WO2022161352A1 - Appareil d'alimentation électrique et dispositif électronique - Google Patents

Appareil d'alimentation électrique et dispositif électronique Download PDF

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Publication number
WO2022161352A1
WO2022161352A1 PCT/CN2022/073794 CN2022073794W WO2022161352A1 WO 2022161352 A1 WO2022161352 A1 WO 2022161352A1 CN 2022073794 W CN2022073794 W CN 2022073794W WO 2022161352 A1 WO2022161352 A1 WO 2022161352A1
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Prior art keywords
switch
capacitor
power conversion
sub
power supply
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PCT/CN2022/073794
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English (en)
Chinese (zh)
Inventor
李达寰
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维沃移动通信有限公司
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Publication of WO2022161352A1 publication Critical patent/WO2022161352A1/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
    • H02M1/00—Details of apparatus for conversion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present application belongs to the field of electronic equipment, and in particular relates to a power supply device and electronic equipment.
  • the power supply device includes a power conversion module capable of converting the input voltage of the power supply device into a working voltage required by the load of the power supply device.
  • a power conversion module capable of converting the input voltage of the power supply device into a working voltage required by the load of the power supply device.
  • the purpose of the embodiments of the present application is to provide a power supply device and an electronic device, which can solve the problem of how to balance the wide input voltage and high power conversion efficiency of the power supply device.
  • an embodiment of the present application provides a power supply device, the power supply device includes a switch control module, a first switch and at least one second switch, a plurality of capacitors, and a plurality of power conversion modules having the same number as the plurality of capacitors, wherein : Multiple capacitors are connected in series; among multiple capacitors, the first capacitor is connected to the input voltage, two adjacent capacitors are grounded through a second switch, and the last capacitor is grounded through the first switch; multiple power conversion modules , each power conversion module is connected in parallel with a capacitor; the switch control module controls the number of power conversion modules in the working state through the first switch and at least one second switch according to the input voltage, and the number of power conversion modules in the working state It is positively related to the input voltage.
  • an embodiment of the present application provides an electronic device, including the power supply device described in the first aspect.
  • a power supply device includes a switch control module, a first switch and at least one second switch, a plurality of capacitors, and a plurality of power conversion modules with the same number as the plurality of capacitors, wherein: the plurality of capacitors are connected in series ; Among multiple capacitors, the first capacitor is connected to the input voltage, two adjacent capacitors are grounded through a second switch, and the last capacitor is grounded through the first switch; among multiple power conversion modules, each power conversion The module is connected in parallel with a capacitor; the switch control module controls the number of power conversion modules in the working state through the first switch and at least one second switch according to the input voltage, and the number of power conversion modules in the working state is positively correlated with the input voltage.
  • the power supply device can control different numbers of power conversion modules to work under different input voltages, and each power conversion module works within a smaller voltage range, so that the power supply device can use low A device with withstand voltage and high efficiency, taking into account the wide input voltage and high power conversion efficiency of the power supply device.
  • FIG. 1 is a schematic structural diagram of a first power supply device according to an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a second power supply device according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a third power supply device according to an embodiment of the present application.
  • 4a is a schematic diagram of voltages of a plurality of operating voltages received by an output interface in a power supply device according to an embodiment of the present application;
  • FIG. 4b is a voltage schematic diagram of the superimposed working voltage output by an output interface in a power supply device according to an embodiment of the present application.
  • 11-switch control module 121-first switch, 122-first sub-switch, 123-second sub-switch, 124-third sub-switch, 131-first capacitor, 132-second capacitor, 133-third capacitor, 134-fourth capacitor, 141-first power conversion module, 142-second power conversion module, 143-third power conversion module, 144-fourth power conversion module, 15-output interface, 16-filter module, 17- Rectifier module, 18-DC voltage transmission, 19-filter capacitor.
  • first, second and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between “first”, “second”, etc.
  • the objects are usually of one type, and the number of objects is not limited.
  • the first object may be one or more than one.
  • “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the associated objects are in an "or” relationship.
  • an embodiment of the present application provides a power supply device and an electronic device.
  • the power supply device includes a switch control module 11 , a first switch 121 and at least one second switch, a plurality of capacitors, and a plurality of power conversion modules having the same number as the plurality of capacitors.
