WO2022261914A1 - Procédé de commande d'alimentation électrique de résonance, dispositif de commande de conversion de résonance et support de stockage - Google Patents

Procédé de commande d'alimentation électrique de résonance, dispositif de commande de conversion de résonance et support de stockage Download PDF

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Publication number
WO2022261914A1
WO2022261914A1 PCT/CN2021/100743 CN2021100743W WO2022261914A1 WO 2022261914 A1 WO2022261914 A1 WO 2022261914A1 CN 2021100743 W CN2021100743 W CN 2021100743W WO 2022261914 A1 WO2022261914 A1 WO 2022261914A1
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Prior art keywords
power supply
state
resonant
resonant power
enter
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PCT/CN2021/100743
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English (en)
Chinese (zh)
Inventor
代佳乐
杨学钢
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华为技术有限公司
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Priority to PCT/CN2021/100743 priority Critical patent/WO2022261914A1/fr
Priority to CN202180006442.5A priority patent/CN115885461A/zh
Publication of WO2022261914A1 publication Critical patent/WO2022261914A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps

Definitions

  • the present application relates to the technical field of resonant power supplies, in particular to a method for controlling a resonant power supply, a resonant conversion controller and a storage medium.
  • a switched capacitor circuit is a circuit that includes switches and capacitors controlled by a clock signal.
  • a switched capacitor circuit can adjust and convert the input voltage from the power supply during operation, and give the adjusted output voltage to the load for the load. use.
  • the switched capacitor circuit can achieve high conversion efficiency when the ratio of input and output voltages is a fixed ratio.
  • the input voltage or output voltage changes, such as the battery powering the chip of a mobile phone
  • the input voltage changes with the discharge of the battery
  • the ratio of the input voltage to the output voltage will change with the change of the input voltage , that is, when the ratio between the input voltage and the output voltage is not fixed, the conversion efficiency of the power supply will be reduced.
  • Embodiments of the present application provide a control method for a resonant power supply, a resonant conversion controller, and a storage medium.
  • the embodiments of the present application can effectively improve power conversion efficiency, realize gain adjustment, and enhance dynamic response capability.
  • an embodiment of the present application provides a method for controlling a resonant power supply, the resonant power supply includes an inductor and a first capacitor, the control method includes: controlling the resonant power supply to enter a first state, wherein, in the In the first state, the resonant power supply is used to perform power conversion on the voltage at the input terminal and supply power to the output terminal, and to charge the inductor and the first capacitor; control the resonant power supply to enter the second state, wherein, In the second state, the resonant power supply supplies power to the output terminal through the inductor; the resonant power supply is controlled to enter a third state, wherein, in the third state, the resonant power supply passes through the The inductor and the first capacitor supply power to the output terminal; and the resonant power supply is controlled to enter the second state again.
  • the resonant power supply can perform power conversion on the voltage at the input end and supply power to the output end.
  • the high efficiency of the resonant circuit can be used to achieve gain adjustment and high efficiency. dynamic characteristics.
  • the controlling the resonant power supply to enter the second state includes: when the resonant power supply enters the first state for a first preset time, controlling the resonant power supply to enter the second state state. Based on such a design, the embodiment of the present application can control the resonant power supply to enter the second state according to whether the resonant power supply has been in the first state for a first preset time.
  • the controlling the resonant power supply to enter the second state again includes: when the resonant power supply enters the third state for a second preset time, controlling the resonant power supply to enter the second state again the second state. Based on such a design, the embodiments of the present application can control the resonant power supply to enter the second state again according to whether the resonant power supply enters the third state for a second preset time.
  • the resonant power supply before controlling the resonant power supply to enter or re-enter the third state, it also includes: obtaining the current of the inductor; and when the current reaches a zero-crossing threshold, exiting the third state Two states. Based on this design, whether to exit the current state can be triggered based on zero-crossing detection.
  • the zero-crossing threshold is 0. Based on such a design, the loss of switches in the resonant power supply can be reduced.
  • the method before the resonant power supply enters the third state, the method further includes: controlling the resonant power supply to enter a fourth state, wherein, in the fourth state, the The resonant power supply supplies power to the output end through the second capacitor.
  • the embodiment of the present application further provides a resonant conversion controller for controlling the working state of the resonant power supply
  • the resonant power supply includes an inductor and a first capacitor
  • the resonant conversion controller includes: a first control module , used to control the resonant power supply to enter the first state, wherein, in the first state, the resonant power supply is used for power conversion of the voltage at the input end and power supply to the output end, and for the inductor and the The first capacitor is charged;
  • the second control module is used to control the resonant power supply to enter the second state, wherein, in the second state, the resonant power supply supplies power to the output terminal through the inductor;
  • the third control module used to control the resonant power supply to enter a third state, wherein, in the third state, the resonant power supply supplies power to the output terminal through the inductor and the first capacitor;
  • the second control module is also used to control The resonant power supply enter
  • the second control module is further configured to control the resonant power supply to enter the second state when the resonant power supply enters the first state for a first preset time. Based on such a design, the embodiment of the present application can control the resonant power supply to enter the second state according to whether the resonant power supply has been in the first state for a first preset time.
