CN110022002B - Wireless charging emitter and charging device - Google Patents
Wireless charging emitter and charging device Download PDFInfo
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- CN110022002B CN110022002B CN201910190571.9A CN201910190571A CN110022002B CN 110022002 B CN110022002 B CN 110022002B CN 201910190571 A CN201910190571 A CN 201910190571A CN 110022002 B CN110022002 B CN 110022002B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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- H02J7/025—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
Abstract
The application provides a wireless charging transmitter and a charging device. This wireless transmitter that charges includes: the voltage stabilizing unit comprises a first switch, a first inductor, a first diode and a first capacitor, wherein the first switch is connected with a first access end of the power supply; the LC resonance circuit is connected with the voltage stabilizing unit; and the control unit is respectively connected with the LC resonance circuit and the voltage stabilizing unit, is used for controlling the electromagnetic wave emission of the LC resonance circuit according to the electric signal between the partial structure of the control unit and the LC resonance circuit, and is also used for controlling the opening and closing of the first switch according to the electric signal of the partial voltage stabilizing unit structure comprising the first capacitor. The wireless charging transmitter can be applied to a plurality of power supply devices with different input voltages.
Description
Technical Field
The application relates to the field of wireless charging, in particular to a wireless charging transmitter and a charging device.
Background
Along with the popularization of mobile intelligent equipment, after mobile intelligent equipment's battery power exhausts, need charge the continuation of journey to it, among the prior art, most utilize the charging wire to charge to mobile intelligent equipment's battery, it is more convenient.
However, the threshold of the input voltage of the wireless charging transmitter in the prior art is single, and the wireless charging transmitter is difficult to be applied to a plurality of power supply devices.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The main objective of the present application is to provide a wireless charging transmitter and a charging device, so as to solve the problem that the wireless charging transmitter in the prior art cannot be applied to a plurality of power supply devices with different input voltages.
In order to achieve the above object, according to one aspect of the present application, there is provided a wireless charging transmitter including: the voltage stabilizing unit comprises a first switch, a first inductor, a first diode and a first capacitor, wherein the first switch is connected with a first access end of a power supply, a first end of the first inductor is connected with the first switch, a second end of the first inductor is connected with a second access end of the power supply, a first end of the first capacitor is connected with the first switch, a second end of the first capacitor is connected with the second access end of the power supply, and the first diode is connected between the first inductor and the first capacitor; the first end of the LC resonance circuit is connected with the voltage stabilizing unit; and the control unit is connected with the LC resonance circuit and the voltage stabilizing unit respectively, is used for controlling the electromagnetic wave emission of the LC resonance circuit according to an electric signal between a partial structure of the control unit and the LC resonance circuit, and also controls the opening and closing of the first switch according to an electric signal of a partial voltage stabilizing unit structure comprising the first capacitor.
Further, a first terminal of the LC resonant circuit is connected to a second terminal of the first inductor.
Furthermore, the anode of the first diode is connected to the first end of the first capacitor and the control unit, respectively, and the cathode of the first diode is connected to the first end of the first inductor; or the anode of the first diode is connected with the second end of the first inductor, and the cathode of the first diode is connected with the second end of the first capacitor.
Further, the voltage stabilization unit further includes: and one end of the second diode is connected with the first inductor, and the other end of the second diode is connected with the first end of the LC resonance circuit.
Further, the voltage stabilization unit further includes: and one end of the third capacitor is connected with the second diode, and the other end of the third capacitor is connected with the first inductor.
Furthermore, the anode of the second diode is connected to the second end of the first inductor, and the cathode of the second diode is connected to the first end of the resonant circuit and the third capacitor, respectively; or the cathode of the second diode is connected with the first end of the first inductor, the anode of the second diode is connected with the first end of the resonant circuit and the control unit respectively, and the anode of the second diode is connected with the first end of the resonant circuit through the third capacitor.
Further, the control unit includes: a second switch having one end connected to a second end of the LC resonant circuit; the sampling circuit is used for acquiring an electric signal between the second switch and the LC resonance circuit, and is also used for acquiring an electric signal at two ends of the first capacitor or an electric signal between the first capacitor and the first diode; and one end of the logic circuit is connected with the sampling circuit, the other end of the logic circuit is connected with the second switch, and the logic circuit controls the on and off of the first switch and the on and off of the second switch according to the electric signals acquired by the sampling circuit.
