CN217335215U - Wireless power supply system, household appliance and air conditioner - Google Patents
Wireless power supply system, household appliance and air conditioner Download PDFInfo
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- CN217335215U CN217335215U CN202220196360.3U CN202220196360U CN217335215U CN 217335215 U CN217335215 U CN 217335215U CN 202220196360 U CN202220196360 U CN 202220196360U CN 217335215 U CN217335215 U CN 217335215U
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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 utility model discloses a wireless power supply system, include: the wireless receiving circuit comprises a wireless receiving circuit, a voltage stabilizing circuit and load equipment, wherein the voltage stabilizing circuit comprises a control end, an input end and an output end, the control end is used for receiving a control signal to adjust the input impedance of the voltage stabilizing circuit, the input end of the voltage stabilizing circuit is electrically connected with the output end of the wireless receiving circuit, and the output end of the voltage stabilizing circuit is electrically connected with a power supply end of the load equipment. Adopt the utility model discloses, when can solving among the prior art through the change of control carrier frequency and adjust wireless receiving circuit's output voltage, there are technical problem such as frequency bifurcation phenomenon and output voltage unstability.
Description
Technical Field
The utility model belongs to wireless power transmission field especially relates to a wireless power supply system, domestic appliance and air conditioner.
Background
Wireless power transmission is a technology that uses an energy carrier in a physical space to realize power transmission from a transmitting end to a receiving end, i.e., from a power supply side to a load side. Compared with the traditional wired power transmission, the wireless power transmission avoids the phenomena of wire friction, aging and the like. Among the wireless power transmission technologies, the electromagnetic induction type wireless power transmission technology is widely used due to its advantages of high transmission efficiency, large transmission power, and the like.
In the electromagnetic induction type wireless transmission technology, the wireless transmission of corresponding electric energy needs to be realized through a transmitting circuit and a receiving circuit with the same resonant frequency. In the prior art, the output voltage of the receiving circuit increases with the increase of the load impedance, and the change of the carrier frequency at the side of the transmitting circuit needs to be controlled so as to adjust the output voltage. However, in practice, it is found that, in the process of adjusting the output voltage by controlling the change of the carrier frequency, there are problems of circuit control frequency bifurcation, unstable output voltage, and the like.
Disclosure of Invention
The utility model discloses when aiming at solving the output voltage who adjusts receiving circuit through the change of control carrier frequency among the prior art, there are frequency bifurcation phenomenon and the unstable technical problem of output voltage, provide a wireless power supply system, domestic appliance and air conditioner.
In a first aspect, an embodiment of the present invention provides a wireless power supply system, including: wireless receiving circuit, voltage stabilizing circuit and load equipment, wherein:
the voltage stabilizing circuit comprises a control end, an input end and an output end, wherein the control end is used for receiving a control signal to adjust the input impedance of the voltage stabilizing circuit, the input end of the voltage stabilizing circuit is electrically connected with the output end of the wireless receiving circuit, and the output end of the voltage stabilizing circuit is electrically connected with the power supply end of the load equipment.
In some embodiments, the voltage stabilizing circuit includes a first inductor, a diode, and a power device, one end of the first inductor is electrically connected to the input end of the voltage stabilizing circuit, the other end of the first inductor is electrically connected to the anode of the diode and the drain of the power device, respectively, the gate of the power device is electrically connected to the control end, the cathode of the diode is electrically connected to the output end of the voltage stabilizing circuit, and the source of the power device is electrically connected to the reference end of the wireless receiving circuit.
In some embodiments, the voltage stabilizing circuit includes a first inductor, a diode, and a power device, a drain of the power device is electrically connected to the input end of the voltage stabilizing circuit, a gate of the power device is electrically connected to the control end, a source of the power device is electrically connected to a cathode of the diode and one end of the first inductor, respectively, an anode of the diode is electrically connected to the reference end of the wireless receiving circuit, and the other end of the first inductor is electrically connected to the output end of the voltage stabilizing circuit.
In some embodiments, the voltage stabilizing circuit further includes a first capacitor, and two ends of the first capacitor are electrically connected to the output end of the voltage stabilizing circuit and the reference end of the wireless receiving circuit, respectively.
