CN112910220B - Power supply device and electronic apparatus - Google Patents
Power supply device and electronic apparatus Download PDFInfo
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- CN112910220B CN112910220B CN202110121740.0A CN202110121740A CN112910220B CN 112910220 B CN112910220 B CN 112910220B CN 202110121740 A CN202110121740 A CN 202110121740A CN 112910220 B CN112910220 B CN 112910220B
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- 239000003990 capacitor Substances 0.000 claims abstract description 247
- 238000006243 chemical reaction Methods 0.000 claims abstract description 143
- 238000000034 method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
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- 238000001914 filtration Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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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
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- 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
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- Direct Current Feeding And Distribution (AREA)
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Abstract
The application discloses a power supply device and electronic equipment belongs to electron technical field. The power supply device comprises a switch control module, a first switch, at least one second switch, a plurality of capacitors and a plurality of power conversion modules with the same quantity: the capacitors are connected in series; the first capacitor is connected with the input voltage, the adjacent two capacitors are grounded through a second switch, and the last capacitor is grounded through the first switch; each power conversion module is connected with one capacitor in parallel; the switch control module controls the number of the power conversion modules in an operating state through the first switch and the at least one second switch according to the input voltage, wherein the number is positively related to the input voltage. Through the technical scheme of the embodiment of the application, the power supply device can control the power supply conversion modules with different numbers to work under different input voltages and is in a smaller voltage range, so that the power supply device can adopt devices with low withstand voltage and high efficiency, and both the wide input voltage and the high electric energy conversion efficiency are considered.
Description
Technical Field
The application belongs to the field of electronic equipment, and particularly relates to a power supply device and electronic equipment.
Background
The power supply device comprises a power supply conversion module which can convert the input voltage of the power supply device into the working voltage required by the load of the power supply device. The selection requirements for the components of the power supply device are different when the input voltage of the power supply device is low and when the input voltage of the power supply device is high. In order to accommodate a larger range of input voltages, it is necessary to use a device having a high withstand voltage, resulting in a low power conversion efficiency of the power supply device.
In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: how to combine the wide input voltage and high power conversion efficiency of the power supply device.
Disclosure of Invention
An object of the embodiments of the present application is to provide a power supply device and an electronic apparatus, which can solve the problem of how to consider the wide input voltage and high power conversion efficiency of the power supply device.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, an embodiment of the present application provides a power supply apparatus, where the power supply apparatus includes a switch control module, a first switch, 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, where: the capacitors are connected in series; the first capacitor is connected with input voltage, the two adjacent capacitors are grounded through a second switch, and the last capacitor is grounded through the first switch; each power conversion module is connected with one capacitor in parallel; 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 related to the input voltage.
In a second aspect, embodiments of the present application provide an electronic device, including a power supply apparatus as described in the first aspect.
In an embodiment of the present application, a power supply device includes a switch control module, a first switch, 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: the capacitors are connected in series; the first capacitor is connected with input voltage, the two adjacent capacitors are grounded through a second switch, and the last capacitor is grounded through the first switch; each power conversion module is connected with one capacitor in parallel; 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 related to the input voltage. Through the technical scheme of the embodiment of the application, the power supply device can control the power supply conversion modules with different numbers to work under different input voltages, and each power supply conversion module works in a smaller voltage range, so that the power supply device can adopt a device with low withstand voltage value and high efficiency, and meanwhile, the wide input voltage and the high electric energy conversion efficiency of the power supply device are considered.
Drawings
Fig. 1 is a schematic structural diagram of a first power supply device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a second power supply device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a third power supply device according to an embodiment of the present disclosure;
fig. 4a is a voltage schematic diagram of a plurality of operating voltages received by an output interface in a power supply device according to an embodiment of the present disclosure;
fig. 4b is a schematic voltage diagram of the superimposed working voltage outputted by the output interface in the power supply device according to an embodiment of the present application.