Further, the control unit is a control chip, and preferably, the LC resonant circuit includes a second capacitor and a second inductor connected in parallel.
According to another aspect of the present application, there is provided a charging device comprising a wireless charging transmitter including any one of the wireless charging transmitters.
According to the technical scheme, the wireless charging transmitter comprises a voltage stabilizing unit, an LC resonance circuit and a control unit, wherein the LC resonance circuit can transmit electromagnetic waves to wirelessly charge a target electric appliance, and the control unit controls the electromagnetic waves of the LC resonance circuit to be transmitted according to a partial structure of the control unit and electric signals between the LC resonance circuits, namely controls the wireless charging process of the target electric appliance. The control unit also controls the opening and closing of the first switch according to an electric signal of a part of voltage stabilizing unit structure comprising the first capacitor, so that the input voltage of the transmitter is controlled, the power supply voltage threshold selection of the wireless charging transmitter is effectively widened, namely, the widening of the input voltage threshold can be realized through one control unit and one switch, and more power supply devices can be adapted. And when the first switch is closed, the first inductor stores energy, when the first switch is disconnected, the first inductor charges the first capacitor, a first diode is connected between the first capacitor and the first inductor, and a fixed voltage value is kept between the first capacitor and the first diode through the first diode, namely, constant voltage control is carried out at least through the first diode and the first capacitor. In addition, the wireless charging transmitter is simple in structure and low in power consumption, so that low-power-consumption wireless charging can be achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 to 8 show schematic structural diagrams of embodiments of a wireless charging transmitter of the present application.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background, the wireless charging transmitter in the prior art cannot be applied to a plurality of power supply devices with different voltages, and in order to solve the above problems, the present application proposes a wireless charging transmitter and a charging device.
In an exemplary embodiment of the present application, there is provided a wireless charging transmitter, as shown in fig. 1 to 8, including:
a voltage stabilizing unit including a first switch, a first inductor L1, a first diode D1, and a first capacitor C1, wherein one end of the first switch K1 is connected to a first power source input terminal (a positive power source terminal), a first end of the first inductor L1 is connected to the first switch K1, a second end of the first inductor L1 is connected to a second power source input terminal (a negative power source terminal), a first end of the first capacitor C1 is connected to the first switch K1, a second end of the first capacitor C1 is connected to the second power source input terminal, and the first diode D1 is connected between the first inductor L1 and the first capacitor C1;
an LC resonant circuit 10, a first end of which is connected to the voltage stabilizing unit;
and a control unit 20 connected to the LC resonant circuit and the voltage regulator unit, respectively, for controlling electromagnetic wave emission of the LC resonant circuit according to an electrical signal between a partial structure of the control unit and the LC resonant circuit, and controlling opening and closing of the first switch K1 according to an electrical signal of a partial voltage regulator unit structure including the first capacitor C1, wherein one end of the control unit is further connected to a negative terminal of a power supply.
The wireless charging transmitter comprises a voltage stabilizing unit, an LC resonance circuit and a control unit, wherein the LC resonance circuit can transmit electromagnetic waves to wirelessly charge a target electric appliance, and the control unit controls the electromagnetic wave transmission of the LC resonance circuit according to an electric signal between a partial structure of the control unit and the LC resonance circuit, namely controls the wireless charging process of the target electric appliance. The control unit also controls the opening and closing of the first switch K1 according to an electric signal of a partial voltage stabilizing unit structure comprising the first capacitor C1, so that the input voltage of the transmitter is controlled, the power supply voltage threshold selection of the wireless charging transmitter is effectively widened, namely, the widening of the input voltage threshold can be realized through one control unit and one switch, and more power supply devices can be adapted. When the first switch K1 is closed, the first inductor L1 stores energy, and when the first switch K1 is open, the first inductor L1 charges the first capacitor C1, the first diode D1 is connected between the first capacitor C1 and the first inductor L1, and the first diode D1 keeps a fixed voltage value between the first capacitor C1 and the first diode D1, that is, the constant voltage control is performed at least through the first diode D1 and the first capacitor C1. In addition, the wireless charging transmitter is simple in structure and low in power consumption, so that low-power-consumption wireless charging can be achieved.
