WO2023240990A1 - 电源电路、电路控制方法、电源装置和电子设备 - Google Patents

电源电路、电路控制方法、电源装置和电子设备 Download PDF

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Publication number
WO2023240990A1
WO2023240990A1 PCT/CN2022/141474 CN2022141474W WO2023240990A1 WO 2023240990 A1 WO2023240990 A1 WO 2023240990A1 CN 2022141474 W CN2022141474 W CN 2022141474W WO 2023240990 A1 WO2023240990 A1 WO 2023240990A1
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Prior art keywords
circuit
inductor
capacitor
discharge
control
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PCT/CN2022/141474
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English (en)
French (fr)
Inventor
郭红光
张晨松
李建国
张锦
纪策
田晨
张加亮
Original Assignee
Oppo广东移动通信有限公司
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Publication of WO2023240990A1 publication Critical patent/WO2023240990A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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

Definitions

  • the present application relates to the field of circuit technology, and in particular to a power supply circuit, a circuit control method, a power supply device and electronic equipment.
  • PFC Power Factor Correction
  • the memory cells in the PFC circuit are larger, resulting in a larger power supply circuit.
  • this application provides a power supply circuit.
  • the power supply circuit includes: a rectifier circuit, a charge and discharge circuit, a conversion circuit and a control circuit.
  • the charge and discharge circuits are connected in parallel with the rectifier circuit and the conversion circuit respectively, and the control circuit is connected with the charge and discharge circuit. circuit connection;
  • Rectifier circuit used to convert input alternating current into direct current
  • a conversion circuit used to convert the output voltage of the rectifier circuit
  • a control circuit used to control the working mode of the charge and discharge circuit according to the output power of the rectifier circuit and the input power of the conversion circuit; wherein the working mode includes a charging mode, a discharging mode and a non-working mode;
  • the charging and discharging circuit is used to charge according to the output current of the rectifier circuit in the charging mode, discharge to the conversion circuit in the discharging mode, and stop working in the non-working mode.
  • this application also provides a circuit control method.
  • the circuit control method is applied to the power supply circuit of the first aspect.
  • the method includes:
  • the rectifier circuit converts the alternating current input from the rectifier circuit into direct current
  • the conversion circuit converts the output voltage of the rectifier circuit
  • the control circuit controls the working mode of the charging and discharging circuit according to the output power of the rectifier circuit and the input power of the conversion circuit; wherein the working mode includes charging mode, discharging mode and non-working mode;
  • the charging and discharging circuit charges according to the output current of the rectifier circuit in the charging mode, discharges to the conversion circuit in the discharging mode, and stops working in the non-operating mode.
  • the present application also provides a power supply device, including the power supply circuit of the first aspect.
  • the present application also provides an electronic device, including the power supply device of the third aspect.
  • the above-mentioned power supply circuit, circuit control method, power supply device and electronic equipment are configured by connecting the charge and discharge circuit in the power supply circuit in parallel between the rectification circuit and the conversion circuit, and controlling the circuit according to the output power of the rectification circuit and the input power of the conversion circuit. , control the working mode of the charge and discharge circuit, so that energy will flow into the charge and discharge circuit only when energy needs to be stored, and energy will flow out of the charge and discharge circuit only when energy needs to be released. It can be seen that only a small part of the energy in the power supply circuit provided by the embodiment of the present application will pass through the charge and discharge circuit. Compared with the PFC circuit in the traditional technology, the energy storage capacity requirement of the charge and discharge circuit provided by the embodiment of the present application is smaller. Therefore, the charge and discharge The smaller size of the energy storage circuit in the circuit makes the charging and discharging circuit smaller, thereby reducing the size of the power circuit.
  • Figure 1 is a schematic structural diagram of a power supply circuit in traditional technology
  • Figure 2 is a schematic structural diagram of a power circuit provided by an embodiment of the present application.
  • Figure 3 is a schematic structural diagram of a power circuit provided by another embodiment of the present application.
  • Figure 4 is a schematic structural diagram of a power circuit provided by another embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a power supply circuit provided by another embodiment of the present application.
  • Figure 6 is a schematic diagram of the measurement waveform provided by the embodiment of the present application.
  • Figure 7 is a schematic diagram 2 of the measurement waveform provided by the embodiment of the present application.
  • Figure 8 is a schematic diagram of harmonic current components provided by the embodiment of the present application.
  • Figure 9 is a schematic flowchart of a circuit control method provided by an embodiment of the present application.
  • the power circuit provided by the embodiment of the present application can be applied to electronic equipment.
  • the electronic devices involved in the embodiments of this application may include, but are not limited to: power adapters, biscuit chargers, mobile power supplies, mobile phones, laptops, tablets, smart watches, smart bracelets, sweeping machines, wireless headsets, Electric toothbrush or desktop computer.
  • PFC Power Factor Correction
  • the function of the PFC circuit is to make the power circuit (and its load circuit) behave more like a pure resistor compared to the AC power supply. Specifically, it makes the input voltage and input current of the power circuit (or the output voltage of the rectifier circuit) and output current) as much as possible in the same phase ( ⁇ ), and reduce the generation of high-order harmonics (In) as much as possible.
  • the total harmonic distortion can be expressed by the following formula (1)
  • the power factor (Power Factor, PF) can be expressed by the following formula (2).
  • THD represents total harmonic distortion
  • In represents the nth harmonic current
  • I 1 represents the fundamental current.
  • the total harmonic distortion can also be expressed by other modifications or equivalent formulas of the above formula (1), which is not limited in the embodiments of the present application.
  • PF can also be expressed by other modifications or equivalent formulas of the above formula (2), which is not limited in the embodiments of the present application.
  • FIG 1 is a schematic structural diagram of a power supply circuit in traditional technology.
  • the PFC circuit is connected in series between the rectifier circuit and the conversion circuit.
  • the two ends of the capacitor in the PFC circuit are connected in series to the two inputs of the conversion circuit. end. Since most of the energy in the power circuit needs to pass through the PFC circuit, the energy storage capacity in the PFC circuit is relatively large. Therefore, the capacitors and inductors in the PFC circuit are large, resulting in a large PFC circuit, which makes the power supply The circuit volume is larger.
  • the charge and discharge circuit in parallel between the rectifier circuit and the conversion circuit in the power circuit, and only when the need to store energy is detected, energy will flow into the charge and discharge circuit, and when the need to release energy is detected, Only then will energy flow out of the charge and discharge circuit. It can be seen that only a small part of the energy in the power supply circuit provided by the embodiment of the present application will pass through the charge and discharge circuit. Compared with the PFC circuit in the traditional technology, the energy storage capacity requirement of the charge and discharge circuit provided by the embodiment of the present application is smaller. Therefore, the charge and discharge The smaller size of the energy storage circuit in the circuit makes the charging and discharging circuit smaller, thereby reducing the size of the power circuit.
  • the switching transistors involved in the embodiments of this application may include, but are not limited to, metal-oxide-semiconductor field-effect transistors (MOS transistors) or switching transistors prepared using gallium nitride (GaN) materials.
  • MOS transistors metal-oxide-semiconductor field-effect transistors
  • GaN gallium nitride
  • MOS transistors Metal-Semiconductor Field Effect Transistor
  • HFET Heterojunction Field Effect Transistor
  • MODFET Modulated Doped Field Effect Transistor
  • the power circuit is introduced by taking each switch transistor as an NMOS transistor as an example.
  • Figure 2 is a schematic structural diagram of a power supply circuit provided by an embodiment of the present application.
  • the power supply circuit in the embodiment of the present application may include: a rectifier circuit 20, a charge and discharge circuit 21, and a conversion circuit. 22 and control circuit 23.
  • the rectifier circuit 20 and the conversion circuit 22 are connected in series
  • the charge and discharge circuit 21 are connected in parallel with the rectifier circuit 20 and the conversion circuit 22 respectively (that is, the charge and discharge circuit 21 is connected in parallel between the rectifier circuit 20 and the conversion circuit 22)
  • the control circuit 23 Connected to charge and discharge circuit 21.
  • the rectifier circuit 20 in the embodiment of the present application is used to convert the input alternating current into direct current; the conversion circuit 22 is used to convert the output voltage of the rectifier circuit to obtain the required output target voltage.
  • the conversion circuit 22 in the embodiment of the present application may include, but is not limited to, DC-to-DC (Direct Current-Direct Current, DCDC).
  • the control circuit 23 in the embodiment of the present application is used to control the working mode of the charge and discharge circuit 21 according to the output power of the rectifier circuit 20 and the input power of the conversion circuit 22, where the working mode may include: charging mode, discharging mode and non- Operating mode.
  • the charging and discharging circuit 21 in the embodiment of the present application is used for charging according to the output current of the rectifier circuit 20 in the charging mode, that is, the energy storage circuit in the charging and discharging circuit 21 stores energy; and in the discharging mode, it discharges to the conversion circuit, that is, charging The energy storage circuit in the discharge circuit 21 releases energy; it stops working in the non-working mode, that is, the energy storage circuit in the charge and discharge circuit 21 is in an open circuit state and stops working.
  • control circuit 23 can detect the output power of the rectifier circuit 20 and the input power of the conversion circuit 22 through the detection circuit.
  • the detection circuit may include, but is not limited to, a voltage sensor, a current sensor, and/or a resistor voltage divider and other detection circuits.
  • the charge and discharge circuit 21 in the embodiment of the present application may be a bidirectional buck circuit (or also called a BiBuck circuit).
  • the charging and discharging circuit 21 when the charging and discharging circuit 21 is in the charging mode, the charging and discharging circuit 21 operates in the boost mode; when the charging and discharging circuit 21 is in the discharging mode, the charging and discharging circuit 21 operates in the buck mode.
  • the control circuit 23 when the control circuit 23 determines that energy needs to be stored based on the output power of the rectifier circuit 20 and the input power of the conversion circuit 22, it can control the charge and discharge circuit 21 to be in the charging mode, so that energy can flow into the charge and discharge circuit. 21, thereby storing it into the energy storage circuit in the charge and discharge circuit 21.
  • the energy storage circuit involved in the embodiment of the present application may include, but is not limited to, an inductor and a capacitor.