In some embodiments, the wireless power supply system further includes a wireless transmitting circuit, the wireless transmitting circuit includes an inverter circuit and a first resonant circuit that are electrically connected, the first resonant circuit includes a second inductor and a second capacitor, and the second inductor is electrically connected to two output terminals of the inverter circuit after being connected in series with the second capacitor.
In some embodiments, the wireless transmission circuit further includes a first filter circuit, and the first filter circuit, the inverter circuit, and the first resonant circuit are electrically connected in sequence.
In some embodiments, the wireless power supply system further includes a commercial power input circuit, the commercial power input circuit includes a commercial power ac power supply and a first rectification circuit, and the first rectification circuit is electrically connected to the commercial power ac power supply and the wireless transmission circuit, respectively.
In some embodiments, the wireless receiving circuit includes a second resonant circuit and a second rectifying circuit electrically connected to each other, the second resonant circuit includes a third inductor and a third capacitor, and the third inductor and the third capacitor are connected in series and then electrically connected to two input terminals of the second rectifying circuit.
In some embodiments, the wireless receiving circuit further includes a second filter circuit, and the second resonant circuit, the second rectifying circuit, and the second filter circuit are electrically connected in sequence.
In some embodiments, the first and second filtering circuits comprise filter capacitors.
In a second aspect, an embodiment of the present invention provides a household appliance, where the household appliance adopts the wireless power supply system provided by the first aspect.
In a third aspect, an embodiment of the present invention provides an air conditioner, where the air conditioner employs the wireless power supply system provided by the first aspect.
The embodiment of the utility model provides an among the one or more technical scheme, wireless power supply system includes wireless receiving circuit, voltage stabilizing circuit and load equipment, wherein voltage stabilizing circuit includes control end, input and output, the control end is used for receiving control signal with the adjustment voltage stabilizing circuit's input impedance, voltage stabilizing circuit's input with wireless receiving circuit's output electric connection, voltage stabilizing circuit's output with load equipment's feeder ear electric connection. In the above scheme, the utility model discloses voltage stabilizing circuit's input impedance is adjusted to the accessible, and then the output voltage of wireless receiving circuit/voltage stabilizing circuit is stable among the control wireless power supply system, is convenient for follow-up for load equipment provides stable operating voltage, guarantee load equipment's safety, steady operation. Meanwhile, the technical problems that the frequency bifurcation phenomenon and the output voltage instability exist when the output voltage of the wireless receiving circuit is adjusted by controlling the change of the carrier frequency in the prior art are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wireless power supply system according to an embodiment of the present invention.
Fig. 2-fig. 3 are schematic structural diagrams of two kinds of stabilizing circuits provided by the embodiment of the present invention.
Fig. 4 and fig. 5 are schematic structural diagrams of another two wireless power supply systems provided by the embodiments of the present invention.
Fig. 6 is a schematic waveform diagram of voltage regulation of a system according to an embodiment of the present invention.
Detailed Description
In view of the technical problems of frequency bifurcation and unstable output voltage existing in the prior art when the output voltage of a receiving circuit is adjusted by controlling the change of carrier frequency, the wireless power supply system, the household appliance and the air conditioner are provided, wherein the wireless power supply system comprises a wireless receiving circuit, a voltage stabilizing circuit and load equipment, wherein: the voltage stabilizing circuit comprises a control end, an input end and an output end, wherein the control end is used for receiving a control signal to adjust the input impedance of the voltage stabilizing circuit, the input end of the voltage stabilizing circuit is electrically connected with the output end of the wireless receiving circuit, the output end of the voltage stabilizing circuit is electrically connected with the power supply end of the load equipment, and therefore the output voltage stability of the wireless receiving circuit/voltage stabilizing circuit in the wireless power supply system is controlled by adjusting the input impedance of the voltage stabilizing circuit, stable working voltage is conveniently provided for the load equipment subsequently, the safe and stable operation of the load equipment is guaranteed, and the improvement of user experience is facilitated.
