which the seventh switch Q7 and the eighth switch Q8 are turned on is different.
The control principle of the control circuit 108 for the power factor correction circuit 101 and the bidirectional rectifier circuit 105 when the power supply circuit 10 operates in the first operation mode will be described below by taking an example in which the input voltage V1 is in the positive half-wave of the alternating current.
When the first switch Q1 is turned off and the second switch Q2 is turned on, the flowing direction of the current is: the direct current bus comprises a power supply 30, a live wire L1, a first inductor L1, a second switch Q2, a negative electrode VBUS-, a second electrolytic capacitor C2, a zero wire N1 and the power supply 30, wherein the negative electrode VBUS-, the second electrolytic capacitor C2 and the zero wire N1 are arranged on the direct current bus 102. At this time, the input voltage V1 may charge the first inductor L1 and provide the first bus voltage to the dc bus 102. The first bus voltage on the dc bus 102 may also charge the battery 100, with the current flowing in the direction: the negative pole VBUS-of the direct current bus 102, the second electrolytic capacitor C2, the primary winding of the transformer T, the resonant capacitor Cr, the resonant inductor Lr, the bridge arm midpoint B1 of the first half-bridge circuit, the second switch Q2 and the negative pole VBUS-of the direct current bus 102. The current flowing through the primary winding of the transformer T generates a primary winding voltage, which passes through the magnetic core of the transformer T to generate a secondary winding voltage on the secondary winding. The control circuit 108 can control the fifth switch Q5 to be turned on, the sixth switch Q6 to be turned off, the seventh switch Q7 to be turned off, and the eighth switch Q8 to be turned on, at this time, the flowing direction of the current between the secondary winding of the transformer T and the battery 100 is: a secondary winding, a fifth switch Q5, a battery 100, an eighth switch Q8 and a secondary winding.
When the first switch Q1 is turned on and the second switch Q2 is turned off, the flowing direction of the current is: the direct current power supply comprises a power supply 30, a live wire L1, a first inductor L1, a positive electrode VBUS + of a direct current bus 102, a first electrolytic capacitor C1, a zero wire N1 and the power supply 30. At this time, the first inductor L1 is discharged and supplies the first bus voltage to the dc bus 102. The first bus voltage on the dc bus 102 may also charge the battery 100, with the current flowing in the direction: the positive electrode VBUS + of the direct current bus 102, the first switch Q1, the resonant inductor Lr, the resonant capacitor Cr, the primary winding of the transformer T, the first electrolytic capacitor C1 and the positive electrode VBUS + of the direct current bus 102. The current flowing through the primary winding of the transformer T generates a primary winding voltage, which passes through the magnetic core of the transformer T to generate a secondary winding voltage on the secondary winding. The control circuit 108 can control the fifth switch Q5 to be turned off, the sixth switch Q6 to be turned on, the seventh switch Q7 to be turned on, and the eighth switch Q8 to be turned off, at this time, the flowing direction of the current between the secondary winding of the transformer T and the battery 100 is: secondary winding, seventh switch Q7, battery 100, sixth switch Q6, secondary winding.
It can be understood that when the input voltage V1 is in the negative half wave of the alternating current, the control principle of the control circuit 108 for the power factor correction circuit 101 is the same as the control principle of the positive half wave, and is not described again.
In one embodiment, when the power circuit 10 operates in the first operation mode, the control circuit 108 further controls the third switch Q3 and the fourth switch Q4 in the inverter circuit 103 to be turned on and off alternately, so that the first bus voltage VBUS1 of the dc bus 102 provides the output voltage V2 to the load 20.
The control principle of the inverter circuit 103 by the control circuit 108 when the power supply circuit 10 operates in the first operation mode will be described below by taking the positive half-wave of the alternating current as an example of the input voltage V1.
When the third switch Q3 is turned on and the fourth switch Q4 is turned off, the flowing direction of the current is: the positive electrode VBUS + of the dc bus 102, the third switch Q3, the second inductor L2, the live line L2, the load 20, the neutral line N2, the first electrolytic capacitor C1, and the positive electrode VBUS + of the dc bus 102. At this time, the positive electrode VBUS + of the dc bus 102 charges the second inductor L2, and the positive electrode VBUS + of the dc bus 102 provides the output voltage V2 to the load 20.