  • control circuit 23 is used to control the charge and discharge circuit 21 to be in the charging mode when the output power of the rectifier circuit 20 is greater than the input power of the conversion circuit 22 , that is, when energy needs to be stored.
  • control circuit 23 is used to store energy when the output power of the rectifier circuit 20 is greater than the input power of the conversion circuit 22 and the difference between the output power and the input power is greater than or equal to the first preset difference.
  • the charging and discharging circuit 21 can be controlled to be in the charging mode.
  • control circuit 23 determines that energy needs to be stored when the output power of the rectifier circuit 20 is greater than the input power of the conversion circuit 22 as an example.
  • control circuit 23 when the control circuit 23 determines that energy needs to be released based on the output power of the rectifier circuit 20 and the input power of the conversion circuit 22, it can control the charge and discharge circuit 21 to be in the discharge mode, so as to facilitate the charge and discharge circuit 21
  • the energy storage circuit releases energy, that is, energy flows out from the charging and discharging circuit flow 21.
  • control circuit 23 is used to control the charge and discharge circuit 21 to be in the discharge mode when the output power of the rectifier circuit 20 is less than the input power of the conversion circuit 22 , that is, when energy needs to be released.
  • control circuit 23 is used to release energy when the output power of the rectifier circuit 20 is less than the input power of the conversion circuit 22 and the difference between the input power and the output power is greater than or equal to the second preset difference.
  • the charging and discharging circuit 21 can be controlled to be in the discharging mode.
  • control circuit 23 determines that energy needs to be released when the output power of the rectifier circuit 20 is less than the input power of the conversion circuit 22 as an example.
  • control circuit 23 is used to control the charge and discharge circuit 21 to be inactive when it determines that neither energy storage nor energy release is needed based on the output power of the rectifier circuit 20 and the input power of the conversion circuit 22 . mode, so that there is neither energy flowing in nor energy flowing out of the charging and discharging circuit 21 .
  • control circuit 23 is used to control the charge and discharge circuit 21 to be in the non-working mode when the output power of the rectifier circuit 20 is equal to the input power of the conversion circuit 22, that is, when there is no need to store energy or release energy.
  • control circuit 23 is used to when the absolute value of the difference between the output power of the rectifier circuit 20 and the input power of the conversion circuit 22 is less than the third preset difference, that is, there is no need to store energy or release energy.
  • the charging and discharging circuit 21 can be controlled to be in a non-working mode.
  • control circuit 23 determines that neither energy storage nor energy release is needed when the output power of the rectifier circuit 20 is equal to the input power of the conversion circuit 22 as an example.
  • the power circuit in the embodiment of the present application connects the charge and discharge circuit 21 in parallel between the rectifier circuit 20 and the conversion circuit 22, and controls the circuit 23 according to the output power of the rectifier circuit 20 and the conversion circuit 22.
  • the input power controls the working mode of the charge and discharge circuit 21, so that energy flows into the charge and discharge circuit 21 only when energy needs to be stored, and energy flows out of the charge and discharge circuit 21 only when energy needs to be released. It can be seen that only a small part of the energy in the power supply circuit provided by the embodiment of the present application will pass through the charge and discharge circuit 21.
  • the energy storage capacity requirement of the charge and discharge circuit 21 provided by the embodiment of the present application is smaller. Therefore, The size of the energy storage circuit in the charge and discharge circuit 21 is smaller, so that the size of the charge and discharge circuit 21 is smaller, thereby reducing the size of the power circuit.
  • FIG. 3 is a schematic structural diagram of a power circuit provided by another embodiment of the present application. Based on the above embodiment, the relevant contents of the charge and discharge circuit 21 are introduced in this embodiment of the present application. As shown in Figure 3, the charge and discharge circuit 21 in the embodiment of the present application may include: a selection circuit 210 and an energy storage circuit 211, wherein the selection circuit 210 is connected to the control circuit 23 and the energy storage circuit 211 respectively, and the energy storage circuit 211 is connected to The rectifier circuit 20 and the conversion circuit 22 are connected in parallel.
  • control circuit 23 is used to control the selection circuit 210 to be in the first conduction state when the output power of the rectification circuit 20 is greater than the input power of the conversion circuit 22, so that the selection circuit 210 is in the first conduction state.
  • the output current of the rectifier circuit 20 charges the energy storage circuit 211, thereby controlling the charge and discharge circuit 21 to be in the discharge mode.
  • control circuit 23 can control the on-off state of each switch in the selection circuit 210 so that the selection circuit 210 is in the first conduction state, so as to charge the energy storage circuit 211 according to the output current of the rectifier circuit 20 .
  • control circuit 23 is used to control the selection circuit 210 to be in the second conductive state when the output power of the rectifier circuit 20 is less than the input power of the conversion circuit 22, so that the selection circuit 210 is in the second conductive state.
  • the energy storage circuit 211 is discharged, thereby controlling the charge and discharge circuit 21 to be in the discharge mode.
  • control circuit 23 can control the on-off state of each switch in the selection circuit 210 so that the selection circuit 210 is in the second conduction state to control the discharge of the energy storage circuit 211.
  • control circuit 23 is used to control the selection circuit 210 to be in an off-circuit state when the output power of the rectifier circuit 20 is equal to the input power of the conversion circuit 22, thereby causing the energy storage circuit in the charge and discharge circuit 21 to 211 stops working (neither discharging nor charging), thereby controlling the charging and discharging circuit 21 to be in a non-working mode.
  • control circuit 23 can control each switch in the selection circuit 210 to be in an off state, so that the selection circuit 210 is in an off-circuit state.
  • the control circuit 23 controls the on-off state of the selection circuit 210 in the charge and discharge circuit 21 to charge the energy storage circuit 211 in the charge and discharge circuit 21 when it is necessary to store energy, or when it is necessary to release energy.
  • the energy storage circuit 211 in the charge and discharge circuit 21 discharges, so that energy flows into the charge and discharge circuit 21 only when energy needs to be stored, and energy flows out of the charge and discharge circuit 21 only when energy needs to be released. It can be seen that only a small part of the energy in the power circuit provided by the embodiment of the present application will pass through the charge and discharge circuit 21.
  • the energy storage capacity requirement of the charge and discharge circuit 21 provided by the embodiment of the present application is small. Therefore, the energy storage circuit in the charge and discharge circuit 21
  • the smaller size of 211 makes the charging and discharging circuit 21 smaller, thereby reducing the size of the power circuit.
  • FIG. 4 is a schematic structural diagram of a power supply circuit provided by another embodiment of the present application. Based on the above embodiment, the relevant contents of the energy storage circuit 211 are introduced in this embodiment of the present application.
  • the energy storage circuit 211 in the embodiment of the present application may include: an inductor L and a capacitor C1, wherein one end of the inductor L is connected to the rectifier circuit 20, and the other end of the inductor L is connected to the first end of the selection circuit 210. connection, the second end of the selection circuit 210 is connected to one end of the capacitor C1, and the third end of the selection circuit 210 and the other end of the capacitor C1 are both grounded.
  • the control circuit 23 is connected to the fourth terminal of the selection circuit 210 and is used to control the on-off state of each switch tube in the selection circuit 210 .
  • control circuit 23 is used to control the selection circuit 210 to be in the first conduction state when the output power of the rectification circuit 20 is greater than the input power of the conversion circuit 22, so that the selection circuit 210 is in the first conduction state.
  • the rectifier circuit 20 In the on state, the rectifier circuit 20 can be controlled to charge the inductor L.
  • the output current of the rectifier circuit 20 can be controlled to charge the capacitor C1.
  • control circuit 23 is used to control the selection circuit 210 to be in the first conduction state when the output power of the rectifier circuit 20 is greater than the input power of the conversion circuit 22, so that the path between the rectifier circuit 20 and the inductor L is turned on. , and close the path between the inductor L and the capacitor C, so that the output current of the rectifier circuit 20 charges the inductor L, and open the path between the inductor L and the capacitor C1 until the current of the inductor L reaches the first threshold. , so that the output current of the rectifier circuit 20 charges the capacitor C1.
  • the control circuit 23 controls the selection circuit 210 to be in the first conduction state, so that the rectifier circuit 20 charges the inductor L until the current of the inductor L reaches the first threshold, the rectifier circuit is controlled.
  • the process of charging capacitor C1 with an output current of 20 is a periodic repeating process.
  • the first threshold may vary with the output power of the rectifier circuit 20 , that is, the first threshold may be different in different cycles, or the boost current in the embodiment of the present application is dynamically adjustable.
  • control circuit 23 can detect the current of the inductor L by controlling the detection circuit.
  • control circuit 23 is used to control the selection circuit 210 to be in the second conduction state when the output power of the rectifier circuit 20 is less than the input power of the conversion circuit 22, so that the selection circuit 210 is in the second conduction state.
  • the capacitor C1 can be controlled to discharge, until the current of the inductor L reaches the second threshold, the inductor L can be controlled to discharge.
  • control circuit 23 is used to control the selection circuit 210 to be in the second conduction state when the output power of the rectifier circuit 20 is less than the input power of the conversion circuit 22, so that the path between the inductor L and the capacitor C1 is turned on, To facilitate the discharge of the capacitor C1 until the current of the inductor L reaches the second threshold, the path between the rectifier circuit 20 and the inductor L is turned on, and the path between the inductor L and the capacitor C1 is closed to facilitate the discharge of the inductor L.
  • control circuit 23 controls the selection circuit 210 to be in the second conduction state, causing the capacitor C1 to discharge until the current of the inductor L reaches the second threshold.
  • the process of controlling the discharge of the inductor L is a cycle. sexual repetition process.
  • the second threshold may vary with the output power of the rectifier circuit 20 , that is, the second threshold may be different in different cycles, or the buck current in the embodiment of the present application is dynamically adjustable.
  • control circuit 23 is used to control the selection circuit 210 to be in an off-circuit state when the output power of the rectifier circuit 20 is equal to the input power of the conversion circuit 22, thereby disconnecting the connection between the rectifier circuit 20 and the inductor L.
  • the path between the capacitor C1 and the inductor L prevents energy from entering the charge and discharge circuit 21 .
  • control circuit 23 is in the off-circuit state by controlling the selection circuit 210, so that the process of opening the path between the rectifier circuit 20 and the inductor L, and the path between the capacitor C1 and the inductor L is a periodic process. sexual repetition process.