  • the second control module is further configured to control the resonant power supply to enter the second state again when the resonant power supply enters the third state for a second preset time. Based on such a design, the embodiments of the present application can control the resonant power supply to enter the second state again according to whether the resonant power supply enters the third state for a second preset time.
  • the resonant conversion controller further includes an acquisition module; before controlling the resonant power supply to enter or re-enter the third state, the acquisition module is configured to acquire the current of the inductor; The second control module is configured to control the resonant power supply to exit the second state when the current reaches a zero-crossing threshold. Based on this design, whether to exit the current state can be triggered based on zero-crossing detection.
  • the zero-crossing threshold is 0, which can reduce the loss of switches in the resonant power supply.
  • the third control module is further configured to: control the resonant power supply to enter a fourth state, wherein, in the fourth state, The resonant power supply supplies power to the output terminal through the second capacitor.
  • the embodiments of the present application further provide a resonant conversion controller, including: a memory for storing a computer program; a processor for executing the computer program stored in the memory, when the computer program is executed During execution, the processor is used to execute the above-mentioned control method.
  • the embodiments of the present application further provide a storage medium, the storage medium includes computer instructions, and when the computer instructions are run on the resonant conversion controller, the resonant conversion controller executes the above-mentioned control method.
  • the control method of the resonant power supply, the resonant conversion controller and the storage medium provided in the embodiments of the present application can utilize the characteristics of high efficiency of the resonant circuit, and can realize gain adjustment and high dynamic characteristics, and can also determine the current The end of a state and the start of the next cycle simplifies control and reduces tolerance requirements on passive components.
  • FIG. 1 is a schematic structural diagram of a resonant power supply according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a circuit structure of a resonant power supply according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of another circuit structure of the resonant power supply of the embodiment of the present application.
  • FIG. 4 is a schematic diagram of another circuit structure of the resonant power supply according to the embodiment of the present application.
  • 5a-5d are diagrams of four working states of the resonant power supply in the embodiment of the present application.
  • 6a-6d show the inductor current waveform diagrams of the resonant power supply in the four working modes in the embodiment of the present application.
  • FIG. 7 is a schematic waveform diagram of the resonant power supply of the embodiment of the present application.
  • FIG. 8 is a schematic diagram of another circuit structure of the resonant power supply according to the embodiment of the present application.
  • FIG. 9 is a schematic diagram of an inductor current in a resonant power supply according to an embodiment of the present application.
  • FIG. 10 is another schematic diagram of the inductor current in the resonant power supply of the embodiment of the present application.
  • FIG. 11 is a flow chart of a method for controlling a resonant power supply according to an embodiment of the present application.
  • Fig. 12 is a schematic diagram of a resonant conversion controller according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a resonant conversion controller according to an embodiment of the present application.
  • the first control module 302 The first control module 302
  • the third control module 305 The third control module 305
  • first and second are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.
  • first application, the second application, etc. are used to distinguish different applications, rather than to describe the specific order of applications, and the features defined as “first” and “second” may explicitly or implicitly include one or More of this feature.
  • FIG. 1 is a schematic block diagram of a resonant power supply 100 provided by an embodiment of the present application.
  • the resonant power supply 100 in this embodiment can be used to receive electrical energy input from an external power supply, and adjust and transform the input electrical energy into output electrical energy for use by a load.
  • the resonant power supply 100 can realize the turn-on and turn-off of the low-loss switch tube through the resonance of the circuit, thereby achieving higher conversion efficiency.
  • the resonant power supply 100 in the embodiment of the present application may include a resonant converter 10 and a resonant conversion controller 20 .
  • the resonant converter 10 in the embodiment of the present application may be a switch-based resonant circuit, and may be used to perform power conversion on the voltage at the input terminal Vin, and thereby generate an output voltage to supply power to the output terminal Vout.
  • the resonant conversion controller 20 can be coupled to the resonant converter 10 and can be used to control switching of the resonant converter 10 , so as to regulate the action of power conversion of the resonant converter 10 .
  • the resonant conversion controller 20 may be implemented by a digital or analog controller, which is not limited in this application.
  • FIG. 2 is a schematic diagram of a circuit structure of a resonant power supply 100 provided by an embodiment of the present application.
  • the resonant converter 10 may include a switch circuit 12 and a resonant circuit 14 .
  • the switch circuit 12 may be coupled to the resonant circuit 14 .
  • the switch circuit 12 can receive a DC voltage source 30 through two input ports, and under the action of the control signal sent by the resonant conversion controller 20, selectively provide the DC voltage source 30 to all The resonant circuit 14 described above.
  • the switching circuit 12 may include switching elements S1-S6, and the resonant circuit 14 may include capacitors C1-C3 and an inductor L1.