When the third switch Q3 is turned off and the fourth switch Q4 is turned on, the flowing direction of the current is: a negative pole VBUS-of the direct current bus 102, a fourth switch Q4, a second inductor L2, a live line L2, a load 20, a neutral line N2, a second electrolytic capacitor C2 and a negative pole VBUS-of the direct current bus 102. At this time, the second inductor L2 is discharged and the negative electrode VBUS-of the dc bus 102 provides the output voltage V2 to the load 20.
It can be understood that when the input voltage V1 is in the negative half wave of the alternating current, the control principle of the control circuit 108 on the inverter circuit 103 is the same as the control principle of the positive half wave, and is not described again.
In one embodiment, when the power circuit 10 operates in the second operation mode, the control circuit 108 controls the switches in the bidirectional rectifying circuit 105 and the power factor correction circuit 101 to enable the battery 100 to provide the second bus voltage VBUS2 to the dc bus 102 through the bidirectional rectifying circuit 105 and the voltage conversion circuit 104. The dc bus 102 may provide an output voltage V2 to the load 20 based on the second target line voltage VBUS2.
In one embodiment, when the power circuit 10 operates in the second operation mode, the control circuit 108 applies a phase-shift control strategy to the fifth switch Q5, the sixth switch Q6, the seventh switch Q7 and the eighth switch Q8 to control the fifth switch Q5 and the sixth switch Q6 to be alternately turned on and off and to control the seventh switch Q7 and the eighth switch Q8 to be alternately turned on and off. Wherein, frequency modulation control strategy includes: the fifth switch Q5 and the sixth switch Q6 have the same switching frequency, the phase angles of control signals for controlling the fifth switch Q5 and the sixth switch Q6 are different, the seventh switch Q7 and the eighth switch Q8 have the same switching frequency, and the phase angles of control signals for controlling the seventh switch Q7 and the eighth switch Q8 are different.
In one embodiment, when the power circuit 10 operates in the second operating mode, the control circuit 108 turns on the first switch Q1 and the second switch Q2 according to the positive and negative voltages provided by the voltage converting circuit 104, so that the first switch Q1 and the second switch Q2 are functionally equivalent to 2 diodes, and function to convert the ac voltage provided by the voltage converting circuit 104. The first switch Q1 and the second switch Q2 may obtain the second bus voltage VBUS2 in a direct current form according to the received alternating voltage.
Next, the control principle of the bidirectional rectifier circuit 105 and the power factor correction circuit 101 by the control circuit 108 when the power supply circuit 10 operates in the second operation mode will be described by taking the positive half-wave of the alternating current as an example of the input voltage V1.
When the fifth switch Q5 is turned on, the sixth switch Q7 is turned off, the seventh switch Q7 is turned off, the eighth switch Q8 is turned on, the first switch Q1 is turned off, and the second switch Q2 is turned on, the voltage provided by the battery 100 charges the negative electrode VUBS of the dc bus 102, and the current flows in the direction of: battery 100, fifth switch Q5, secondary winding, eighth switch Q8. At this time, the current flowing through the secondary winding generates a secondary winding voltage, and the secondary winding voltage generates a primary winding voltage on the primary winding through the magnetic core, so that the current flowing direction between the primary winding of the transformer T and the dc bus 102 is: the device comprises a primary winding, a second electrolytic capacitor C2, a second switch Q2, a resonant inductor Lr, a resonant capacitor Cr and a primary winding.
When the fifth switch Q5 is turned off, the sixth switch Q7 is turned on, the seventh switch Q7 is turned on, the eighth switch Q8 is turned off, the first switch Q1 is turned on, and the second switch Q2 is turned off, the voltage provided by the battery 100 charges the positive electrode VUBS + of the dc bus 102, and the current flows in the direction of: battery 100, seventh switch Q7, secondary winding, sixth switch Q6. At this time, the current flowing through the secondary winding generates a secondary winding voltage, and the secondary winding voltage generates a primary winding voltage on the primary winding through the magnetic core, so that the current flowing direction between the primary winding of the transformer T and the dc bus 102 is as follows: the device comprises a primary winding, a resonant capacitor Cr, a resonant inductor Lr, a first switch Q1, a first electrolytic capacitor C1 and the primary winding.