  • the control circuit 23 controls the on-off state of the selection circuit 210 in the charge and discharge circuit 21 to charge the inductor L and the capacitor C1 in the energy storage circuit 211 when energy needs to be stored, or when energy needs to be released.
  • the inductor L and capacitor C1 in the energy storage circuit 211 are discharged, energy will flow into the energy storage circuit 211 only when energy needs to be stored, and energy will flow out of the energy storage circuit 211 only when energy needs to be released. It can be seen that only a small part of the energy in the power supply circuit provided by the embodiment of the present application passes through the energy storage circuit 211.
  • the energy storage circuit 211 provided by the embodiment of the present application requires a small energy storage capacity. Therefore, the capacitor C1 in the energy storage circuit 211 The size of the inductor L and the charging and discharging circuit 21 are small, thereby reducing the size of the power supply circuit.
  • FIG. 5 is a schematic structural diagram of a power circuit provided by another embodiment of the present application. Based on the above embodiment, the relevant content of the selection circuit 210 is introduced in this embodiment of the present application.
  • the selection circuit 210 in the embodiment of the present application may include a first switching tube Q1 and a second switching tube Q2, wherein the first end of the first switching tube Q1 is connected to the inductor L and the second switching tube Q2 respectively.
  • the second end of the first switch Q1 is connected to the capacitor C1
  • the first end of the second switch Q2 is connected to ground
  • the third end of the first switch Q1 and the third end of the second switch Q2 Both are connected to the control circuit 23.
  • control circuit 23 is used to send a first control signal to the first switching tube Q1 and/or to send a second control signal to the second switching tube Q2, where the first control signal is used to control the passage of the first switching tube Q1.
  • the second control signal is used to control the on-off state of the second switch Q2.
  • the control signal (such as the first control signal or the second control signal) involved in the embodiment of the present application may include but is not limited to a pulse width modulation (Pulse width modulation, PWM) signal.
  • PWM pulse width modulation
  • control circuit 23 is used to control the second switch Q2 to conduct when the output power of the rectifier circuit 20 is greater than the input power of the conversion circuit 22 to conduct the connection between the rectifier circuit 20 and the inductor L. path, and controlling the first switch Q1 to turn off so as to turn off the path between the inductor L and the capacitor C1, so that the output current of the rectifier circuit 20 charges the inductor L until the current of the inductor L reaches the first threshold, By controlling the first switch Q1 to be turned on and the second switch Q2 to be turned off, the path between the inductor L and the capacitor C1 is turned on, so that the output current of the rectifier circuit 20 charges the capacitor C1.
  • control circuit 23 is used to control the first switch Q1 to turn on and the second switch Q2 to turn off when the output power of the rectifier circuit 20 is less than the input power of the conversion circuit 22, so that the conduction
  • the path between the inductor L and the capacitor C1 is connected to facilitate the discharge of the capacitor C1.
  • the first switch Q1 is controlled to be turned off and the second switch Q2 is turned on, so that it is turned on.
  • the path between the rectifier circuit 20 and the inductor L and the path between the inductor L and the capacitor C1 are turned off to facilitate the discharge of the inductor L.
  • the control circuit 23 can also first control the first switch Q1 to turn off and the second switch Q2 to turn on.
  • the first switch Q1 is controlled to be turned on and the second switch Q2 is turned off, so that the connection between the inductor L and the capacitor C1 is turned on. path to facilitate the discharge of capacitor C1.
  • the control circuit 23 controls the first switch Q1 to turn off and the second switch Q2 to turn on, so that the path between the rectifier circuit 20 and the inductor L is turned on. And turn off the path between the inductor L and the capacitor C1 to facilitate the discharge of the inductor L.
  • control circuit 23 is used to control both the first switch Q1 and the second switch Q2 to turn off when the output power of the rectifier circuit 20 is equal to the input power of the conversion circuit 22, so that they are turned off.
  • the power circuit in the embodiment of the present application may also include: a decoupling circuit 24, wherein one end of the decoupling circuit is connected to the rectifier circuit 20, and the other end of the decoupling circuit 20 is grounded.
  • the decoupling circuit 24 is In order to reduce the mutual interference between the preceding and subsequent stage circuits of the decoupling circuit 20 , the preceding stage circuit of the decoupling circuit 20 may include a rectifier circuit 20 , and the subsequent stage circuit of the decoupling circuit 20 may include a conversion circuit 22 .
  • the decoupling circuit 24 may include, but is not limited to, a capacitor C2 as shown in FIG. 5 .
  • Figure 6 is a schematic diagram of the measurement waveform provided by the embodiment of the present application.
  • the control circuit 23 detects through the detection circuit that the output power of the rectifier circuit 20 is equal to the conversion circuit 22
  • the first switching tube Q1 and the second switching tube Q2 can be controlled to be turned off, so that the path between the rectifier circuit 20 and the inductor L, and the path between the capacitor C1 and the inductor L are disconnected, thereby charging
  • the discharge circuit 21 is in the non-operating mode.
  • control circuit 23 detects through the detection circuit that the output power of the rectifier circuit 20 is greater than the input power of the conversion circuit 22, it controls the second switch Q2 to turn on and the first switch Q1 Disconnect, so that the output current of the rectifier circuit 20 charges the inductor L (the current I1 of the inductor flows from left to right), until the current I1 of the inductor L increases from zero to the first threshold, by controlling the first switch tube Q1 is turned on and the second switch Q2 is turned off, so that the output current of the rectifier circuit 20 charges the capacitor C1 through the inductor L (the inductor current I1 flows from left to right).
  • the control circuit 23 controls the second switch Q2 to turn on and the first switch Q1 to turn off so that the output current of the rectifier circuit 20 charges the inductor L. ,..., cycle like this periodically until the output power of the rectifier circuit 20 is no greater than the input power of the conversion circuit 22 .
  • the voltage V1 of the capacitor C1 and the voltage V2 of the capacitor C2 will gradually increase.
  • the first threshold can change with the output power of the rectifier circuit 20, so that the boost current in the embodiment of the present application can be dynamically adjusted, so that the waveform of the output current I3 of the rectifier circuit 20 can be further optimized, so that the output current The waveform of I3 is closer to the desired waveform (such as a sine wave).
  • the control circuit 23 controls the first switch Q1 to turn on and the second switch Q2 to turn off, so as to facilitate the discharge of the capacitor C1,... , and cycle like this periodically until the output power of the rectifier circuit 20 is not less than the input power of the conversion circuit 22 .
  • the voltage V1 of the capacitor C1 will gradually become smaller, but the voltage V2 of the capacitor C2 will first gradually increase and then gradually decrease.
  • the second threshold can vary with the output power of the rectifier circuit 20, so that the buck current in the embodiment of the present application can be dynamically adjusted, so that the waveform of the output current I3 of the rectifier circuit 20 can be further optimized, so that the output current The waveform of I3 is closer to the desired waveform (such as a sine wave).
  • the first threshold in the embodiment of the present application is a positive integer
  • the second threshold is a negative integer
  • FIG. 7 is a second schematic diagram of the measurement waveform provided by the embodiment of the present application.
  • Figure 8 is a schematic diagram of the harmonic current component provided by the embodiment of the present application.
  • the charge and discharge circuit 21 It is connected in parallel between the rectifier circuit 20 and the conversion circuit 22, and then controls the on-off state of the first switching tube Q1 and the second switching tube Q2 in the selection circuit 210 through the control circuit 23, thereby adjusting the working mode of the charging and discharging circuit 21 and
  • the size of the current can not only reduce the size of the charge and discharge circuit 21, but also by controlling the working mode of the charge and discharge circuit 21, the waveform of the output current I3 of the rectifier circuit 20 can be further optimized, making the waveform of the output current I3 closer to For the desired waveform (such as sine wave), as shown in Figure 7, the measured harmonic current of the output current I3 after Fourier transformation is small.
  • the charge and discharge circuit 21 has a small capacity, so the capacitor C1 in the embodiment of the present application can be a high-voltage ceramic capacitor or a film capacitor, etc., and combined with the parallel connection of the charging and discharging circuit 21, according to the present application as shown in Figure 7
  • the voltage V1 of the capacitor C1 may vary within a wide range.
  • the voltage V1 of the capacitor C1 in the embodiment of the present application can have a large variation range, that is, the difference between its highest voltage Vmax and its lowest voltage Vmin is very large, therefore, when the same energy needs to be stored, compared to the PFC circuit energy storage capacitor, the capacity of the capacitor C1 in the embodiment of this application may be very small.
  • the variation range of the voltage V1 of the capacitor C1 in the embodiment of the present application can fluctuate from 200V to 410V, which far exceeds the fluctuation range of the energy storage capacitor of the traditional PFC circuit (usually within 10V). Therefore, the voltage can be greatly reduced.
  • the PFC circuit is connected in series between the rectifier circuit and the conversion circuit.
  • both ends of the inductor are connected in series between the rectifier circuit and the conversion circuit. Since both the "output power” current and the “energy storage” current in the power circuit need to pass through the inductor in the PFC circuit (the “release energy” current flows from the capacitor in the PFC circuit to the conversion circuit).
  • the charge and discharge circuit 21 in parallel between the rectifier circuit 20 and the conversion circuit 22 in the power circuit, the current I1 of "storing energy” and the current I2 of "releasing energy” are caused.
  • the equivalent series resistance (ESR) of the inductor L in the application embodiment can be made larger, so the volume of the inductor L can be made smaller.
  • the capacitance is positively related to the input power of the conversion circuit. For example, if the input power of the conversion circuit is 100w, then the capacity of the capacitor in the PFC circuit is 100u; if the input power of the conversion circuit is 80w, then the PFC circuit The capacity of the capacitor in is 80u.
  • the capacity of the capacitor C1 in the charge and discharge circuit can be smaller (for example, 6 u), and the capacity of the inductor L1 can also be smaller (for example, the diameter is 8 mm and the thickness is 5 mm). ), it can meet the 17625-1D equipment standard.
  • the capacitor and inductor in the charge and discharge circuit 21 in the embodiment of the present application can be smaller. Therefore, the charge and discharge circuit 21 is smaller in size, making the power circuit smaller in size. , which can provide better PFC solutions for high-power and small-sized electronic equipment.