  • the first end of the switching element S1 may be coupled to the first end of the DC voltage source 30, the second end of the switching element S1 may be coupled to the first end of the capacitor C1, and the switching element
  • the third terminal (ie, the control terminal) of S1 may be coupled to the resonant conversion controller 20 to receive a control signal output by the resonant conversion controller 20 .
  • the first end of the switch element S2 may be coupled to the second end of the capacitor C1, the second end of the switch element S2 may be coupled to the second end of the DC voltage source 30, the switch element
  • the third terminal (ie, the control terminal) of S2 may be coupled to the resonant conversion controller 20 to receive the control signal output by the resonant conversion controller 20 .
  • the first end of the switch element S3 may be coupled to the second end of the capacitor C1, the second end of the switch element S3 may be coupled to the first end of the capacitor C2, and the switch element S3
  • the third end ie, the control end
  • the first end of the switching element S4 may be coupled to the second end of the capacitor C2, the second end of the switching element S4 may be coupled to the second end of the switching element S2, and the switching element S4
  • the third end (ie, the control end) of can be coupled to the resonant conversion controller 20 to receive the control signal output by the resonant conversion controller 20 .
  • the first end of the switching element S5 may be coupled to the first end of the capacitor C2, the second end of the switching element S5 may be coupled to the first end of the inductor L1, and the switching element S5
  • the third end ie, the control end
  • the second end of the inductor L1 may be coupled to the first end of the capacitor C3, the first end of the capacitor C3 may also be coupled to the first end of the output circuit 16, and the second end of the capacitor C3 terminal and the second terminal of the output circuit 16 may be coupled to the second terminal of the switching element S4.
  • the first end of the switch element S6 may be coupled to a node between the first end of the capacitor C2 and the switch element S3, and the second end of the switch element S6 may be coupled to the inductor L1
  • the node between the first end and the second end of the switching element S5, the third end (ie, the control end) of the switching element S6 can be coupled to the resonant conversion controller 20 to receive the resonant conversion The control signal output by the controller 20.
  • the switch circuit 12 may further include a switch element S7.
  • the first end of the switching element S7 may be coupled to a node between the second end of the switching element S1 and the first end of the capacitor C1, and the second end of the switching element S7 may be coupled to the The second end of the switching element S6, and the third end (ie, the control end) of the switching element S7 can be coupled to the resonant conversion controller 20 to receive the control signal output by the resonant conversion controller 20 .
  • the resonant converter controller 20 may be connected with multiple signal detectors or sensors for detecting and monitoring multiple state variables of the resonant circuit 14 in the resonant converter 10 .
  • the aforementioned state variables may include the resonant inductor current flowing through the inductor L1, the resonant capacitor voltage at the capacitor C1, the resonant capacitor voltage at the capacitor C2, or the resonant capacitor voltage at the capacitor C2. Resonant capacitor voltage at C3.
  • the resonant power supply 100 in the embodiment of the present application is illustrated by taking the application of the resonant power supply 100 to a mobile phone as an example.
  • the resonant converter 10 can be used to convert the DC voltage output by the DC voltage source 30 (such as a battery), and generate an output voltage accordingly to supply power to the chip 40 of the mobile phone, for example,
  • the chip 40 may include a central processing unit (Central Processing Unit, CPU), and may optionally include other processing circuits.
  • CPU Central Processing Unit
  • the switching elements S1-S7 can be any suitable solid-state semiconductor switching devices, for example, Insulated Gate Bipolar Transistors (Insulate-Gate Bipolar Transistor, IGBTs) and Metal-Oxide-Semiconductor Field-Effect Transistors (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFETs), and in the following embodiments, the MOSFET is used as a switching element as an example for introduction. It can be understood that, in some usage scenarios, the switches in the switch circuit 12 may also include NMOS, PMOS, or CMOS.
  • FIG. 4 is a diagram of a specific application scenario of the resonant power supply 100 according to the embodiment of the present application.
  • the switch circuit 12 may include field effect transistors Q1-Q7.
  • the resonant conversion controller 20 may include a control circuit 22 and a zero-crossing detection circuit 24 .
  • the drain of the field effect transistor Q1 may be coupled to the anode of the DC voltage source 30, the source of the field effect transistor Q1 may be coupled to the first end of the capacitor C1, and the field effect transistor Q1 The gate of can be coupled to the control circuit 22 .
  • the drain of the field effect transistor Q2 may be coupled to the second end of the capacitor C1, the source of the field effect transistor Q2 may be coupled to the negative pole of the DC voltage source 30, and the field effect transistor Q2 The gate of can be coupled to the control circuit 22 .
  • the drain of the field effect transistor Q3 may be coupled to the second end of the capacitor C1, the source of the field effect transistor Q3 may be coupled to the first end of the capacitor C2, and the field effect transistor Q3
  • the gate of can be coupled to the control circuit 22 .
