RESONANT INDUCTIVE COUPLING-BASED SYSTEM AND METHOD FOR WIRELESS DEVICE CHARGING

Abstract

The present disclosure generally relates to a wireless charging system (100) utilizing a radio frequency (RF) transmitter to generate electromagnetic waves at a specific frequency, which can efficiently charge mobile devices (102). The system (102) comprises a transmitter unit (104) connected to a charging port that emits RF waves, and a receiver unit (110) integrated into the mobile device (102), featuring an antenna and rectifier (114). The antenna captures the RF waves, and the rectifier (114) converts the induced alternating current (AC) into direct current (DC) suitable for charging the device’s battery. This wireless charging solution operates effectively within a range of a few feet, allowing users to engage with their devices while charging without the hassle of wires. The system (100) is designed for compatibility with various devices using the same connection port, operates safely at low voltage.

Specification

Description:TECHNICAL FIELD
[0001] The present disclosure generally relates to the field of wireless power transfer systems. More particularly, it pertains to a system and method for wirelessly charging mobile devices using resonant inductive coupling to efficiently transfer energy from a transmitter to a receiver integrated within the mobile device.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] The current methods of charging mobile devices present significant limitations and challenges. Traditional wired charging requires users to remain stationary while their device charges, making it difficult to move freely. This constraint is exacerbated when users need to use their phone while it is charging, such as during gaming or extended usage sessions, which can lead to damage to charging cables due to bending or excessive strain. This wear and tear can result in malfunctioning cables and increased maintenance costs.
[0004] Similarly, existing wireless charging solutions, while eliminating the need for cables, still require the mobile device to be placed on a stationary charging pad. This limitation prevents users from using their phones comfortably while charging, as the device must remain in one location for efficient energy transfer.
[0005] Other alternatives, such as using power banks, also rely on cables to connect to the mobile device, which are subject to the same issues of damage and wear during simultaneous usage and charging. Furthermore, power banks must be kept in close proximity to the user, which can be inconvenient and limit mobility.
[0006] These challenges highlight the need for an improved wireless charging system that allows users to charge their mobile devices without being tethered to a specific location or risking damage to cables and connectors.
[0007] Therefore, there is a need to overcome the above-mentioned problems by bringing a solution wireless charging system and method for mobile devices utilizing resonant Inductive coupling.

OBJECTS OF THE PRESENT DISCLOSURE
[0008] Some of the objects of the present disclosure, which at least one embodiment herein satisfy are as listed herein below.
[0009] A general object of the present disclosure is to provide a system and method for wireless charging of mobile devices that eliminates the need for traditional wired connections.
[0010] Another object of the present disclosure is to enable wireless power transfer using resonant inductive coupling that allows mobile devices to charge efficiently without requiring the device to remain stationary on a charging pad.
[0011] Another object of the present disclosure is to facilitate continuous and convenient charging of mobile devices while they are in use, offering greater mobility and user convenience compared to existing charging methods.
[0012] Another object of the present disclosure is to offer a system that can be implemented with minimal modifications to existing charging infrastructure and is scalable for use with various mobile device models.

SUMMARY
[0013] Various aspects of the present disclosure relates to the field of wireless power transfer systems. More particularly, it pertains to a system and method for wirelessly charging mobile devices using resonant inductive coupling to efficiently transfer energy from a transmitter to a receiver integrated within the mobile device.
[0014] An aspect of the present disclosure pertains to a system to utilizes radio frequency waves to charge a mobile device, the system may be configured to include a transmitter unit involving an inverter unit operatively connected to the transmitter unit configured to convert AC signal to high-frequency AC signal; and a transmitter resonant coil connected to the inverter, the transmitter resonant coil configured to resonate at a specific frequency and emit the high-frequency AC signal; and a receiver unit communicatively coupled with the transmitter unit, integrated at the mobile device.
[0015] Furthermore, the receiver unit can include a receiver resonant coil configured to resonate at the same frequency as the transmitter resonant coil to facilitate resonant inductive coupling and induce an AC voltage; a rectifier operatively connected to the receiver resonant coil, where the rectifier configured to convert the induced AC voltage to direct current (DC) voltage; and a voltage regulator connected to the rectifier, where the voltage regulator configured to regulate the DC voltage to provide a stable output for charging the mobile device's battery.