In the present application, the connection means electrical connection unless otherwise specified. Also, electrical connection includes direct electrical connection and indirect electrical connection through other elements.
It should be noted that, in the present application, the first power input end and the second power input end are two ends of the power supply, one is a positive end, which is called a positive end for short, and the other is a negative end, which is called a negative end for short, where the "negative end of the power supply" in the present application is the negative end of the power supply, and may be the first power input end or the second power input end, and when the first power input end is the positive end and the second power input end is the negative end, as shown in fig. 1 to 8, the negative end of the power supply is the second power input end; when the first access end of the power supply is the negative end and the second access end of the power supply is the positive end, the negative end of the power supply is the first access end of the power supply.
The first terminal of the LC resonant circuit of the present application may be connected to any feasible location of the voltage regulator unit, and in a specific embodiment, as shown in fig. 1 to 4, the first terminal of the LC resonant circuit is connected to the second terminal of the first inductor L1. As shown in fig. 1, the first terminal of the LC resonant circuit is connected to the second terminal of the first inductor L1 through a first diode D1, as shown in fig. 2 and 4, the first terminal of the LC resonant circuit is directly connected to the second terminal of the first inductor L1, as shown in fig. 3, the first terminal of the LC resonant circuit is connected to the second terminal of the first inductor L1 through another diode (a second diode D2 mentioned later), that is, the voltage input to the resonant circuit is the voltage of the power supply voltage after being stepped down by a second diode D2.
The above-mentioned control unit of the present application may be any control unit that can control the opening and closing of the first switch K1, and can control whether the LC resonant circuit emits electromagnetic waves to the target electric appliance, and those skilled in the art can select an appropriate control unit to implement the above-mentioned functions according to actual situations.
It should be noted that, since the two ends of the first capacitor C1 and the two ends of the first inductor L1 are connected to the same component or port, the first capacitor C1 and the second inductor L2 are actually connected in parallel, and the aforementioned "connection of the first diode D1 between the first inductor L1 and the first capacitor C1" means that the first diode D1 is connected to one parallel branch, specifically, the first diode D1 actually forms one parallel branch with the first capacitor C1, and the first inductor L1 forms another parallel branch, as shown in fig. 1 to 8.
The first diode D1 is connected between the first capacitor C1 and the first inductor L1, and specifically, may be connected between a first terminal of the first capacitor C1 and a first terminal of the first inductor L1, or may be connected between a second terminal of the first capacitor C1 and a second terminal of the first inductor L1. In a case where the first diode D1 is connected between the first end of the first capacitor C1 and the first end of the first inductor L1, as shown in fig. 2 and 4, the positive electrode of the first diode D1 is connected to the first end of the first capacitor C1 and the control unit, respectively, and the negative electrode of the first diode D1 is connected to the first end of the first inductor L1; the first diode D1 is connected between the second terminal of the first capacitor C1 and the second terminal of the first inductor L1, as shown in fig. 1 and 3.
The voltage regulator unit of the present application is not limited to the structures of fig. 1 and 2, and in another embodiment of the present application, as shown in fig. 3 and 4, the wireless charging transmitter further includes a second diode D2, one end of the second diode D2 is connected to the first inductor L1, and the other end is connected to the first end of the LC resonant circuit. That is, the voltage input to the resonant circuit is the voltage of the power supply voltage after being stepped down by the second diode D2.
In practical applications, the second diode D2 may have two connection modes, wherein, in the first connection mode, the anode of the second diode D2 is connected to the second end of the first inductor L1, and the cathode of the second diode D2 is connected to the first end of the resonant circuit and the third capacitor C3, respectively, as shown in fig. 3; second, a cathode of the second diode D2 is connected to the first terminal of the first inductor L1, an anode of the second diode D2 is connected to the first terminal of the resonant circuit and the control unit, respectively, and an anode of the second diode D2 is connected to the first terminal of the resonant circuit through the third capacitor C3, as shown in fig. 4.