  • the drain of the field effect transistor Q4 may be coupled to the second end of the capacitor C2, the source of the field effect transistor Q4 may be coupled to the source of the field effect transistor Q2, and the field effect transistor The gate of Q4 can be coupled to the control circuit 22 .
  • the drain of the field effect transistor Q5 may be coupled to the first end of the capacitor C2, the source of the field effect transistor Q5 may be coupled to the first end of the inductor L1, and the field effect transistor Q5
  • the gate of can be coupled to the resonant conversion controller 20 to receive the control signal output by the control circuit 22 .
  • the second end of the inductor L1 can be coupled to the first end of the capacitor C3, the first end of the capacitor C3 can also be coupled to the first end of the chip 40, the second end of the capacitor C3 And the second end of the chip 40 can be coupled to the source of the field effect transistor Q4.
  • the drain of the field effect transistor Q6 may be coupled to a node between the first end of the capacitor C2 and the field effect transistor Q3, and the source of the field effect transistor Q6 may be coupled to the inductor L1
  • the node between the first end of the field effect transistor Q5 and the source of the field effect transistor Q5 , the gate of the field effect transistor Q6 can be coupled to the control circuit 22 .
  • the drain of the field effect transistor Q7 may be coupled to a node between the source of the field effect transistor Q1 and the first end of the capacitor C1, and the source of the field effect transistor Q7 may be coupled to the The source of the field effect transistor Q6 and the gate of the field effect transistor Q7 can be coupled to the control circuit 22 .
  • control circuit 22 can output control signals to the gates of the field effect transistors Q1-Q7 to control the turn-on or cut-off of the field effect transistors Q1-Q7.
  • the zero-crossing detection circuit 24 is used to detect the current of the inductor L1.
  • Figs. 5a-5d are diagrams showing four working states of the resonant power supply 100 in the embodiment of the present application.
  • Fig. 5a is a schematic diagram of the resonant power supply 100 working in state a in the embodiment of the present application. It can be understood that, in a possible usage scenario, the resonant conversion controller 20 can output a first signal (enable signal) to the field effect transistors Q1, Q3, Q5, and output a second signal (disable signal) to the field effect transistors Q2, Q4, Q6, Q7 to control the conduction of the field effect transistors Q1, Q3, Q5, and to control the turn-off of the field effect transistors Q2, Q4, Q6, Q7.
  • the resonant power supply 100 can work in a state, that is, the capacitor C1, the capacitor C2 and the inductor L1 are serially connected in series between the input voltage Vin and the output terminal Vout. At this time, the input voltage Vin and the output terminal Vout can be applied to On the resonant circuit including capacitor C1, capacitor C2, and inductor L1. It can be understood that when the resonant power supply 100 is in state a, the resonant power supply 100 can supply power to the output terminal (such as a chip), and can charge the capacitor C1, capacitor C2, and inductor L1 at the same time.
  • the output terminal such as a chip
  • Fig. 5b is a schematic diagram of the resonant power supply 100 working in state b in the embodiment of the present application. It can be understood that in a possible usage scenario, the resonant conversion controller 20 can output the second signal to the field effect transistors Q1, Q3, Q5, and output the first signal to the field effect transistors Q2, Q4 , Q6, Q7, to control the field effect transistors Q1, Q3, Q5 to turn off, and can control the field effect transistors Q2, Q4, Q6, Q7 to turn on.
  • the resonant power supply 100 can work in state b, that is, after the capacitor C1 and the capacitor C2 are connected in parallel, they are connected in series with the inductor L1 and the output terminal Vout.
  • the capacitor C2 is connected in parallel with the resonant circuit connected in series with the inductor L1. It can be understood that when the resonant power supply 100 is in state b, the resonant power supply 100 can supply power to an output terminal (such as a chip).
  • Fig. 5c is a schematic diagram of the resonant power supply 100 working in state c in the embodiment of the present application.
  • the resonant conversion controller 20 can output the first signal to the field effect transistors Q4, Q5, and output the second signal to the field effect transistors Q1-Q3, Q6 , Q7, to control the conduction of the field effect transistors Q4, Q5, and control the turn-off of the field effect transistors Q1-Q3, Q6, Q7.
  • the resonant power supply 10 can work in the c-state, that is, the output terminal Vout can be applied to the inductor L1.
  • the resonant power supply 100 can supply power to an output terminal (such as a chip).
  • Fig. 5d is a schematic diagram of the resonant power supply 100 working in state d in the embodiment of the present application. It can be understood that, in a possible usage scenario, the resonant conversion controller 20 may output a second signal to the field effect transistors Q1 - Q7 to control the field effect transistors Q1 - Q7 to be turned off.
  • Figs. 6a-6d show the inductor current waveform diagrams of the resonant power supply 100 in the four working modes in the embodiment of the present application. It can be understood that the resonant power supply 100 in the embodiment of the present application can form three working modes through the combination of different working states.
  • the first mode may include state a shown in FIG. 5a and state b shown in FIG. 5b.