[0016] Another aspect of the present disclosure pertains to a method for wirelessly charging a mobile device using resonant inductive coupling, the method including the steps of: receiving alternating current (AC) power from an external power supply; inverting the AC power to generate a high-frequency AC signal; transmitting the high-frequency AC signal to a transmitter resonant coil, where the coil is configured to resonate at a specific frequency; tuning a receiver resonant coil integrated within the mobile device to resonate at the same frequency as the transmitter resonant coil; inducing an AC voltage in the receiver resonant coil through resonant inductive coupling between the transmitter and receiver resonant coils; rectifying the induced AC voltage in the receiver resonant coil to convert it into direct current (DC) voltage; regulating the DC voltage using a voltage regulator to ensure a stable output suitable for charging the mobile device's battery; incorporating the transmitter resonant coil within a wireless charging pad designed to house the power transmission components; and integrating the receiver resonant coil, rectifier, and voltage regulator within the mobile device to enable seamless wireless charging.
[0017] In an aspect, the step of inverting the AC power comprises converting the AC signal to a high-frequency AC signal optimized for efficient resonant inductive coupling.
[0018] In another aspect, tuning the transmitter resonant coils and receiver resonant coils to a predetermined frequency to maximize energy transfer efficiency within the wireless charging range.
[0019] In an aspect, the step of positioning the mobile device can include aligning the receiver resonant coil with the transmitter resonant coil on a wireless charging pad to facilitate optimal coupling.
[0020] In an aspect, the step of regulating the DC voltage further comprises monitoring the output voltage to adjust for fluctuations and ensure a consistent power supply to the mobile device.
[0021] In another aspect, the method can include detecting the presence of the mobile device on the wireless charging pad to initiate the power transfer process.
[0022] In an aspect, the rectifying step can include using a full-wave or half-wave rectifier circuit to achieve efficient AC-to-DC conversion for charging the mobile device.
[0023] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0024] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure.
[0025] In the figures, similar components and/or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[0026] FIG. 1 illustrates an exemplary block diagram of a system for wireless device charging using resonant inductive coupling, in accordance with an embodiment of the present disclosure.
[0027] FIG. 2 illustrates a flow diagram outlining the method for wireless device charging based on resonant inductive coupling, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0028] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0029] The present disclosure describes a system and method for wireless charging of mobile devices using resonant inductive coupling. The system includes an input module that receives AC power and converts it into a high-frequency AC signal transmitted through a resonant coil. A corresponding receiver coil in the mobile device captures this energy, inducing an AC voltage that is rectified to DC and regulated for battery charging. This approach eliminates the need for cables or stationary charging pads, providing users with a more flexible and durable charging solution integrated seamlessly into mobile devices.
[0030] The manner in which the proposed system works is described in further details in conjunction with FIGs. 1 - 2. It may be noted that these figures are only illustrative, and should not be construed to limit the scope of the subject matter in any manner.
[0031] FIG. 1 illustrates an exemplary block diagram of a system for wireless device charging using resonant inductive coupling, in accordance with an embodiment of the present disclosure.
[0032] Referring to FIG. 1, a system (100) may be configured to facilitate a wireless charging of a mobile device (102) through the use of resonant inductive coupling technology. The system (100) can include a transmitter unit (104) involving a connection interface, the transmitter unit (104) being configured to receive alternating current (AC) power from an external power supply, the transmitter unit (104) serving as a conduit for power transmission to downstream components of the system (100).
[0033] In an exemplary embodiment, the system (100) can include an inverter unit (106) operatively connected to the transmitter unit (104), the inverter unit (106) may be configured to convert the received AC power into a high-frequency AC signal, where the inverter unit (106) can include switching elements that enable modulation of the AC signal to facilitate efficient energy transfer.
[0034] In an exemplary embodiment, the system (100) can include a transmitter resonant coil (108) operatively connected to the inverter unit (106), the transmitter resonant coil (108) being specifically configured to resonate at a predetermined frequency, thereby enabling the emission of the high-frequency AC signal into the surrounding environment for the purpose of wireless power transfer.