In order to further improve the voltage stabilizing effect of the voltage stabilizing unit, in another embodiment of the present application, as shown in fig. 3 and 4, the voltage stabilizing unit further includes a third capacitor C3, one end of the third capacitor C3 is connected to the second diode D2, and the other end is connected to the first inductor L1.
In a specific embodiment, as shown in fig. 5 to 8, the control unit 20 includes a second switch M1, a sampling circuit 21, and a logic circuit 22, wherein one end of the second switch M1 is connected to the second end of the LC resonant circuit; a sampling circuit 21 for acquiring an electrical signal between the second switch M1 and the LC resonant circuit, wherein the sampling circuit 21 is further configured to acquire an electrical signal between both ends of the first capacitor C1 or between the first capacitor C1 and the first diode D1; the logic circuit 22 has one end connected to the sampling circuit and the other end connected to the second switch M1, and the logic circuit 22 controls the first switch K1 and the second switch M1 to be turned on and off according to the electrical signal collected by the sampling circuit.
The sampling circuit may be connected to a suitable position in the wireless charging transmitter according to practical circumstances, as long as the sampling circuit can collect the electrical signal between the second switch M1 and the LC resonant circuit, the electrical signal between the two ends of the first capacitor C1, or the electrical signal between the first capacitor C1 and the first diode D1.
As shown in fig. 5 to 8, the sampling circuit 21 is an analog sampling circuit, the sampling circuit 21 includes a first terminal, a second terminal, a third terminal and a fourth terminal, the first terminal of the sampling circuit 21 is connected to the second terminal of the LC resonant circuit for collecting the electrical signal between the second switch M1 and the LC resonant circuit, the second terminal is connected to the second terminal of the first capacitor C1 for collecting the electrical signal between the two terminals of the first capacitor C1 or the electrical signal between the first capacitor C1 and the first diode D1, the third terminal is connected to the logic circuit for sending the sampled information to the logic circuit for processing, and the fourth terminals are respectively connected to the logic circuit 22 and a low-potential-reference terminal (or node, pin, etc.) of the control unit.
The first switch K1 and the second switch M1 of the present application may be any feasible switches in the prior art, and those skilled in the art may select the first switch K1 and the second switch M1 with suitable structures according to practical situations, for example, the first switch may be a single-pole single-throw switch, and may also be a MOS transistor, a triode, a relay, or the like, and the second switch may be a MOS transistor, a triode, or the like. In an embodiment of the present application, as shown in fig. 1 to 4, the first switch K1 is a single-pole double-throw switch, and the second switch M1 is a MOS transistor 1. Therefore, the structure of the wireless charging transmitter is simpler, and the power consumption is lower.
In an embodiment of the present application, the control unit is a control chip, that is, all the structures of the control unit are integrated on the same chip.
The LC resonant circuit of the present application may be any LC resonant circuit in the prior art that can emit electromagnetic waves to charge a target electrical appliance, for example, a series resonant circuit.
In a specific embodiment, the LC resonant circuit is a parallel resonant circuit, and the parallel resonant circuit includes a second capacitor C2 and a second inductor L2 connected in parallel, as shown in fig. 5 and 8.
The electric signal that the sampling circuit collection of this application obtained can be voltage signal, also can current signal, can also be current signal and voltage signal, and the different sampling circuit's that correspond of the electric signal of collection hookup location is different.
In another exemplary embodiment of the present application, there is provided a charging device including a wireless charging transmitter, the wireless charging transmitter being any one of the wireless charging transmitters described above.
The charging device comprises the wireless charging transmitter, so that the charging device is more flexible and convenient to apply.
In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions of the present application will be described below with reference to specific embodiments.
Example 1
As shown in fig. 5, the wireless charging transmitter includes a voltage stabilizing unit, an LC resonant circuit 10, and a control unit 20, wherein the control unit is a control chip.
The voltage stabilizing unit includes a first switch K1, a first inductor L1, a first diode D1 and a first capacitor C1, one end of the first switch K1 is connected to a first power source input terminal (a positive power source terminal), a first end of the first inductor L1 is connected to the first switch K1, a second end of the first inductor L1 is connected to a second power source input terminal (a negative power source terminal), a first end of the first capacitor C1 is connected to the first switch K1, and a second end of the first capacitor C1 is connected to the second power source input terminal through the first diode D1. The first diode D1 is connected between the second terminal of the first capacitor C1 and the second terminal of the first inductor L1.