Reference numerals:
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-direct voltage transmission, 19-filter capacitor.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The power supply device provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings by means of specific embodiments and application scenarios thereof.
Referring to fig. 1-4 b, a power supply device and an electronic device are provided in an embodiment of the present application. The power supply device includes a switch control module 11, a first switch 121, 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 have the same structure or may have different structures. When the number of the 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 transistors, metal oxide semiconductor field effect (MOS) transistors, relays, or the like, or may be a switching transistor composed of a plurality of devices. The capacitor may be a filter electrolytic capacitor.
The number of the at least one second switch may be one, two or more than two. The number of the plurality of capacitors may be a sum of the number of the first switches 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.
In an alternative embodiment of the power supply device, the number of the at least one second switch is larger than two, the power supply device is similar to the structure of the power supply device of fig. 3, and the number of the second switches, the capacitors and the power conversion modules are correspondingly increased on the basis of the structure of the power supply device of fig. 3. For example, the power supply device includes four second switches, and the power supply device includes five capacitors, and the power supply conversion modules include five capacitors. The embodiment of the power supply device shown in fig. 3 can be extended by increasing the number of second switches, capacitors and power conversion modules, enabling the power supply device to be adapted to a wider input voltage range.
The plurality of capacitors are connected in series.
And the first capacitor is connected with the input voltage, the adjacent two capacitors are grounded through a second switch, and the last capacitor is grounded through the first switch.
The first capacitor and the last capacitor may be a first capacitor and a last capacitor determined by sorting a plurality of capacitors connected in series according to a preset direction.
Each power conversion module is connected with one capacitor in parallel in the plurality of power conversion modules. The power conversion modules are in one-to-one correspondence with the capacitors, and each power conversion module is connected with the corresponding capacitor in parallel.
Optionally, the power supply device further includes: the rectifying module 17 is connected to the switch control module 11, and is configured to receive the input voltage and output the rectified voltage to the switch control module 11.
Referring to the embodiment shown in fig. 2 and 3, the input end of the rectifying module 17 is connected to the output end of the filtering module 16, and the output end of the rectifying module 17 is connected to the input end of the switch control module 11. The input voltage of the first capacitor may be the rectified voltage passing through the rectifying module 17 in this embodiment.
Referring to fig. 2 and 3, the input voltage of the first capacitive access may be a rectified voltage collected at HVDC (high voltage direct current transmission). The rectified voltage is obtained by rectifying the input voltage by the rectifying module 17. The high-voltage direct current transmission 18 is a high-power long-distance direct current transmission which is adopted by utilizing the advantages that stable direct current has no inductance, capacitance does not work, no synchronization problem exists and the like. In the embodiment of the present application, the hvdc transmission 18 may be regarded as a preset voltage value acquisition point for acquiring a voltage value.
Optionally, each of the plurality of power conversion modules is connected to the output interface 15.
Each power conversion module collects the voltage difference between two ends of the parallel-connected capacitors, converts the voltage difference, and outputs the converted working voltage to the output interface 15. If the absolute value of the collected voltage difference between the two ends of the parallel connected capacitors is greater than zero, the power conversion module is in an operating state, performs an operation of converting the collected voltage difference into an operating voltage, and outputs the operating voltage to the output interface 15.
When the number of the power conversion modules in the working state is one, the output interface 15 receives the working voltage provided by the power conversion modules and outputs the working voltage to supply power for the load of the power supply device; when the number of the power conversion modules in the working state is multiple, the output interface 15 receives multiple working voltages respectively provided by the power conversion modules in the working state, and the multiple working voltages are overlapped and output to supply power to the load of the power supply device.
Fig. 4a is a voltage schematic diagram of a plurality of operating voltages received by an output interface in a power supply device according to an embodiment of the present disclosure; fig. 4b is a schematic voltage diagram of the superimposed working voltage outputted by the output interface in the power supply device according to an embodiment of the present application.