  • the working time of the state a shown in Figure 5a can be half of the series resonance cycle including the capacitor C1, the capacitor C2 and the inductor L1
  • the working time of the b state shown in Figure 5b can be including the parallel connection of the capacitor C1 and the capacitor C2 Then and half of the series resonant period of inductor L1.
  • state a and state b can be used to form a complete working cycle, and the current of the inductor L1 in the whole cycle is shown in FIG. 6 a .
  • the curve S11 is the current waveform of the inductor L1 when the resonant power supply 100 is in state a.
  • Curve S12 is the current waveform of the inductor L1 when the resonant power supply 100 is in state b.
  • the second mode may include state a shown in FIG. 5a, state b shown in FIG. 5b and state b shown in FIG. 5c.
  • State c is shown, that is, the resonant power supply 100 can work sequentially in state a-state c-state b-state c.
  • the duration of the a-state and b-state of the resonant power supply 100 can be controlled by the resonant conversion controller 20 .
  • the resonant conversion controller 20 can detect the zero crossing of the current of the inductor L1.
  • the resonant power supply 100 can be controlled to exit the c-state and enter the next working state.
  • the current of the inductor L1 in the whole cycle is shown in Fig. 6b.
  • the curve S21 is the current waveform of the inductor L1 when the resonant power supply 100 is in state a.
  • Curve S22 is the current waveform of the inductor L1 when the resonant power supply 100 is in the c-state.
  • Curve S23 is the current waveform of the inductor L1 when the resonant power supply 100 is in state b.
  • Curve S24 is the current waveform of the inductor L1 when the resonant power supply 100 is in the c-state.
  • the d state is added in the middle of the half cycle or the middle of the cycle of the first mode or the second mode of the resonant power supply 100 .
  • the current of the inductor L1 is 0, and the current of the inductor L1 in the whole cycle is shown in FIGS. 6c and 6d.
  • the curve S31 is the current waveform of the inductor L1 when the resonant power supply 100 is in state a.
  • Curve S32 is the current waveform of the inductor L1 when the resonant power supply 100 is in the c-state.
  • the curve S41 is the current waveform of the inductor L1 when the resonant power supply 100 is in state a.
  • Curve S42 is the current waveform of the inductor L1 when the resonant power supply 100 is in the c-state.
  • Curve S43 is the current waveform of the inductor L1 when the resonant power supply 100 is in state b.
  • Curve S44 is the current waveform of the inductor L1 when the resonant power supply 100 is in the c-state.
  • the initial phases of state a and state b of the resonant power supply 100 are both 0, that is, the current of the inductor L1 is 0, and the voltages of the capacitors C1 and C2 are maximum voltage value.
  • the control of the resonance process since the control of the resonance process has two variables, namely amplitude and phase, the control of the resonance process is simplified by starting at 0 phase in state a and state b, that is, only the variable of amplitude needs to be controlled.
  • the zero-crossing of the inductance L1 is detected by the resonant conversion controller, the influence of the inductance and current on the resonant frequency can be ignored, reducing the tolerance requirements for passive components.
  • the resonant power supply 100 works at the resonant frequency, its output voltage is the highest.
  • the operating frequency of the resonant power supply 100 is higher or lower than the resonant frequency, its output voltage decreases.
  • the frequency of the voltage applied to the resonant power supply 100 is different, the output voltage will vary with the frequency. That is, the higher the switching frequency, the smaller the gain of the resonant power supply 100 .
  • the resonant power supply 100 When the resonant power supply 100 works in the first mode, its corresponding gain can be 1. When the resonant power supply 100 works in the second mode, the excitation frequency can be adjusted by adjusting the working time of state a and state b, thereby adjusting the gain. If the resonant power supply 100 cannot meet the gain requirement in the second mode, the resonant power supply 100 can be controlled to work in the third mode.
  • the resonant power source 100 requires high dynamic response characteristics, a corresponding control strategy needs to be adopted to improve the dynamic response capability of the resonant power source 100 .
  • the e state can be added after the a state, that is, the state of the resonant power supply 100 can be switched to a state-c state- e state-b state-c state.
  • FIG. 8 it is a schematic diagram of the resonant power supply 100 in state e.
  • the resonant conversion controller 20 can output a first signal to the field effect transistors Q1 and Q7, and output a second signal to the field effect transistors Q2-Q6 to control the field effect transistor Q1 and Q7 are turned on, and the field effect transistors Q2-Q6 are controlled to be turned off.
  • the inductor L1 is between the input voltage Vin and the output terminal Vout.
  • Vin when the current of the inductor L1 is 0 after state a, Vin can be used to increase the current of the inductor L1.
  • the initial value of the next state can be changed by increasing the voltage of the resonant capacitor, thereby changing the resonant process so that more current flows to the output terminal.
  • the embodiment of the present application can detect the output voltage. When the output voltage exceeds the threshold, reduce the time of the current state a or state b, and immediately switch to the state c, which can effectively reduce the resonance current and suppress the voltage rise. role.