  • the above embodiments of the present application are introduced under the condition that the input power of the conversion circuit is relatively constant. If the input power of the conversion circuit may not be constant (such as the pulsating charging of the first generation biscuit charger, etc.), Through the power supply circuit provided by the embodiments of the present application, the required "stored energy” and/or the required “released energy” can be reduced to a greater extent, so that the volume of the power supply circuit can be further reduced.
  • FIG. 9 is a schematic flowchart of a circuit control method provided by an embodiment of the present application.
  • the circuit control method of the embodiment of the present application can be applied to the power circuit provided in the above embodiment of the present application. As shown in Figure 9, the method in the embodiment of this application may include the following steps:
  • Step S901 The rectifier circuit converts the alternating current input by the rectifier circuit into direct current
  • Step S902 The conversion circuit converts the output voltage of the rectifier circuit
  • Step S903 The control circuit controls the working mode of the charge and discharge circuit according to the output power of the rectifier circuit and the input power of the conversion circuit.
  • the working modes in the embodiment of the present application include charging mode, discharging mode and non-working mode.
  • Step S904 The charging and discharging circuit charges according to the output current of the rectifier circuit in the charging mode, discharges to the conversion circuit in the discharging mode, and stops working in the non-working mode.
  • control circuit controls the working mode of the charge and discharge circuit according to the output power of the rectifier circuit and the input power of the conversion circuit, including:
  • the control circuit controls the charging and discharging circuit to be in the charging mode when the output power is greater than the input power; or, when the output power is less than the input power, controls the charging and discharging circuit to be in the discharging mode; or,
  • the control circuit controls the charge and discharge circuit to be in the discharge mode; or,
  • control circuit controls the charging and discharging circuit to be in a non-working mode.
  • the control circuit controls the charging and discharging circuit to be in the charging mode, including:
  • control selection circuit When the output power of the control circuit is greater than the input power, the control selection circuit is in the first conductive state
  • the output current of the rectifier circuit charges the energy storage circuit.
  • the selection circuit is in the first conduction state so that the output current of the rectifier circuit charges the energy storage circuit, including:
  • the selection circuit controls the rectifier circuit to charge the inductor in the first conduction state, and controls the output current of the rectifier circuit to charge the capacitor until the current of the inductor reaches the first threshold.
  • the selection circuit controls the rectifier circuit to charge the inductor in the first conduction state until the current of the inductor reaches the first threshold, and then controls the output current of the rectifier circuit to charge the capacitor, including:
  • the selection circuit conducts the path between the rectifier circuit and the inductor in the first conduction state, and turns off the path between the inductor and the capacitor, so that the output current of the rectifier circuit charges the inductor until the current of the inductor reaches the first threshold. In this case, the path between the inductor and the capacitor is opened, so that the output current of the rectifier circuit charges the capacitor.
  • the selection circuit conducts the path between the rectifier circuit and the inductor and turns off the path between the inductor and the capacitor in the first conduction state, so that the output current of the rectifier circuit charges the inductor until the inductor When the current reaches the first threshold, the path between the inductor and the capacitor is opened so that the output current of the rectifier circuit charges the capacitor, including:
  • the control circuit controls the second switch tube in the selection circuit to be turned on and the first switch tube to be turned off, so that the output current of the rectifier circuit charges the inductor until the current of the inductor reaches the first threshold. , controlling the first switch tube to be turned on and the second switch tube to be turned off, so that the output current of the rectifier circuit charges the capacitor.
  • the control circuit controls the charge and discharge circuit to be in the discharge mode, including:
  • the control selection circuit When the output power of the control circuit is less than the input power, the control selection circuit is in the second conduction state
  • the selection circuit is in the second conductive state, causing the energy storage circuit to discharge.
  • the selection circuit is in the second conductive state, causing the energy storage circuit to discharge, including:
  • the selection circuit controls the discharge of the capacitor in the second conduction state until the current of the inductor reaches the second threshold, and then controls the discharge of the inductor.