[0035] In an exemplary embodiment, a receiver unit (110) may be communicatively coupled with the transmitter unit (104) and is integrated into the mobile device (102) to facilitate efficient wireless charging. This receiver unit (110) can include several key components designed to work together seamlessly. First, a receiver resonant coil (112) is included, which is specifically configured to resonate at the same frequency as the transmitter resonant coil (108), thereby enabling resonant inductive coupling. The receiver resonant coil (112) can facilitate the induction of an alternating current (AC) voltage within the receiver resonant coil (112) as it interacts with the electromagnetic field produced by the transmitter unit (104). A rectifier (114) is connected to the receiver resonant coil (112) and performs the essential function of converting the induced AC voltage into direct current (DC) voltage, rendering it suitable for charging the device's battery. Following this, a voltage regulator (116) may be integrated with the rectifier (114) to ensure that the DC voltage output is regulated and stable. This regulation is essential for maintaining consistent charging performance and protecting the mobile device's battery from potential overvoltage or fluctuations, ultimately enabling effective and reliable charging of the mobile device's battery.
[0036] FIG. 2 illustrates a flow diagram outlining the method for wireless device charging based on resonant inductive coupling, in accordance with an embodiment of the present disclosure.
[0037] In an exemplary embodiment, the method (200) for wirelessly charging mobile devices using resonant inductive coupling outlines a systematic approach to transferring electrical energy without the need for physical connections. At step (202), the method (200) may involve initiating the reception of AC power, which is critical for the functionality of the charging system, enabling the conversion and transmission of electrical energy to the mobile device (102) without physical connectors. The step is fundamental to establishing a flow of electrical energy necessary for the subsequent processes may be involved in resonant inductive coupling, ultimately leading to the efficient and effective charging of the mobile device's battery.
[0038] Continuing further, at step (204), the method (200) may involve inverting the received alternating current (AC) power to generate a high-frequency AC signal. The process is executed using an inverter unit (106), which modulates the characteristics of the input AC power to produce a signal with a significantly higher frequency than that of the original AC power source. The generation of a high-frequency AC signal is crucial for the efficacy of resonant inductive coupling, as it can allow for more efficient energy transfer between the transmitter resonant coils (108) and the receiver resonant coils (112). By operating at elevated frequencies, the system (200) can enhance the coupling between the coils, leading to increased power transfer efficiency and reduced energy losses.
[0039] Continuing further, at step (206), the method (200) may involve transmitting the high-frequency AC signal to a transmitter resonant coil (108), which is specifically configured to resonate at a predetermined frequency. This transmission process is critical for enabling resonant inductive coupling, as it ensures that the energy emitted from the transmitter resonant coil (108) matches the resonant frequency of the coil itself. The design of the coil, including its inductance and physical characteristics, is tailored to optimize resonance, thereby enhancing the efficiency of energy transfer to a nearby receiver resonant coil. When the high-frequency AC signal is delivered to the transmitter resonant coil (108), it can generate an oscillating electromagnetic field that extends into the surrounding space. This electromagnetic field is instrumental in facilitating the induction of an alternating current in the receiver resonant coil positioned within its vicinity.
[0040] Continuing further, at step (208), the method (200) may involve tuning a receiver resonant coil (112), which is integrated within the mobile device (102), to resonate at the same frequency as the transmitter resonant coil (108). This tuning process is essential for achieving optimal resonant inductive coupling between the two coils, as resonance occurs when both coils operate at identical frequencies. The receiver resonant coil (112) is designed with specific inductive properties that allow it to be adjusted or optimized to match the frequency of the electromagnetic field generated by the transmitter resonant coil (108). By ensuring that the receiver resonant coil is accurately tuned to the transmitter's frequency, the method enhances the efficiency of energy transfer, allowing for the effective induction of alternating current (AC) voltage in the receiver coil.
[0041] Continuing further, at step (210), the method (200) may involve inducing an alternating current (AC) voltage in the receiver resonant coil (112) through resonant inductive coupling between the transmitter and receiver resonant coils. The induction occurs as a result of the electromagnetic field generated by the transmitter resonant coil (108) when it resonates at the designated frequency. As the high-frequency AC signal is transmitted, the oscillating magnetic field permeates the space surrounding the transmitter coil, intersecting the receiver resonant coil (112) positioned within its range. Due to the precise tuning of the receiver resonant coil to match the transmitter's resonant frequency, an efficient coupling takes place, allowing the magnetic field to induce an AC voltage in the receiver coil. The process is fundamentally reliant on Faraday's law of electromagnetic induction, which states that a change in the magnetic field within a closed loop induces an electromotive force (EMF) in the conductor. As a result, the induced AC voltage can be effectively harnessed for further processing, ultimately leading to the charging of the mobile device's battery.
