CN112910220A - Power supply device and electronic apparatus - Google Patents
Power supply device and electronic apparatus Download PDFInfo
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- CN112910220A CN112910220A CN202110121740.0A CN202110121740A CN112910220A CN 112910220 A CN112910220 A CN 112910220A CN 202110121740 A CN202110121740 A CN 202110121740A CN 112910220 A CN112910220 A CN 112910220A
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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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Abstract
The application discloses power supply unit 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 supply conversion modules with the same quantity: a plurality of capacitors connected in series; the first capacitor is connected with input voltage, two adjacent capacitors are grounded through a second switch, and the last capacitor is grounded through a first switch; each power conversion module is connected with a capacitor in parallel; the switch control module controls the number of the power supply conversion modules in the working state through the first switch and the at least one second switch according to the input voltage, wherein the number is positively correlated with the input voltage. Through the technical scheme of this application embodiment, can make power supply unit control the work of the power conversion module of different quantity under different input voltage, and all at less voltage range for power supply unit can adopt low withstand voltage value and efficient device, compromises wide input voltage and high electric energy conversion efficiency.
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, and the power supply conversion module can convert the input voltage of the power supply device into the working voltage required by the load of the power supply device. The requirements for the selection of components of the power supply apparatus differ when the input voltage of the power supply apparatus is low and when it is high. In order to adapt to a larger numerical range of input voltage, a device with a high withstand voltage value needs to be adopted, so that the electric energy conversion efficiency of the power supply device is low.
In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: how to compromise the wide input voltage and the 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 both the wide input voltage and the high power conversion efficiency of the power supply device.
In order to solve the technical problem, the present application is implemented 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, where the number of the power conversion modules is the same as that of the plurality of capacitors, where: a plurality of capacitors connected in series; in the plurality of capacitors, a first capacitor is connected with an input voltage, two adjacent capacitors are grounded through a second switch, and a last capacitor is grounded through a first switch; each power conversion module is connected with a capacitor in parallel; the switch control module controls the number of the power supply 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 supply conversion modules in the working state is positively correlated with the input voltage.
In a second aspect, an embodiment of the present application provides an electronic device, including the power supply apparatus according to the first aspect.
In an embodiment of the present application, a power supply apparatus 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: a plurality of capacitors connected in series; in the plurality of capacitors, a first capacitor is connected with an input voltage, two adjacent capacitors are grounded through a second switch, and a last capacitor is grounded through a first switch; each power conversion module is connected with a capacitor in parallel; the switch control module controls the number of the power supply 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 supply conversion modules in the working state is positively correlated with the input voltage. Through the technical scheme of this application embodiment, can make power supply unit control the work of the power conversion module of different quantity under the input voltage of difference, and each power conversion module all works in a less voltage range for power supply unit can adopt low withstand voltage value and efficient device, compromises power supply unit's wide input voltage and high electric energy conversion efficiency simultaneously.
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 apparatus according to an embodiment of the present disclosure;
fig. 4a is a schematic voltage diagram of a plurality of operating voltages received by an output interface in a power supply apparatus according to an embodiment of the present application;
fig. 4b is a schematic voltage diagram of a superimposed operating voltage output by an output interface in a 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 current voltage transmission and 19-filter capacitor.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The power supply device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings by specific embodiments and application scenarios thereof.
Referring to fig. 1 to 4b, an embodiment of the present application provides a power supply device and an electronic apparatus. 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 configuration, or may have different configurations. When the number of the at least one second switch is greater than one, the plurality of second switches may be switches having the same structure, or switches having different structures. The first switch 121 and the second switch may be a transistor, a metal oxide semiconductor field effect (MOS) transistor, a relay, or a switch tube composed of multiple 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 apparatus, the number of the at least one second switch is greater than two, the power supply apparatus has a structure similar to that of the power supply apparatus in fig. 3, and the number of the second switches, the capacitors and the power conversion modules is correspondingly increased based on the structure of the power supply apparatus in fig. 3. For example, the power supply device includes four second switches, five capacitors, and five power conversion modules. The embodiment of the power supply apparatus shown in fig. 3 is extended by increasing the number of the second switches, capacitors, and power conversion modules, enabling the power supply apparatus to be adapted to a wider input voltage range.