  • the selection circuit controls the discharge of the capacitor in the second conduction state until the current of the inductor reaches the second threshold, and then controls the discharge of the inductor, including:
  • the selection circuit conducts the path between the inductor and the capacitor in the second conduction state to discharge the capacitor until the current of the inductor reaches the second threshold, conducts the path between the rectifier circuit and the inductor, and turns off the inductor.
  • the path between the capacitor and the capacitor causes the inductor to discharge.
  • the selection circuit connects the path between the inductor and the capacitor in the second conduction state, causing the capacitor to discharge until the current of the inductor reaches the second threshold, and then connects the path between the rectifier circuit and the inductor. path, and closing the path between the inductor and the capacitor, causing the inductor to discharge, including:
  • the control circuit controls the first switch tube in the selection circuit to be turned on and the second switch tube to be turned off, causing the capacitor to discharge until the current of the inductor reaches the second threshold, controlling the first switch tube is turned off and the second switch tube is turned on, causing the inductor to discharge.
  • control circuit controls the charge and discharge circuit to be in a non-working mode, including:
  • the control selection circuit When the output power of the control circuit is equal to the input power, the control selection circuit is in an open circuit state
  • the energy storage circuit stops working.
  • the selection circuit is in the off-circuit state, causing the energy storage circuit to stop working, including:
  • the selection circuit breaks the path between the rectifier circuit and the inductor and the path between the capacitor and the inductor in the off-circuit state.
  • the selection circuit disconnects the path between the rectifier circuit and the inductor and the path between the capacitor and the inductor in the off-circuit state, including:
  • both the first switch tube and the second switch tube in the control selection circuit are turned off.
  • circuit control method provided by the embodiments of this application can be applied to the power circuit provided by the above embodiments of this application. Its implementation principles and technical effects are similar and will not be described again here.
  • a power supply device including the power supply circuit provided in the above embodiments of the present application. Its implementation principles and technical effects are similar and will not be described again here.
  • an electronic device including the power supply device provided in the above embodiments of the present application. Its implementation principles and technical effects are similar and will not be described again here.

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Abstract

本申请涉及一种电源电路、电路控制方法、电源装置和电子设备，通过将充放电电路并联连接到整流电路与变换电路之间，并通过控制电路根据整流电路的输出功率和变换电路的输入功率，控制充放电电路的工作模式，使得在需要存储能量时才会有能量流入充放电电路，以及在需要释放能量时才会有能量从充放电电路流出。可见，本申请实施例提供的电源电路中只有少部分能量会经过充放电电路，相对于传统技术中PFC电路，本申请实施例提供的充放电电路的储能容量需求较小，因此，充放电电路中储能电路的体积较小，使得充放电电路的体积较小，从而可以减小电源电路的体积。

Description

电源电路、电路控制方法、电源装置和电子设备
本申请引用于2022年6月17日递交的名称为“电源电路、电路控制方法、电源装置和电子设备”，申请号为2022106901218的中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请涉及电路技术领域，特别是涉及一种电源电路、电路控制方法、电源装置和电子设备。
背景技术
随着电路技术的发展，电源电路的结构和功能越来越完善。
通常情况下，电源电路中的整流电路的输出功率为随时间变化的，但电源电路中的变换电路的输入功率通常为相对恒定的，因此，整流电路与变换电路之间串联设置有功率因数校正(Power Factor Correction，PFC)电路，用于存储能量和释放能量。
但是，PFC电路中的存储单元的体积较大，导致电源电路体积较大。
发明内容
基于此，有必要针对上述技术问题，提供一种能够减小电源电路体积的电源电路、电路控制方法、电源装置和电子设备。
第一方面，本申请提供了一种电源电路，电源电路包括：整流电路、充放电电路、变换电路和控制电路，其中，充放电电路分别与整流电路和变换电路并联连接，控制电路与充放电电路连接；
整流电路，用于将输入的交流电转换为直流电；
变换电路，用于对整流电路的输出电压进行变换；
控制电路，用于根据整流电路的输出功率和变换电路的输入功率，控制充放电电路的工作模式；其中，工作模式包括充电模式、放电模式和非工作模式；
充放电电路，用于在充电模式时根据整流电路的输出电流充电、在放电模式时向变换电路放电，以及在非工作模式时停止工作。
第二方面，本申请还提供了一种电路控制方法，电路控制方法应用于上述第一方面的电源电路，方法包括：
整流电路将整流电路输入的交流电转换为直流电；
变换电路对整流电路的输出电压进行变换；
控制电路根据整流电路的输出功率和变换电路的输入功率，控制充放电电路的工作模式；其中，工作模式包括充电模式、放电模式和非工作模式；
充放电电路在充电模式时根据整流电路的输出电流充电、在放电模式时向变换电路放电，以及在非工作模式时停止工作。
第三方面，本申请还提供了一种电源装置，包括上述第一方面的电源电路。
第四方面，本申请还提供了一种电子设备，包括上述第三方面的电源装置。
上述电源电路、电路控制方法、电源装置和电子设备，通过将电源电路中的充放电电路并联连接到整流电路与变换电路之间，并通过控制电路根据整流电路的输出功率和变换电路的输入功率，控制充放电电路的工作模式，使得在需要存储能量时才会有能量流入充放电电路，以及在需要释放能量时才会有能量从充放电电路流出。可见，本申请实施例提供的电源电路中只有少部分能量会经过充放电电路，相对于传统技术中PFC电路，本申请实施例提供的充放电电路的储能容量需求较小，因此，充放电电路中储能电路的体积较小，使得充放电电路的体积较小，从而可以减小电源电路的体积。
附图说明
图1为传统技术中的电源电路的结构示意图；
图2为本申请一个实施例提供的电源电路的结构示意图；
图3为本申请另一个实施例提供的电源电路的结构示意图；
图4为本申请另一个实施例提供的电源电路的结构示意图；
图5为本申请另一个实施例提供的电源电路的结构示意图；
图6为本申请实施例提供的测量波形示意图一；
图7为本申请实施例提供的测量波形示意图二；
图8为本申请实施例提供的谐波电流分量示意图；
图9为本申请一个实施例提供的电路控制方法的流程示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
可以理解，本申请所使用的术语“第一”、“第二”等可在本文中用于描述各种元件，但这些元件不受这些术语限制。这些术语仅用于将第一个元件与另一个元件区分。
应当理解的是，术语“包括/包含”或“具有”等指定所陈述的特征、整体、步骤、操作、组件、部分或它们的组合的存在，但是不排除存在或添加一个或更多个其他特征、整体、步骤、操作、组件、部分或它们的组合的可能性。
本申请实施例提供的电源电路可以应用于电子设备中。示例性地，本申请实施例中涉及的电子设备可以包括但不限于：电源适配器、饼干充电器、移动电源、手机、笔记本电脑、平板电脑、智能手表、智能手环、扫地机器、无线耳机、电动牙刷或台式电脑。
通常情况下，电源电路中的整流电路的输出功率为随时间变化的，但电源电路中的变换电路的输入功率通常为相对恒定的，因此，整流电路与变换电路之间串联设置有功率因数校正(Power Factor Correction，PFC)电路，用于存储能量和释放能量。
PFC电路的功能是为了使电源电路(及其负载电路)的表现相对于交流电源而言更像一个纯电阻，具体来说就是使得电源电路的输入电压和输入电流(或者说整流电路的输出电压和输出电流)尽可能地同相位(φ)，并尽可能地减少高次谐波(In)的产生。其中，总谐波失真可以通过如下公式(1)表示，功率因数(Power Factor，PF)可以通过如下公式(2)表示。
Figure PCTCN2022141474-appb-000001