  • FIG. 11 is a flow chart of a control method for a resonant power supply provided by an embodiment of the present application.
  • the control method of this embodiment can be applied to control the resonant power supply 100 shown in FIGS. 1 to 4 .
  • the control method of the resonant power supply in this embodiment may include the following steps: Step S111: Control the resonant power supply to enter the first state, wherein, in the first state, the resonant power supply supplies power to the output terminal and simultaneously charges the capacitor and the inductor.
  • the resonant power supply 100 in this embodiment can receive the electric energy of the external power supply, transform the electric energy of the external power supply, and supply power to the output terminal.
  • the resonant power supply 100 when the resonant power supply 100 starts to work, the resonant power supply 100 can be controlled to enter the first state, wherein the resonant power supply 100 supplies power to the output terminal Vout in the first state, and simultaneously supplies the capacitor C1 and Inductor L1 is charged. It can be understood that the output terminal Vout may be a load terminal.
  • the control circuit 22 can output signals to the field effect transistors Q1, Q3, Q5, and output signals to the field effect transistors Q2, Q4, Q6, Q7 , to control the field effect transistors Q1, Q3, Q5 to be turned on, and to control the field effect transistors Q2, Q4, Q6, Q7 to be turned off.
  • the resonant power supply 100 can work in a state as shown in FIG.
  • the output terminal Vout can be applied to a resonant circuit including a capacitor C1, a capacitor C2, and an inductor L1.
  • the external power supply can sink current into the inductor L1 through the capacitors C1 and C2. That is, the resonant power supply 100 can supply power to the output terminal Vout, and can also charge the capacitors C1 , C2 and the inductor L1 at the same time.
  • Step S112 Control the resonant power supply to enter a second state, wherein, in the second state, the resonant power supply supplies power to the output terminal through an inductor.
  • the time of the resonant power supply 100 in the first state reaches the first preset time, and if the time of the resonant power supply 100 in the first state reaches the first preset time, then control the resonant power supply 100 The power supply 100 enters the second state.
  • the control circuit 22 can output signals to the field effect transistors Q4, Q5, and output signals to the field effect transistors Q1-Q3, Q6, Q7, to control the field effect transistors Q4, Q5 turn on, and control the field effect transistors Q1-Q3, Q6, Q7 to turn off.
  • the resonant power supply 10 can work in state c as shown in FIG. 5c, that is, the output terminal Vout can be added to the inductance L1. In such a state, the resonant power supply 100 can supply power to the output terminal Vout through the inductor L1.
  • Step S113 When a zero-crossing signal of the inductor current is detected, control the resonant power supply to exit the second state.
  • the resonant power supply 100 can detect the current of the inductor L1 in real time through the zero-crossing detection circuit 24, and can feed back the detected current of the inductor L1 to the control circuit 22. Based on such a design, the control circuit 22 can control the working state of the resonant power supply 100 according to the current of the inductor L1.
  • the control circuit 22 will control the resonant power supply 100 to exit the c-state according to the zero-crossing detection.
  • the embodiments of the present application can trigger the resonant power supply 100 to exit the c-state through zero detection.
  • the resonant power supply 100 can determine the end of the current state and the start of the next cycle according to the zero-crossing detection, which simplifies the control and reduces the tolerance requirements for passive components, wherein the zero-crossing detection can be
  • the threshold setting can be very flexible, but it is roughly a value close to 0.
  • the threshold can be that the current of the inductor L1 is 1A.
  • the threshold can also be the inductor L1 The current is 0, and the threshold can also be set to other values. It can be understood that when the current of the inductor L1 is smaller, the corresponding switching loss is smaller.
  • the control circuit 22 when the zero-crossing detection circuit 24 detects that the current of the inductor L1 is 0, the control circuit 22 will control the resonant power supply 100 to exit the c-state according to the zero-crossing detection signal .
  • Step S114 Control the resonant power supply to enter a third state, wherein, in the third state, the resonant power supply supplies power to the output terminal through an inductor and a capacitor.
  • the control circuit 22 can output signals to the field effect transistors Q1, Q3, Q5, and output signals to the field effect transistors Q2, Q4, Q6 and Q7 are used to control the field effect transistors Q1, Q3 and Q5 to be turned off, and to control the field effect transistors Q2, Q4, Q6 and Q7 to be turned on.
  • the resonant power supply 100 can work in state b as shown in FIG.
  • the output terminal Vout can be It is added to the resonant circuit including capacitor C1 and capacitor C2 connected in parallel and connected in series with inductor L1.
  • the resonant power supply 100 can supply power to the output terminal Vout through the inductor L1 and the capacitors C1 and C2.
  • the resonant power supply 100 may also be controlled to enter a fourth state.
  • the resonant conversion controller 20 may output a second signal to the field effect transistors Q1 - Q7 to control the field effect transistors Q1 - Q7 to be turned off.
  • the resonant power supply 100 supplies power to the output terminal Vout only through the energy storage capacitor C3.