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Hereinafter, a wireless power supply system provided by an embodiment of the present specification will be described in detail with reference to specific embodiments in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural diagram of a wireless power supply system according to an embodiment of the present invention. The wireless power supply system shown in fig. 1 includes a wireless receiving circuit 20, a voltage stabilizing circuit 30, and a load device 40 (RL). The voltage stabilizing circuit 30 includes a control terminal, an input terminal and an output terminal, wherein the control terminal is configured to receive an externally input control signal, and is configured to adjust an input impedance of the voltage stabilizing circuit 30, so as to adjust an output voltage of the voltage stabilizing circuit 30 to be stable. The input end of the voltage stabilizing circuit 30 is connected to the output end of the wireless receiving circuit 20, and the output end of the voltage stabilizing circuit 30 is electrically connected to the power supply end of the load device 40. In other words, the voltage stabilizing circuit 30 is electrically connected to the wireless receiving circuit 20 and the load device 40, respectively.
The utility model relates to a voltage stabilizing circuit 30 is that the circuit that is used for stabilizing voltage stabilizing circuit 30's output signal (for example output voltage or output current etc.), about voltage stabilizing circuit 30's concrete circuit implementation the utility model discloses do not do the restriction, for example voltage stabilizing circuit 30 can be for step-down buck circuit, or boost circuit etc..
In some embodiments, please refer to fig. 2, which illustrates a schematic structure of one possible structure of the voltage stabilizing circuit 30. The voltage stabilizing circuit 30 shown in FIG. 2 includes: a first inductor L1, a diode D1 and a power device Qr. One end of the first inductor L1 is electrically connected to the input end of the voltage regulator circuit 30, the other end of the first inductor L1 is electrically connected to the anode of the diode D1 and the drain of the power device Qr, respectively, and the gate of the power device Qr is electrically connected to the control end of the stabilizing circuit 30, and is configured to receive an externally input control signal to control the input impedance (i.e., the resistance value of the entire circuit) of the voltage regulator circuit 30. The cathode of the diode D1 is electrically connected with the output end of the voltage stabilizing circuit, the source of the power device Qr is electrically connected with the reference end of the wireless receiving circuit, and optionally the reference end can be grounded.
Optionally, as shown in FIG. 2, a first capacitor E1 may be further included in the voltage regulating circuit 30, and the first capacitor E1 may function as a filter and a regulator. Specifically, the first capacitor E1 is connected in parallel to two ends of the load device 40, or two ends of the first capacitor E1 are electrically connected to the output end of the voltage stabilizing circuit 30 and the reference end of the wireless receiving circuit 20, respectively.
The utility model relates to a power device can be any one kind Transistor in IGBT (Insulated Gate Bipolar Transistor), MOS pipe, triode etc..
In some embodiments, please refer to fig. 3, which illustrates another possible structure of the voltage stabilizing circuit 30. The voltage stabilizing circuit 30 shown in FIG. 3 includes: a first inductor L1, a diode D1 and a power device Qr. The drain of the power device Qr is electrically connected to the input end of the voltage stabilizing circuit 30, and the gate of the power device Qr is electrically connected to the control end of the stabilizing circuit 30, and is configured to receive an externally input control signal 1 to control the input impedance (i.e., the resistance value of the entire circuit) of the voltage stabilizing circuit 30. The source of the power device Qr is electrically connected to the cathode of the diode D1 and one end of the first inductor L1, respectively. The anode of the diode D1 is electrically connected to the reference terminal of the wireless receiving circuit 20, and the other end of the first inductor L1 is electrically connected to the output terminal of the voltage regulator circuit 30.
Optionally, as shown in FIG. 3, a first capacitor E1 may be further included in the voltage regulating circuit 30, and the first capacitor E1 may function as a filter and a regulator. Specifically, the first capacitor E1 is connected in parallel to two ends of the load device 40, or two ends of the first capacitor E1 are electrically connected to the output end of the voltage stabilizing circuit 30 and the reference end of the wireless receiving circuit 20, respectively.
In some embodiments, please refer to fig. 4, which is a schematic structural diagram of another wireless power supply system provided in an embodiment of the present invention. As in the wireless power supply system shown in fig. 4, the wireless power supply system may further include a wireless transmission circuit 10. The wireless transmitting circuit 10 transmits an electrical energy signal, and the wireless receiving circuit 20 receives the corresponding electrical energy signal, and outputs a stable electrical energy signal, such as a stable voltage or a stable current, for supplying power to the load device 40 after the voltage is stabilized by the voltage stabilizing circuit 30. As shown in fig. 4, the wireless transmitting circuit 10 includes an inverter circuit 101 and a first resonant circuit 102, which are electrically connected. Optionally, the wireless transmitting circuit 10 may further include a first filter circuit 103, wherein a mounting position of the first filter circuit 103 is not limited, for example, the first filter circuit 103, the inverter circuit 101, and the first resonant circuit 102 are sequentially electrically connected in sequence in the figure.