A plurality of capacitors are connected in series.
In the plurality of capacitors, a first capacitor is connected with an input voltage, two adjacent capacitors are grounded through a second switch, and a last capacitor is grounded through a first switch.
The first capacitor and the last capacitor may be the first capacitor and the last capacitor determined by sorting the plurality of capacitors connected in series in a preset direction.
In the plurality of power conversion modules, each power conversion module is connected in parallel with a capacitor. The plurality of power conversion modules correspond to the plurality of capacitors one by one, and each power conversion module is connected with the corresponding capacitor in parallel.
Optionally, the power supply device further comprises: and the rectifying module 17 is connected with the switch control module 11 and is used for receiving the input voltage and outputting the rectified voltage to the switch control module 11.
Referring to the embodiment shown in fig. 2 and 3, the input terminal of the rectifying module 17 is connected to the output terminal of the filtering module 16, and the output terminal of the rectifying module 17 is connected to the input terminal of the switch control module 11. The input voltage of the first capacitor may be a rectified voltage passing through the rectifier module 17 in this embodiment.
Referring to fig. 2 and 3, the input voltage of the first capacitor may be a rectified voltage collected at HVDC (high voltage direct current transmission). The rectified voltage is obtained by rectifying the input voltage through the rectifying module 17. The high-voltage direct-current transmission 18 is high-power long-distance direct-current transmission which is adopted by utilizing the advantages that stable direct current has no inductive reactance, capacitive reactance does not work, no synchronization problem and the like. In the embodiment of the present application, the hvdc transmission 18 may be regarded as a preset voltage value collecting point for collecting 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 the two ends of the capacitor connected in parallel, 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 capacitor is greater than zero, the power conversion module is in a working state, performs an action of converting the collected voltage difference into a working voltage, and outputs the working 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 to the load of the power supply device; when the number of the power conversion modules in the operating state is multiple, the output interface 15 receives multiple operating voltages respectively provided by the multiple power conversion modules in the operating state, superimposes and outputs the multiple operating voltages, and supplies power to a load of the power supply device.
Fig. 4a is a schematic voltage diagram of a plurality of operating voltages received by an output interface in a power supply apparatus according to an embodiment of the present application; fig. 4b is a schematic voltage diagram of a superimposed operating voltage output by an output interface in a power supply device according to an embodiment of the present application.
Referring to the voltage diagram of fig. 4a, a 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 a 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 of the two voltage waveforms at the respective time points, and taking the larger one of the comparison results as the voltage value of the superimposed output waveform at the time point. Referring to fig. 4b, the first operating voltage waveform 402 and the second operating voltage waveform 404 are superimposed to obtain an output voltage waveform 406.
The manner of superimposing more than two voltage waveforms is similar to the manner of superimposing two voltage waveforms, and is not described herein again.
When the number of the power conversion modules in the working state is multiple, compared with the multiple working voltage waveforms, the output voltage waveform has smaller ripple and is more stable when power is supplied to a load.
It should be noted that, in an alternative embodiment of the power supply apparatus, referring to fig. 4a, the number of the power conversion modules in the operating state is two, the voltage waveforms of the output operating voltages are the first operating voltage waveform 402 and the 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 superimposed output waveform 406 is the smallest, 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 at a point of time when the first operating voltage waveform 402 is at a maximum; at a 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 apparatus, a plurality of power conversion modules in an active state are communicatively connected.
The communication connection may be, as shown in fig. 2, that 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 a working state, responding to the handshake, and controlling the switching frequency to make the phase difference between the second power conversion module 142 and the first power conversion module 141 be pi/2; when the second power conversion module 142 is in the non-operating state, the first power conversion module 141 continues to operate without responding to the handshake.
Through the mode of communication connection, each power conversion module can control the switching frequency of the switch connected with the corresponding capacitor according to the voltage waveforms corresponding to the voltage differences acquired by other power conversion modules by acquiring the 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 plurality of power conversion modules in the working state is a preset value, such as pi/2. By the technical means, the output waveform ripple obtained by superposing the output interface 15 is small, and the stability of power supply for the load is improved.