In one embodiment, when the power circuit 10 operates in the second operation mode, the control circuit 108 further controls the third switch Q3 and the fourth switch Q4 in the inverter circuit 103 to be turned on and off alternately, so that the second bus voltage VBUS2 of the dc bus 102 provides the output voltage V2 to the load 20.
When the voltage provided by the battery 100 charges the positive electrode VUBS + of the dc bus 102, the control circuit 108 controls the third switch Q3 to be turned on and the fourth switch Q4 to be turned off, and the flowing direction of the current is: positive electrode VBUS + of the dc bus 102, third switch Q3, live line L2, load 20, neutral line N2, first electrolytic capacitor C1, and positive electrode VBUS + of the dc bus 102. At this time, the positive pole VBUS + of the dc bus 102 provides the output voltage V2 to the load 20.
When the voltage provided by the battery 100 charges the negative electrode VUBS of the dc bus 102, the control circuit 108 controls the third switch Q3 to be turned off and the fourth switch Q4 to be turned on, and the current flows in the following direction: negative pole VBUS-of the direct current bus 102, a fourth switch Q4, a live line L2, a load 20, a zero line N2, a second electrolytic capacitor C2 and negative pole VBUS-of the direct current bus 102. At this time, the negative pole VBUS-of the dc bus 102 provides the output voltage V2 to the load 20.
The present application further provides an electronic device comprising a power supply circuit 10 as provided in any of the embodiments of the present application. Or a control circuit 108 including a power supply circuit 10 as provided in any of the embodiments of the present application.
In the foregoing embodiments, a method executed by a control circuit in a power supply circuit provided in the embodiment of the present application is described, but in order to implement each function in the method provided in the embodiment of the present application, a control circuit serving as an execution subject may include a hardware structure and/or a software module, and implement each function in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution. It should be noted that the division of the modules of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. The processing element may be a separate processing element, or may be integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a processing element of the apparatus may call and execute the functions of the above determination module. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software. For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).
In the above embodiments, the steps performed by the control circuit may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.
The present application also provides a computer readable storage medium having stored thereon computer instructions, which when executed, are operable to perform a method performed by a control circuit as in any of the previous embodiments of the present application.
The embodiment of the present application further provides a chip for executing the instruction, where the chip is configured to execute any one of the methods executed by the control circuit.
Embodiments of the present application further provide a computer program product, which includes a computer program, where the computer program is stored in a storage medium, and the computer program can be read from the storage medium by at least one processor, and the computer program can be executed by the at least one processor, so as to implement any of the methods performed by the control circuit according to the foregoing embodiments of the present application.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; the storage medium includes various media that can store program codes, such as ROM, magnetic disk, or optical disk.
Those of ordinary skill in the art will understand that: for convenience of explaining the technical solution of the present application, the functional modules in the embodiments of the present application are described separately, and circuit devices in the respective modules may partially or completely overlap, which is not intended to limit the scope of the present application.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. A power supply circuit, comprising:
the power factor correction circuit, the direct current bus, the inverter circuit, the voltage conversion circuit, the bidirectional rectifying circuit and the battery;
the first end of the power factor correction circuit is used for receiving input voltage, the second end of the power factor correction circuit is connected with the direct current bus, the third end of the power factor correction circuit is connected with the first end of the voltage conversion circuit, the first end of the inverter circuit is connected with the direct current bus, the second end of the inverter circuit is used for providing output voltage, the second end of the voltage conversion circuit is connected with the direct current bus, the third end of the voltage conversion circuit is connected with the first end of the bidirectional rectifying circuit, and the second end of the bidirectional rectifying circuit is connected with a battery;
when the power supply circuit is in a first working mode, the power factor correction circuit receives input voltage and provides first bus voltage for a direct current bus; the direct current bus provides output voltage through the inverter circuit, and the battery is charged through the voltage conversion circuit and the bidirectional rectifying circuit;
when the power supply circuit is in a second working mode, the battery provides a second bus voltage for the direct current bus through the bidirectional rectifying circuit, the voltage conversion circuit and the power factor correction circuit; the direct current bus provides output voltage through the inverter circuit.