  • the first switch 121 and the second switch may be switches with the same structure, or may be switches with different structures. When the number of at least one second switch is greater than one, the plurality of second switches may be switches with the same structure or switches with different structures.
  • the first switch 121 and the second switch may be triodes, metal oxide semiconductor field effect (MOS) transistors, relays, etc., or may be switch tubes composed of multiple devices.
  • the capacitor may be a filter electrolytic capacitor.
  • the number of the at least one second switch may be one, or two, or more than two.
  • the number of the plurality of capacitors may be the sum of the numbers of the first switch and the at least one second switch.
  • the number of the plurality of power conversion modules is the same as the number of the plurality of capacitors.
  • the number of at least one second switch is greater than two, the power supply device is similar in structure to the power supply device in FIG. 3 , and correspondingly increased on the basis of the structure of the power supply device in FIG. 3
  • the number of second switches, capacitors and power conversion modules are four, the number of the plurality of capacitors included in the power supply device is five, and the number of the plurality of power conversion modules is five.
  • a plurality of capacitors are connected in series.
  • the first capacitor is connected to the input voltage
  • two adjacent capacitors are connected to the ground through a second switch
  • the last capacitor is connected to the ground through the first switch.
  • the first capacitor and the last capacitor may be the first capacitor and the last capacitor determined by ordering a plurality of capacitors connected in series according to a preset direction.
  • each power conversion module is connected in parallel with a capacitor.
  • the plurality of power conversion modules are in one-to-one correspondence with the plurality of capacitors, and each power conversion module is connected in parallel with the corresponding capacitor.
  • the power supply device further includes: a rectification module 17 connected to the switch control module 11 for receiving the input voltage and outputting the rectified rectified voltage to the switch control module 11 .
  • the input end of the rectifier module 17 is connected to the output end of the filter module 16 , and the output end of the rectifier module 17 is connected to the input end of the switch control module 11 .
  • the input voltage connected to the first capacitor may be the rectified voltage passed through the rectification module 17 .
  • the input voltage connected to the first capacitor may be a rectified voltage collected at a high voltage direct current transmission (HVDC).
  • the rectified voltage is obtained by rectifying the input voltage through the rectifying module 17 .
  • HVDC transmission 18 is a high-power long-distance direct current transmission using the advantages of stable direct current with no inductive reactance, no capacitive reactance, and no synchronization problems.
  • the HVDC transmission 18 may be regarded as a preset voltage value collection point for collecting voltage values.
  • each of the power conversion modules is connected to the output interface 15 .
  • Each power conversion module collects the voltage difference across the capacitors connected in parallel, converts the voltage difference, and outputs the converted working voltage to the output interface 15 . If the collected absolute value of the voltage difference across the capacitors connected in parallel is greater than zero, the power conversion module is in a working state, converts the collected voltage difference into a working voltage, and outputs the working voltage to the output interface 15 .
  • the output interface 15 receives the working voltage provided by the power conversion module, and outputs the working voltage to supply power to the load of the power supply device; when the number of the power conversion modules in the working state is When there are more than one, the output interface 15 receives a plurality of working voltages respectively provided by a plurality of power conversion modules in a working state, and superimposes and outputs the multiple working voltages to supply power to the load of the power supply device.
  • FIG. 4a is a schematic diagram of voltages of multiple operating voltages received by an output interface in a power supply device provided by an embodiment of the application
  • FIG. 4b is a superimposed operation of the output interface output in a power supply device provided by an embodiment of the application Voltage schematic for voltage.
  • the first working voltage waveform 402 may represent the voltage waveform of the first working voltage output by the first power conversion module in the working state
  • the second voltage waveform 404 may represent the second working voltage in the working state.
  • the way of superimposing the two voltage waveforms can be as follows: comparing the voltage values corresponding to the two voltage waveforms at each time point, and taking the larger comparison result as the voltage value corresponding to the superimposed output waveform at the time point.
  • the output voltage waveform 406 is obtained after the first working voltage waveform 402 and the second working voltage waveform 404 are superimposed.
  • the output voltage waveform has smaller ripple compared with multiple working voltage waveforms, and is more stable when supplying power to the load.