The LC resonant circuit 10 is a parallel resonant circuit, and includes a second capacitor C2 and a second inductor L2, and a first end of the LC resonant circuit 10 is connected to a second end of the first capacitor C1.
The control unit 20 includes a second switch M1, a sampling circuit 21, and a logic circuit 22, wherein one end of the second switch M1 is connected to the second end of the LC resonant circuit, and the second switch M1 is a MOS transistor M1; the sampling circuit 21 includes a first end, a second end, a third end and a fourth end, the first end of the sampling circuit 21 is connected to the second end of the LC resonant circuit, and is configured to collect the electrical signal between the second switch M1 and the LC resonant circuit or the current signal flowing through M1, the second end is connected to the second end of the first capacitor C1, and is configured to collect the voltage signal at the two ends of the first capacitor C1 or the current signal flowing through C1, the third end is connected to the logic circuit 22, and is configured to send the sampled information to the logic circuit for processing, and the fourth end is connected to the logic circuit 22 and the negative end of the power supply, respectively. The logic circuit 22 has one end connected to the sampling circuit 21 and the other end connected to the second switch M1, and the logic circuit 22 controls the first switch K1 and the second switch M1 to be turned on and off according to the electrical signal collected by the sampling circuit.
Example 2
The difference from the embodiment 1 is that the connection position of the first diode D1 is different, and as shown in fig. 6, in this embodiment, the anode of the first diode D1 is connected to the first end of the first capacitor C1, and the cathode of the first diode D1 is connected to the first end of the first inductor L1.
Example 3
As shown in fig. 7, the difference from embodiment 1 is that the voltage regulator unit of the wireless charging transmitter further includes a second diode D2 and a third capacitor C3, and the specific connection relationship between the various elements is also different from that of embodiment 1, wherein the control unit 20 is a control chip.
The voltage stabilizing unit comprises a first switch K1, a first inductor L1, a first diode D1, a first capacitor C1, a second diode D2 and a third capacitor C3, wherein one end of the first switch K1 is connected to a first power supply input end (a power supply positive end), a first end of the first inductor L1 is connected to the first switch K1, a second end of the first inductor L1 is connected to a second power supply input end (a power supply negative end), a first end of the first capacitor C1 is connected to the first switch K1, and a second end of the first capacitor C1 is connected to the second power supply input end (a power supply negative end) through the first diode D1. A first end of the third capacitor C3 is connected to the first switch K1, a second end of the third capacitor C3 is connected to a cathode of the second diode D2, a cathode of the second diode D2 is further connected to a first end of the resonant circuit, and an anode of the second diode D2 is connected to a second end of the first inductor L1.
The connection relationship of the elements in the control unit 20 is the same as that in embodiment 1, and is not described here again.
Example 4
As shown in fig. 8, the difference from embodiment 3 is that the positions of the first diode D1 and the second diode D2 are different, in this embodiment, the anode of the first diode D1 is connected to the first end of the first capacitor C1, the cathode of the first diode D1 is connected to the first end of the first inductor L1, the anode of the second diode D2 is connected to the first end of the third capacitor C3, and the cathode of the first diode D1 is connected to the first end of the first inductor L1. The fourth terminal of the sampling circuit 22 is connected to the negative terminal of the power supply via two branches, specifically, the fourth terminal is connected to the negative terminal of the power supply via a branch connected with a second diode D2, and further connected to the negative terminal of the power supply via a branch connected with C3.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the wireless charging transmitter comprises a voltage stabilizing unit, an LC resonance circuit and a control unit, wherein the LC resonance circuit can transmit electromagnetic waves to wirelessly charge a target electric appliance, and the control unit controls the electromagnetic wave transmission of the LC resonance circuit according to an electric signal between a partial structure of the control unit and the LC resonance circuit, namely controls the wireless charging process of the target electric appliance. The control unit also controls the opening and closing of the first switch according to an electric signal of a part of voltage stabilizing unit structure comprising the first capacitor, thereby controlling the input voltage of the transmitter, effectively widening the power supply voltage threshold selection of the wireless charging transmitter, namely widening the input voltage threshold can be realized through one control unit and one switch, and more power supply devices can be adapted. And when the first switch is closed, the first inductor stores energy, when the first switch is disconnected, the first inductor charges the first capacitor, a first diode is connected between the first capacitor and the first inductor, and a fixed voltage value is kept between the first capacitor and the first diode through the first diode, namely, constant voltage control is carried out at least through the first diode and the first capacitor. In addition, the wireless charging transmitter is simple in structure and low in power consumption, so that low-power-consumption wireless charging can be achieved.