[0042] Further, at step (212), the method (200) may involve rectifying the induced alternating current (AC) voltage in the receiver resonant coil (112) to convert it into direct current (DC) voltage. This rectification process is essential because most electronic devices, including mobile devices, require a stable DC voltage for efficient battery charging. The induced AC voltage, generated through resonant inductive coupling, is first directed to a rectifier, which typically employs diodes or other semiconductor devices to allow current to flow in only one direction. By doing so, the rectifier (114) effectively transforms the bidirectional AC voltage into a unidirectional DC voltage.
[0043] Continuing further, at step (214), the method (200) may involve regulating the direct current (DC) voltage using a voltage regulator (116) to ensure a stable output that is suitable for charging the mobile device's battery. This regulation process is critical, as it maintains the DC voltage within a specific range that the mobile device can safely accept for charging. The voltage regulator (116) functions to adjust and stabilize the output voltage, compensating for any fluctuations or variations in the input voltage that may occur during the charging process. By utilizing components such as linear regulators or switching regulators, the voltage regulator effectively manages the voltage level, providing a consistent and reliable power supply to the mobile device.
[0044] Continuing further, at step (216), the method (200) may involve incorporating the transmitter resonant coil (108) within a wireless charging pad that is specifically designed to house the power transmission components. The integration is a pivotal aspect of the wireless charging system, as the charging pad serves as the primary interface for the transfer of energy to the mobile device. The transmitter resonant coil (108) is strategically positioned within the charging pad to optimize its interaction with the receiver resonant coil located in the mobile device. The design of the charging pad not only accommodates the transmitter coil but also includes necessary components such as the inverter, power supply connections, and additional circuitry required for efficient energy transmission. By housing these elements within a dedicated charging pad, the system ensures that the electromagnetic field generated by the transmitter resonant coil is maximized, facilitating effective resonant inductive coupling when a mobile device is placed on or near the pad.
[0045] At step (218), the method (200) may involve integrating the receiver resonant coil (112), rectifier (114), and voltage regulator (116) within the mobile device (102) to enable seamless wireless charging. The integration is crucial for creating a cohesive and efficient charging system that operates without the need for physical connectors. By embedding the receiver resonant coil within the mobile device, the system ensures that the device can effectively capture the electromagnetic energy transmitted by the transmitter resonant coil housed in the charging pad. The rectifier is essential in this configuration, as it converts the induced alternating current (AC) voltage from the receiver coil into direct current (DC) voltage, which is necessary for charging the device's battery.
[0046] Additionally, the voltage regulator (116) is incorporated to maintain a stable and safe output voltage, protecting the battery from fluctuations that could lead to damage or inefficiency. The seamless integration of components allows for a streamlined design that enhances the user experience, enabling convenient wireless charging without cumbersome cables or connections, and ensuring that the mobile device can efficiently utilize the energy received for charging its battery.
[0047] In summary, the invention pertains to a wireless charging system utilizing a radio frequency (RF) transmitter connected to a charging port, which generates electromagnetic waves at a specific frequency that carry energy. The system is designed to charge smartphones equipped with a receiver that comprises an antenna and a rectifier. The antenna captures the RF waves emitted by the transmitter, while the rectifier converts the resulting alternating current (AC) into direct current (DC), enabling the charging of the device's battery. This method facilitates a completely wireless charging experience, with an operational range extending over several feet, thereby enhancing convenience and mobility for users.
[0048] The above-described features, configurations, effects, and the like are included in at least one of the embodiments of the present invention, and should not be limited to only one embodiment. In addition, the features, configurations, effects, and the like as illustrated in each embodiment may be implemented with regard to other embodiments as they are combined with one another or modified by those skilled in the art. Thus, content related to these combinations and modifications should be construed as including in the scope and spirit of the invention as disclosed in the accompanying claims.
[0049] Various embodiments of the methods and systems for real time solar panel level monitoring system identify faults in the solar panels at an early stage, allowing for quick repairs before the faults become more serious and affect the overall performance of the solar plant. However, it should be apparent to those skilled in the art that modifications in addition to those described, are possible without departing from the inventive concepts herein. The embodiments, therefore, are not restrictive, except in the spirit of the disclosure. Moreover, in interpreting the disclosure, all terms should be understood in the broadest possible manner consistent with the context. In particular, the terms "comprises" and "comprising" should be interpreted as referring to elements, components, or steps, in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced.