  • the number of power conversion modules in the working state is two, and the voltage waveforms of the output working voltages are the first working voltages respectively.
  • 402 waveform and the second working voltage waveform 404 when the phase difference between the first working voltage waveform 402 and the second working voltage waveform 404 is ⁇ /2, the ripple of the output waveform 406 obtained by superposition is the smallest, as shown in Figure 4b .
  • the phase difference between the first working voltage waveform 402 and the second working voltage waveform 404 is ⁇ /2
  • the second working voltage waveform 404 is at a minimum value
  • the first working voltage waveform 402 is at a maximum value.
  • a plurality of power conversion modules in a working state are communicatively connected.
  • the communication connection can be as follows, as shown in FIG. 2 , the first power conversion module 141 in the working state initiates a communication handshake to the second power conversion module; when the second power conversion module 142 is in the working state, it responds to the handshake and passes The switching frequency is controlled so that the phase difference corresponding to the second power conversion module 142 and the first power conversion module 141 is ⁇ /2; when the second power conversion module 142 is in a non-working state, it cannot respond to the handshake, and the first power conversion module 141 continues to work.
  • each power conversion module can obtain the voltage waveform corresponding to the voltage difference collected by other power conversion modules, and then control the switch connected to the corresponding capacitor according to the voltage waveform corresponding to the voltage difference collected by other power conversion modules.
  • the switching frequency is so that the phase difference between the voltage waveforms corresponding to the plurality of power conversion modules in the working state is a preset value, such as ⁇ /2.
  • each power conversion module is connected to a filter capacitor; the filter capacitor is grounded.
  • the filter capacitor 19 is used to make the voltage waveform output by the output interface smoother, thereby improving the stability when supplying power to the load of the power supply device.
  • the voltage waveform output by the output interface in the embodiment of the present application may be the output waveform obtained by superimposing the working waveforms output by a plurality of power conversion modules in the working state. Therefore, the output waveform has the advantage of small ripple.
  • the capacitor 19 can also be selected as a capacitor device with a smaller capacitance value, which reduces hardware requirements for device selection and reduces power consumption.
  • the switch control module controls the number of the power conversion modules in the working state through the first switch and the at least one second switch according to the input voltage, and the number of the power conversion modules in the working state is positively correlated with the input voltage.
  • the input voltage may be an AC voltage.
  • the number of capacitors conducting in series increases as the voltage increases.
  • the switch control module 11 may also control the turn-on and turn-off of the first switch 121 and the at least one second switch according to the rectified voltage obtained by rectifying the input voltage, so as to control the number of capacitors that are connected in series, and the capacitors are connected in series.
  • the amount of conduction is positively related to the rectified voltage.
  • the rectified voltages are all non-negative.
  • FIG. 1 and FIG. 2 an embodiment of a power supply device including two capacitors and two power conversion modules is specifically described.
  • the at least one second switch includes a first sub-switch 122; the plurality of capacitors include a first capacitor 131 and a second capacitor 132; the plurality of power conversion modules include a first power conversion module 141 and a second power conversion module 142;
  • the first capacitor 131 and the second capacitor 132 are connected in series; the second capacitor 132 is connected to the input voltage; the first capacitor 131 and the second capacitor 132 are connected to ground through the first sub-switch 122 ; the first capacitor 131 is connected to the ground through the first switch 121 Ground;
  • the first power conversion module 141 is connected in parallel with the first capacitor 131 ; the second power conversion module 142 is connected in parallel with the second capacitor 132 .
  • the number of the at least one second switch is one, that is, the at least one second switch includes the first sub-switch 122
  • the power supply device includes the first switch 121 and the first sub-switch 122 .
  • a sub-switch 122 .
  • the number of the multiple capacitors is two, that is, the multiple capacitors include the first capacitor 131 and the second capacitor 132 .
  • the number of the plurality of power conversion modules is the same as the number of the plurality of capacitors, that is, the plurality of power conversion modules include a first power conversion module 141 and a second power conversion module 142 .
  • the second capacitor 132 is connected to the input voltage.
  • the second capacitor 132 and the first capacitor 131 are two adjacent capacitors.