Optionally, each of the plurality of power conversion modules is connected to a filter capacitor; the filter capacitor is grounded.
Referring to the embodiment of fig. 2 and 3, the filter capacitor 19 is used to smooth the voltage waveform output from the output interface, and to improve stability when supplying power to the load of the power supply apparatus.
The voltage waveform output by the output interface in the embodiment of the application can be an output waveform obtained by superposing working waveforms output by a plurality of power conversion modules in working states, so that the output waveform has the advantage of small ripple, and on the basis, the filter capacitor 19 can also select a capacitor device with a smaller capacitance value, so that the hardware requirement for selecting the device is reduced, and the loss of electric energy is reduced.
The switch control module controls the number of the power supply 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 supply conversion modules in the working state is positively correlated with the input voltage.
The input voltage may be an alternating voltage, and the amount of series conduction of the capacitor increases as the voltage increases during the time that the input voltage rises from zero to the peak of the alternating voltage.
In some embodiments, the switch control module 11 may further control the first switch 121 and the at least one second switch to be turned on and off according to a rectified voltage obtained by rectifying the input voltage to control the number of capacitors that are turned on in series, which is directly related to the rectified voltage. The rectified voltage is all non-negative.
Two specific embodiments are described below:
referring to fig. 1 and 2, an embodiment of a power supply apparatus 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 include 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 with the input voltage; between the first capacitor 131 and the second capacitor 132, the ground is connected 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 fig. 2, the number of the at least one second switch is one, that is, the at least one second switch includes a first sub-switch 122, and the power supply device includes a first switch 121 and the first sub-switch 122. The number of the plurality of capacitors is two, that is, 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, that is, 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, and it can be understood that one end of the second capacitor 132 is connected to the first sub-switch 122, and the first sub-switch 122 is grounded when turned on, and one end of the second 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, 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 to 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 the first working 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 a working state. When the second capacitor and the first capacitor are grounded in series, 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, at this time, both the first power conversion module 141 and the second power conversion module 142 are 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 detecting that 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 grounded 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 while keeping the first switch 121 on and the first sub-switch 122 off.
The rectified voltage may be a voltage obtained by rectifying an ac voltage. The rectified voltage has a non-negative voltage value, and the rectified voltage rises from zero until the peak of the voltage waveform, falls from the peak to zero, rises from zero to the peak again, and repeats the process of rising and falling from the peak to zero … ….
The initial state of the first switch 121 and the first sub-switch 122 may be an 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 the non-operating state and does not perform any control on the first switch 121 or the first sub-switch 122. Here, the first operating voltage threshold v1 may be a start voltage threshold for starting the operation of the switch control module 11.
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, collects a 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 grounded in series. 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 a working state, and respectively collect voltage differences between two ends of the first capacitor 131 and the second capacitor 132 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 v 1.
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, so that the first capacitor 131 and the second capacitor 132 remain connected in series to ground, i.e. the power supply apparatus supplies power to the load when the first power conversion module 141 and the second power conversion module 142 are both in the operating state.
It should be noted that although the voltage value of the rectified voltage repeats the process of the voltage value rising and falling, the switch control module 11 only executes the switch control action of controlling the first sub-switch 122 to be turned on and controlling the first switch 121 to be turned off when the voltage value reaches the first operating voltage threshold v1 for the first time, and executes the switch control action 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 … … nth time, the switch control module 11 does not perform any switching control actions. Similarly, when the voltage value reaches the second operating voltage threshold v2 for the second time and the third time … … for the nth time, the switch control module 11 does not perform any switching control action.
By controlling the on/off of the first switch 121 and the first sub-switch 122 at different input voltages, the wide input voltage requirement and the high power conversion efficiency requirement of the power supply device 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 in the power supply device is grounded, and therefore, when the input voltage is low, the power supply device controls the first switch 121 and the first sub-switch 122 to be turned on and off, and controls the number of capacitors to be turned on in series to be one, 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. At the moment, a second power supply 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 value v2, the first capacitor 131 and the second capacitor 132 in the power supply device are connected in series to ground. Therefore, when the input voltage is high, the power supply apparatus controls the first switch 121 and the first sub-switch 122 to be turned on and off, and controls the number of the capacitors connected in series to be two, so that the first power conversion module 141 connected in parallel to the first capacitor 131 is in an operating state to output the electric energy to the output interface 15, and the second power conversion module 142 connected in parallel to the second capacitor 132 is in an operating state to output the electric energy to the output interface 15. The two power conversion modules simultaneously supply power to the output interface, and the two power conversion modules work in a smaller voltage range, so that the stress requirement of devices in the power conversion modules is smaller, and the power conversion modules have 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 requirement.