Referring to the voltage schematic shown in fig. 4a, the first operating voltage waveform 402 may represent a voltage waveform of a first operating voltage output by a first power conversion module in an operating state, and the second voltage waveform 404 may represent a voltage waveform of a second operating voltage output by a second power conversion module in an operating state. The two voltage waveforms may be superimposed by comparing the voltage values corresponding to the two voltage waveforms at each time point, and taking the larger one of the comparison results as the voltage value corresponding to the superimposed output waveform at the time point. Referring to fig. 4b, the first operating voltage waveform 402 is superimposed with the second operating voltage waveform 404 to obtain an output voltage waveform 406.
The manner in which more than two voltage waveforms are superimposed is similar to the manner in which two voltage waveforms are superimposed, and will not be described again here.
When the number of the power conversion modules in the working state is multiple, the output voltage waveform is smaller in ripple compared with the multiple working voltage waveforms, and the output voltage waveform is more stable when the load is powered.
It should be noted that, in an alternative embodiment of the power supply device, referring to fig. 4a, the number of power conversion modules in an operating state is two, the voltage waveforms of the output operating voltages are a first operating voltage waveform 402 and a second operating voltage waveform 404, respectively, and when the phase difference between the first operating voltage waveform 402 and the second operating voltage waveform 404 is pi/2, the ripple of the output waveform 406 obtained by superposition is minimum, as shown in fig. 4 b.
Referring to fig. 4a, when the phase difference between the first operating voltage waveform 402 and the second operating voltage waveform 404 is pi/2, the second operating voltage waveform 404 is at a minimum value at a point of time when the first operating voltage waveform 402 is at a maximum value; at the point in time when the second operating voltage waveform 404 is at a minimum, the first operating voltage waveform 402 is at a maximum.
In an alternative embodiment of the power supply device, a plurality of active power conversion modules are communicatively coupled.
The communication connection may be performed by referring to fig. 2, where the first power conversion module 141 in a working state initiates a communication handshake to the second power conversion module; when the second power conversion module 142 is in a working state, responding to the handshake, and enabling the phase difference corresponding to the second power conversion module 142 and the first power conversion module 141 to be pi/2 by controlling the switching frequency; when the second power conversion module 142 is in the non-operating state, the handshake cannot be responded, and the first power conversion module 141 continues to operate.
Through the mode of communication connection, each power conversion module can be through obtaining the voltage waveform that the voltage difference that other power conversion modules gathered corresponds, then according to the voltage waveform that the voltage difference that other power conversion modules gathered corresponds, control the switching frequency of the switch that connects with corresponding electric capacity, make the phase difference between the voltage waveform that a plurality of power conversion modules that are in operating condition correspond be preset numerical value, for example pi/2. By the technical means, output waveform waves obtained by superposition of the output interfaces 15 can be smaller, and stability of power supply to loads is improved.
Optionally, each power conversion module of the plurality of power conversion modules is connected with the filter capacitor; the filter capacitor is grounded.
Referring to the embodiment of fig. 2 and 3, the filter capacitor 19 is used to make the voltage waveform output by the output interface smoother, so as to improve 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 application can be an output waveform obtained by overlapping the working waveforms output by the power conversion modules in the working states, so that the output waveform has the advantage of small ripple, on the basis, the filter capacitor 19 can also select a capacitor device with a smaller capacitance value, the hardware requirement of device selection is reduced, and the loss of electric energy is reduced.
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 related to the input voltage.
The input voltage may be an ac voltage, and the number of series-connected capacitors increases as the voltage increases during the period from zero to the peak value of the ac voltage.
In some embodiments, the switch control module 11 may further control the on and off of the first switch 121 and the at least one second switch according to a rectified voltage obtained by rectifying an input voltage, so as to control the number of series-connected conductive capacitors, where the number of series-connected conductive capacitors is positively related to the rectified voltage. The rectified voltages are all non-negative.