  • the second capacitor 132 and the first capacitor 131 are grounded through the first sub-switch 122. It can be understood that one end of the second capacitor 132 is connected to the first sub-switch 122, and when the first sub-switch 122 is turned on, it is grounded, and the second sub-switch 122 is connected to the ground.
  • the end of the capacitor 132 connected to the first sub-switch is connected to the first capacitor 131 .
  • the first capacitor 131 is grounded through the first switch 121 .
  • the first power conversion module 141 is connected in parallel with the first capacitor 131 .
  • the first power conversion module 141 collects the voltage difference across the first capacitor 131 , converts the voltage difference, and outputs the first operating voltage to the output interface 15 .
  • the second power conversion module 142 is connected in parallel with the second capacitor 132 .
  • the second power conversion module 142 collects the voltage difference across the second capacitor 132 , converts the voltage difference, and outputs the first operating voltage to the output interface 15 .
  • the second capacitor 132 When the second capacitor 132 is grounded, the absolute value of the voltage difference between the two ends of the second capacitor 132 is greater than zero, and the second power conversion module 142 is in a working state at this time.
  • the second capacitor When the second capacitor is connected to the ground in series with the first capacitor, the absolute value of the voltage difference across the second capacitor 132 is greater than zero, and the absolute value of the voltage difference across the first capacitor 131 is greater than zero.
  • the first power conversion module 141 is connected to The second power conversion modules 142 are all in working state.
  • the switch control module 11 controls the first sub-switch 122 to be turned on and the first switch 121 to be turned off, so that the second capacitor 132 is grounded; when the rectified voltage is detected When the second operating voltage threshold is reached, the switch control module 11 controls the first switch 121 to turn on and controls the first sub-switch 122 to turn off, so that the first capacitor 131 and the second capacitor 132 are connected to ground in series; wherein, the second operating voltage threshold is greater than The first operating voltage threshold; after the rectified voltage reaches the second operating voltage threshold, the power supply device supplies power to the load in a state where the first switch 121 is turned on and the first sub-switch 122 is turned off.
  • the rectified voltage may be a voltage obtained by rectifying an AC voltage.
  • the voltage values of the rectified voltage are all non-negative values.
  • the rectified voltage rises from zero until the peak value of the voltage waveform, drops from the peak value to zero, rises from zero to the peak value again, and drops from the peak value to zero... Constantly repeating the voltage value The process of rising and falling.
  • Both the initial state of the first switch 121 and the first sub-switch 122 may be an off state. Then both the first capacitor 131 and the second capacitor 132 are not grounded, and the power supply device is in a non-working state.
  • the switch control module 11 receives the rectified voltage. When the voltage value of the rectified voltage is less than the first operating voltage threshold v1, the switch control module 11 is in a non-working state and does not perform any control on the first switch 121 or the first sub-switch 122.
  • the first working voltage threshold v1 may be a start-up voltage threshold at which the switch control module 11 starts to work.
  • the switch control module 11 When the switch control module 11 detects that the rectified voltage reaches the first operating voltage threshold v1, the switch control module 11 controls the first sub-switch 122 to turn on and controls the first switch 121 to turn off, so that the second capacitor 132 is grounded.
  • the second power conversion module 142 with the two capacitors 132 connected in parallel is in a working state, collects the voltage difference between the two ends of the second capacitor 132 and outputs the second working voltage to the output interface 15 .
  • the switch control module 11 When the switch control module 11 detects that the rectified voltage reaches the second operating voltage threshold v2, the switch control module 11 controls the first switch 121 to be turned on and the first sub-switch 122 to be turned off, so that the first capacitor 131 and the second capacitor 132 are connected in series ground. At this time, the first power conversion module 141 connected in parallel with the first capacitor 131 and the second power conversion module 142 connected in parallel with the second capacitor 132 are both in the working state, and the voltages across the first capacitor 131 and the second capacitor 132 are collected respectively. difference and output the first working voltage and the second working voltage to the output interface 15 . And the second operating voltage threshold v2 is greater than the first operating voltage threshold v1.