2. The power supply circuit according to claim 1, wherein the power factor correction circuit comprises:
a first inductor and a first half-bridge circuit; the first half-bridge circuit is connected between the positive pole and the negative pole of the direct current bus in parallel; the first half-bridge circuit comprises a first switch and a second switch; the first end of the first inductor is used for receiving the input voltage, and the second end of the first inductor is connected with the middle point of a bridge arm of the first half-bridge circuit;
wherein: when the power supply circuit is in a first working mode, the first switch and the second switch are alternately switched on and off; when the first switch is turned off and the second switch is turned on, the input voltage charges the first inductor, and when the first switch is turned on and the second switch is turned off, the first inductor discharges to the direct-current bus;
when the power supply circuit is in a second working mode, the first switch and the second switch are alternately switched on and off; when the first switch is turned off and the second switch is turned on, the battery discharges to the negative electrode of the direct current bus; when the first switch is turned on and the second switch is turned off, the battery discharges to the positive electrode of the direct current bus.
3. The power supply circuit according to claim 2, wherein the inverter circuit comprises:
a second inductor and a second half-bridge circuit; the second half-bridge circuit is connected between the positive electrode and the negative electrode of the direct current bus in parallel; the second half-bridge circuit includes a third switch and a fourth switch; the first end of the second inductor is connected with the midpoint of a bridge arm of the second half-bridge circuit, and the second end of the second inductor is used for providing output voltage;
wherein the third switch and the fourth switch are alternately turned on and off; when the third switch is turned on and the fourth switch is turned off, the positive electrode of the direct current bus provides output voltage through the third switch; when the third switch is turned off and the fourth switch is turned on, the negative electrode of the direct current bus provides output voltage through the fourth switch.
4. The power supply circuit according to claim 3, wherein the voltage conversion circuit comprises:
a resonant capacitor, a resonant inductor and a transformer; the first end of the resonant inductor is connected with the second end of the first inductor and the middle point of a bridge arm of the first half-bridge circuit, the second end of the resonant inductor is connected with the synonym end of a primary winding of the transformer through the resonant capacitor, the homonymy end of the primary winding is connected with the middle point of the direct-current bus, and a secondary winding of the transformer is connected with the bidirectional rectifying circuit.
5. The power supply circuit according to claim 4, wherein the bidirectional rectification circuit comprises:
the bridge arm middle point of the third half-bridge circuit is connected with the homonymous end of the secondary winding, and the bridge arm middle point of the fourth half-bridge circuit is connected with the synonym end of the secondary winding.
6. The power supply circuit according to any one of claims 1 to 5, further comprising:
the first end of the bypass switch is connected with the input end of the power factor correction circuit, and the second end of the bypass switch is connected with the output end of the inverter circuit;
when the bypass switch is turned off, the power supply circuit is in a first working mode or a second working mode; when the bypass switch is turned on, the power supply circuit is in a third working mode, the first end of the bypass switch receives the input voltage, and the second end of the bypass switch provides an output voltage.
7. The power supply circuit of claim 6, further comprising:
a first main circuit switch, the first end of which is connected with the first end of the bypass switch and is used for receiving the input voltage, and the second end of which is connected with the input end of the power factor correction circuit;
and the first end of the second main circuit switch is connected with the output end of the inverter circuit, and the second end of the second main circuit switch is connected with the second end of the bypass switch and used for providing the output voltage.
8. The power supply circuit according to any one of claims 1 to 7, further comprising:
the first filter circuit is arranged at the input end of the power factor correction circuit and is used for filtering the input voltage of the power factor correction circuit;
and/or the second filter circuit is arranged at the output end of the inverter circuit and is used for filtering the output voltage of the inverter circuit.