Two specific embodiments are described below:
referring to fig. 1 and 2, an embodiment of a power supply device including two capacitors and two power conversion modules is specifically described.
Optionally, the at least one second switch comprises a first sub-switch 122; the plurality of capacitors includes a first capacitor 131 and a second capacitor 132; the plurality of power conversion modules includes a first power conversion module 141 and a second power conversion module 142; the first capacitor 131 is connected in series with the second capacitor 132; the second capacitor 132 is connected to the input voltage; the first capacitor 131 and the second capacitor 132 are grounded through the first sub-switch 122; 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 second power conversion module 142 is connected in parallel with the second capacitor 132.
In one or more embodiments as shown in fig. 1 and 2, the number of the at least one second switch is one, i.e. the at least one second switch includes a first sub-switch 122, and the power supply device includes a first switch 121 and a first sub-switch 122. The number of the plurality of capacitors is two, i.e., the plurality of capacitors includes a first capacitor 131 and a second capacitor 132. The number of the plurality of power conversion modules is the same as the number of the plurality of capacitors, i.e., the plurality of power conversion modules includes 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 is grounded to the first capacitor 131 through the first sub-switch 122, which 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, the second capacitor 132 is grounded, and one end 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, and the first power conversion module 141 collects a voltage difference between two ends of the first capacitor 131, converts the voltage difference, and outputs a first working voltage to the output interface 15. The second power conversion module 142 is connected in parallel with the second capacitor 132, and the second power conversion module 142 collects a voltage difference between two ends of the second capacitor 132, converts the voltage difference, and outputs a first operating voltage to the output interface 15.
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 an operating state. When the second capacitor is connected to the ground in series with the first capacitor, the absolute value of the voltage difference between the two ends of the second capacitor 132 is greater than zero, and the absolute value of the voltage difference between the two ends of the first capacitor 131 is greater than zero, and at this time, the first power conversion module 141 and the second power conversion module 142 are both in a working state.
Optionally, when detecting that the rectified voltage reaches the first operating voltage threshold, the switch control module 11 controls the first sub-switch 122 to be turned on and controls the first switch 121 to be turned off, so that the second capacitor 132 is grounded; when the rectified voltage reaches the second working voltage threshold, the switch control module 11 controls the first switch 121 to be turned on and controls the first sub-switch 122 to be turned off, so that the first capacitor 131 and the second capacitor 132 are connected in series to the ground; 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 in which the first switch 121 is kept 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 value of the rectification voltage is non-negative, the rectification voltage starts to rise from zero until the peak value of the voltage waveform, the voltage waveform falls from the peak value to zero, the voltage waveform rises from zero to the peak value again, and the voltage waveform falls from the peak value to zero … …, and the process of rising and falling of the voltage value is repeated continuously.
The initial states of the first switch 121 and the first sub-switch 122 may be the off state. Neither the first capacitor 131 nor the second capacitor 132 is grounded and the power supply device is in a non-operating state.
The switch control module 11 receives the rectified voltage, and when the voltage value of the rectified voltage is smaller than the first operating voltage threshold v1, the switch control module 11 is in a non-operating state, and does not perform any control on the first switch 121 or the first sub-switch 122. Here, the first operation voltage threshold v1 may be a start voltage threshold at which the switch control module 11 starts operation.
When the switch control module 11 detects that the rectified voltage reaches the first working voltage threshold v1, the switch control module 11 controls the first sub-switch 122 to be turned on and controls the first switch 121 to be turned off, so that the second capacitor 132 is grounded, and at this time, the second power conversion module 142 connected in parallel with the second capacitor 132 is in a working state, and collects the voltage difference between two ends of the second capacitor 132 and outputs the second working voltage to the output interface 15.
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 controls the first sub-switch 122 to be turned off, so that the first capacitor 131 and the second capacitor 132 are connected in series to the 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 an operating state, and respectively collect the voltage differences between the two ends of the first capacitor 131 and the second capacitor 132 and output the first operating voltage and the second operating voltage to the output interface 15. And the second operating voltage threshold v2 is greater than the first operating voltage threshold v1.