  • the switch control module 11 After the switch control module 11 detects that the rectified voltage reaches the second operating voltage threshold v2, the first switch 121 remains on and the first sub-switch 122 remains off, and the first capacitor 131 and the second capacitor 132 are kept connected to ground in series, that is, The power supply device supplies power to the load when both the first power conversion module 141 and the second power conversion module 142 are in working state.
  • the switch control module 11 only controls the first sub-switch 122 to be turned on and the voltage value reaches the first operating voltage threshold v1 for the first time.
  • the switch control module 11 no longer performs any switch control action.
  • the switch control module 11 no longer performs any switch control action.
  • the power supply device controls the turn-on and turn-off of the first switch 121 and the first sub-switch 122 to control the number of capacitors connected in series to be one, then the second power conversion module 142 connected in parallel with the second capacitor 132 In the working state, it outputs power to the output interface 15 .
  • a second power conversion module can be used to supply power to the load.
  • the first capacitor 131 and the second capacitor 132 in the power supply device are connected to ground in series. Therefore, when the input voltage is high, the power supply device controls the turn-on and turn-off of the first switch 121 and the first sub-switch 122, and the number of control capacitors connected in series is two, and the first capacitor 131 is connected in parallel.
  • the first power conversion module 141 is in a working state and outputs power to the output interface 15
  • the second power conversion module 142 connected in parallel with the second capacitor 132 is in a working state and outputs power to the output interface 15 .
  • the power supply device can effectively improve the power conversion efficiency of the power supply device by using the device with relatively small stress requirements.
  • FIG. 1 and FIG. 3 an embodiment of a power supply device including three capacitors will be described in detail.
  • the at least one second switch includes a second sub-switch 123 and a third sub-switch 124; the plurality of capacitors include a first capacitor 131, a third capacitor 133 and a fourth capacitor 134; and the plurality of power conversion modules include a first power supply
  • the third sub-switch 124 is grounded; between the first capacitor 131 and the third capacitor 133, the second sub-switch 123 is grounded; the first capacitor 131 is grounded through the first switch 121; the first power conversion module 141 is connected in parallel with the first capacitor 131 ; the third power conversion module 143 is connected in parallel with the third capacitor 133 ; the fourth power conversion module 144 is connected in parallel with the fourth capacitor 134 .
  • the number of the at least one second switch is two, that is, the at least one second switch includes a second sub-switch 123 and a third sub-switch 124 , and the power supply device It includes a first switch 121 , a second sub-switch 123 and a third sub-switch 124 .
  • the number of the plurality of capacitors is three, that is, the plurality of capacitors include a first capacitor 131 , a third capacitor 133 and a fourth capacitor 134 .
  • the number of the plurality of power conversion modules is the same as the number of the plurality of capacitors, that is, the plurality of power conversion modules include a first power conversion module 141 , a third power conversion module 143 and a fourth power conversion module 144 .
  • the second capacitor 132 is connected to the input voltage.
  • the second capacitor 132 and the first capacitor 131 are two adjacent capacitors.
  • the second capacitor 132 and the first capacitor 131 are grounded through the first sub-switch 122. It can be understood that one end of the second capacitor 132 is connected to the first sub-switch 122, and when the first sub-switch 122 is turned on, it is grounded, and the second sub-switch 122 is connected to the ground.
  • the end of the capacitor 132 connected to the first sub-switch is connected to the first capacitor 131 .
  • the first capacitor 131 is grounded through the first switch 121 .
  • the fourth capacitor 134 is connected to the input voltage.
  • the fourth capacitor 134 and the third capacitor 133 are two adjacent capacitors. Between the fourth capacitor 134 and the third capacitor 133, the third sub-switch 124 is grounded. It can be understood that one end of the fourth capacitor 134 is connected to the third sub-switch 124, and when the third sub-switch 124 is turned on, the third sub-switch 124 is grounded. One end of the four capacitors 134 connected to the third sub-switch 124 is connected to the third capacitor 133 .
  • the third capacitor 133 and the first capacitor 131 are two adjacent capacitors. Between the third capacitor 133 and the first capacitor 131, the second sub-switch 123 is grounded. It can be understood that one end of the third capacitor 133 is connected to the second sub-switch 123, and when the second sub-switch 123 is turned on, it is grounded. The end of the three capacitors 133 connected to the second sub-switch 123 is connected to the first capacitor 131 .