  • Step S115 Control the resonant power supply to enter the second state. It can be understood that in the embodiment of the present application, it may be confirmed whether the time of the resonant power supply 100 in the third state reaches the second preset time. If the resonant power supply 100 is in the third state for a second preset time, the resonant power supply is controlled to enter the second state.
  • the control circuit 22 can output signals to the field effect transistors Q4, Q5, and output signals to the field effect transistors Q1-Q3, Q6, Q7, so as to control the conduction of the field effect transistors Q4, Q5 , and control the field effect transistors Q1-Q3, Q6, Q7 to be turned off.
  • the resonant power supply 100 can work in state c as shown in FIG. 5 c , and the resonant power supply 100 can supply power to the output terminal Vout through the inductor L1 .
  • switching between switches of the resonant power supply 100 can be controlled based on the detection of the zero-crossing detection circuit.
  • the control method of the resonant power supply proposed in the present application determines the end of the current state and the start of the next cycle by detecting the zero crossing method, which simplifies the control and reduces the requirement for the tolerance of passive components.
  • the embodiment of the present application adopts a special dynamic response strategy, which improves the dynamic capability and realizes gain adjustment. Xu understands that in the above embodiments, the first preset time and the second preset time can be flexibly set according to actual system requirements, which are not limited in this embodiment.
  • FIG. 12 is a schematic structural diagram of a resonant conversion controller disclosed in an embodiment of the present application. Wherein, the resonant conversion controller can be used to execute some or all steps of the method for controlling the resonant power supply described in FIG. 11 . For details, please refer to the related description in FIG. 11 , which will not be repeated here.
  • the resonant conversion controller 20 may include: an acquisition module 301 , a first control module 302 and a processing module 303 , a second control module 304 , and a third control module 305 .
  • the first control module 302 is used to control the resonant power supply to enter the first state, wherein, in the first state, the resonant power supply 100 is used to perform power conversion on the voltage at the input terminal and supply the voltage to the output terminal Vout supply power, and charge the inductor L1 and the capacitor C1.
  • the processing module 303 is used to confirm whether the time of the resonant power supply 100 in the first state reaches a preset time. If the time of the resonant power supply 100 in the first state reaches the first preset time, the second control module 304 controls the resonant power supply to enter the second state, wherein, in the second state, the resonant The power supply 100 supplies power to the output terminal Vout through the inductor L1.
  • the second control module 304 is also used to control the resonant power supply 100 to exit the second state;
  • the third control module 305 is used to control the resonant power supply 100 to enter a third state, wherein, in the third In this state, the resonant power supply 100 supplies power to the output terminal Vout through the inductor L1 and the capacitor C1.
  • the obtaining module 301 is used to obtain the current of the inductor; and the processing module 303 is also used to obtain a zero-crossing detection signal based on whether the current of the inductor L1 reaches a zero-crossing threshold.
  • the zero-crossing threshold may be 1A, the zero-crossing threshold may also be 0, or other values. It can be understood that when the current of the inductor L1 is smaller, the corresponding switching loss is smaller.
  • the obtaining module 301 is also used to obtain a zero-crossing detection signal; the processing module 303 is also used to confirm whether the resonant power supply 100 is in the third state for a second preset time. If the resonant power supply 100 is in the third state for a second preset time, the second control module 304 controls the resonant power supply 100 to enter the second state. The second control module 304 can control the resonant power supply 100 to exit the second state based on the zero detection signal.
  • the third control module 305 is further configured to control the resonant power supply 100 to enter a fourth state, wherein, in the fourth state, the resonant power supply 100 can supply power to the output terminal Vout through the capacitor C3.
  • each module in the resonant conversion controller 20 is only for illustration, and in other embodiments, the resonant conversion controller 20 can be divided into different modules according to needs, so as to complete the above-mentioned resonant conversion control All or part of the functions of the device 20.
  • each module in the resonant conversion controller 20 provided in the embodiment of the present application may be in the form of a computer program.
  • the specific implementation of each module in the embodiment of the present application may also refer to the corresponding description of the method embodiment shown in FIG. 11 .
  • FIG. 13 is another schematic structural diagram of the resonant conversion controller 20 provided by the embodiment of the present application.
  • the resonant conversion controller 20 includes a memory 201 and at least one processor 202 .
  • the structure of the resonant conversion controller 20 shown in FIG. 13 does not constitute a limitation of the embodiment of the present application, and the resonant conversion controller 20 may also include more or less other hardware than shown in the figure. Or software, or a different arrangement of components.
  • the resonance conversion controller 20 includes a terminal capable of automatically performing numerical calculation and/or information processing according to preset or stored instructions, and its hardware includes but not limited to microprocessors, dedicated integrated circuits, programmable gate arrays, digital processors and embedded devices, etc.
  • the memory 201 is used to store program codes and various data.