After the switch control module 11 detects that the rectified voltage reaches the second operating voltage threshold v2, the first switch 121 remains turned on and the first sub-switch 122 remains turned off, so that the first capacitor 131 and the second capacitor 132 remain connected in series to the ground, that is, the power supply device supplies power to the load under the condition that the first power supply conversion module 141 and the second power supply conversion module 142 are both in an operating state.
It should be noted that, although the voltage value of the rectified voltage continuously repeats the process of increasing and decreasing the voltage value, the switch control module 11 performs the switch control operation of controlling the first sub-switch 122 to be turned on and controlling the first switch 121 to be turned off only when the voltage value reaches the first operating voltage threshold v1 for the first time, and performs the switch control operation of controlling the first switch 121 to be turned on and controlling the first sub-switch 122 to be turned off when the voltage value reaches the second operating voltage threshold v2 for the first time. When the voltage value reaches the first operating voltage threshold v1 for the second and third times … …, the switch control module 11 does not perform any switch control actions. Similarly, when the voltage value reaches the second operating voltage threshold v2 for the second time and the nth time of the third time … …, the switch control module 11 does not perform any switch control actions.
By controlling the on or off of the first switch 121 and the first sub-switch 122 at different input voltages, the requirements of the power supply device for a wide input voltage and a high power conversion efficiency can be satisfied for the following reasons:
when the input voltage is low, for example, when the voltage value of the rectified voltage is greater than or equal to the first operating voltage threshold v1 and less than the second operating voltage threshold v2, only the second capacitor 132 is grounded in the power supply device, so when the input voltage is low, the power supply device controls the on and off of the first switch 121 and the first sub-switch 122, controls the number of capacitors to be turned on in series, and the second power conversion module 142 connected in parallel with the second capacitor 132 is in an operating state, so as to output electric energy to the output interface 15. At this time, a second power conversion module is adopted to supply power to the load.
When the input voltage is high, for example, when the voltage value of the rectified voltage is equal to or greater than the second operating voltage threshold v2, the first capacitor 131 and the second capacitor 132 in the power supply device are connected in series to the ground. Therefore, when the input voltage is high, the power supply device controls the on/off of the first switch 121 and the first sub-switch 122, and the number of the control capacitors connected in series is two, so that the first power conversion module 141 connected in parallel with the first capacitor 131 is in an operating state, outputs electric energy to the output interface 15, and the second power conversion module 142 connected in parallel with the second capacitor 132 is in an operating state, and outputs electric energy to the output interface 15. The two power conversion modules supply power to the output interface at the same time, and the two power conversion modules work in a smaller voltage range, so the stress requirements of devices inside the power conversion modules are smaller, and the power supply device has the obvious advantages of small impedance, small volume, small loss, low voltage resistance and the like, and therefore the power supply device can effectively improve the electric energy conversion efficiency of the power supply device by adopting the devices with smaller stress requirements.
Next, an embodiment of a power supply device including three capacitors is specifically described with reference to fig. 1 and 3.
Optionally, the at least one second switch comprises a second sub-switch 123 and a third sub-switch 124; the plurality of capacitors includes a first capacitor 131, a third capacitor 133, and a fourth capacitor 134; 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 first capacitor 131, the third capacitor 133, and the fourth capacitor 134 are connected in series; the fourth capacitor 134 is connected to the input voltage; the third capacitor 133 and the fourth capacitor 134 are grounded through the third sub-switch 124; the first capacitor 131 and the third capacitor 133 are grounded through the second sub-switch 123; 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.