Next, referring to fig. 1 and 3, an embodiment of a power supply device including three capacitors is specifically described.
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 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 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 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, and it can be understood that one end of the second capacitor 132 is connected to the first sub-switch 122, and the first sub-switch 122 is grounded when turned on, and one end of the second 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 connected to ground, 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 end of the fourth capacitor 134 connected to the third sub-switch 124 is connected to ground, and the other end of the third capacitor 133 is connected to the third sub-switch 124.
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 connected to ground, 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, the end of the third capacitor 133 connected to the second sub-switch 123 is connected to ground, and the first capacitor 131.
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 detecting that 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 and the first switch 121 to be turned off, so that the fourth capacitor 134 and the third capacitor 133 are grounded in series; wherein the fourth operating voltage threshold is greater than the third operating voltage threshold; when detecting that 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 grounded in series; 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 apparatus supplies power to the load while keeping the first switch 121 on and the second and third sub-switches 123 and 124 off.
The rectified voltage may be a voltage obtained by rectifying an ac voltage. The voltage value of the rectified voltage is all non-negative, and the voltage value of the rectified voltage rises from zero until the peak value of the voltage waveform, falls from the peak value to zero, rises from zero to the peak value again, and the rising and falling processes of the voltage value are repeated from the peak value to zero … ….
The initial states of the first switch 121, the second sub-switch 123, and the third sub-switch 124 may be off states. In the initial state, the first capacitor 131, the third capacitor 133 and the fourth capacitor 134 are not grounded, and the power supply device is in the 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 third operating voltage threshold value v3, the switch control module 11 is in the 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 operating voltage threshold v3 may be a start voltage threshold for starting the operation of 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 between the two ends of the fourth capacitor 134 and outputs the fourth working 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 grounded in series. 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 a working state, and respectively collect voltage differences between the two ends of the fourth capacitor 134 and the third capacitor 133 and output a fourth working voltage and a third working voltage to the output interface 15. And the fourth operating voltage threshold v4 is greater than the third operating voltage threshold v 3.
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 and the third capacitor 133 are connected in series with the first capacitor 131 and grounded. 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 a working state, and respectively collect voltage differences at two ends of the fourth capacitor 134, the third capacitor 133, and the first capacitor 131 and output a fourth working voltage, a third working voltage, and the first working voltage to the output interface 15. And the fifth operating voltage threshold v5 is greater than the fourth operating voltage threshold v 4.
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, so that the fourth capacitor 134, the third capacitor 133 and the first capacitor 131 are kept connected in series to the ground, that is, the power supply apparatus 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 the operating state.
It should be noted that although the voltage value of the rectified voltage repeats the process of rising and falling voltage values, the switch control module 11 only executes 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 when the voltage value reaches the third operating voltage threshold v3 for the first time; the switch control module 11 only executes the switch control action of controlling the second sub-switch 123 to be turned on and controlling the third sub-switch 124 and the first switch 121 to be turned off when the voltage value reaches the fourth operating voltage threshold v4 for the first time; the switch control module 11 only executes the switch control action 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 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 … … nth time, the switch control module 11 does not perform any switching 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 execute any switch control action.
The peak value of the input voltage is usually fixed, and then the peak value of the rectified voltage obtained by rectifying the input voltage is also a fixed value, so that a 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 which can be reached by the rectified voltage in a plurality of voltage threshold intervals, and the connection or disconnection of each switch is controlled by determining a circuit connection mode matched with the input voltage, so that a plurality of power conversion modules contained in the power supply device can work in a lower voltage range, and therefore the power supply device can adopt devices with small impedance, small volume, small loss and low withstand voltage, and further considers the requirements of wide input voltage and high electric energy 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 a wide input voltage and a high power conversion efficiency can be satisfied, which is similar to the aforementioned embodiment of the power supply device including two capacitors, and thus, the description thereof is omitted here.