其中，THD代表总谐波失真，I n代表第n次谐波电流，I 1代表基波电流。当然，总谐波失真还可以通过上述公式(1)的其它变形或等效公式表示，本申请实施例中对此并不作限定。
Figure PCTCN2022141474-appb-000002
当然，PF还可以通过上述公式(2)的其它变形或等效公式表示，本申请实施例中对此并不作限定。
图1为传统技术中的电源电路的结构示意图，如图1所示，PFC电路串接在整流电路与变换电路之间，其中，PFC电路中电容的两端串接在变换电路的两个输入端。由于电源电路中的大部分能量都需要经过PFC电路，因此，PFC电路中的储能容量需求比较大，因此，PFC电路中电容和电感的体积较大，导致PFC电路体积较大，从而使得电源电路体积较大。
本申请实施例中提出通过将充放电电路并联连接到电源电路中的整流电路与变换电路之间，并在检测到需要存储能量时才会有能量流入充放电电路，以及在检测到需要释放能量时才会有能量从充放电电路流出。可见，本申请实施例提供的电源电路中只有少部分能量会经过充放电电路，相对于传统技术中PFC电路，本申请实施例提供的充放电电路的储能容量需求较小，因此，充放电电路中储能电路的体积较小，使得充放电电路的体积较小，从而可以减小电源电路的体积。
本申请实施例中涉及的各开关管可以包括但不限于金氧半场效晶体管(Metal-Oxide-Semiconductor Field-Effect Transistor，MOS管)或者利用氮化镓(GaN)材料制备出的开关管，例如，金属-半导体场效应晶体管(Metal-Semiconductor Field Effect Transistor，MESFET)、异质结场效应晶体管(HFET)或者调制掺杂场效应晶体管(MODFET)等。
为了便于理解，本申请下述实施例中以各开关管为NMOS晶体管为例对电源电路进行介绍。
在一个实施例中，图2为本申请一个实施例提供的电源电路的结构示意图，如图2所示，本申请实施例中的电源电路可以包括：整流电路20、充放电电路21、变换电路22和控制电路23。其中，整流电路20与变换电路22串联连接，充放电电路21分别与整流电路20和变换电路22并联连接(即充放电电路21并联连接到整流电路20与变换电路22之间)，控制电路23与充放电电路21连接。
本申请实施例中的整流电路20，用于将输入的交流电转换为直流电；变换电路22，用于对整流电路的输出电压进行变换，得到所需输出的目标电压。示例性地，本申请实施例中的变换电路22可以包 括但不限于直流转直流(Direct Current-Direct Current，DCDC)。
本申请实施例中的控制电路23，用于根据整流电路20的输出功率和变换电路22的输入功率，控制充放电电路21的工作模式，其中，工作模式可以包括：充电模式、放电模式和非工作模式。
本申请实施例中的充放电电路21，用于在充电模式时根据整流电路20的输出电流充电，即充放电电路21中的储能电路存储能量；在放电模式时向变换电路放电，即充放电电路21中的储能电路释放能量；在非工作模式时停止工作，即充放电电路21中的储能电路处于断路状态从而停止工作。
应理解，本申请实施例中，控制电路23可以通过检测电路检测整流电路20的输出功率和变换电路22的输入功率。示例性地，检测电路可以包括但不限于：电压传感器、电流传感器，和/或，电阻分压等检测电路。
示例性地，本申请实施例中的充放电电路21可以为双向buck电路(或者称之为BiBuck电路)。其中，充放电电路21处于充电模式时，充放电电路21工作在boost模式；充放电电路21处于放电模式时，充放电电路21工作在buck模式。
一种可能的实现方式中，控制电路23用于根据整流电路20的输出功率和变换电路22的输入功率确定需要存储能量时，可以控制充放电电路21处于充电模式，以便于能量流入充放电电路21，从而存储到充放电电路21中的储能电路。示例性地，本申请实施例中涉及的储能电路可以包括但不限于电感和电容。
示例性地，控制电路23用于在整流电路20的输出功率大于变换电路22的输入功率时，即需要存储能量时，可以控制充放电电路21处于充电模式。
又一示例性地，控制电路23用于在整流电路20的输出功率大于变换电路22的输入功率，且输出功率与输入功率的差值大于或等于第一预设差值时，即需要存储能量时，可以控制充放电电路21处于充电模式。
需要说明的是，本申请下述实施例中以控制电路23在整流电路20的输出功率大于变换电路22的输入功率时，确定需要存储能量为例进行介绍。
另一种可能的实现方式中，控制电路23用于根据整流电路20的输出功率和变换电路22的输入功率确定需要释放能量时，可以控制充放电电路21处于放电模式，以便于充放电电路21中的储能电路释放能量，即有能量从充放电电路流21流出。
示例性地，控制电路23用于在整流电路20的输出功率小于变换电路22的输入功率时，即需要释放能量时，可以控制充放电电路21处于放电模式。
又一示例性地，控制电路23用于在整流电路20的输出功率小于变换电路22的输入功率，且输入功率与输出功率的差值大于或等于第二预设差值时，即需要释放能量时，可以控制充放电电路21处于放电模式。
需要说明的是，本申请下述实施例中以控制电路23在整流电路20的输出功率小于变换电路22的输入功率时，确定需要释放能量为例进行介绍。
另一种可能的实现方式中，控制电路23用于根据整流电路20的输出功率和变换电路22的输入功率确定既不需要存储能量也不需要释放能量时，可以控制充放电电路21处于非工作模式，以便于充放电电路21中既不会有能量流入也不会有能量流出。
示例性地，控制电路23用于在整流电路20的输出功率等于变换电路22的输入功率时，即不需要存储能量也不需要释放能量时，可以控制充放电电路21处于非工作模式。
又一示例性地，控制电路23用于在整流电路20的输出功率与变换电路22的输入功率的差值的绝对值小于第三预设差值时，即不需要存储能量也不需要释放能量时，可以控制充放电电路21处于非工作模式。
需要说明的是，本申请下述实施例中以控制电路23在整流电路20的输出功率等于变换电路22的输入功率时，确定既不需要存储能量也不需要释放能量为例进行介绍。
综上所述，本申请实施例中的电源电路，通过将充放电电路21并联连接到整流电路20与变换电路22之间，并通过控制电路23根据整流电路20的输出功率和变换电路22的输入功率，控制充放电电路21的工作模式，使得在需要存储能量时才会有能量流入充放电电路21，以及在需要释放能量时才会有能量从充放电电路21流出。可见，本申请实施例提供的电源电路中只有少部分能量会经过充放电电路21，相对于传统技术中PFC电路，本申请实施例提供的充放电电路21的储能容量需求较小，因此，充放电电路21中储能电路的体积较小，使得充放电电路21的体积较小，从而可以减小电源电路的体积。
在一个实施例中，图3为本申请另一个实施例提供的电源电路的结构示意图，在上述实施例的基础上，本申请实施例中对充放电电路21的相关内容进行介绍。如图3所示，本申请实施例中的充放电电路21可以包括：选择电路210和储能电路211，其中，选择电路210分别与控制电路23和储能电路211 连接，储能电路211与整流电路20和变换电路22并联连接。
一种可能的实现方式中，控制电路23用于在整流电路20的输出功率大于变换电路22的输入功率时，可以控制选择电路210处于第一导通状态，以便于选择电路210在第一导通状态下使得整流电路20的输出电流对储能电路211充电，从而实现控制充放电电路21处于放电模式。
示例性地，控制电路23可以通过控制选择电路210中各开关管的通断状态的方式使得选择电路210处于第一导通状态，以实现根据整流电路20的输出电流对储能电路211充电。
另一种可能的实现方式中，控制电路23用于在整流电路20的输出功率小于变换电路22的输入功率时，可以控制选择电路210处于第二导通状态，以便于选择电路210在第二导通状态下使得储能电路211放电，从而实现控制充放电电路21处于放电模式。
示例性地，控制电路23可以通过控制选择电路210中各开关管的通断状态的方式使得选择电路210处于第二导通状态，以控制储能电路211放电。
另一种可能的实现方式中，控制电路23用于在整流电路20的输出功率等于变换电路22的输入功率时，可以控制选择电路210处于断路状态，从而使得充放电电路21中的储能电路211停止工作(既不放电也不充电)，从而实现控制充放电电路21处于非工作模式。
示例性地，控制电路23可以通过控制选择电路210中各开关管处于断开状态的方式，使得选择电路210处于断路状态。
本申请实施例中，控制电路23通过控制充放电电路21中的选择电路210的通断状态，实现在需要存储能量时对充放电电路21中的储能电路211充电，或者在需要释放能量时充放电电路21中的储能电路211放电，从而使得在需要存储能量时才会有能量流入充放电电路21，以及在需要释放能量时才会有能量从充放电电路21流出。可见，本申请实施例提供的电源电路中只有少部分能量会经过充放电电路21，本申请实施例提供的充放电电路21的储能容量需求较小，因此，充放电电路21中储能电路211的体积较小，使得充放电电路21的体积较小，从而可以减小电源电路的体积。
在一个实施例中，图4为本申请另一个实施例提供的电源电路的结构示意图，在上述实施例的基础上，本申请实施例中对储能电路211的相关内容进行介绍。如图4所示，本申请实施例中的储能电路211可以包括：电感L和电容C1，其中，电感L的一端与整流电路20连接，电感L的另一端与选择电路210的第一端连接，选择电路210的第二端与电容C1的一端连接，选择电路210的第三端和电容C1的另一端均接地。应理解，控制电路23与选择电路210的第四端连接，用于控制选择电路210中的各开关管的通断状态。
一种可能的实现方式中，控制电路23用于在整流电路20的输出功率大于变换电路22的输入功率时，可以控制选择电路210处于第一导通状态，从而使得选择电路210在第一导通状态下可以控制整流电路20对电感L充电，直至电感L的电流达到第一阈值的情况下，可以控制整流电路20的输出电流对电容C1充电。
示例性地，控制电路23用于在整流电路20的输出功率大于变换电路22的输入功率时，通过控制选择电路210处于第一导通状态，使得导通整流电路20与电感L之间的通路，以及关断电感L与电容C之间的通路，以便于整流电路20的输出电流对电感L充电，直至电感L的电流达到第一阈值的情况下导通电感L与电容C1之间的通路，以便于整流电路20的输出电流对电容C1充电。
需要说明的是，本实现方式中，控制电路23通过控制选择电路210处于第一导通状态，使得整流电路20对电感L充电，直至电感L的电流达到第一阈值的情况下，控制整流电路20的输出电流对电容C1充电的过程为周期性重复过程。其中，第一阈值可以为随整流电路20的输出功率大小而变化，即第一阈值在不同周期下可能并不相同，或者说本申请实施例中的boost电流动态可调。
应理解，本申请实施例中，控制电路23可以通过控制检测电路检测电感L的电流。
另一种可能的实现方式中，控制电路23用于在整流电路20的输出功率小于变换电路22的输入功率时，可以控制选择电路210处于第二导通状态，从而使得选择电路210在第二导通状态下可以控制电容C1放电，直至电感L的电流达到第二阈值的情况下，可以控制电感L放电。
示例性地，控制电路23用于在整流电路20的输出功率小于变换电路22的输入功率时，通过控制选择电路210处于第二导通状态，使得导通电感L与电容C1之间的通路，以便于电容C1放电，直至电感L的电流达到第二阈值的情况下导通整流电路20与电感L之间的通路，以及关断电感L与电容C1之间的通路，以便于电感L放电。
需要说明的是，本实现方式中，控制电路23通过控制选择电路210处于第二导通状态，使得电容C1放电，直至电感L的电流达到第二阈值的情况下控制电感L放电的过程为周期性重复过程。其中，第二阈值可以为随整流电路20的输出功率大小而变化，即第二阈值在不同周期下可能并不相同，或者说本申请实施例中的buck电流动态可调。
另一种可能的实现方式中，控制电路23用于在整流电路20的输出功率等于变换电路22的输入功率时，可以控制选择电路210处于断路状态，从而断开整流电路20与电感L之间的通路，以及电容C1与电感L之间的通路，使得不会有能量进入充放电电路21。
需要说明的是，本实现方式中，控制电路23通过控制选择电路210处于断路状态，使得断开整流电路20与电感L之间的通路，以及电容C1与电感L之间的通路的过程为周期性重复过程。
本申请实施例中，控制电路23通过控制充放电电路21中的选择电路210的通断状态，实现在需要存储能量时对储能电路211中的电感L和电容C1充电，或者在需要释放能量时储能电路211中的电感L和电容C1放电，从而使得在需要存储能量时才会有能量流入储能电路211，以及在需要释放能量时才会有能量从储能电路211流出。可见，本申请实施例提供的电源电路中只有少部分能量会经过储能电路211，本申请实施例提供的储能电路211的储能容量需求较小，因此，储能电路211中的电容C1和电感L的体积较小，使得充放电电路21的体积较小，从而可以减小电源电路的体积。