In one or more embodiments as shown in fig. 1 and 3, the at least one second switch is two in number, i.e. the at least one second switch comprises a second sub-switch 123 and a third sub-switch 124, and the power supply device comprises a first switch 121, a second sub-switch 123 and a third sub-switch 124. The number of the plurality of capacitors is three, i.e., the plurality of capacitors includes 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 includes 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 is grounded to the first capacitor 131 through the first sub-switch 122, which 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, the second capacitor 132 is grounded, and one end 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, which means 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 other end of the fourth capacitor 134 connected to the third sub-switch 124 is grounded, and is connected to the third capacitor 133.
The third capacitor 133 is adjacent to the first capacitor 131. The third capacitor 133 is grounded through the second sub-switch 123, which means 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, the other end of the third capacitor 133 connected to the second sub-switch 123 is grounded, and the first capacitor 131 is connected to the third capacitor 133.
The first capacitor 131 is grounded through the first switch 121.
Optionally, when detecting that the rectified voltage reaches the third operating voltage threshold, 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; when the rectified voltage reaches the fourth working voltage threshold, the switch control module 11 controls the second sub-switch 123 to be turned on and controls the third sub-switch 124 to be turned off from the first switch 121, so that the fourth capacitor 134 and the third capacitor 133 are connected in series to the ground; wherein the fourth operating voltage threshold is greater than the third operating voltage threshold; when the rectified voltage reaches the fifth working voltage threshold, 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 in series to be grounded; wherein the fifth operating voltage threshold is greater than the fourth operating voltage threshold; after the rectified voltage reaches the fifth operating voltage threshold, the power supply device supplies power to the load in a state in which the first switch 121 is kept 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 value of the rectified voltage is non-negative, and the voltage value of the rectified voltage starts to rise from zero until the peak value of the voltage waveform, and falls from the peak value to zero, and rises from zero to the peak value again, and the process of rising and falling the voltage value from the peak value to zero … … is repeated continuously.
The initial states of the first switch 121, the second sub-switch 123, and the third sub-switch 124 may be the off state. In the initial state, the first capacitor 131, the third capacitor 133 and the fourth capacitor 134 are not grounded, and the power device is in the non-working state.
The switch control module 11 receives the rectified voltage, and when the voltage value of the rectified voltage is smaller than the third operating voltage threshold v3, the switch control module 11 is in a non-operating state, and does not perform any control on the first switch 121, the second sub-switch 123 or the third sub-switch 124. Here, the third operation voltage threshold v3 may be a start voltage threshold at which the switch control module 11 starts operation.
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 an operating state, and collects the voltage difference between the two ends of the fourth capacitor 134 and outputs a fourth operating voltage to the output interface 15
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 and the third capacitor 133 are connected in series to the ground. At this time, 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 an operating state, and respectively collect the voltage differences between the two ends of the fourth capacitor 134 and the third capacitor 133 and output the fourth operating voltage and the third operating voltage to the output interface 15. And the fourth operating voltage threshold v4 is greater than the third operating voltage threshold v3.
When the switch control module 11 detects that the rectified voltage reaches the fifth working 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 and the third capacitor 133 are connected with the first capacitor 131 in series. At this time, 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 an operating state, and respectively collect voltage differences between two ends of the fourth capacitor 134, the third capacitor 133, and the first capacitor 131 and output a fourth operating voltage, a third operating voltage, and the first operating voltage to the output interface 15. And the fifth operating voltage threshold v5 is greater than the fourth operating voltage threshold v4.
After the switch control module 11 detects that the rectified voltage reaches the fifth operating voltage threshold v5, the first switch 121 remains turned on and the second sub-switch 123 and the third sub-switch 124 remain turned off, so that the fourth capacitor 134, the third capacitor 133 and the first capacitor 131 remain connected in series to ground, i.e. the power supply device supplies power to the load under the condition that the first power conversion module 141, the third power conversion module 143 and the fourth power conversion module 144 are all in an operating state.