[0050] Those skilled in the art will appreciate that any of the aforementioned steps and/or system modules may be suitably replaced, reordered, or removed, and additional steps and/or system modules may be inserted, depending on the needs of a particular application. In addition, the systems of the aforementioned embodiments may be implemented using a wide variety of suitable processes and system modules and is not limited to any particular computer hardware, software, middleware, firmware, microcode, or the like.
[0051] It will be appreciated that variants of the above disclosed, and other features and functions or alternatives thereof, may be combined into many other different systems or applications. Presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may be subsequently made by those skilled in the art, which are also intended to be encompassed by the following claims.

ADVANTAGES OF THE INVENTION
[0052] The proposed disclosure overcomes the above drawback, limitations, and shortcomings associated with the existing gaming practices.
[0053] The present disclosure allows users to charge their phones without the need for cumbersome cables, providing a more convenient and clutter-free experience.
[0054] The present disclosure represents a one-time investment that is affordable, reducing the ongoing costs associated with replacing damaged charging cables and adapters.
[0055] The present disclosure operates effectively over a range of a few feet, allowing users the freedom to move around while their device charges.
, Claims:1. A system (100) to utilize radio frequency waves to charge a mobile device (102), the system (100) comprising:
a transmitter unit (104) comprises:
an inverter unit (106) operatively connected to the transmitter unit (104) configured to convert AC signal to high-frequency AC signal; and
a transmitter resonant coil (108) connected to the inverter, the transmitter resonant coil configured to resonate at a specific frequency and emit the high-frequency AC signal; and
a receiver unit (110) communicatively coupled with the transmitter unit (104), integrated at the mobile device (102), wherein the receiver unit (108) comprises:
a receiver resonant coil (112) configured to resonate at the same frequency as the transmitter resonant coil (108) to facilitate resonant inductive coupling and induce an AC voltage;
a rectifier (114) operatively connected to the receiver resonant coil (112), wherein the rectifier (114) configured to convert the induced AC voltage to direct current (DC) voltage; and
a voltage regulator (116) connected to the rectifier (114), wherein the voltage regulator (116) configured to regulate the DC voltage to provide a stable output for charging the mobile device's battery.
2. A method (200) for wirelessly charging a mobile device (102) using resonant inductive coupling, the method (200) comprising the steps of:
receiving (202) alternating current (AC) power from an external power supply;
Inverting (204) the AC power to generate a high-frequency AC signal; transmitting (206) the high-frequency AC signal to a transmitter resonant coil, wherein the coil is configured to resonate at a specific frequency;
tuning (208) a receiver resonant coil integrated within the mobile device to resonate at the same frequency as the transmitter resonant coil;
inducing (210) an AC voltage in the receiver resonant coil through resonant inductive coupling between the transmitter and receiver resonant coils;
rectifying (212) the induced AC voltage in the receiver resonant coil to convert it into direct current (DC) voltage;
regulating (214) the DC voltage using a voltage regulator (116) to ensure a stable output suitable for charging the mobile device's battery;
incorporating (216) the transmitter resonant coil (108) within a wireless charging pad designed to house the power transmission components; and
integrating (218) the receiver resonant coil (112), rectifier (114), and voltage regulator (116) within the mobile device (102) to enable seamless wireless charging.
3. The method (100) as claimed in claim 1, wherein the step of inverting the AC power comprises converting the AC signal to a high-frequency AC signal optimized for efficient resonant inductive coupling.
4. The method (100) as claimed in claim 1, further comprises tuning the transmitter resonant coils (108) and receiver resonant coils (112) to a predetermined frequency to maximize energy transfer efficiency within the wireless charging range.
5. The method (100) as claimed in claim 1, wherein the step of positioning the mobile device (102) comprises aligning the receiver resonant coil (112) with the transmitter resonant coil (108) on a wireless charging pad to facilitate optimal coupling.
6. The method (100) as claimed in claim 1, wherein the step of regulating the DC voltage further comprises monitoring the output voltage to adjust for fluctuations and ensure a consistent power supply to the mobile device (102).
7. The method (100) as claimed in claim 1, further comprises detecting the presence of the mobile device (102) on the wireless charging pad to initiate the power transfer process.
8. The method (100) as claimed in claim 1, wherein the rectifying step comprises using a full-wave or half-wave rectifier circuit to achieve efficient AC-to-DC conversion for charging the mobile device (102).

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