It should be noted that the present invention relates to a rectifier circuit for converting an input ac signal into a corresponding dc signal, and the present invention is not limited thereto, and may include, but is not limited to, a full-bridge rectifier circuit, a half-bridge rectifier circuit, or other circuits supporting signal rectification. The resonant circuit is generally composed of an inductor L (also referred to as a coil) and a capacitor C, and a circuit capable of generating a resonance phenomenon at one or several frequencies, and the present invention is not limited to the specific circuit structure of the resonant circuit, and the following description is only given by way of example. The filter circuit is used for filtering an input electric energy signal (such as an alternating current signal or a direct current signal), for example, filtering out a signal with a frequency exceeding or lower than a corresponding preset frequency threshold value, and the like. The present invention is not limited to the specific implementation of the filter circuit, and the filter circuit may include, but is not limited to, a filter capacitor, etc. The following description of the present invention will be made by taking the first filter circuit 103 including the first filter capacitor C1 and the inverter circuit 101 as a full-bridge rectifier circuit, but the present invention is not limited thereto.
In an alternative embodiment, fig. 4 illustrates, by way of example, but not by way of limitation, that the inverter circuit 101 includes a full bridge rectifier circuit composed of 4 power devices, the first resonant circuit 102 includes a second inductor LT and a second capacitor CT, and the first filter circuit 103 includes a first filter capacitor C1. As shown in the figure, the inverter circuit 101 includes a first power device Q1, a second power device Q2, a third power device Q3, and a fourth power device Q4, where the power devices Q1, Q2, Q3, and Q4 may be any one of an IGBT (Insulated Gate Bipolar Transistor), an MOS (metal oxide semiconductor) Transistor, a triode, a rectifier diode, or other rectifier devices. In the figure, the source electrodes of the 4 power devices may be externally connected with corresponding control signals 2, and are used for controlling and adjusting the ac signals output by the inverter circuit 101, for example, adjusting parameter information such as duty ratios and frequency values of the ac signals. The utility model relates to a control signal 1 and control signal 2 can be the same, also can be inequality, and it specifically can be according to the actual demand setting of system. The second inductor LT, which may also be referred to as a transmitting coil, is connected in series with the second capacitor CT, and then is electrically connected to the two ac output terminals of the inverter circuit 101. The first filter capacitor C1 is connected in parallel between two dc input terminals of the inverter circuit 101. Alternatively, the two dc input terminals of the inverter circuit 101 may be electrically connected to an external input power source (the voltage thereof may be represented as + Pbus).
In some embodiments, as in the wireless power supply system shown in fig. 4, the wireless power supply system may further include a mains input circuit 50. The commercial power input circuit 50 includes a commercial power ac power supply 501 and a first rectification circuit 502(Br1), the first rectification circuit 502 is electrically connected to the commercial power ac power supply 501 and two dc input ends of the wireless transmitting circuit 10, respectively, and is configured to convert an ac signal provided by the commercial power ac power supply 501 into a corresponding dc signal and transmit the dc signal to the wireless transmitting circuit 10.
In some embodiments, as in the wireless power supply system shown in fig. 4, the wireless receiving circuit 20 includes a second resonant circuit 202 and a second rectifying circuit 201 electrically connected to each other. Optionally, the wireless receiving circuit 20 may further include a second filter circuit 203, wherein a mounting position of the second filter circuit 203 is not limited, for example, in the illustration, the second resonant circuit 202, the second rectifying circuit 201, and the second filter circuit 203 are sequentially electrically connected. The descriptions of the second rectification circuit 201, the second resonant circuit 202, and the second filter circuit 203 may correspondingly refer to the related descriptions in the wireless transmission circuit 10, and are not repeated here.