9. A control circuit of a power supply circuit, the power supply circuit comprising: the power factor correction circuit, the direct current bus, the inverter circuit, the voltage conversion circuit, the bidirectional rectifying circuit and the battery; the first end of the power factor correction circuit is used for receiving input voltage, the second end of the power factor correction circuit is connected with the direct current bus, the third end of the power factor correction circuit is connected with the first end of the voltage conversion circuit, the first end of the inverter circuit is connected with the direct current bus, the second end of the inverter circuit is used for providing output voltage, the second end of the voltage conversion circuit is connected with the direct current bus, the third end of the voltage conversion circuit is connected with the first end of the bidirectional rectifying circuit, and the second end of the bidirectional rectifying circuit is connected with a battery; the power factor correction circuit comprises a first inductor and a first half-bridge circuit; the first half-bridge circuit is connected between the positive pole and the negative pole of the direct current bus in parallel; the first half-bridge circuit comprises a first switch and a second switch; one end of the first inductor is used for receiving the input voltage, and the other end of the first inductor is connected with the middle point of a bridge arm of the first half-bridge circuit;
the control circuit is used for controlling the first switch and the second switch; wherein, the first and the second end of the pipe are connected with each other,
in response to the power supply circuit being in a first operating mode, the control circuit controls the first switch and the second switch to be alternately turned on and off; when the first switch is turned off and the second switch is turned on, the input voltage charges the first inductor, and when the first switch is turned on and the second switch is turned off, the first inductor discharges to the direct-current bus;
in response to the power supply circuit being in a second operating mode, the control circuit controls the first switch and the second switch to alternately turn on and off; when the first switch is turned off and the second switch is turned on, the battery discharges to one pole of the direct current bus through the bidirectional rectifying circuit, the voltage conversion circuit and the second switch; when the first switch is turned on and the second switch is turned off, the battery discharges to the other pole of the direct current bus through the bidirectional rectifying circuit, the voltage conversion circuit and the second switch.
10. The control circuit of claim 9, wherein the power circuit further comprises: the first main circuit switch is connected with the bypass switch; a first terminal of the bypass switch is connected to the first terminal of the first main circuit switch and is configured to receive the input voltage, a second terminal of the first main circuit switch is connected to the power factor correction circuit, a second terminal of the bypass switch is connected to the second terminal of the second main circuit switch and is configured to provide the output voltage, and a first terminal of the second main circuit switch is connected to the inverter circuit; the control circuit is further configured to:
in response to the input voltage and the power circuit meeting a preset condition, the control circuit controls the bypass switch to be turned off and the first switch and the second switch to be turned on;
and responding to the fact that the input voltage and the power supply circuit do not accord with the preset condition, the control circuit controls the bypass switch to be switched on and the first switch and the second switch to be switched off.
11. An electronic device comprising a power supply circuit according to any one of claims 1-8 or a control circuit according to any one of claims 9-10.
CN202211239049.3A 2022-10-11 2022-10-11 Electronic device, power supply circuit and control circuit thereof Pending CN115632549A (en)

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CN202211239049.3A CN115632549A (en) 2022-10-11 2022-10-11 Electronic device, power supply circuit and control circuit thereof
PCT/CN2023/101494 WO2024078002A1 (en) 2022-10-11 2023-06-20 Electronic device, power supply circuit and control circuit thereof

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US20160001662A1 (en) * 2013-02-25 2016-01-07 Ut-Battelle, Llc Buffering energy storage systems for reduced grid and vehicle battery stress for in-motion wireless power transfer systems
CN104320048A (en) * 2014-10-31 2015-01-28 重庆大学 Photovoltaic power generation system with energy storage function and coordinated power supply method of photovoltaic power generation system
CN207926248U (en) * 2018-03-20 2018-09-28 北京新能源汽车股份有限公司 Vehicle power supply and vehicle
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CN216709034U (en) * 2021-12-29 2022-06-10 比亚迪股份有限公司 Electric automobile and high-voltage system thereof
CN115632549A (en) * 2022-10-11 2023-01-20 华为数字能源技术有限公司 Electronic device, power supply circuit and control circuit thereof

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* Cited by examiner, † Cited by third party
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WO2024078002A1 (en) * 2022-10-11 2024-04-18 华为数字能源技术有限公司 Electronic device, power supply circuit and control circuit thereof

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