It should be noted that, although the voltage value of the rectified voltage continuously repeats the process of increasing and decreasing the voltage value, the switch control module 11 performs the switch control action of controlling the third sub-switch 124 to be turned on and controlling the second sub-switch 123 and the first switch 121 to be turned off only when the voltage value reaches the third operating voltage threshold v3 for the first time; the switch control module 11 performs a switch control action of controlling the second sub-switch 123 to be turned on and controlling the third sub-switch 124 to be turned off with the first switch 121 only when the voltage value reaches the fourth operating voltage threshold v4 for the first time; the switch control module 11 performs a switch control operation of controlling the first switch 121 to be turned on and controlling the second sub-switch 123 and the third sub-switch 124 to be turned off only when the voltage value reaches the fifth operating voltage threshold v5 for the first time. When the voltage value reaches the third operating voltage threshold v3 for the second and third times … …, the switch control module 11 does not perform any switch control actions. Similarly, when the voltage value reaches the fourth operating voltage threshold v4 or the fifth operating voltage threshold v5 for the second time, the third time … …, and the nth time, the switch control module 11 does not perform any switch control actions.
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, so that the voltage threshold interval corresponding to the rectified voltage can be determined by detecting that the rectified voltage value reaches a specific threshold value, the voltage threshold interval can be the highest voltage threshold interval reached by the rectified voltage in a plurality of voltage threshold intervals, the connection mode of a circuit matched with the input voltage is determined, and the on/off of each switch is controlled, so that a plurality of power conversion modules contained in the power supply device can work in a lower voltage range, and the power supply device can adopt devices with small impedance, small volume, small loss and low withstand voltage, thereby meeting the requirements of wide input voltage and high power conversion efficiency.
By controlling the on/off of the first switch 121, the second sub-switch 123 and the third sub-switch 124 under different input voltages, the requirements of the power supply device for wide input voltage and high power conversion efficiency can be satisfied, for similar reasons to the aforementioned embodiments of the power supply device including two capacitors, the description thereof will not be repeated.
Based on the power supply device disclosed in the embodiment of the application, the embodiment of the application also discloses an electronic device, and the disclosed electronic device comprises the power supply device. The electronic device referred to in the embodiments of the present application may be a smart phone, a tablet computer, an electronic book reader, a wearable device, or other devices, and the embodiments of the present application do not limit specific types of electronic devices.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), including several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method of the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (10)
1. A power supply device, characterized in that the power supply device comprises a switch control module, a first switch, at least one second switch, a plurality of capacitors and a plurality of power conversion modules with the same number of the capacitors, wherein:
the plurality of capacitors are connected in series;
the first capacitor is connected with the input voltage, the two adjacent capacitors are grounded through one second switch, and the last capacitor is grounded through the first switch;
each power conversion module is connected with one capacitor in parallel in the plurality of power conversion modules;
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 related to the input voltage;
the number of the series connection conduction of the capacitors increases with the voltage;
the power conversion modules are in communication connection and are used for acquiring voltage waveforms corresponding to the voltage differences acquired by the other power conversion modules; and controlling the switching frequency of a switch connected with the corresponding capacitor according to voltage waveforms corresponding to the voltage differences acquired by other power conversion modules, so that the phase difference between the voltage waveforms corresponding to the power conversion modules in the working state is a preset value.
2. The power supply device according to claim 1, wherein,
and each power conversion module in the plurality of power conversion modules is connected with an output interface.
3. The power supply device according to claim 1, characterized in that the power supply device further comprises:
and the rectification module is connected with the switch control module and is used for receiving the input voltage and outputting the rectified voltage to the switch control module.
4. A power supply arrangement according to claim 3, wherein the at least one second switch comprises a first sub-switch; the plurality of capacitors includes a first capacitor and a second capacitor; the plurality of power conversion modules comprise a first power conversion module and a second power conversion module;
the first capacitor is connected with the second capacitor in series;
the second capacitor is connected to the input voltage;
the first sub-switch is grounded through the first capacitor and the second capacitor;
the first capacitor is grounded through the first switch;
the first power conversion module is connected with the first capacitor in parallel;
the second power conversion module is connected with the second capacitor in parallel.