In an alternative embodiment, as shown in fig. 4, the second rectifying circuit 201 includes a full bridge array circuit composed of 4 rectifying diodes, the second resonant circuit 202 includes a third inductor Lr and a third capacitor Cr, and the second filter circuit 203 includes a second filter capacitor C2, which is exemplified, but not limited to. As shown, the inverter circuit 101 includes a first rectifying diode D1, a second rectifying diode D2, a third rectifying diode D3, and a fourth rectifying diode D4. The third inductor Lr may also be referred to as a receiving coil, and after being connected in series with the third capacitor Cr, the third inductor Lr is electrically connected to two ac input ends of the second rectifying circuit 201. The second filter capacitor C2 is connected in parallel between two dc output terminals of the second rectifier circuit 201, and plays a role of filtering.
In practical applications, as shown in the figure, in the wireless power supply system, the commercial power alternating current provided by the commercial power alternating current power supply 501 is rectified by the first rectification circuit 502(Br1) to be converted into direct current. And then the energy storage and filtering are carried out through a first filtering capacitor C1 to obtain stable direct current. Further, the direct current is rectified/inverted into an alternating current square wave under the rectification control of the inverter circuit 101. The rectified ac square wave is then applied to the first resonant circuit 102, and when the frequency of the ac square wave is the same as the resonant frequency of the first resonant circuit 102, the signal passing through LT and CT in the first resonant circuit 102 is a sine wave signal. The voltage values at two ends of the transmitting coil LT are related to the quality factor Q of the first resonant circuit, and when the Q value is larger, the voltage values at two ends of the LT are larger; conversely, the smaller the Q value, the smaller the voltage across LT. In general, Q is generally from 3 to 10.
The transmitting coil LT converts an alternating sine wave signal into an alternating electromagnetic field. According to the law of electromagnetic induction, the receiving coil Lr will induce an alternating current of the same frequency. Accordingly, on the side of the wireless receiving circuit 20, the receiving coil Lr outputs the induced ac power to the second rectifier circuit 201, and rectifies it into corresponding dc power. And then the second capacitor C2 stores and filters the energy and outputs the stable direct current to the stabilizing circuit 30. The stabilizing circuit 30 adjusts the power device Qr to output a stable output voltage U 0 To provide a correspondingly stable operating voltage for the load device 40, so that the load device 40 can operate more stably and safely. Optionally, the input voltage U of the stabilizing circuit 30 0 The calculation formula (2) is specifically shown in the following formula (1):
wherein, U 0 Is the input voltage, V, of the stabilizing circuit 30 in Is the input voltage (Pbus in the figure) across the inverter circuit 101, R L The resistance value of the load device 40, f is the operating frequency of the inverter circuit 101, and M is the magnetic induction coefficient between the wireless transmitter circuit 10 and the wireless receiver circuit 20, which may be the mutual inductance coefficient between the transmitter coil LT and the receiver coil Lr in this example.
As can be seen from the above equation (1), when the mains voltage increases, the input voltage and the output voltage of the wireless receiving circuit 20 increase, and accordingly the input voltage/input power of the voltage stabilizing circuit 30 also increases. When the input voltage of the wireless receiving circuit 20 increases, if the input impedance R of the stabilizing circuit 30 is controlled to decrease at this time, V is kept in R is not changed, thereby ensuring that the output voltage of the stabilizing circuit 30 is stable. Conversely, when the mains voltage decreases, the input voltage and the output voltage of the wireless receiving circuit 20 decrease, and accordingly the input voltage/input power of the voltage stabilizing circuit 30 also decreases. When the input voltage of the wireless receiving circuit 20 decreases, if the input impedance of the stabilizing circuit 30 increases, V is maintained in R is not changed, thereby ensuring that the output voltage of the stabilizing circuit 30 is stable. For example, please refer to fig. 6, which shows a schematic diagram of a possible system regulated voltage. As shown in fig. 6, a curve 1 represents a time-dependent curve of the input voltage (+ Pbus) of the wireless transmission circuit 10, a curve 2 represents a time-dependent curve of the input current of the wireless transmission circuit 10, and a curve 3 represents a time-dependent curve of the output voltage of the voltage stabilizing circuit 30. Wherein the ordinate of curve 2 fluctuates between-5 and + 5.