2) The charging device of this application is owing to including foretell wireless transmitter that charges, and it is more nimble convenient to use.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A wireless charging transmitter, comprising:
the voltage stabilizing unit comprises a first switch, a first inductor, a first diode and a first capacitor, wherein the first switch is connected with a first access end of a power supply, a first end of the first inductor is connected with the first switch, a second end of the first inductor is connected with a second access end of the power supply, a first end of the first capacitor is connected with the first switch, a second end of the first capacitor is connected with the second access end of the power supply, and the first diode is connected between the first inductor and the first capacitor;
the first end of the LC resonance circuit is connected with the voltage stabilizing unit;
a control unit connected to the LC resonance circuit and the voltage stabilizing unit, respectively, the control unit being configured to control electromagnetic wave emission of the LC resonance circuit according to an electrical signal between a partial structure of the control unit and the LC resonance circuit, the control unit further controlling opening and closing of the first switch according to an electrical signal of a partial voltage stabilizing unit structure including the first capacitor,
the control unit includes:
a second switch having one end connected to a second end of the LC resonant circuit;
the sampling circuit is used for acquiring an electric signal between the second switch and the LC resonance circuit, and is also used for acquiring an electric signal at two ends of the first capacitor or an electric signal between the first capacitor and the first diode;
a logic circuit, one end of which is connected with the sampling circuit and the other end of which is connected with the second switch, wherein the logic circuit controls the on and off of the first switch and the on and off of the second switch according to the electric signals acquired by the sampling circuit,
the voltage stabilization unit further includes:
and one end of the second diode is connected with the first inductor, and the other end of the second diode is connected with the first end of the LC resonance circuit.
2. The wireless charging transmitter of claim 1, wherein a first end of the LC resonant circuit is connected to a second end of the first inductor.
3. The wireless charging transmitter of claim 1,
the positive electrode of the first diode is connected with the first end of the first capacitor and the control unit respectively, and the negative electrode of the first diode is connected with the first end of the first inductor; or
The positive electrode of the first diode is connected with the second end of the first inductor, and the negative electrode of the first diode is connected with the second end of the first capacitor.
4. The wireless charging transmitter of claim 1, wherein the voltage regulator unit further comprises:
and one end of the third capacitor is connected with the second diode, and the other end of the third capacitor is connected with the first inductor.
5. The wireless charging transmitter of claim 4,
the anode of the second diode is connected with the second end of the first inductor, and the cathode of the second diode is respectively connected with the first end of the resonant circuit and the third capacitor; or
The negative pole of the second diode is connected with the first end of the first inductor, the positive pole of the second diode is respectively connected with the first end of the resonant circuit and the control unit, and the positive pole of the second diode is connected with the first end of the resonant circuit through the third capacitor.
6. The wireless charging transmitter of claim 1, wherein the control unit is a control chip, and preferably the LC resonant circuit comprises a second capacitor and a second inductor connected in parallel.
7. A charging device comprising a wireless charging transmitter, wherein the wireless charging transmitter is as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190571.9A CN110022002B (en) | 2019-03-13 | 2019-03-13 | Wireless charging emitter and charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190571.9A CN110022002B (en) | 2019-03-13 | 2019-03-13 | Wireless charging emitter and charging device |
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| US7279850B2 (en) * | 2003-04-09 | 2007-10-09 | Auckland Uniservices Ltd. | Decoupling circuits |
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| CN205356155U (en) * | 2016-02-05 | 2016-06-29 | 浙江大学 | Single tube buck -Boost -flyback voltage step -up and step -down typed circuit |
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