5. A power supply arrangement according to claim 3, wherein the at least one second switch comprises a second sub-switch and a third sub-switch; the plurality of capacitors includes a first capacitor, a third capacitor, and a fourth capacitor; the plurality of power conversion modules comprise a first power conversion module, a third power conversion module and a fourth power conversion module;
the first capacitor, the third capacitor and the fourth capacitor are connected in series;
the fourth capacitor is connected to the input voltage;
the third sub-switch is grounded through the third sub-switch between the third capacitor and the fourth capacitor;
the first capacitor and the third capacitor are grounded through the second sub-switch;
the first capacitor is grounded through the first switch;
the first power conversion module is connected with the first capacitor in parallel;
the third power conversion module is connected with the third capacitor in parallel;
the fourth power conversion module is connected with the fourth capacitor in parallel.
6. The power supply device according to claim 4, wherein,
when the rectified voltage is detected to reach a first working voltage threshold, the switch control module controls the first sub-switch to be conducted and controls the first switch to be disconnected, so that the second capacitor is grounded;
when the rectified voltage is detected to reach a second working voltage threshold, the switch control module controls the first switch to be conducted and controls the first sub-switch to be disconnected, so that the first capacitor and the second capacitor are connected in series to be grounded; wherein the second operating voltage threshold is greater than the first operating voltage threshold;
after the rectified voltage reaches the second working voltage threshold, the power supply device supplies power to a load in a state that the first switch is kept on and the first sub-switch is turned off.
7. The power supply device according to claim 5, wherein,
when the rectified voltage reaches a third working voltage threshold, the switch control module controls the third sub-switch to be conducted, and controls the second sub-switch and the first switch to be disconnected, so that the fourth capacitor is grounded;
when the rectified voltage reaches a fourth working voltage threshold, the switch control module controls the second sub-switch to be conducted and controls the third sub-switch and the first switch to be disconnected, so that the fourth capacitor and the third capacitor are connected in series to be grounded; wherein the fourth operating voltage threshold is greater than the third operating voltage threshold;
when the rectified voltage is detected to reach a fifth working voltage threshold, the switch control module controls the first switch to be conducted, and controls the second sub switch and the third sub switch to be disconnected, so that the fourth capacitor, the third capacitor and the first capacitor are connected in series to the ground; wherein the fifth operating voltage threshold is greater than the fourth operating voltage threshold;
after the rectified voltage reaches the fifth working voltage threshold, the power supply device supplies power to a load in a state that the first switch is kept on and the second sub-switch and the third sub-switch are disconnected.
8. The power supply device according to claim 4, wherein,
the first power conversion module is in communication connection with the second power conversion module.
9. The power supply device according to claim 1, wherein,
each power conversion module in the plurality of power conversion modules is connected with a filter capacitor;
the filter capacitor is grounded.
10. An electronic device comprising the power supply apparatus according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110121740.0A CN112910220B (en) | 2021-01-28 | 2021-01-28 | Power supply device and electronic apparatus |
| PCT/CN2022/073794 WO2022161352A1 (en) | 2021-01-28 | 2022-01-25 | Power supply apparatus and electronic device |
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| CN202110121740.0A CN112910220B (en) | 2021-01-28 | 2021-01-28 | Power supply device and electronic apparatus |
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| CN112910220B (en) * | 2021-01-28 | 2023-07-25 | 维沃移动通信有限公司 | Power supply device and electronic apparatus |
| CN113992014A (en) * | 2021-10-29 | 2022-01-28 | 广东电网有限责任公司广州供电局 | Optimal control method and device for ISOP type direct current transformer and storage medium |
| CN113972721B (en) * | 2021-10-29 | 2024-07-02 | 维沃移动通信有限公司 | Wireless charging circuit, method, device, electronic equipment and storage medium |
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