In some embodiments, the present invention can adjust the input impedance of the voltage stabilizing circuit 30 by controlling the control signal inputted from the control terminal of the voltage stabilizing circuit 30. Alternatively, the input impedance R of the stabilizing circuit 30 can be expressed as shown in the following equation (2):
the present invention is not limited to the specific embodiment for adjusting the input impedance of the voltage stabilizing circuit 30. Specifically, for example, when the voltage value across the load device 40 (i.e., the output voltage of the voltage stabilizing circuit 30) is too high, for example, higher than a preset required voltage, the duty ratio of the control signal input by the power device Qr (referred to as increasing the duty ratio of the power device Qr) may be controlled to decrease the input impedance of the voltage stabilizing circuit 30, so as to decrease the voltage value across the load device 40, and to control the stabilizing circuit 30 to stably output the corresponding output voltage. When the voltage value across the load device 40 is too low, for example, lower than a preset required voltage, the duty ratio of the control signal input by the power device Qr may be controlled to be decreased (for short, the duty ratio of the power device Qr is decreased) to increase the input impedance of the voltage stabilizing circuit 30, so as to increase the voltage value across the load device 40, and to control the stabilizing circuit 30 to stably output a corresponding output voltage.
The voltage regulator circuit 30 shown in fig. 4 is exemplified by the voltage regulator circuit shown in fig. 2. When the voltage stabilizing circuit 30 in fig. 4 is the voltage stabilizing circuit shown in fig. 3, a schematic structural diagram of another possible wireless power supply system shown in fig. 5 can be obtained. The wireless power supply system shown in fig. 5 is also composed of a wireless transmitting circuit 10, a wireless receiving circuit 20, a voltage stabilizing circuit 30, a load device 40 and a commercial power input circuit 50. The commercial power input circuit 50 rectifies and outputs the input commercial power alternating current, outputs a direct current sine half wave, and the wireless transmitting circuit 10 converts the direct current sine half wave into electromagnetic waves and transmits the electromagnetic waves to the wireless receiving circuit 20. The wireless receiving circuit 20 converts the received ac power into corresponding dc power, and transmits the dc power to the voltage stabilizing circuit 30 for stable output, i.e. stabilizing the corresponding output voltage. Since the voltage of the mains supply input is sine wave, the variation of the mains supply input voltage is large. In accordance with the voltage output characteristic of the wireless receiving circuit 20, both the output voltage and the input voltage are related to the load impedance, i.e., the input impedance of the voltage stabilizing circuit 30. When the parameters in the circuit do not change, for example, the parameters of the components in the circuit do not change, the input voltage of the wireless receiving circuit 20 is higher, i.e., the output voltage of the regulated voltage 30 is higher, for example, higherWhen presetting the demand voltage corresponding, the utility model discloses controllable voltage stabilizing circuit 30 steps down input voltage, for example reduces voltage stabilizing circuit 30's input impedance etc.. Conversely, when the input voltage of the wireless receiving circuit 20 is low, i.e. the output voltage of the voltage stabilizing circuit 30 is low, e.g. lower than the corresponding preset required voltage, the input impedance R of the voltage stabilizing circuit 30 may be controlled to be increased such that V in R remains constant, for example at a preset constant value, thereby ensuring that the output voltage of the stabilizing circuit 30 is stabilized. The above-mentioned description is referred to how to adjust the input impedance of the voltage stabilizing circuit 30, and the detailed description is omitted here.
The embodiment of the utility model provides an among the technical scheme, wireless power supply system includes wireless receiving circuit, voltage stabilizing circuit and load equipment, wherein voltage stabilizing circuit includes control end, input and output, the control end is for being used for receiving control signal with the adjustment voltage stabilizing circuit's input impedance's end, voltage stabilizing circuit's input with wireless receiving circuit's output electric connection, voltage stabilizing circuit's output with load equipment's feeder ear electric connection. In the technical scheme, the utility model discloses voltage stabilizing circuit's input impedance is adjusted to the accessible, and then the output voltage of wireless receiving circuit/voltage stabilizing circuit among the control wireless power supply system is stable, is convenient for follow-up for load equipment provides stable operating voltage, guarantee load equipment's safety, steady operation. Meanwhile, the technical problems that the frequency bifurcation phenomenon and the output voltage instability exist when the output voltage of the wireless receiving circuit is adjusted by controlling the change of the carrier frequency in the prior art are solved.