Based on the power supply device disclosed by the embodiment of the application, the embodiment of the application further discloses an electronic device, and the disclosed electronic device comprises the power supply device. The electronic device in the embodiment of the present application may be a smart phone, a tablet computer, an electronic book reader, a wearable device, or other devices, and the embodiment of the present application does not limit the specific type of the electronic device.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods of the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A power supply device, comprising a switch control module, a first switch and at least one second switch, a plurality of capacitors, and a plurality of power conversion modules equal in number to the plurality of capacitors, wherein:
the plurality of capacitors are connected in series;
in the plurality of capacitors, a first capacitor is connected with an input voltage, two adjacent capacitors are grounded through one second switch, and a last capacitor is grounded through the first switch;
each of the plurality of power conversion modules is connected in parallel with one of the capacitors;
the switch control module controls the number of the power supply 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 supply conversion modules in the working state is positively correlated with the input voltage.
2. The power supply device according to claim 1,
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 by further comprising:
and the rectifying module is connected with the switch control module and used for receiving the input voltage and outputting the rectified voltage after rectification to the switch control module.
4. The power supply device according to claim 3, wherein the at least one second switch includes a first sub-switch; the plurality of capacitors comprises 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 in series with the second capacitor;
the second capacitor is connected to the input voltage;
the first capacitor and the second capacitor are grounded through the first sub-switch;
the first capacitor is grounded through the first switch;
the first power supply conversion module is connected with the first capacitor in parallel;
the second power conversion module is connected in parallel with the second capacitor.
5. The power supply device according to claim 3, wherein the at least one second switch includes a second sub-switch and a third sub-switch; the plurality of capacitors comprises 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 capacitor and the fourth capacitor are grounded through the third sub-switch;
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 supply 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 in parallel with the fourth capacitor.
6. The power supply device according to claim 4,
when the rectified voltage reaches a first working voltage threshold value, the switch control module controls the first sub switch to be switched on and controls the first switch to be switched off, so that the second capacitor is grounded;
when the rectified voltage reaches a second working voltage threshold value, the switch control module controls the first switch to be switched on and controls the first sub-switch to be switched off, so that the first capacitor and the second capacitor are grounded in series; 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 the load under the state that the first switch is kept on and the first sub-switch is kept off.
7. The power supply device according to claim 5,
when the rectified voltage reaches a third working voltage threshold value, the switch control module controls the third sub-switch to be switched on and controls the second sub-switch and the first switch to be switched off, so that the fourth capacitor is grounded;
when the rectified voltage reaches a fourth working voltage threshold value, the switch control module controls the second sub switch to be switched on and controls the third sub switch and the first switch to be switched off, so that the fourth capacitor and the third capacitor are connected in series and grounded; wherein the fourth operating voltage threshold is greater than the third operating voltage threshold;
when the rectified voltage reaches a fifth working voltage threshold value, the switch control module controls the first switch to be switched on and controls the second sub-switch and the third sub-switch to be switched off, so that the fourth capacitor, the third capacitor and the first capacitor are grounded in series; 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 the load under the state that the first switch is kept on and the second sub-switch and the third sub-switch are kept off.
8. The power supply device according to claim 4,
the first power conversion module is in communication connection with the second power conversion module.
9. The power supply device according to claim 1,
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 characterized by comprising the power supply apparatus according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110121740.0A CN112910220B (en) | 2021-01-28 | 2021-01-28 | Power supply device and electronic apparatus |
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| Publication Number | Publication Date |
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| CN112910220A true CN112910220A (en) | 2021-06-04 |
| CN112910220B CN112910220B (en) | 2023-07-25 |
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| WO (1) | WO2022161352A1 (en) |
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| WO2022161352A1 (en) * | 2021-01-28 | 2022-08-04 | 维沃移动通信有限公司 | Power supply apparatus and electronic device |
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Also Published As
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| WO2022161352A1 (en) | 2022-08-04 |
| CN112910220B (en) | 2023-07-25 |
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