  • the first capacitor 131 is grounded through the first switch 121 .
  • the switch control module 11 controls the third sub-switch 124 to be turned on, and controls the second sub-switch 123 and the first switch 121 to be turned off, so that the fourth capacitor 134 Ground; when it is detected that the rectified voltage reaches the fourth operating voltage threshold, the switch control module 11 controls the second sub-switch 123 to be turned on, and controls the third sub-switch 124 and the first switch 121 to be disconnected, so that the fourth capacitor 134 and the first switch 121 are disconnected.
  • the three capacitors 133 are connected to ground in series; the fourth operating voltage threshold is greater than the third operating voltage threshold; when it is detected that the rectified voltage reaches the fifth operating voltage threshold, the switch control module 11 controls the first switch 121 to conduct, and controls the second sub-voltage
  • the switch 123 and the third sub-switch 124 are disconnected, so that the fourth capacitor 134, the third capacitor 133 and the first capacitor 131 are connected to ground in series; wherein, the fifth operating voltage threshold is greater than the fourth operating voltage threshold; when the rectified voltage reaches the fifth operating voltage After the voltage threshold, the power supply device supplies power to the load in a state in which the first switch 121 is turned on and the second sub-switch 123 and the third sub-switch 124 are turned off.
  • the rectified voltage may be a voltage obtained by rectifying an AC voltage.
  • the voltage values of the rectified voltage are all non-negative values, and the voltage value of the rectified voltage rises from zero to the peak value of the voltage waveform, drops from the peak value to zero, rises from zero to the peak value again, and drops from the peak value to zero... The process of rising and falling of the voltage value is repeated continuously.
  • the initial state of the first switch 121 , the second sub-switch 123 and the third sub-switch 124 may all be an off state.
  • the first capacitor 131 , the third capacitor 133 and the fourth capacitor 134 are not grounded, and the power supply device is in a non-working state.
  • the switch control module 11 receives the rectified voltage.
  • the switch control module 11 When the voltage value of the rectified voltage is less than the third operating voltage threshold v3, the switch control module 11 is in a non-working state and does not perform any operation on the first switch 121, the second sub-switch 123 or the third sub-switch 124. any control.
  • the third operating voltage threshold v3 may be a start-up voltage threshold at which the switch control module 11 starts to work.
  • the switch control module 11 When the switch control module 11 detects that the rectified voltage reaches the third operating voltage threshold v3, the switch control module 11 controls the third sub-switch 124 to be turned on, and controls the second sub-switch 123 and the first switch 121 to be turned off, so that the fourth capacitor 134 is grounded. At this time, the fourth power conversion module 144 connected in parallel with the fourth capacitor 134 is in a working state, collects the voltage difference across the fourth capacitor 134 and outputs the fourth working voltage to the output interface 15 .
  • the switch control module 11 When the switch control module 11 detects that the rectified voltage reaches the fourth operating voltage threshold v2, the switch control module 11 controls the second sub-switch 123 to be turned on, and controls the third sub-switch 124 and the first switch 121 to be turned off, so that the fourth capacitor 134 is connected to ground in series with the third capacitor 133 .
  • the fourth power conversion module 144 connected in parallel with the fourth capacitor 134 and the third power conversion module 143 connected in parallel with the third capacitor 133 are both in the working state, and the voltages across the fourth capacitor 134 and the third capacitor 133 are collected respectively. difference and output the fourth working voltage and the third working voltage to the output interface 15 .
  • the fourth operating voltage threshold v4 is greater than the third operating voltage threshold v3.
  • the switch control module 11 When the switch control module 11 detects that the rectified voltage reaches the fifth operating voltage threshold v5, the switch control module 11 controls the first switch 121 to be turned on, and controls the second sub-switch 123 and the third sub-switch 124 to be turned off, so that the fourth capacitor 134.
  • the third capacitor 133 and the first capacitor 131 are connected to ground in series.