在一个实施例中，图5为本申请另一个实施例提供的电源电路的结构示意图，在上述实施例的基础上，本申请实施例中对选择电路210的相关内容进行介绍。如图5所示，本申请实施例中的选择电路210可以包括第一开关管Q1和第二开关管Q2，其中，第一开关管Q1的第一端分别与电感L和第二开关管Q2的第二端连接，第一开关管Q1的第二端与电容C1连接，第二开关管Q2的第一端接地，第一开关管Q1的第三端和第二开关管Q2的第三端均与控制电路23连接。
应理解，控制电路23用于向第一开关管Q1发送第一控制信号和/或向第二开关管Q2发送第二控制信号，其中，第一控制信号用于控制第一开关管Q1的通断状态，第二控制信号用于控制第二开关管Q2的通断状态。示例性地，本申请实施例中涉及的控制信号(例如第一控制信号或者第二控制信号)可以包括但不限于脉冲宽度调制(Pulse width modulation，PWM)信号。
一种可能的实现方式中，控制电路23用于在整流电路20的输出功率大于变换电路22的输入功率时，通过控制第二开关管Q2导通使得导通整流电路20与电感L之间的通路，以及控制第一开关管Q1断开使得关断电感L与电容C1之间的通路，以便于整流电路20的输出电流对电感L充电，直至电感L的电流达到第一阈值的情况下，通过控制第一开关管Q1导通以及第二开关管Q2断开，使得导通电感L与电容C1之间的通路，以便于整流电路20的输出电流对电容C1充电。
另一种可能的实现方式中，控制电路23用于在整流电路20的输出功率小于变换电路22的输入功率时，通过控制第一开关管Q1导通以及第二开关管Q2断开，使得导通电感L与电容C1之间的通路，以便于电容C1放电，直至电感的电流达到第二阈值的情况下，通过控制第一开关管Q1断开以及第二开关管Q2导通，使得导通整流电路20与电感L之间的通路以及关断电感L与电容C1之间的通路，以便于电感L放电。
需要说明的是，控制电路23用于在整流电路20的输出功率小于变换电路22的输入功率时，也可以先通过控制第一开关管Q1断开以及第二开关管Q2导通，使得导通整流电路20与电感L之间的通路，直至电感的电流达到第三阈值时，通过控制第一开关管Q1导通以及第二开关管Q2断开，使得导通电感L与电容C1之间的通路，以便于电容C1放电。进一步地，直至电感的电流达到第二阈值的情况下，控制电路23再通过控制第一开关管Q1断开以及第二开关管Q2导通，使得导通整流电路20与电感L之间的通路以及关断电感L与电容C1之间的通路，以便于电感L放电。
另一种可能的实现方式中，控制电路23用于在整流电路20的输出功率等于变换电路22的输入功率时，通过控制第一开关管Q1和第二开关管Q2均断开，使得断开整流电路20与电感L之间的通路，以及电容C1与电感L之间的通路。
为了便于理解，本申请下述实施例中，对电源电路的工作过程进行介绍。
如图5所示，本申请实施例中的电源电路还可以包括：去耦电路24，其中，去耦电路的一端与整流电路20连接，去耦电路20的另一端接地，去耦电路24用于减小去耦电路20的前后级电路之间的相互干扰，其中，去耦电路20的前级电路可以包括整流电路20，去耦电路20的后级电路可以包括变换电路22。示例性地，去耦电路24可以包括但不限于：如图5所示的电容C2。
图6为本申请实施例提供的测量波形示意图一，如图6所示，1)假设在时间段t1与t2之间，控制电路23通过检测电路检测到整流电路20的输出功率等于变换电路22的输入功率时，可以通过控制第一开关管Q1和第二开关管Q2均断开，使得断开整流电路20与电感L之间的通路，以及电容C1与电感L之间的通路，从而充放电电路21处于非工作模式。
2)假设在时间段t2与t3之间，控制电路23通过检测电路检测到整流电路20的输出功率大于变换电路22的输入功率时，通过控制第二开关管Q2导通以及第一开关管Q1断开，以便于整流电路20的输出电流对电感L充电(电感的电流I1从左向右流)，直至电感L的电流I1从零增加到第一阈值的情况下，通过控制第一开关管Q1导通以及第二开关管Q2断开，以便于整流电路20的输出电流通过电 感L对电容C1充电(电感的电流I1从左向右流)。进一步地，在电感的电流I1从第一阈值减小到零时，控制电路23通过控制第二开关管Q2导通以及第一开关管Q1断开以便于整流电路20的输出电流对电感L充电，……，如此周期性地循环直至整流电路20的输出功率不大于变换电路22的输入功率为止。如图6所示，在充放电电路21处于充电模式时，电容C1的电压V1和电容C2的电压V2会逐渐变大。
应理解，第一阈值可以为随整流电路20的输出功率大小而变化，使得本申请实施例中的boost电流动态可调，以便于可以更加优化整流电路20的输出电流I3的波形，使得输出电流I3的波形更接近于期望波形(如正弦波)。
3)假设在时间段t3与t4之间，控制电路23通过检测电路检测到整流电路20的输出功率等于变换电路22的输入功率时，可以通过控制第一开关管Q1和第二开关管Q2均断开，使得断开整流电路20与电感L之间的通路，以及电容C1与电感L之间的通路，从而充放电电路21处于非工作模式。如图6所示，在充放电电路21处于非工作模式时，电容C1的电压V1保持不变，但电容C2的电压V2会逐渐变小。
4)假设在时间段t4与t5之间，控制电路23通过检测电路检测到整流电路20的输出功率小于变换电路22的输入功率时，通过控制第一开关管Q1导通以及第二开关管Q2断开，以便于电容C1放电(电感的电流I2从右向左流)，直至电感L的电流I2从零“增加到”第二阈值的情况下，通过控制第一开关管Q1断开以及第二开关管Q2导通，以便于电感L放电(电感的电流I2从右向左流)。进一步地，在电感L的电流I2从第二阈值“减小到”零时，控制电路23通过控制第一开关管Q1导通以及第二开关管Q2断开，以便于电容C1放电，……，如此周期性地循环直至整流电路20的输出功率不小于变换电路22的输入功率为止。如图6所示，在充放电电路21处于放电模式时，电容C1的电压V1保会逐渐变小，但电容C2的电压V2会先逐渐变大然后逐渐变小。
应理解，第二阈值可以为随整流电路20的输出功率大小而变化，使得本申请实施例中的buck电流动态可调，以便于可以更加优化整流电路20的输出电流I3的波形，使得输出电流I3的波形更接近于期望波形(如正弦波)。
应理解，若以电感电流从左向右流动为正电流，则本申请实施例中的第一阈值为正整数，第二阈值为负整数。
需要说明的是，后面时间段的工作过程与时间段t1-t5的过程类似，此处不再一一介绍。
图7为本申请实施例提供的测量波形示意图二，图8为本申请实施例提供的谐波电流分量示意图，结合图7和图8所示，本申请实施例中，通过将充放电电路21并联连接到整流电路20与变换电路22之间，然后通过控制电路23控制选择电路210中第一开关管Q1和第二开关管Q2的通断状态的方式，调节充放电电路21的工作模式和电流大小，不仅可以减小充放电电路21的体积，而且还可以通过对充放电电路21的工作模式的控制，可以更加优化整流电路20的输出电流I3的波形，使得输出电流I3的波形更接近于期望波形(如正弦波)，如图7所示，输出电流I3通过傅里叶变换后测量的谐波电流较小。
综上，本申请实施例中只有少部分能量会经过充放电电路21，相对于传统技术中PFC电路，本申请实施例提供的充放电电路21的储能容量需求较小，因此，充放电电路中21的电容C1的容量较小，从而本申请实施例中的电容C1可以选择耐高压的陶瓷电容或薄膜电容等，并且结合将充放电电路21并联连接的方式，根据图7所示本申请实施例中电容C1的电压V1的变化范围可以很大。
应理解，由于整流电路20的输出功率随工频周期规律地变化，变换电路22的输入功率相对恒定，因此，在每半个工频周期内所需存储和释放的能量为定值ΔW＝1/2*C*(Vmax 2-Vmin 2)。
由于本申请实施例中电容C1的电压V1的变化范围可以很大，即其最高电压Vmax与最低电压Vmin之间的差值很大，因此，当需要存储相同的能量时，相对于PFC电路中的储能电容，本申请实施例中的电容C1的容量可以很小。
例如，本申请实施例中电容C1的电压V1的变化范围可以在200V到410V波动，远远超过了传统PFC电路的储能电容的波动范围(通常在10V以内)，因此，可以大幅度减小C1的电容容量。
传统技术中PFC电路串接在整流电路与变换电路之间，其中，PFC电路中电感的两端串接在整流电路与变换电路之间。由于电源电路中的“输出功率”的电流和“储存能量”的电流都需要经过PFC电路中的电感(“释放能量”的电流从PFC电路中的电容流向变换电路)。相比之下，本申请实施例中，通过将充放电电路21并联连接到电源电路中的整流电路20与变换电路22之间，使得“存储能量”的电流I1和“释放能量”的电流I2会经过充放电电路21中的电感L，但“输出功率”的电流I4不会经过充放电电路21，即本申请实施例中流过电感L的电流减小，因此，在同样的损耗下，本申请实施例中的电感L的串联等效电阻(Equivalent Series Resistance，ESR)可以做的更大，从而电感L的体积可以做的更小。
传统PFC电路中，电容容量和变换电路的输入功率成正相关，例如，若变换电路的输入功率为100w， 则PFC电路中的电容的容量为100u；若变换电路的输入功率为80w，则PFC电路中的电容的容量为80u。相比之下，通过本申请实施例提供的电源电路，充放电电路中的电容C1的容量可以较小(例如6u)，以及电感L1的容量也可以较小(例如直径为8mm和厚度为5mm)，便可以实现满足17625-1D类设备标准。
综上所述，相对于传统PFC电路，本申请实施例中的充放电电路21中的电容和电感的体积可以较小，因此，充放电电路21的体积较小，使得电源电路的体积较小，从而可以为大功率和小体积的电子设备提供更好的PFC方案。
应理解，本申请上述实施例中以变换电路的输入功率为相对恒定的情形进行介绍的，如果针对变换电路的输入功率可以不恒定的情形(例如饼干充电器第一代的脉动充电等)，通过本申请实施例提供的电源电路，可以更大程度上减小所需“存储的能量”和/或所需“释放能量”，从而可以使得电源电路的体积可以进一步地减小。
在一个实施例中，图9为本申请一个实施例提供的电路控制方法的流程示意图，本申请实施例的电路控制方法可以应用于本申请上述实施例中提供的电源电路。如图9所示，本申请实施例的方法可以包括以下步骤：
步骤S901、整流电路将整流电路输入的交流电转换为直流电；
步骤S902、变换电路对整流电路的输出电压进行变换；
步骤S903、控制电路根据整流电路的输出功率和变换电路的输入功率，控制充放电电路的工作模式。
本申请实施例中的工作模式包括充电模式、放电模式和非工作模式。
步骤S904、充放电电路在充电模式时根据整流电路的输出电流充电、在放电模式时向变换电路放电，以及在非工作模式时停止工作。
在一个实施例中，控制电路根据整流电路的输出功率和变换电路的输入功率，控制充放电电路的工作模式，包括：
控制电路在输出功率大于输入功率时，控制充放电电路处于充电模式；或者，在输出功率小于输入功率时，控制充放电电路处于放电模式；或者，
控制电路在输出功率小于输入功率时，控制充放电电路处于放电模式；或者，
控制电路在输出功率等于输入功率时，控制充放电电路处于非工作模式。
在一个实施例中，控制电路在输出功率大于输入功率时，控制充放电电路处于充电模式，包括：
控制电路在输出功率大于输入功率时，控制选择电路处于第一导通状态；
选择电路在第一导通状态下，使得整流电路的输出电流对储能电路充电。
在一个实施例中，选择电路在第一导通状态下，使得整流电路的输出电流对储能电路充电，包括：
选择电路在第一导通状态下控制整流电路对电感充电，直至电感的电流达到第一阈值的情况下，控制整流电路的输出电流对电容充电。
在一个实施例中，选择电路在第一导通状态下控制整流电路对电感充电，直至电感的电流达到第一阈值的情况下，控制整流电路的输出电流对电容充电，包括：
选择电路在第一导通状态下导通整流电路与电感之间的通路，以及关断电感与电容之间的通路，使得整流电路的输出电流对电感充电，直至电感的电流达到第一阈值的情况下，导通电感与电容之间的通路，使得整流电路的输出电流对电容充电。
在一个实施例中，选择电路在第一导通状态下导通整流电路与电感之间的通路，以及关断电感与电容之间的通路，使得整流电路的输出电流对电感充电，直至电感的电流达到第一阈值的情况下，导通电感与电容之间的通路，使得整流电路的输出电流对电容充电，包括：
控制电路在输出功率大于输入功率时，控制选择电路中的第二开关管导通以及第一开关管断开，使得整流电路的输出电流对电感充电，直至电感的电流达到第一阈值的情况下，控制第一开关管导通以及第二开关管断开，使得整流电路的输出电流对电容充电。
在一个实施例中，控制电路在输出功率小于输入功率时，控制充放电电路处于放电模式，包括：
控制电路在输出功率小于输入功率时，控制选择电路处于第二导通状态；
选择电路在第二导通状态下，使得储能电路放电。