  • Described memory 201 can comprise read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), programmable read-only memory (Programmable Read-Only Memory, PROM), erasable programmable read-only memory Memory (Erasable Programmable Read-Only Memory, EPROM), One-time Programmable Read-Only Memory (OTPROM), Electronically Erasable Programmable Read-Only Memory (Electrically-Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disk storage, magnetic disk storage, tape storage, or any other computer-readable medium that can be used to carry or store data.
  • Read-Only Memory Read-Only Memory
  • RAM Random Access Memory
  • PROM Programmable Read-Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • OTPROM One-time Programmable Read-Only Memory
  • the at least one processor 202 may include an integrated circuit, for example, may include a single packaged integrated circuit, or may include multiple integrated circuits with the same function or different functions packaged, including a microprocessor, a digital processing chip , a graphics processor and a combination of various control chips, etc.
  • the at least one processor 202 is the control core (Control Unit) of the resonant conversion controller, by running or executing the program or module stored in the memory 201, and calling the data stored in the memory 201, To perform various functions and process data of the resonant conversion controller 20, for example, to perform the control function of the resonant power supply.
  • Control Unit Control Unit
  • the above-mentioned integrated units implemented in the form of software function modules can be stored in a computer-readable storage medium.
  • the above-mentioned software functional modules are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, a terminal, or a network device, etc.) or a processor (processor) to execute the methods described in the various embodiments of the present application. part.
  • Program codes are stored in the memory 201 , and the at least one processor 202 can invoke the program codes stored in the memory 201 to execute related functions.
  • the memory 201 stores a plurality of instructions, and the plurality of instructions are executed by the at least one processor 202 to implement a method for controlling a resonant power supply.
  • the at least one processor 202 for the specific implementation method of the above instructions by the at least one processor 202, reference may be made to the description of relevant steps in the embodiment corresponding to FIG. 11 , and details are not repeated here.
  • resonant power supply and its control method in the embodiment of the present application can utilize the characteristics of high efficiency of the resonant circuit, and can realize gain adjustment and high dynamic characteristics, and can also determine the end of the current state and the next one by detecting the zero-crossing method.
  • the start of the cycle simplifies control and reduces tolerance requirements on passive components.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Sont divulgués dans des modes de réalisation de la présente demande un procédé de commande d'une alimentation électrique de résonance, un dispositif de commande de conversion de résonance et un support de stockage. Le procédé de commande consiste à : commander l'alimentation électrique de résonance pour qu'elle entre dans un premier état, dans le premier état, l'alimentation électrique de résonance étant conçue pour effectuer une conversion de puissance sur une tension d'une extrémité d'entrée et alimenter électriquement à une extrémité de sortie, et pour charger une bobine d'induction et un premier condensateur ; commander l'alimentation électrique de résonance pour qu'elle entre dans un deuxième état, dans le deuxième état, l'alimentation électrique de résonance alimentant électriquement l'extrémité de sortie au moyen de la bobine d'induction ; et commander l'alimentation électrique de résonance pour qu'elle entre dans un troisième état, dans le troisième état, l'alimentation électrique de résonance alimentant électriquement l'extrémité de sortie au moyen de la bobine d'induction et du premier condensateur. Les modes de réalisation de la présente demande peuvent utiliser la caractéristique de rendement élevé d'un circuit de résonance, et peuvent obtenir un ajustement de gain et des caractéristiques dynamiques élevées.
PCT/CN2021/100743 2021-06-17 2021-06-17 Procédé de commande d'alimentation électrique de résonance, dispositif de commande de conversion de résonance et support de stockage WO2022261914A1 (fr)

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PCT/CN2021/100743 WO2022261914A1 (fr) 2021-06-17 2021-06-17 Procédé de commande d'alimentation électrique de résonance, dispositif de commande de conversion de résonance et support de stockage
CN202180006442.5A CN115885461A (zh) 2021-06-17 2021-06-17 谐振电源的控制方法、谐振变换控制器及存储介质

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107834844A (zh) * 2017-10-19 2018-03-23 华为技术有限公司 一种开关电容变换电路、充电控制系统及控制方法
CN109274264A (zh) * 2018-11-21 2019-01-25 北京理工大学 一种宽调压范围的升压式谐振开关电容变换器
CN109792205A (zh) * 2016-10-06 2019-05-21 株式会社村田制作所 Dc-dc转换器
CN213243821U (zh) * 2020-10-30 2021-05-18 陕西科技大学 一种带抽头电感和有源边谐振单元的升压变换器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109792205A (zh) * 2016-10-06 2019-05-21 株式会社村田制作所 Dc-dc转换器
CN107834844A (zh) * 2017-10-19 2018-03-23 华为技术有限公司 一种开关电容变换电路、充电控制系统及控制方法
CN109274264A (zh) * 2018-11-21 2019-01-25 北京理工大学 一种宽调压范围的升压式谐振开关电容变换器
CN213243821U (zh) * 2020-10-30 2021-05-18 陕西科技大学 一种带抽头电感和有源边谐振单元的升压变换器

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