The utility model provides a domestic appliance, domestic appliance includes wireless power supply system, wireless power supply system specifically can refer to aforementioned figure 1-6 relevant introduction in the embodiment, and it is no longer repeated here.
The utility model provides an air conditioner, air conditioner includes wireless power supply system, wireless power supply system can specifically refer to aforementioned figure 1-6 relevant introduction in the embodiment, and it is no longer repeated here.
In the embodiments provided in the present invention, it should be understood that the disclosed technical content can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the 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 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 the parts serving as the control device 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.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (12)
1. A wireless power supply system, comprising: wireless receiving circuit, voltage stabilizing circuit and load equipment, wherein:
the voltage stabilizing circuit comprises a control end, an input end and an output end, wherein the control end is used for receiving a control signal to adjust the input impedance of the voltage stabilizing circuit, the input end of the voltage stabilizing circuit is electrically connected with the output end of the wireless receiving circuit, and the output end of the voltage stabilizing circuit is electrically connected with the power supply end of the load equipment.
2. The system of claim 1, wherein the voltage regulator circuit comprises a first inductor, a diode and a power device, one end of the first inductor is electrically connected to the input end of the voltage regulator circuit, the other end of the first inductor is electrically connected to the anode of the diode and the drain of the power device, respectively, the gate of the power device is electrically connected to the control terminal, the cathode of the diode is electrically connected to the output end of the voltage regulator circuit, and the source of the power device is electrically connected to the reference terminal of the wireless receiving circuit.
3. The system according to claim 1, wherein the voltage stabilizing circuit comprises a first inductor, a diode and a power device, a drain of the power device is electrically connected to an input terminal of the voltage stabilizing circuit, a gate of the power device is electrically connected to the control terminal, a source of the power device is electrically connected to a cathode of the diode and one end of the first inductor, respectively, an anode of the diode is electrically connected to a reference terminal of the wireless receiving circuit, and another end of the first inductor is electrically connected to an output terminal of the voltage stabilizing circuit.
4. The system of claim 2 or 3, wherein the voltage regulator circuit further comprises a first capacitor, and two ends of the first capacitor are electrically connected to the output end of the voltage regulator circuit and the reference end of the wireless receiving circuit respectively.
5. The system of claim 1, further comprising a wireless transmission circuit, wherein the wireless transmission circuit comprises an inverter circuit and a first resonant circuit electrically connected to each other, the first resonant circuit comprises a second inductor and a second capacitor, and the second inductor is electrically connected to two output terminals of the inverter circuit after being connected in series with the second capacitor.
6. The system of claim 5, wherein the wireless transmission circuit further comprises a first filter circuit, and wherein the first filter circuit, the inverter circuit, and the first resonant circuit are electrically connected in sequence.
7. The system of claim 5, further comprising a mains input circuit, wherein the mains input circuit comprises a mains alternating current power supply and a first rectifying circuit, and the first rectifying circuit is electrically connected to the mains alternating current power supply and the wireless transmitting circuit, respectively.
8. The system of claim 6, wherein the wireless receiving circuit comprises a second resonant circuit and a second rectifying circuit electrically connected to each other, the second resonant circuit comprises a third inductor and a third capacitor, and the third inductor and the third capacitor are connected in series and then electrically connected to two input terminals of the second rectifying circuit.
9. The system of claim 8, wherein the wireless receiving circuit further comprises a second filter circuit, and the second resonant circuit, the second rectifying circuit, and the second filter circuit are electrically connected in sequence.
10. The system of claim 9, wherein the first filter circuit and the second filter circuit comprise filter capacitors.
11. A household appliance, characterized in that it employs a wireless power supply system according to any one of the preceding claims 1-10.
12. An air conditioner, characterized in that the air conditioner employs the wireless power supply system as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220196360.3U CN217335215U (en) | 2022-01-24 | 2022-01-24 | Wireless power supply system, household appliance and air conditioner |
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| CN202220196360.3U CN217335215U (en) | 2022-01-24 | 2022-01-24 | Wireless power supply system, household appliance and air conditioner |
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