在一个实施例中，选择电路在第二导通状态下，使得储能电路放电，包括：
选择电路在第二导通状态下控制电容放电，直至电感的电流达到第二阈值的情况下，控制电感放电。
在一个实施例中，选择电路在第二导通状态下控制电容放电，直至电感的电流达到第二阈值的情况下，控制电感放电，包括：
选择电路在第二导通状态下导通电感与电容之间的通路，使得电容放电，直至电感的电流达到第二阈值的情况下，导通整流电路与电感之间的通路，以及关断电感与电容之间的通路，使得电感放电。
在一个实施例中，选择电路在第二导通状态下导通电感与电容之间的通路，使得电容放电，直至电感的电流达到第二阈值的情况下，导通整流电路与电感之间的通路，以及关断电感与电容之间的通路，使得电感放电，包括：
控制电路在输出功率小于输入功率时，控制选择电路中的第一开关管导通以及第二开关管断开，使得电容放电，直至电感的电流达到第二阈值的情况下，控制第一开关管断开以及第二开关管导通，使得电感放电。
在一个实施例中，控制电路在输出功率等于输入功率时，控制充放电电路处于非工作模式，包括：
控制电路在输出功率等于输入功率时，控制选择电路处于断路状态；
选择电路在断路状态下，使得储能电路停止工作。
在一个实施例中，选择电路在断路状态下，使得储能电路停止工作，包括：
选择电路在断路状态下断开整流电路与电感之间的通路，以及电容与电感之间的通路。
在一个实施例中，选择电路在断路状态下断开整流电路与电感之间的通路，以及电容与电感之间的通路，包括：
控制电路在输出功率等于输入功率时，控制选择电路中的第一开关管和第二开关管均断开。
本申请实施例提供的电路控制方法可以应用于本申请上述实施例提供的电源电路中，其实现原理和技术效果类似，此处不再赘述。
在一个实施例中，提供了一种电源装置，包括本申请上述实施例中提供的电源电路，其实现原理和技术效果类似，此处不再赘述。
在一个实施例中，提供了一种电子设备，包括本申请上述实施例中提供的电源装置，其实现原理和技术效果类似，此处不再赘述。
以上实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请的保护范围应以所附权利要求为准。

Claims (22)

  1. 一种电源电路，其特征在于，所述电源电路包括：整流电路、充放电电路、变换电路和控制电路，其中，所述充放电电路分别与所述整流电路和所述变换电路并联连接，所述控制电路与所述充放电电路连接；
    所述整流电路，用于将输入的交流电转换为直流电；
    所述变换电路，用于对所述整流电路的输出电压进行变换；
    所述控制电路，用于根据所述整流电路的输出功率和所述变换电路的输入功率，控制所述充放电电路的工作模式；其中，所述工作模式包括充电模式、放电模式和非工作模式；
    所述充放电电路，用于在所述充电模式时根据所述整流电路的输出电流充电、在所述放电模式时向所述变换电路放电，以及在所述非工作模式时停止工作。
  2. 根据权利要求1所述的电路，其特征在于，所述控制电路用于：在所述输出功率大于所述输入功率时，控制所述充放电电路处于充电模式；或者，
    在所述输出功率小于所述输入功率时，控制所述充放电电路处于放电模式；或者，
    在所述输出功率等于所述输入功率时，控制所述充放电电路处于非工作模式。
  3. 根据权利要求2所述的电路，其特征在于，所述充放电电路包括：选择电路和储能电路，所述选择电路分别与所述控制电路和所述储能电路连接，所述储能电路与所述整流电路和所述变换电路并联连接；
    所述控制电路，用于在所述输出功率大于所述输入功率时，控制所述选择电路处于第一导通状态；在所述输出功率小于所述输入功率时，控制所述选择电路处于第二导通状态；在所述输出功率等于所述输入功率时，控制所述选择电路处于断路状态；
    所述选择电路，用于在所述第一导通状态下，使得所述整流电路的输出电流对所述储能电路充电；在所述第二导通状态下，使得所述储能电路放电；在所述断路状态下，使得所述储能电路停止工作。
  4. 根据权利要求3所述的电路，其特征在于，所述储能电路包括电感和电容，所述电感的一端与所述整流电路连接，所述电感的另一端与所述选择电路的第一端连接，所述选择电路的第二端与所述电容的一端连接，所述选择电路的第三端和所述电容的另一端均接地；
    所述选择电路，用于在所述第一导通状态下控制所述整流电路对所述电感充电，直至所述电感的电流达到第一阈值的情况下，控制所述整流电路的输出电流对所述电容充电；或者，
    所述选择电路，用于在所述第二导通状态下控制所述电容放电，直至所述电感的电流达到第二阈值的情况下，控制所述电感放电；或者，
    所述选择电路，用于在所述断路状态下断开所述整流电路与所述电感之间的通路，以及所述电容与所述电感之间的通路。
  5. 根据权利要求4所述的电路，其特征在于，所述选择电路，用于在所述第一导通状态下导通所述整流电路与所述电感之间的通路，以及关断所述电感与所述电容之间的通路，使得所述整流电路的输出电流对所述电感充电，直至所述电感的电流达到所述第一阈值的情况下，导通所述电感与所述电容之间的通路，使得所述整流电路的输出电流对所述电容充电；或者，
    所述选择电路，用于在所述第二导通状态下导通所述电感与所述电容之间的通路，使得所述电容放电，直至所述电感的电流达到所述第二阈值的情况下，导通所述整流电路与所述电感之间的通路，以及关断所述电感与所述电容之间的通路，使得所述电感放电。
  6. 根据权利要求5所述的电路，其特征在于，所述选择电路包括第一开关管和第二开关管，其中，所述第一开关管的第一端分别与所述电感和所述第二开关管的第二端连接，所述第一开关管的第二端与所述电容连接，所述第二开关管的第一端接地，所述第一开关的第三端和所述第二开关的第三端均与所述控制电路连接；
    所述控制电路，用于在所述输出功率大于所述输入功率时，控制所述第二开关管导通以及所述第一开关管断开，使得所述整流电路的输出电流对所述电感充电，直至所述电感的电流达到所述第一阈值的情况下，控制所述第一开关管导通以及所述第二开关管断开，使得所述整流电路的输出电流对所述电容充电；或者，
    所述控制电路，用于在所述输出功率小于所述输入功率时，控制所述第一开关管导通以及所述第二开关管断开，使得所述电容放电，直至所述电感的电流达到所述第二阈值的情况下，控制所述第一开关管断开以及所述第二开关管导通，使得所述电感放电；或者，
    所述控制电路，用于在所述输出功率等于所述输入功率时，控制所述第一开关管和所述第二开关管均断开。
  7. 根据权利要求1-6中任一项所述的电路，其特征在于，所述电源电路还包括：去耦电路，所述 去耦电路的一端与所述整流电路连接，所述去耦电路的另一端接地；
    所述去耦电路，用于减小所述整流电路与所述变换电路之间的相互干扰。
  8. 一种电路控制方法，其特征在于，所述电路控制方法应用于权利要求1-7中任一项所述的电源电路，所述方法包括：
    整流电路将所述整流电路输入的交流电转换为直流电；
    变换电路对所述整流电路的输出电压进行变换；
    控制电路根据所述整流电路的输出功率和所述变换电路的输入功率，控制充放电电路的工作模式；其中，所述工作模式包括充电模式、放电模式和非工作模式；
    所述充放电电路在所述充电模式时根据所述整流电路的输出电流充电、在所述放电模式时向所述变换电路放电，以及在所述非工作模式时停止工作。
  9. 根据权利要求8所述的方法，其特征在于，所述控制电路根据所述整流电路的输出功率和所述变换电路的输入功率，控制所述充放电电路的工作模式，包括：
    所述控制电路在所述输出功率大于所述输入功率时，控制所述充放电电路处于充电模式；或者，
    所述控制电路在所述输出功率小于所述输入功率时，控制所述充放电电路处于放电模式；或者，
    所述控制电路在所述输出功率等于所述输入功率时，控制所述充放电电路处于非工作模式。
  10. 根据权利要求9所述的方法，其特征在于，所述控制电路在所述输出功率大于所述输入功率时，控制所述充放电电路处于充电模式，包括：
    所述控制电路在所述输出功率大于所述输入功率时，控制选择电路处于第一导通状态；
    所述选择电路在所述第一导通状态下，使得所述整流电路的输出电流对储能电路充电。
  11. 根据权利要求10所述的方法，其特征在于，所述选择电路在所述第一导通状态下，使得所述整流电路的输出电流对储能电路充电，包括：
    所述选择电路在所述第一导通状态下控制所述整流电路对电感充电，直至所述电感的电流达到第一阈值的情况下，控制所述整流电路的输出电流对电容充电。
  12. 根据权利要求11所述的方法，其特征在于，所述选择电路在所述第一导通状态下控制所述整流电路对电感充电，直至所述电感的电流达到第一阈值的情况下，控制所述整流电路的输出电流对电容充电，包括：
    所述选择电路在所述第一导通状态下导通所述整流电路与所述电感之间的通路，以及关断所述电感与所述电容之间的通路，使得所述整流电路的输出电流对所述电感充电，直至所述电感的电流达到所述第一阈值的情况下，导通所述电感与所述电容之间的通路，使得所述整流电路的输出电流对所述电容充电。
  13. 根据权利要求12所述的方法，其特征在于，所述选择电路在所述第一导通状态下导通所述整流电路与所述电感之间的通路，以及关断所述电感与所述电容之间的通路，使得所述整流电路的输出电流对所述电感充电，直至所述电感的电流达到所述第一阈值的情况下，导通所述电感与所述电容之间的通路，使得所述整流电路的输出电流对所述电容充电，包括：
    所述控制电路在所述输出功率大于所述输入功率时，控制所述选择电路中的第二开关管导通以及第一开关管断开，使得所述整流电路的输出电流对所述电感充电，直至所述电感的电流达到所述第一阈值的情况下，控制所述第一开关管导通以及所述第二开关管断开，使得所述整流电路的输出电流对所述电容充电。
  14. 根据权利要求9所述的方法，其特征在于，所述控制电路在所述输出功率小于所述输入功率时，控制所述充放电电路处于放电模式，包括：
    所述控制电路在所述输出功率小于所述输入功率时，控制选择电路处于第二导通状态；
    所述选择电路在所述第二导通状态下，使得储能电路放电。
  15. 根据权利要求14所述的方法，其特征在于，所述选择电路在所述第二导通状态下，使得储能电路放电，包括：
    所述选择电路在所述第二导通状态下控制电容放电，直至电感的电流达到第二阈值的情况下，控制所述电感放电。
  16. 根据权利要求15所述的方法，其特征在于，所述选择电路在所述第二导通状态下控制电容放电，直至电感的电流达到第二阈值的情况下，控制所述电感放电，包括：
    所述选择电路在所述第二导通状态下导通所述电感与所述电容之间的通路，使得所述电容放电，直至所述电感的电流达到所述第二阈值的情况下，导通所述整流电路与所述电感之间的通路，以及关断所述电感与所述电容之间的通路，使得所述电感放电。
  17. 根据权利要求16所述的方法，其特征在于，所述选择电路在所述第二导通状态下导通所述电 感与所述电容之间的通路，使得所述电容放电，直至所述电感的电流达到所述第二阈值的情况下，导通所述整流电路与所述电感之间的通路，以及关断所述电感与所述电容之间的通路，使得所述电感放电，包括：
    所述控制电路在所述输出功率小于所述输入功率时，控制所述选择电路中的第一开关管导通以及第二开关管断开，使得所述电容放电，直至所述电感的电流达到所述第二阈值的情况下，控制所述第一开关管断开以及所述第二开关管导通，使得所述电感放电。
  18. 根据权利要求9所述的方法，其特征在于，所述控制电路在所述输出功率等于所述输入功率时，控制所述充放电电路处于非工作模式，包括：
    所述控制电路在所述输出功率等于所述输入功率时，控制选择电路处于断路状态；
    所述选择电路在所述断路状态下，使得储能电路停止工作。
  19. 根据权利要求18所述的方法，其特征在于，所述选择电路在所述断路状态下，使得储能电路停止工作，包括：
    所述选择电路在所述断路状态下断开所述整流电路与电感之间的通路，以及电容与所述电感之间的通路。
  20. 根据权利要求19所述的方法，其特征在于，所述选择电路在所述断路状态下断开所述整流电路与电感之间的通路，以及电容与所述电感之间的通路，包括：
    所述控制电路在所述输出功率等于所述输入功率时，控制所述选择电路中的第一开关管和第二开关管均断开。
  21. 一种电源装置，其特征在于，包括如权利要求1-7中任一项所述的电源电路。
  22. 一种电子设备，其特征在于，包括如权利要求21所述的电源装置。
PCT/CN2022/141474 2022-06-17 2022-12-23 电源电路、电路控制方法、电源装置和电子设备 WO2023240990A1 (zh)

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