  • the fourth power conversion module 144 connected in parallel with the fourth capacitor 134, the third power conversion module 143 connected in parallel with the third capacitor 133, and the first power conversion module 141 connected in parallel with the first capacitor 131 are all in the working state , respectively collecting the voltage difference across the fourth capacitor 134 , the third capacitor 133 and the first capacitor 131 and outputting the fourth working voltage, the third working voltage and the first working voltage to the output interface 15 .
  • the fifth operating voltage threshold v5 is greater than the fourth operating voltage threshold v4.
  • the switch control module 11 After the switch control module 11 detects that the rectified voltage reaches the fifth operating voltage threshold v5, the first switch 121 is kept on and the second sub-switch 123 and the third sub-switch 124 are kept off, then the fourth capacitor 134 and the third capacitor 133 is connected to ground in series with the first capacitor 131 , that is, the power supply device supplies power to the load when the first power conversion module 141 , the third power conversion module 143 and the fourth power conversion module 144 are all in working state.
  • the switch control module 11 only controls the third sub-switch 124 to be turned on when the voltage value reaches the third operating voltage threshold v3 for the first time.
  • the switch control action of controlling the second sub-switch 123 and the first switch 121 to be disconnected the switch control module 11 only controls the second sub-switch 123 to be turned on when the voltage value reaches the fourth operating voltage threshold v4 for the first time, and The switch control action of controlling the third sub-switch 124 and the first switch 121 to be disconnected; the switch control module 11 only controls the first switch 121 to turn on and controls the first switch 121 only when the voltage value reaches the fifth operating voltage threshold v5 for the first time.
  • the switch control module 11 When the voltage value reaches the third operating voltage threshold v3 for the second time, the third time...the Nth time, the switch control module 11 no longer performs any switch control action. Similarly, when the voltage value reaches the fourth working voltage threshold v4 or the fifth working voltage threshold v5 for the second, third, ... Nth times, the switch control module 11 no longer performs any switch control action.
  • the peak value of the input voltage is usually fixed, and the peak value of the rectified voltage obtained by rectifying the input voltage is also a fixed value. Therefore, by detecting that the rectified voltage value reaches a certain threshold, the voltage threshold interval corresponding to the rectified voltage can be determined.
  • the voltage threshold interval can be The highest voltage threshold interval that the rectified voltage can reach in the multiple voltage threshold value intervals, to determine the circuit connection mode matching the input voltage, and to control the on or off of each switch, so that the multiple power conversion modules included in the power supply device can It works in a lower voltage range, so the power supply device can use devices with small impedance, small volume, low loss and low withstand voltage, thereby taking into account the requirements of wide input voltage and high power conversion efficiency.
  • both the wide input voltage requirement and the high power conversion efficiency requirement of the power supply device can be taken into account.
  • the reasons are as follows: The aforementioned embodiments of the power supply device including two capacitors are similar, and will not be repeated here.
  • the embodiment of the present application further discloses an electronic device, and the disclosed electronic device includes the power supply device described above.
  • the electronic devices referred to in the embodiments of the present application may be devices such as smart phones, tablet computers, e-book readers, and wearable devices, and the embodiments of the present application do not limit the specific types of electronic devices.

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  • Dc-Dc Converters (AREA)

Abstract

La présente demande divulgue un appareil d'alimentation électrique et un dispositif électronique, qui appartiennent au domaine technique de l'électronique. L'appareil d'alimentation électrique comprend un module de commande de commutateur, un premier commutateur, au moins un second commutateur, une pluralité de condensateurs et une pluralité de modules de conversion d'alimentation électrique du même nombre. La pluralité de condensateurs forme une connexion en série ; un premier condensateur est connecté à une tension d'entrée, deux condensateurs adjacents sont mis à la terre au moyen d'un second commutateur, et le dernier condensateur est mis à la terre au moyen du premier commutateur ; chaque module de conversion d'alimentation électrique forme une connexion parallèle avec un condensateur ; le module de commande de commutateur commande, en fonction de la tension d'entrée et au moyen du premier commutateur et de l'au moins un second commutateur, le nombre de modules de conversion d'alimentation électrique dans un état de fonctionnement, le nombre ayant une corrélation positive avec la tension d'entrée.
PCT/CN2022/073794 2021-01-28 2022-01-25 Appareil d'alimentation électrique et dispositif électronique WO2022161352A1 (fr)

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